Time to Stable

For a given set of browsers, what APIs are in all of them and how many days it take for the API to land in the first browser to the last.

Example Comparisons
Browsers
Features

Summary

A count of the number of APIs that landed in A first and B last.
Last in SafariLast in Chrome
First in Safari 722
First in Chrome 937

Average time for an API to become available across Safari and Chrome

1659 APIs took an average of 844.93 days to become available to use.

API breakdown:

Average time to landing by year of first landing

If a feature landed in the earliest browser in 20XX it took Y days on average to become available in the last browser (when considering Safari and Chrome). TTA (time to available).
JS APIsJS TTAHTML APIsHTML TTA
2003 2861996.281131998.00
2004 0NaN121774.00
2005 92485.1131322.00
2007 25412.00102412.00
2008 3238.33157228.00
2009 11185.275220.60
2010 63245.1154400.81
2011 24181.7128490.07
2012 61263.33241049.67
2013 631162.864922.75
2014 121320.02211972.95
2015 63281.1781141.63
2016 92198.2826823.15
2017 32360.1612476.58
2018 58849.4812804.67
2019 47534.8115783.67
2020 38245.7961005.33
2021 17154.185517.60
2022 26172.048567.88
2023 46215.041193.00
2024 1113.002104.00

The Tortoise and the Hare

There is a natural tension on the web with respect to browser engines. Every engine has their own set of priorities which define the level of investment that they choose to make and on which areas they choose to make it.

A developer naturally wants their experiences to be available to the widest audience possible and these differing priorities create an unevenness on the platform (a lumpiness) making it harder for developers to build experiences that work everywhere.

This section highlights where browsers are pushing and pulling on the platform.

Sprinters

This table is designed to show which browsers are pushing on the platform the most.

Adding features to quickly is not always desired because developers are unlikely to adopt those features in their sites or apps.

For a given year, if a feature landed in Browser X first, how many days it take on average to be available in Safari and Chrome. TTA (time to available).
Year JSJS TTAHTMLHTML TTA
2003
  Safari 2861996.281131998.00
2004
  Safari 0NaN121774.00
2005
  Safari 92485.1131322.00
2007
  Safari 25412.00102412.00
2008
  Chrome 1179.00136179.00
  Safari 2268.0021545.33
2009
  Chrome 4336.25218.00
  Safari 799.003355.67
2010
  Safari 187.0010587.90
  Chrome 62247.6644358.30
2011
  Chrome 22171.8628490.07
  Safari 2290.000NaN
2012
  Chrome 3878.00171283.41
  Safari 31648.677482.00
2013
  Chrome 561231.182389.50
  Safari 7616.2921456.00
2014
  Chrome 113316.49211972.95
  Safari 8370.000NaN
2015
  Chrome 53293.0981141.63
  Safari 10218.000NaN
2016
  Chrome 80196.8821862.71
  Safari 12207.675657.00
2017
  Chrome 27386.787745.86
  Safari 5216.40599.60
2018
  Safari 15.0031334.67
  Chrome 57864.309628.00
2019
  Safari 0NaN4611.00
  Chrome 47534.8111846.45
2020
  Chrome 37248.274808.00
  Safari 1154.0021400.00
2021
  Chrome 14177.005517.60
  Safari 347.670NaN
2022
  Safari 18177.942134.00
  Chrome 8158.756712.50
2023
  Chrome 2294.41783.00
  Safari 24325.634110.50
2024
  Chrome 1113.002104.00

Plodders

This table is designed to show which browsers are pulling on the platform the most.

For a feature that first landed in year X, how many days did it take on average for the last browser to catch up across Safari and Chrome. TTA (time to available).
Year JS countJS TTAHTML countHTML TTA
2003
  Chrome 2861996.281131998.00
2004
  Chrome 0NaN121774.00
2005
  Chrome 92485.1131322.00
2007
  Chrome 25412.00102412.00
2008
  Safari 1179.00136179.00
  Chrome 2268.0021545.33
2009
  Safari 4336.25218.00
  Chrome 799.003355.67
2010
  Chrome 187.0010587.90
  Safari 62247.6644358.30
2011
  Safari 22171.8628490.07
  Chrome 2290.000NaN
2012
  Safari 3878.00171283.41
  Chrome 31648.677482.00
2013
  Safari 561231.182389.50
  Chrome 7616.2921456.00
2014
  Safari 113316.49211972.95
  Chrome 8370.000NaN
2015
  Safari 53293.0981141.63
  Chrome 10218.000NaN
2016
  Safari 80196.8821862.71
  Chrome 12207.675657.00
2017
  Safari 27386.787745.86
  Chrome 5216.40599.60
2018
  Chrome 15.0031334.67
  Safari 57864.309628.00
2019
  Chrome 0NaN4611.00
  Safari 47534.8111846.45
2020
  Safari 37248.274808.00
  Chrome 1154.0021400.00
2021
  Safari 14177.005517.60
  Chrome 347.670NaN
2022
  Chrome 18177.942134.00
  Safari 8158.756712.50
2023
  Safari 2294.41783.00
  Chrome 24325.634110.50
2024
  Safari 1113.002104.00

Stable APIs

Below is a list of features that are in Safari and Chrome

Raw Data

Quick Links:

HTML Data

API First Browser Date Last Browser Date Days Notes
html.elements.a 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: Starting with Firefox 41, <a> without href attribute is no longer classified as interactive content: clicking it inside <label> will activate labelled content (bug 1167816).Firefox for Android: Starting with Firefox for Android 41, <a> without href attribute is no longer classified as interactive content: clicking it inside <label> will activate labelled content (bug 1167816).
html.elements.a.charset 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.a.coords 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed.Firefox for Android: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed.
html.elements.a.download 📋Chrome9/16/2011 Safari3/27/20172019
Chrome: Starting in Chrome 65, cross-origin downloads are not supported on the <a> element.Chrome Android: Starting in Chrome Android 65, cross-origin downloads are not supported on the <a> element.Edge: Starting in Edge 79, cross-origin downloads are not supported on the <a> element.Edge: Until Edge 14 (build 14357), attempting to download data URIs caused Edge to crash (bug 7160092).Edge: Edge 17 or older didn't follow the attributes' value to determine filename (bug 7260192).Firefox for Android: The attribute's filename value only affects the suggested file name for the blob: and data: URI schemes. Other schemes ignore the suggested filename. See bug 1845642.Quest Browser: Starting in Quest Browser 5.0, cross-origin downloads are not supported on the <a> element.Opera: Starting in Opera 52, cross-origin downloads are not supported on the <a> element.Opera Android: Starting in Opera Android 47, cross-origin downloads are not supported on the <a> element.Samsung Internet: Starting in Samsung Internet 9.0, cross-origin downloads are not supported on the <a> element.WebView Android: Starting in WebView Android 65, cross-origin downloads are not supported on the <a> element.
html.elements.a.href 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.a.href.href_top Chrome12/11/2008 Safari6/8/2009179
html.elements.a.hreflang 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.a.implicit_noopener Safari3/25/2019 Chrome1/19/2021666
html.elements.a.name 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.a.ping 📋Chrome6/7/2011 Safari7/25/2012414
Firefox: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.Firefox for Android: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.
html.elements.a.referrerpolicy 📋Chrome5/25/2016 Safari9/16/20201575
html.elements.a.rel 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.a.rel.noopener 📋Chrome3/2/2016 Safari3/27/2017390
Firefox: Before Firefox 63, rel="noopener" created windows with all features disabled by default. Starting with Firefox 63, these windows have the same features enabled by default as any other window.Firefox for Android: Before Firefox for Android 63, rel="noopener" created windows with all features disabled by default. Starting with Firefox for Android 63, these windows have the same features enabled by default as any other window.
html.elements.a.rel.noreferrer 📋Safari6/7/2010 Chrome12/13/2011554
Internet Explorer: Only supported in IE11 in later versions of Windows 10 (creators update). (Per caniuse.com.)
html.elements.a.rev 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.a.shape 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed.Firefox for Android: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed.
html.elements.a.target 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.a.text_fragments Chrome2/4/2020 Safari10/24/2022993
html.elements.a.type 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.abbr 📋Chrome5/21/2009 Safari6/8/200918
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.acronym 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.address 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.area 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.area.alt 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.area.coords 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.area.download 📋Chrome10/12/2016 Safari3/27/2017166
html.elements.area.href 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.area.implicit_noopener Safari3/25/2019 Chrome1/19/2021666
html.elements.area.nohref 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.area.ping 📋Chrome6/7/2011 Safari7/25/2012414
Firefox: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.Firefox for Android: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.
html.elements.area.referrerpolicy 📋Chrome5/25/2016 Safari9/16/20201575
html.elements.area.rel 📋Safari6/7/2010 Chrome12/13/2011554
html.elements.area.rel.noopener 📋Chrome3/2/2016 Safari3/27/2017390
Firefox: Before Firefox 63, rel="noopener" created windows with all features disabled by default. Starting with Firefox 63, these windows have the same features enabled by default as any other window.Firefox for Android: Before Firefox for Android 63, rel="noopener" created windows with all features disabled by default. Starting with Firefox for Android 63, these windows have the same features enabled by default as any other window.
html.elements.area.rel.noreferrer 📋Safari6/7/2010 Chrome12/13/2011554
Internet Explorer: Only supported in IE11 in later versions of Windows 10 (creators update). (Per caniuse.com.)
html.elements.area.shape 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.area.target 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.article 📋Chrome5/25/2010 Safari6/7/201013
html.elements.aside 📋Chrome5/25/2010 Safari6/7/201013
html.elements.audio 📋Safari3/18/2008 Chrome9/15/2009546
Firefox: For Firefox to play audio, the server must serve the file using the correct MIME type.Firefox for Android: For Firefox for Android to play audio, the server must serve the file using the correct MIME type.
html.elements.audio.controls 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.audio.crossorigin 📋Chrome2/20/2014 Safari9/20/2016943
Firefox: With crossorigin="use-credentials", cookies aren't sent during seek. See bug 1532722.Firefox for Android: With crossorigin="use-credentials", cookies aren't sent during seek. See bug 1532722.
html.elements.audio.disableremoteplayback 📋Safari3/24/2020 Chrome1/23/20241400
html.elements.audio.loop 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.audio.muted 📋Chrome10/25/2011 Safari7/25/2012274
html.elements.audio.preload 📋Safari3/18/2008 Chrome9/15/2009546
Chrome: Defaults to metadata in Chrome 64.Chrome Android: Defaults to metadata in Chrome Android 64.Quest Browser: Defaults to metadata in Quest Browser 5.0.Opera: Defaults to metadata in Opera 51.Opera Android: Defaults to metadata in Opera 51.Samsung Internet: Defaults to metadata in Samsung Internet 9.0.WebView Android: Defaults to metadata in Chrome 64.
html.elements.audio.src 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.b 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.base 📋Safari10/26/2007 Chrome12/11/2008412
Internet Explorer: Before Internet Explorer 7, <base> can be positioned anywhere in the document and the nearest value of <base> is used.
html.elements.base.href 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.base.href.forbid_data_javascript_urls Chrome4/19/2017 Safari3/24/20201070
html.elements.base.href.relative_url Safari10/26/2007 Chrome12/11/2008412
html.elements.base.target 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.bdi 📋Chrome12/13/2011 Safari7/25/2012225
html.elements.bdo 📋Safari6/8/2009 Chrome10/25/2011869
html.elements.big 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.blockquote 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.blockquote.cite Chrome12/11/2008 Safari6/8/2009179
html.elements.body 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.body.alink Chrome12/11/2008 Safari6/8/2009179
html.elements.body.background Chrome12/11/2008 Safari6/8/2009179
html.elements.body.bgcolor Chrome12/11/2008 Safari6/8/2009179
html.elements.body.bottommargin Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 35, it was supported in Quirks Mode only.Firefox for Android: Before Firefox for Android 35, it was supported in Quirks Mode only.
html.elements.body.leftmargin Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 35, it was supported in Quirks Mode only.Firefox for Android: Before Firefox for Android 35, it was supported in Quirks Mode only.
html.elements.body.link Chrome12/11/2008 Safari6/8/2009179
html.elements.body.rightmargin Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 35, it was supported in Quirks Mode only.Firefox for Android: Before Firefox for Android 35, it was supported in Quirks Mode only.
html.elements.body.text Chrome12/11/2008 Safari6/8/2009179
html.elements.body.topmargin Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 35, it was supported in Quirks Mode only.Firefox for Android: Before Firefox for Android 35, it was supported in Quirks Mode only.
html.elements.body.vlink Chrome12/11/2008 Safari6/8/2009179
html.elements.br 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.br.clear Chrome12/11/2008 Safari6/8/2009179
html.elements.button 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.button.disabled 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.button.form Chrome2/3/2011 Safari7/20/2011167
html.elements.button.formaction Chrome2/3/2011 Safari7/20/2011167
html.elements.button.formenctype Chrome2/3/2011 Safari7/20/2011167
html.elements.button.formmethod Chrome2/3/2011 Safari7/20/2011167
html.elements.button.formnovalidate Chrome2/3/2011 Safari7/20/2011167
html.elements.button.formtarget Chrome2/3/2011 Safari7/20/2011167
html.elements.button.name Chrome12/11/2008 Safari6/8/2009179
html.elements.button.popovertarget 📋Chrome5/30/2023 Safari9/18/2023111
html.elements.button.popovertargetaction 📋Chrome5/30/2023 Safari9/18/2023111
html.elements.button.type Chrome12/11/2008 Safari6/8/2009179
html.elements.button.value Chrome12/11/2008 Safari6/8/2009179
html.elements.canvas 📋Safari4/29/2005 Chrome12/11/20081322
Firefox: Before Firefox 5, the canvas width and height were signed integers instead of unsigned integers.Firefox: Before Firefox 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox: Before Firefox 12, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Firefox for Android: Before Firefox for Android 5, the canvas width and height were signed integers instead of unsigned integers.Firefox for Android: Before Firefox for Android 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox for Android: Before Firefox for Android 14, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Safari: Although early versions of Apple's Safari browser don't require the closing tag, the specification indicates that it is required, so you should be sure to include it for broadest compatibility. Before version 2, Safari will render the content of the fallback in addition to the canvas itself unless you use CSS tricks to mask it.
html.elements.canvas.height 📋Safari4/29/2005 Chrome12/11/20081322
Firefox: Before Firefox 5, the canvas width and height were signed integers instead of unsigned integers.Firefox: Before Firefox 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox: Before Firefox 12, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Firefox for Android: Before Firefox for Android 5, the canvas width and height were signed integers instead of unsigned integers.Firefox for Android: Before Firefox for Android 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox for Android: Before Firefox for Android 14, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Safari: Although early versions of Apple's Safari browser don't require the closing tag, the specification indicates that it is required, so you should be sure to include it for broadest compatibility. Before version 2, Safari will render the content of the fallback in addition to the canvas itself unless you use CSS tricks to mask it.
html.elements.canvas.width 📋Safari4/29/2005 Chrome12/11/20081322
Firefox: Before Firefox 5, the canvas width and height were signed integers instead of unsigned integers.Firefox: Before Firefox 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox: Before Firefox 12, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Firefox for Android: Before Firefox for Android 5, the canvas width and height were signed integers instead of unsigned integers.Firefox for Android: Before Firefox for Android 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox for Android: Before Firefox for Android 14, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Safari: Although early versions of Apple's Safari browser don't require the closing tag, the specification indicates that it is required, so you should be sure to include it for broadest compatibility. Before version 2, Safari will render the content of the fallback in addition to the canvas itself unless you use CSS tricks to mask it.
html.elements.caption 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.caption.align Chrome12/11/2008 Safari6/8/2009179
html.elements.center 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.Firefox for Android: Before Firefox for Android 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.cite 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.code 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.col 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.col.align 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.col.char 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.col.charoff 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.col.span 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.col.valign 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.col.width 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.colgroup 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.colgroup.align 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.colgroup.char 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.colgroup.charoff 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.colgroup.span 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.colgroup.valign 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.colgroup.width 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.data 📋Safari9/20/2016 Chrome10/17/2017392
html.elements.data.value 📋Safari9/20/2016 Chrome10/17/2017392
html.elements.datalist 📋Chrome6/26/2012 Safari3/25/20192463
Firefox: The date and time input types are not supported.Firefox: The <datalist> element will only create a dropdown for textual types, such as text, search, url, tel, email and number. The date, time, range and color types are not supported.Firefox for Android: The dropdown menu containing available options does not appear. See bug 1535985.
html.elements.dd 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 4, this element was implemented using the HTMLSpanElement interface instead of HTMLElement.
html.elements.del 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.del.cite Safari10/26/2007 Chrome12/11/2008412
html.elements.del.datetime Safari10/26/2007 Chrome12/11/2008412
html.elements.details 📋Chrome6/7/2011 Safari7/25/2012414
Firefox: Before Firefox 57, there was a bug meaning that <details> elements can't be made open by default using the open attribute if they have a CSS animation active on them.Firefox for Android: There is a bug meaning that <details> elements can't be made open by default using the open attribute if they have a CSS animation active on them.
html.elements.details.name Chrome12/5/2023 Safari12/11/20236
html.elements.details.open Chrome6/7/2011 Safari7/25/2012414
html.elements.dfn 📋Chrome10/25/2011 Safari7/25/2012274
html.elements.dialog 📋Chrome8/26/2014 Safari3/14/20222757
html.elements.dialog.open Chrome8/26/2014 Safari3/14/20222757
html.elements.dir 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.dir.compact Chrome12/11/2008 Safari6/8/2009179
html.elements.div 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.div.align Safari10/26/2007 Chrome12/11/2008412
html.elements.dl 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.dt 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.em 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.embed 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.embed.align 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.embed.height 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.embed.name 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.embed.src 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.embed.type 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.embed.width 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.fieldset 📋Chrome12/11/2008 Safari6/8/2009179
Chrome: Before version 86, this element did not support flexbox and grid layouts within this element. See bug 41027853.Chrome Android: Before version 86, this element did not support flexbox and grid layouts within this element. See bug 41027853.Edge: Before version 86, this element did not support flexbox and grid layouts within this element. See bug 4511145.Quest Browser: Before version 12.0, this element did not support flexbox and grid layouts within this element. See bug 41027853.Samsung Internet: Before version 14.0, this element did not support flexbox and grid layouts within this element. See bug 41027853.WebView Android: Before version 86, this element did not support flexbox and grid layouts within this element. See bug 41027853.
html.elements.fieldset.disabled 📋Chrome6/26/2012 Safari7/25/201229
Edge: Does not work with nested fieldsets. For example: <fieldset disabled><fieldset><!--Still enabled--></fieldset></fieldset>Internet Explorer: Not all form control descendants of a disabled fieldset are properly disabled in IE11; see IE bug 817488: input[type='file'] not disabled inside disabled fieldset and IE bug 962368: Can still edit input[type='text'] within fieldset[disabled].
html.elements.fieldset.form 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.fieldset.name 📋Chrome5/15/2012 Safari7/25/201271
html.elements.figcaption 📋Chrome12/2/2010 Safari7/20/2011230
html.elements.figure 📋Chrome12/2/2010 Safari7/20/2011230
html.elements.font 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.font.color Chrome12/11/2008 Safari6/8/2009179
html.elements.font.face Chrome12/11/2008 Safari6/8/2009179
html.elements.font.size Chrome12/11/2008 Safari6/8/2009179
html.elements.footer 📋Chrome5/25/2010 Safari6/7/201013
html.elements.form 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.form.accept-charset 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.form.action 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.form.autocomplete 📋Chrome9/16/2011 Safari7/25/2012313
Chrome: The Google Chrome UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Chrome might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Chrome Android: The Chrome Android UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Chrome Android might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Quest Browser: The Quest Browser UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Quest Browser might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Opera: The Opera UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Opera might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Opera Android: The Opera Android UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Opera Android might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Samsung Internet: The Samsung Internet UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Samsung Internet might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.WebView Android: The WebView Android UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, WebView Android might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.
html.elements.form.autocomplete.one-time-code Safari9/17/2018 Chrome8/31/20211079
html.elements.form.enctype 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.form.method 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.form.name 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.form.novalidate 📋Chrome3/8/2011 Safari3/27/20172211
html.elements.form.rel 📋Safari3/14/2022 Chrome11/29/2022260
html.elements.form.target 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.frame 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.frame.frameborder Safari10/26/2007 Chrome12/11/2008412
html.elements.frame.marginheight Safari10/26/2007 Chrome12/11/2008412
html.elements.frame.marginwidth Safari10/26/2007 Chrome12/11/2008412
html.elements.frame.name Safari10/26/2007 Chrome12/11/2008412
html.elements.frame.noresize Safari10/26/2007 Chrome12/11/2008412
html.elements.frame.scrolling Safari10/26/2007 Chrome12/11/2008412
html.elements.frame.src Safari10/26/2007 Chrome12/11/2008412
html.elements.frameset 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.frameset.cols Safari10/26/2007 Chrome12/11/2008412
html.elements.frameset.rows Safari10/26/2007 Chrome12/11/2008412
html.elements.h1 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.h2 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.h3 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.h4 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.h5 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.h6 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.head 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.header 📋Chrome5/25/2010 Safari6/7/201013
html.elements.hgroup 📋Chrome5/25/2010 Safari6/7/201013
html.elements.hr 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.hr.align Chrome12/11/2008 Safari6/8/2009179
html.elements.hr.color Chrome2/20/2014 Safari3/27/20171131
html.elements.hr.hr_in_select Safari9/18/2023 Chrome10/31/202343
Chrome: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Chrome: Does not expose the <hr> within the accessibility tree.Edge: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Edge: Does not expose the <hr> within the accessibility tree.Firefox: Does not expose the <hr> within the accessibility tree.Firefox for Android: Does not expose the <hr> within the accessibility tree.Opera: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Opera: Does not expose the <hr> within the accessibility tree.Safari: Does not expose the <hr> within the accessibility tree.Safari on iOS: Does not expose the <hr> within the accessibility tree.WebView on iOS: Does not expose the <hr> within the accessibility tree.
html.elements.hr.noshade Chrome12/11/2008 Safari6/8/2009179
html.elements.hr.size Chrome12/11/2008 Safari6/8/2009179
html.elements.hr.width Chrome12/11/2008 Safari6/8/2009179
html.elements.html 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.html.version 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.html.xmlns Safari6/23/2003 Chrome12/11/20081998
html.elements.i 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.iframe 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: The resize CSS property doesn't have any effect on this element due to bug 680823.Firefox for Android: The resize CSS property doesn't have any effect on this element due to bug 680823.Safari: Safari has a bug that prevents iframes from loading if the iframe element was hidden when added to the page. iframeElement.src = iframeElement.src should cause it to load the iframe.Safari on iOS: Safari on iOS has a bug that prevents iframes from loading if the iframe element was hidden when added to the page. iframeElement.src = iframeElement.src should cause it to load the iframe.WebView on iOS: WebView on iOS has a bug that prevents iframes from loading if the iframe element was hidden when added to the page. iframeElement.src = iframeElement.src should cause it to load the iframe.
html.elements.iframe.align 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.iframe.allow 📋Chrome7/25/2017 Safari4/12/2018261
html.elements.iframe.allow.camera 📋Chrome1/23/2018 Safari4/12/201879
html.elements.iframe.allow.display-capture 📋Safari9/19/2019 Chrome9/21/2021733
html.elements.iframe.allow.microphone 📋Chrome1/23/2018 Safari4/12/201879
html.elements.iframe.allow.screen-wake-lock 📋Chrome7/27/2020 Safari3/27/2023973
html.elements.iframe.allowfullscreen 📋Chrome10/7/2014 Safari3/27/2017902
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.WebView on iOS: Only available on iPad, not on iPhone.WebView on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.
html.elements.iframe.frameborder 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.iframe.height 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.iframe.loading 📋Chrome9/10/2019 Safari3/27/20231294
html.elements.iframe.longdesc 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.iframe.marginheight 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.iframe.marginwidth 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.iframe.name 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.iframe.referrerpolicy 📋Chrome5/25/2016 Safari9/16/20201575
html.elements.iframe.sandbox 📋Chrome5/25/2010 Safari6/7/201013
html.elements.iframe.sandbox.allow-downloads 📋Chrome5/19/2020 Safari9/18/20231217
html.elements.iframe.sandbox.allow-forms 📋Chrome5/25/2010 Safari6/7/201013
html.elements.iframe.sandbox.allow-modals 📋Chrome10/13/2015 Safari4/12/2018912
html.elements.iframe.sandbox.allow-pointer-lock 📋Chrome11/6/2012 Safari3/27/20171602
html.elements.iframe.sandbox.allow-popups 📋Chrome2/8/2012 Safari7/25/2012168
html.elements.iframe.sandbox.allow-popups-to-escape-sandbox 📋Chrome10/13/2015 Safari4/12/2018912
html.elements.iframe.sandbox.allow-same-origin 📋Chrome5/25/2010 Safari6/7/201013
Chrome: Chrome 70 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Chrome Android: Chrome Android 70 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Edge: Edge 79 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Quest Browser: Quest Browser 6.0 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Opera: Opera 57 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Opera Android: Opera Android 49 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Safari: Safari blocks script execution without allow-scripts even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Safari on iOS: Safari blocks script execution without allow-scripts even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Samsung Internet: Samsung Internet 10.0 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.WebView Android: WebView Android 70 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.WebView on iOS: Safari blocks script execution without allow-scripts even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.
html.elements.iframe.sandbox.allow-scripts 📋Chrome5/25/2010 Safari6/7/201013
html.elements.iframe.sandbox.allow-storage-access-by-user-activation Safari4/12/2018 Chrome5/2/20231846
html.elements.iframe.sandbox.allow-top-navigation 📋Safari6/7/2010 Chrome9/2/201087
html.elements.iframe.sandbox.allow-top-navigation-by-user-activation 📋Chrome4/19/2017 Safari4/12/2018358
html.elements.iframe.scrolling 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.iframe.src 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.iframe.srcdoc 📋Chrome6/26/2012 Safari7/25/201229
html.elements.iframe.width 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.img.align 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.alt 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.aspect_ratio_computed_from_attributes Chrome12/10/2019 Safari9/20/2021650
Safari: Safari doesn't preserve space for images without a valid src, which may disrupt layouts that rely on lazy loading (see bug 224197).Safari on iOS: Safari on iOS doesn't preserve space for images without a valid src, which may disrupt layouts that rely on lazy loading (see bug 224197).WebView on iOS: WebView on iOS doesn't preserve space for images without a valid src, which may disrupt layouts that rely on lazy loading (see bug 224197).
html.elements.img.border 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.crossorigin 📋Chrome8/2/2011 Safari7/25/2012358
html.elements.img.decoding 📋Chrome3/6/2018 Safari4/12/201837
html.elements.img.fetchpriority 📋Chrome4/26/2022 Safari12/11/2023594
html.elements.img.height 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.hspace 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.ismap 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.loading 📋Chrome9/10/2019 Safari3/14/2022916
html.elements.img.longdesc 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.name 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.referrerpolicy 📋Chrome5/25/2016 Safari9/16/20201575
html.elements.img.sizes 📋Chrome10/7/2014 Safari3/21/2016531
html.elements.img.src 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.img.srcset 📋Chrome4/8/2014 Safari10/16/2014191
html.elements.img.usemap 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.usemap.case_sensitive Chrome4/19/2017 Safari9/19/2017153
html.elements.img.vspace 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.img.width 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.input 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: Before Firefox 89, manipulating the content of <input> elements using Document.execCommand() commands requires workarounds (see bug 1220696).Firefox for Android: Before Firefox for Android 89, manipulating the content of <input> elements using Document.execCommand() commands requires workarounds (see bug 1220696).
html.elements.input.accept 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.align 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.alt 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.autocomplete 📋Chrome9/16/2011 Safari7/25/2012313
html.elements.input.checked 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.dirname 📋Chrome2/8/2012 Safari7/25/2012168
html.elements.input.disabled 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.form 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.formaction 📋Safari6/7/2010 Chrome2/3/2011241
html.elements.input.formenctype 📋Safari6/7/2010 Chrome2/3/2011241
html.elements.input.formmethod 📋Safari6/7/2010 Chrome2/3/2011241
html.elements.input.formnovalidate 📋Chrome1/25/2010 Safari6/7/2010133
html.elements.input.formtarget 📋Safari6/7/2010 Chrome2/3/2011241
html.elements.input.list 📋Chrome6/26/2012 Safari3/25/20192463
html.elements.input.max 📋Chrome1/25/2010 Safari6/7/2010133
html.elements.input.maxlength 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.min 📋Chrome1/25/2010 Safari6/7/2010133
html.elements.input.minlength 📋Chrome1/21/2015 Safari3/27/2017796
html.elements.input.multiple 📋Chrome5/21/2009 Safari6/8/200918
html.elements.input.name 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.pattern 📋Chrome1/25/2010 Safari6/7/2010133
html.elements.input.placeholder 📋Safari6/8/2009 Chrome9/15/200999
html.elements.input.popovertarget 📋Chrome5/30/2023 Safari9/18/2023111
html.elements.input.popovertargetaction 📋Chrome5/30/2023 Safari9/18/2023111
html.elements.input.readonly 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.required 📋Chrome1/25/2010 Safari6/7/2010133
html.elements.input.size 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.src 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.step 📋Chrome5/25/2010 Safari6/7/201013
html.elements.input.type_button 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.type_checkbox 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.type_color 📋Chrome6/26/2012 Safari3/25/20192463
Firefox for Android: Firefox for Android doesn't allow the user to choose a custom color, only one of the predefined ones.
html.elements.input.type_date 📋Chrome6/26/2012 Safari4/26/20213226
html.elements.input.type_datetime-local 📋Chrome6/26/2012 Safari4/26/20213226
Firefox: Firefox only displays a date picker and does not display a time picker, see bug 1726108.Safari: Safari only displays a date picker and does not display a time picker.
html.elements.input.type_email 📋Chrome5/25/2010 Safari6/7/201013
Safari on iOS: Doesn't do validation, but instead offers a custom 'email' keyboard, which is designed to make entering email addresses easier.Safari on iOS: The custom 'email' keyboard does not provide a comma key, so users cannot enter multiple email addresses.Safari on iOS: Automatically applies a default style of opacity: 0.4 to disable textual <input> elements, including those of type 'email'. Other major browsers don't currently share this particular default style.WebView on iOS: Doesn't do validation, but instead offers a custom 'email' keyboard, which is designed to make entering email addresses easier.WebView on iOS: The custom 'email' keyboard does not provide a comma key, so users cannot enter multiple email addresses.WebView on iOS: Automatically applies a default style of opacity: 0.4 to disable textual <input> elements, including those of type 'email'. Other major browsers don't currently share this particular default style.
html.elements.input.type_file 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: You can set as well as get the value of HTMLInputElement.files in all modern browsers; this was most recently added to Firefox, in version 57 (see bug 1384030).
html.elements.input.type_hidden 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.type_image 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.type_number 📋Chrome10/19/2010 Safari7/20/2011274
Chrome: Prevents users from typing non-numeric content.Chrome Android: Prevents users from typing non-numeric content.Firefox: Allows users to type non-numeric content, with the value reflecting an empty string.Firefox for Android: Allows users to type non-numeric content, with the value reflecting an empty string.Quest Browser: Prevents users from typing non-numeric content.Opera: Prevents users from typing non-numeric content.Opera Android: Prevents users from typing non-numeric content.Safari: Allows users to type non-numeric content, with the value reflecting an empty string.Safari on iOS: Allows users to type non-numeric content, with the value reflecting an empty string.Samsung Internet: Prevents users from typing non-numeric content.WebView Android: Prevents users from typing non-numeric content.WebView on iOS: Allows users to type non-numeric content, with the value reflecting an empty string.
html.elements.input.type_password 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.type_radio 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.type_range 📋Safari3/18/2008 Chrome1/25/2010678
WebView Android: Pre-Chromium Android WebView recognizes the range type, but doesn't implement a range-specific control.
html.elements.input.type_range.tick_marks Chrome5/29/2018 Safari3/25/2019300
html.elements.input.type_range.vertical_orientation Safari5/18/2023 Chrome4/16/2024334
Chrome: Vertical orientation available via the writing-mode property (see Creating vertical controls).Chrome: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Chrome Android: Vertical orientation available via the writing-mode property (see Creating vertical controls).Chrome Android: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Edge: Vertical orientation available by setting the writing-mode: bt-lr style on the input element.Firefox: Vertical orientation available via the writing-mode property (see Creating vertical controls).Firefox: Supported using the non-standard orient="vertical" attribute.Firefox for Android: Vertical orientation available via the writing-mode property (see Creating vertical controls).Firefox for Android: Supported using the non-standard orient="vertical" attribute.Internet Explorer: Vertical orientation available by setting the writing-mode: bt-lr style on the input element.Quest Browser: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Opera: Vertical orientation available via the writing-mode property (see Creating vertical controls).Opera: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Opera Android: Vertical orientation available via the writing-mode property (see Creating vertical controls).Opera Android: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Safari: Vertical orientation available via the writing-mode property (see Creating vertical controls).Safari: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Safari on iOS: Vertical orientation available via the writing-mode property (see Creating vertical controls).Safari on iOS: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Samsung Internet: Vertical orientation available via the writing-mode property (see Creating vertical controls).Samsung Internet: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.WebView Android: Vertical orientation available via the writing-mode property (see Creating vertical controls).WebView Android: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.WebView on iOS: Vertical orientation available via the writing-mode property (see Creating vertical controls).WebView on iOS: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.
html.elements.input.type_reset 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: Unlike other browsers, Firefox by default persists the dynamic disabled state of a <button> across page loads. Use the autocomplete attribute to control this feature.Firefox for Android: Unlike other browsers, Firefox for Android by default persists the dynamic disabled state of a <button> across page loads. Use the autocomplete attribute to control this feature.
html.elements.input.type_search 📋Chrome5/25/2010 Safari6/7/201013
html.elements.input.type_submit 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: Unlike other browsers, Firefox by default persists the dynamic disabled state of a <button> across page loads. Use the autocomplete attribute to control this feature.Firefox for Android: Unlike other browsers, Firefox for Android by default persists the dynamic disabled state of a <button> across page loads. Use the autocomplete attribute to control this feature.
html.elements.input.type_tel 📋Safari6/8/2009 Chrome9/15/200999
Chrome: The field type doesn't demonstrate any special behavior.Safari: The field type doesn't demonstrate any special behavior.
html.elements.input.type_text 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.type_time 📋Chrome6/26/2012 Safari4/26/20213226
html.elements.input.type_url 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.usemap 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.input.webkitdirectory Chrome10/19/2010 Safari4/12/20182732
Chrome Android: In Chrome for Android 131, choosing a directory crashes the browser (see bug 376834374).Chrome Android: Before version 131, users cannot choose a directory, only individual files (see bug 40248532.Opera Android: In Chrome for Android 131, choosing a directory crashes the browser (see bug 376834374).Opera Android: Before version 87, users cannot choose a directory, only individual files (see bug 40248532.Safari on iOS: The attribute can be set but users cannot choose a directory, only individual files (see bug 271705).WebView Android: In Chrome for Android 131, choosing a directory crashes the browser (see bug 376834374).WebView Android: Before version 131, users cannot choose a directory, only individual files (see bug 40248532.WebView on iOS: The attribute can be set but users cannot choose a directory, only individual files (see bug 271705).
html.elements.ins 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.ins.cite Safari10/26/2007 Chrome12/11/2008412
html.elements.ins.datetime Safari10/26/2007 Chrome12/11/2008412
html.elements.kbd 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 4, creating a <kbd> element incorrectly resulted in an HTMLSpanElement object, instead of the expected HTMLElement.
html.elements.label 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.label.for 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.legend 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.legend.align Chrome12/11/2008 Safari6/8/2009179
html.elements.li 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.li.type 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.li.value 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.link 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.link.as 📋Chrome4/13/2016 Safari9/20/2016160
html.elements.link.blocking 📋Chrome9/2/2022 Safari12/11/2024831
html.elements.link.charset 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.link.crossorigin 📋Chrome4/8/2014 Safari9/20/2016896
Firefox: Before Firefox 83, crossorigin is not supported for rel="icon".Firefox for Android: Before Firefox for Android 83, crossorigin is not supported for rel="icon".
html.elements.link.disabled 📋Chrome12/11/2008 Safari6/8/2009179
Chrome: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Chrome Android: In Chrome Android and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Edge: Since Edge 79, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Quest Browser: In Quest Browser and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Opera: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Opera Android: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Samsung Internet: In Samsung Internet and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.WebView Android: In WebView Android and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.
html.elements.link.fetchpriority 📋Chrome4/26/2022 Safari12/11/2023594
html.elements.link.href 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.link.hreflang 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.link.imagesizes 📋Chrome3/12/2019 Safari12/11/20231735
html.elements.link.imagesrcset 📋Chrome3/12/2019 Safari12/11/20231735
html.elements.link.integrity 📋Chrome9/1/2015 Safari4/12/2018954
html.elements.link.media 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.link.referrerpolicy 📋Chrome5/25/2016 Safari9/16/20201575
html.elements.link.rel 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.link.rel.dns-prefetch 📋Safari6/7/2010 Chrome10/13/20151954
Firefox: Only HTTP pages were supported.Firefox for Android: Only HTTP pages were supported.
html.elements.link.rel.icon Safari3/18/2008 Chrome1/25/2010678
Chrome: If both ICO and PNG are available, will use ICO over PNG if ICO has better matching sizes set. (Per caniuse.com.).Edge: In version 79 and later (Blink-based Edge), if both ICO and PNG are available, will use ICO over PNG if ICO has better matching sizes set. (Per caniuse.com.)Firefox: Before Firefox 83, the crossorigin attribute is not supported for rel="icon".Firefox: The media attribute is not supported for rel="icon", see bug 1603885.Opera: In version 15 and later (Blink-based Opera), if both ICO and PNG are available, will use ICO over PNG if ICO has better matching sizes set. (Per caniuse.com.)Safari: If both ICO and PNG are available, will ALWAYS use ICO file, regardless of sizes set. (Per caniuse.com.)Safari on iOS: Does not use favicons at all (but may have alternative for bookmarks, etc.). (Per caniuse.com.)WebView on iOS: Does not use favicons at all (but may have alternative for bookmarks, etc.). (Per caniuse.com.)
html.elements.link.rel.manifest 📋Chrome11/18/2014 Safari9/18/20233226
html.elements.link.rel.modulepreload 📋Chrome4/17/2018 Safari9/18/20231980
html.elements.link.rel.preconnect 📋Chrome10/13/2015 Safari4/12/2018912
Firefox: Before Firefox 41, it doesn't obey the crossorigin attribute.Firefox for Android: Before Firefox for Android 41, it doesn't obey the crossorigin attribute.
html.elements.link.rel.prefetch 📋Chrome12/2/2010 Safari3/24/20203400
Chrome: Requires secure contextChrome Android: Requires secure contextEdge: Requires secure contextFirefox: Requires secure contextFirefox for Android: Requires secure contextQuest Browser: Requires secure contextOpera: Requires secure contextOpera Android: Requires secure contextSamsung Internet: Requires secure contextWebView Android: Requires secure context
html.elements.link.rel.preload 📋Chrome4/13/2016 Safari4/12/2018729
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-fetch Chrome4/13/2016 Safari4/12/2018729
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-font Chrome4/13/2016 Safari4/12/2018729
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-image Chrome4/13/2016 Safari4/12/2018729
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-script Chrome4/13/2016 Safari4/12/2018729
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-style Chrome4/13/2016 Safari4/12/2018729
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-track Chrome4/13/2016 Safari4/12/2018729
html.elements.link.rev 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.link.sizes 📋Safari7/25/2012 Chrome2/4/20202750
html.elements.link.target 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.link.type 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.main 📋Chrome3/26/2013 Safari10/22/2013210
html.elements.map 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: Before Firefox 5, in Quirks Mode, empty maps were no longer skipped over in favor of non-empty ones when matching.Firefox: Before Firefox 17, the default styling of the <map> HTML element was display: block;. This is now display: inline; and matches the behavior of the other browsers. It was already the case in Quirks Mode.
html.elements.map.name Safari6/23/2003 Chrome12/11/20081998
html.elements.mark 📋Chrome10/19/2010 Safari7/20/2011274
html.elements.marquee 📋Safari2/2/2004 Chrome12/11/20081774
Firefox: Implements the HTMLDivElement interface.Firefox for Android: Implements the HTMLDivElement interface.
html.elements.marquee.behavior Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.bgcolor Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.direction Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.height Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.hspace Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.loop Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.scrollamount Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.scrolldelay Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.truespeed Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.vspace Safari2/2/2004 Chrome12/11/20081774
html.elements.marquee.width Safari2/2/2004 Chrome12/11/20081774
html.elements.menu 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.meta 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.meta.charset 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.meta.content 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.meta.http-equiv 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.meta.http-equiv.content-language 📋Safari3/27/2017 Chrome6/5/201770
html.elements.meta.http-equiv.content-security-policy 📋Safari3/27/2017 Chrome6/5/201770
html.elements.meta.http-equiv.content-type 📋Safari3/27/2017 Chrome6/5/201770
html.elements.meta.http-equiv.refresh 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.meta.name 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.meta.name.color-scheme 📋Safari3/25/2019 Chrome4/7/2020379
html.elements.meta.name.referrer 📋Chrome2/8/2012 Safari4/12/20182255
Chrome: Until Chrome 46, content values weren't constrained to the values listed in the spec.Chrome Android: Until Chrome Android 46, content values weren't constrained to the values listed in the spec.Firefox: The referrer value wasn't taken into account when navigation was happening via the context menu or middle click until Firefox 39.Firefox for Android: The referrer value wasn't taken into account when navigation was happening via the context menu or middle click until Firefox for Android 39.Internet Explorer: Browsers initially supported an early draft of the specification which can only use a meta tag and is only compatible with the origin value from the new spec.Quest Browser: Until Quest Browser 5.0, content values weren't constrained to the values listed in the spec.Opera: Until Opera 33, content values weren't constrained to the values listed in the spec.Opera Android: Until Opera Android 33, content values weren't constrained to the values listed in the spec.Samsung Internet: Until Samsung Internet 5.0, content values weren't constrained to the values listed in the spec.WebView Android: Until WebView Android 46, content values weren't constrained to the values listed in the spec.
html.elements.meta.name.theme-color 📋Chrome3/12/2019 Safari9/20/2021923
Chrome: Chrome uses the color only on installed progressive web apps.Chrome: Chrome reports support, but does not actually use the color anywhere.Chrome Android: Chrome for Android does not use the color on devices with native dark mode enabled unless it's an installed progressive web app or a trusted web activity.Edge: Edge uses the color only on installed progressive web apps.Quest Browser: Chrome for Android does not use the color on devices with native dark mode enabled unless it's an installed progressive web app or a trusted web activity.
html.elements.meta.scheme 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.meter 📋Chrome9/2/2010 Safari7/25/2012692
html.elements.meter.high 📋Chrome9/2/2010 Safari7/25/2012692
html.elements.meter.low 📋Chrome9/2/2010 Safari7/25/2012692
html.elements.meter.max 📋Chrome9/2/2010 Safari7/25/2012692
html.elements.meter.min 📋Chrome9/2/2010 Safari7/25/2012692
html.elements.meter.optimum 📋Chrome9/2/2010 Safari7/25/2012692
html.elements.meter.value 📋Chrome9/2/2010 Safari7/25/2012692
html.elements.nav 📋Chrome5/25/2010 Safari6/7/201013
html.elements.nobr 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.noembed 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.noframes 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.noscript 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.archive 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.border 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.classid 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.codebase 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.codetype 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.data 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.declare 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.form 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.height 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.name 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.standby 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.type 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.usemap 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.object.width 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.ol 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.ol.compact Safari10/26/2007 Chrome12/11/2008412
html.elements.ol.reversed 📋Chrome3/28/2012 Safari7/25/2012119
html.elements.ol.start 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.ol.type 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.optgroup 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.optgroup.disabled 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.optgroup.label 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.option 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.option.disabled 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.option.label 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before 77, Firefox didn't display the value of the label attribute as option text if element's content was empty. See bug 40545.Firefox: Historically, Firefox has allowed keyboard and mouse events to bubble up from the <option> element to the parent <select> element, although this behavior is inconsistent across many browsers. For better Web compatibility (and for technical reasons), they will not bubble up when Firefox is in multi-process mode and the <select> element is displayed as a drop-down list. The behavior is unchanged if the <select> is presented inline and it has either the multiple attribute defined or a size attribute set to more than 1. Rather than watching <option> elements for events, you should watch for change events on <select>. See bug 1090602 for details.Firefox: When Mozilla introduced dedicated content threads to Firefox (through the Electrolysis, or e10s, project), support for styling <option> elements was removed temporarily. Starting in Firefox 54, you can apply foreground and background colors to <option> elements again, using the color and background-color CSS properties. See bug 910022 for more information. Note that this is still disabled in Linux due to lack of contrast (see bug 1338283 for progress on this).Firefox for Android: Before 77, Firefox didn't display the value of the label attribute as option text if element's content was empty. See bug 40545.
html.elements.option.selected 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.option.value 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.output 📋Chrome3/8/2011 Safari10/22/2013959
html.elements.output.for 📋Chrome3/8/2011 Safari10/22/2013959
html.elements.output.form 📋Chrome3/8/2011 Safari10/22/2013959
html.elements.output.name 📋Chrome3/8/2011 Safari10/22/2013959
html.elements.p 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.param 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.param.name Chrome12/11/2008 Safari6/8/2009179
html.elements.param.type Chrome12/11/2008 Safari6/8/2009179
html.elements.param.value Chrome12/11/2008 Safari6/8/2009179
html.elements.param.valuetype Chrome12/11/2008 Safari6/8/2009179
html.elements.picture 📋Chrome10/7/2014 Safari3/21/2016531
html.elements.plaintext 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.pre 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.pre.width Safari10/26/2007 Chrome12/11/2008412
Chrome: Specifying the width attribute has no layout effect.Chrome Android: Specifying the width attribute has no layout effect.Edge: Specifying the width attribute has no layout effect.Firefox: Since Firefox 29, specifying the width attribute has no layout effect.Firefox for Android: Since Firefox for Android 29, specifying the width attribute has no layout effect.Internet Explorer: Specifying the width attribute has no layout effect.Quest Browser: Specifying the width attribute has no layout effect.Opera: Specifying the width attribute has no layout effect.Opera Android: Specifying the width attribute has no layout effect.Safari: Specifying the width attribute has no layout effect.Safari on iOS: Specifying the width attribute has no layout effect.Samsung Internet: Specifying the width attribute has no layout effect.WebView Android: Specifying the width attribute has no layout effect.
html.elements.progress 📋Chrome9/2/2010 Safari7/25/2012692
Firefox: Before Firefox 14, the <progress> element was incorrectly classified as a form element, and therefore had a form attribute. This has been fixed.Firefox: Firefox provides the ::-moz-progress-bar pseudo-element, which lets you style the part of the interior of the progress bar representing the amount of work completed so far.Firefox for Android: Before Firefox for Android 14, the <progress> element was incorrectly classified as a form element, and therefore had a form attribute. This has been fixed.Firefox for Android: Firefox for Android provides the ::-moz-progress-bar pseudo-element, which lets you style the part of the interior of the progress bar representing the amount of work completed so far.Safari on iOS: Safari on iOS does not support indeterminate progress bars (they are rendered like 0%-completed progress bars).WebView on iOS: WebView on iOS does not support indeterminate progress bars (they are rendered like 0%-completed progress bars).
html.elements.progress.max 📋Chrome9/2/2010 Safari7/25/2012692
html.elements.progress.value 📋Chrome9/2/2010 Safari7/25/2012692
html.elements.q 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.q.cite 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.rb 📋Chrome5/25/2010 Safari6/7/201013
Chrome: Blink has support for parsing the rb element, but not for rendering rb content as expected.Chrome Android: Blink has support for parsing the rb element, but not for rendering rb content as expected.Edge: Blink has support for parsing the rb element, but not for rendering rb content as expected.Quest Browser: Blink has support for parsing the rb element, but not for rendering rb content as expected.Opera: Blink has support for parsing the rb element, but not for rendering rb content as expected.Opera Android: Blink has support for parsing the rb element, but not for rendering rb content as expected.Safari: Safari has support for parsing the rb element, but not for rendering rb content as expected.Safari on iOS: Safari on iOS has support for parsing the rb element, but not for rendering rb content as expected.Samsung Internet: Blink has support for parsing the rb element, but not for rendering rb content as expected.WebView Android: Blink has support for parsing the rb element, but not for rendering rb content as expected.WebView on iOS: WebView on iOS has support for parsing the rb element, but not for rendering rb content as expected.
html.elements.rp 📋Chrome5/25/2010 Safari6/7/201013
html.elements.rt 📋Chrome5/25/2010 Safari6/7/201013
html.elements.rtc 📋Chrome2/4/2020 Safari3/24/202049
html.elements.ruby 📋Chrome5/25/2010 Safari6/7/201013
html.elements.s 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.samp 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.script 📋Safari10/26/2007 Chrome12/11/2008412
Firefox: Starting in Firefox 4, inserting <script> elements that have been created by calling document.createElement("script") no longer enforces execution in insertion order. This change lets Firefox properly abide by the specification. To make script-inserted external scripts execute in their insertion order, set .async=false on them.
html.elements.script.async 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.script.blocking 📋Chrome9/2/2022 Safari12/11/2024831
html.elements.script.crossorigin 📋Chrome5/15/2012 Safari7/25/201271
Safari: The crossorigin attribute was implemented in WebKit in WebKit bug 81438.Safari on iOS: The crossorigin attribute was implemented in WebKit in WebKit bug 81438.WebView on iOS: The crossorigin attribute was implemented in WebKit in WebKit bug 81438.
html.elements.script.defer 📋Safari10/26/2007 Chrome12/11/2008412
Chrome: Chrome does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Chrome Android: Chrome Android does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Firefox: Since Firefox 3.6, the defer attribute is ignored on scripts that don't have the src attribute. However, in Firefox 3.5 even inline scripts are deferred if the defer attribute is set.Internet Explorer: Before version 10, Internet Explorer implemented defer by a proprietary specification. Since version 10 it conforms to the W3C specification.Quest Browser: Quest Browser does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Opera: Opera does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Opera Android: Opera Android does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Samsung Internet: Samsung Internet does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348WebView Android: WebView Android does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348
html.elements.script.fetchpriority 📋Chrome4/26/2022 Safari12/11/2023594
html.elements.script.integrity 📋Chrome9/1/2015 Safari4/12/2018954
html.elements.script.nomodule 📋Chrome9/5/2017 Safari9/19/201714
html.elements.script.referrerpolicy 📋Chrome10/16/2018 Safari9/16/2020701
html.elements.script.src 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.script.type 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.script.type.importmap 📋Chrome3/2/2021 Safari3/27/2023755
html.elements.script.type.importmap.integrity 📋Chrome7/23/2024 Safari9/16/202455
html.elements.script.type.module Safari3/27/2017 Chrome9/5/2017162
Chrome: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Chrome Android: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Edge: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Quest Browser: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Opera: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Opera Android: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Safari: Module scripts do not load when the page is served as XHTML (application/xhtml+xml).Safari on iOS: Module scripts do not load when the page is served as XHTML (application/xhtml+xml).Samsung Internet: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.WebView Android: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.WebView on iOS: Module scripts do not load when the page is served as XHTML (application/xhtml+xml).
html.elements.search 📋Safari9/18/2023 Chrome10/10/202322
html.elements.section 📋Chrome5/25/2010 Safari6/7/201013
html.elements.select 📋Safari6/23/2003 Chrome12/11/20081998
Chrome: border-radius on <select> elements is ignored unless -webkit-appearance is overridden to an appropriate value.Chrome Android: border-radius on <select> elements is ignored unless -webkit-appearance is overridden to an appropriate value.Firefox: Historically, Firefox has allowed keyboard and mouse events to bubble up from the <option> element to the parent <select> element, although this behavior is inconsistent across many browsers. For better Web compatibility (and for technical reasons), when Firefox is in multi-process mode the <select> element is displayed as a drop-down list. The behavior is unchanged if the <select> is presented inline and it has either the multiple attribute defined or a size attribute set to more than 1. Rather than watching <option> elements for events, you should watch for change events on <select>. See bug 1090602 for details.Firefox for Android: Firefox for Android, by default, sets a background-image gradient on all <select multiple> elements. This can be disabled using background-image: none.Quest Browser: border-radius on <select> elements is ignored unless -webkit-appearance is overridden to an appropriate value.Safari: border-radius on <select> elements is ignored unless -webkit-appearance is overridden to an appropriate value.Safari on iOS: border-radius on <select> elements is ignored unless -webkit-appearance is overridden to an appropriate value.Samsung Internet: border-radius on <select> elements is ignored unless -webkit-appearance is overridden to an appropriate value.WebView Android: In the Browser app for Android 4.1 (and possibly later versions), there is a bug where the menu indicator triangle on the side of a <select> will not be displayed if a background, border, or border-radius style is applied to the <select>.WebView Android: border-radius on <select> elements is ignored unless -webkit-appearance is overridden to an appropriate value.WebView on iOS: border-radius on <select> elements is ignored unless -webkit-appearance is overridden to an appropriate value.
html.elements.select.autocomplete 📋Safari3/21/2016 Chrome4/17/2018757
html.elements.select.disabled 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.select.form 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.select.hr_in_select Safari9/18/2023 Chrome10/31/202343
Chrome: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Chrome: Does not expose the <hr> within the accessibility tree.Edge: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Edge: Does not expose the <hr> within the accessibility tree.Firefox: Does not expose the <hr> within the accessibility tree.Firefox for Android: Does not expose the <hr> within the accessibility tree.Opera: Only exposes the <hr> visually in the page when the menu is expanded (arrowing within the collapsed menu does not show them).Opera: Does not expose the <hr> within the accessibility tree.Safari: Does not expose the <hr> within the accessibility tree.Safari on iOS: Does not expose the <hr> within the accessibility tree.WebView on iOS: Does not expose the <hr> within the accessibility tree.
html.elements.select.multiple 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.select.name 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.select.required 📋Chrome3/8/2011 Safari7/20/2011134
html.elements.select.size 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.slot 📋Chrome8/31/2016 Safari9/20/201620
html.elements.slot.name Chrome8/31/2016 Safari9/20/201620
html.elements.small 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.source 📋Safari3/18/2008 Chrome9/15/2009546
Firefox: Until Firefox 15, Firefox picked the first source element that has a type matching the MIME-type of a supported media format; see bug 449363 for details.Firefox for Android: Until Firefox for Android 15, Firefox for Android picked the first source element that has a type matching the MIME-type of a supported media format; see bug 449363 for details.
html.elements.source.height 📋Chrome4/13/2021 Safari9/20/2021160
html.elements.source.media 📋Safari3/18/2008 Chrome9/15/2009546
Firefox: media is supported in <source> within <picture>, <audio>, and <video>. In Firefox 53-119, media is supported only in <source> within <picture>.Firefox for Android: media is supported in <source> within <picture>, <audio>, and <video>. In Firefox for Android 53-119, media is supported only in <source> within <picture>.
html.elements.source.sizes 📋Chrome10/7/2014 Safari3/21/2016531
Chrome: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Chrome Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Opera: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Opera Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Samsung Internet: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).WebView Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).
html.elements.source.src 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.source.srcset 📋Chrome10/7/2014 Safari3/21/2016531
Chrome: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Chrome Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Opera: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Opera Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Samsung Internet: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).WebView Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).
html.elements.source.type 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.source.width 📋Chrome4/13/2021 Safari9/20/2021160
html.elements.span 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.strike 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.Firefox for Android: Before Firefox for Android 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.strong 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 4, creating a <strong> element incorrectly resulted in an HTMLSpanElement object, instead of the expected HTMLElement.
html.elements.style 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.style.blocking 📋Chrome9/2/2022 Safari12/11/2024831
html.elements.style.media 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.style.type 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: Before 75, Firefox accepted any CSS media (MIME) type, with optional parameters. Starting in 75, this has been restricted to the string 'text/css', per the spec.
html.elements.sub 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.summary 📋Chrome6/7/2011 Safari7/25/2012414
html.elements.sup 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.table 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.table.align Safari6/23/2003 Chrome12/11/20081998
html.elements.table.bgcolor Safari6/23/2003 Chrome12/11/20081998
html.elements.table.border Safari6/23/2003 Chrome12/11/20081998
html.elements.table.cellpadding Safari6/23/2003 Chrome12/11/20081998
html.elements.table.cellspacing Safari6/23/2003 Chrome12/11/20081998
html.elements.table.frame Safari6/23/2003 Chrome12/11/20081998
html.elements.table.rules Safari6/23/2003 Chrome12/11/20081998
html.elements.table.summary Safari6/23/2003 Chrome12/11/20081998
html.elements.table.width Safari6/23/2003 Chrome12/11/20081998
html.elements.tbody 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.tbody.align Safari10/26/2007 Chrome12/11/2008412
html.elements.tbody.bgcolor Safari6/23/2003 Chrome12/11/20081998
html.elements.tbody.char Chrome12/11/2008 Safari6/8/2009179
html.elements.tbody.charoff Chrome12/11/2008 Safari6/8/2009179
html.elements.tbody.valign Safari10/26/2007 Chrome12/11/2008412
html.elements.td 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.td.abbr Safari6/23/2003 Chrome12/11/20081998
html.elements.td.align Safari10/26/2007 Chrome12/11/2008412
html.elements.td.axis Safari6/23/2003 Chrome12/11/20081998
html.elements.td.bgcolor Safari6/23/2003 Chrome12/11/20081998
html.elements.td.char Chrome12/11/2008 Safari6/8/2009179
html.elements.td.charoff Chrome12/11/2008 Safari6/8/2009179
html.elements.td.colspan Safari6/23/2003 Chrome12/11/20081998
html.elements.td.headers Safari6/23/2003 Chrome12/11/20081998
html.elements.td.rowspan Safari6/23/2003 Chrome12/11/20081998
html.elements.td.scope Safari6/23/2003 Chrome12/11/20081998
html.elements.td.valign Safari10/26/2007 Chrome12/11/2008412
html.elements.td.width Safari6/23/2003 Chrome12/11/20081998
html.elements.template 📋Chrome3/26/2013 Safari10/16/2014569
html.elements.template.shadowrootmode 📋Chrome3/7/2023 Safari3/27/202320
html.elements.textarea 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 6, when a <textarea> was focused, the insertion point was placed at the end of the text by default. Other major browsers place the insertion point at the beginning of the text.Firefox: A default background-image gradient is applied to all <textarea> elements, which can be disabled using background-image: none.Firefox: Before Firefox 89, manipulating the content of <textarea> elements using Document.execCommand() commands requires workarounds (see bug 1220696).Firefox for Android: Before Firefox for Android 6, when a <textarea> was focused, the insertion point was placed at the end of the text by default. Other major browsers place the insertion point at the beginning of the text.Firefox for Android: A default background-image gradient is applied to all <textarea> elements, which can be disabled using background-image: none.Firefox for Android: Before Firefox for Android 89, manipulating the content of <textarea> elements using Document.execCommand() commands requires workarounds (see bug 1220696).Safari on iOS: Unlike other major browsers, a default style of opacity: 0.4 is applied to disabled <textarea> elements.WebView on iOS: Unlike other major browsers, a default style of opacity: 0.4 is applied to disabled <textarea> elements.
html.elements.textarea.autocomplete 📋Safari3/21/2016 Chrome4/17/2018757
html.elements.textarea.autocomplete.one-time-code Safari9/17/2018 Chrome8/31/20211079
html.elements.textarea.cols 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.textarea.dirname 📋Chrome2/8/2012 Safari7/25/2012168
html.elements.textarea.disabled 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.textarea.form 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.textarea.maxlength 📋Chrome1/25/2010 Safari6/7/2010133
Safari: Before Safari 17, newline characters counted as two characters instead of one. See bug 249916.Safari on iOS: Before Safari on iOS 17, newline characters counted as two characters instead of one. See bug 249916.WebView on iOS: Before WebView on iOS 17, newline characters counted as two characters instead of one. See bug 249916.
html.elements.textarea.minlength 📋Chrome1/21/2015 Safari3/27/2017796
html.elements.textarea.name 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.textarea.placeholder 📋Chrome1/25/2010 Safari6/7/2010133
html.elements.textarea.placeholder.line_breaks Chrome7/16/2014 Safari9/12/20222980
html.elements.textarea.readonly 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.textarea.required 📋Chrome1/25/2010 Safari6/7/2010133
html.elements.textarea.rows 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.textarea.spellcheck Chrome2/3/2011 Safari7/20/2011167
html.elements.textarea.wrap 📋Chrome12/13/2011 Safari7/25/2012225
html.elements.tfoot 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.tfoot.align Safari10/26/2007 Chrome12/11/2008412
html.elements.tfoot.bgcolor Safari6/23/2003 Chrome12/11/20081998
html.elements.tfoot.char Chrome12/11/2008 Safari6/8/2009179
html.elements.tfoot.charoff Chrome12/11/2008 Safari6/8/2009179
html.elements.tfoot.valign Safari10/26/2007 Chrome12/11/2008412
html.elements.th 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.th.abbr Safari6/23/2003 Chrome12/11/20081998
html.elements.th.align Safari10/26/2007 Chrome12/11/2008412
html.elements.th.axis Safari6/23/2003 Chrome12/11/20081998
html.elements.th.bgcolor Safari6/23/2003 Chrome12/11/20081998
html.elements.th.char Chrome12/11/2008 Safari6/8/2009179
html.elements.th.charoff Chrome12/11/2008 Safari6/8/2009179
html.elements.th.colspan Safari6/23/2003 Chrome12/11/20081998
html.elements.th.headers Safari6/23/2003 Chrome12/11/20081998
html.elements.th.rowspan Safari6/23/2003 Chrome12/11/20081998
html.elements.th.scope Safari6/23/2003 Chrome12/11/20081998
html.elements.th.valign Safari10/26/2007 Chrome12/11/2008412
html.elements.th.width Safari6/23/2003 Chrome12/11/20081998
html.elements.thead 📋Safari6/23/2003 Chrome12/11/20081998
Safari: Backgrounds applied to <thead> elements will be applied to each table cell, rather than the entire header. To mimic the behavior of other browsers, set the background-attachment CSS property to fixed.Safari on iOS: Backgrounds applied to <thead> elements will be applied to each table cell, rather than the entire header. To mimic the behavior of other browsers, set the background-attachment CSS property to fixed.WebView on iOS: Backgrounds applied to <thead> elements will be applied to each table cell, rather than the entire header. To mimic the behavior of other browsers, set the background-attachment CSS property to fixed.
html.elements.thead.align Safari10/26/2007 Chrome12/11/2008412
html.elements.thead.bgcolor Safari6/23/2003 Chrome12/11/20081998
html.elements.thead.char Chrome12/11/2008 Safari6/8/2009179
html.elements.thead.charoff Chrome12/11/2008 Safari6/8/2009179
html.elements.thead.valign Safari10/26/2007 Chrome12/11/2008412
html.elements.time 📋Safari10/22/2013 Chrome10/17/20171456
html.elements.time.datetime Safari10/22/2013 Chrome10/17/20171456
html.elements.title 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.tr 📋Safari6/23/2003 Chrome12/11/20081998
html.elements.tr.align Safari10/26/2007 Chrome12/11/2008412
html.elements.tr.bgcolor Safari6/23/2003 Chrome12/11/20081998
html.elements.tr.char Chrome12/11/2008 Safari6/8/2009179
html.elements.tr.charoff Chrome12/11/2008 Safari6/8/2009179
html.elements.tr.valign Safari10/26/2007 Chrome12/11/2008412
html.elements.track 📋Safari7/25/2012 Chrome11/6/2012104
Chrome Android: Doesn't work for fullscreen video.Quest Browser: Doesn't work for fullscreen video.Samsung Internet: Doesn't work for fullscreen video.WebView Android: Doesn't work for fullscreen video.
html.elements.track.default 📋Safari7/25/2012 Chrome11/6/2012104
html.elements.track.kind 📋Safari7/25/2012 Chrome11/6/2012104
html.elements.track.label 📋Safari7/25/2012 Chrome11/6/2012104
html.elements.track.src 📋Safari7/25/2012 Chrome11/6/2012104
Firefox: Before Firefox 50, setting the src didn't work, though it didn't raise an error.Firefox for Android: Before Firefox for Android 50, setting the src didn't work, though it didn't raise an error.
html.elements.track.srclang 📋Safari7/25/2012 Chrome11/6/2012104
html.elements.tt 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.Firefox for Android: Before Firefox for Android 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.u 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.ul 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.ul.compact 📋Safari10/26/2007 Chrome12/11/2008412
html.elements.ul.type 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.var 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.video 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.video.aspect_ratio_computed_from_attributes Chrome12/10/2019 Safari9/16/2020281
html.elements.video.autoplay 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.video.autoplay.requires_muted_audio Chrome5/29/2018 Safari9/12/20221567
Firefox for Android: Between versions 79 and 91, the default behavior was to block videos from autoplaying, regardless of whether audio was muted.
html.elements.video.controls 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.video.crossorigin 📋Chrome2/20/2014 Safari9/20/2016943
Firefox: With crossorigin="use-credentials", cookies aren't sent during seek. See bug 1532722.Firefox for Android: With crossorigin="use-credentials", cookies aren't sent during seek. See bug 1532722.
html.elements.video.disablepictureinpicture 📋Chrome9/4/2018 Safari3/24/2020567
Firefox: When this attribute is set, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.Firefox: When this attribute is set, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.Firefox for Android: When this attribute is set, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.Firefox for Android: When this attribute is set, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.
html.elements.video.disableremoteplayback 📋Safari3/24/2020 Chrome1/23/20241400
html.elements.video.height 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.video.loop 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.video.muted 📋Safari6/7/2010 Chrome10/1/20131212
html.elements.video.playsinline 📋Safari9/20/2016 Chrome6/4/2019987
html.elements.video.poster 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.video.preload 📋Safari3/18/2008 Chrome9/15/2009546
Chrome: Defaults to metadata in Chrome 64.Chrome Android: Defaults to metadata in Chrome Android 64.Quest Browser: Defaults to metadata in Quest Browser 5.0.Opera: Defaults to metadata in Opera 51.Opera Android: Defaults to metadata in Opera Android 47.Samsung Internet: Defaults to metadata in Samsung Internet 9.0.WebView Android: Defaults to metadata in WebView Android 64.
html.elements.video.src 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.video.width 📋Safari3/18/2008 Chrome9/15/2009546
html.elements.wbr 📋Chrome12/11/2008 Safari6/8/2009179
html.elements.xmp 📋Chrome12/11/2008 Safari6/8/2009179
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.Firefox for Android: Before Firefox for Android 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.global_attributes.accesskey 📋Chrome12/11/2008 Safari6/8/2009179
html.global_attributes.autofocus 📋Chrome12/10/2019 Safari3/14/2022825
Chrome: Supported for the <button>, <input>, <select>, and <textarea> elements.Chrome Android: Supported for the <button>, <input>, <select>, and <textarea> elements.Edge: Supported for the <button>, <input>, <select>, and <textarea> elements.Firefox: Supported for the <button>, <input>, <select>, and <textarea> elements.Firefox for Android: Supported for the <button>, <input>, <select>, and <textarea> elements.Internet Explorer: Supported for the <button>, <input>, <select>, and <textarea> elements.Quest Browser: Supported for the <button>, <input>, <select>, and <textarea> elements.Opera: Supported for the <button>, <input>, <select>, and <textarea> elements.Opera Android: Supported for the <button>, <input>, <select>, and <textarea> elements.Safari: Supported for the <button>, <input>, <select>, and <textarea> elements.Safari on iOS: If there's no hardware keyboard connected, then the autofocus attribute has no effect (for example, the focus event doesn't fire and the element does not match the :focus selector).Samsung Internet: Supported for the <button>, <input>, <select>, and <textarea> elements.WebView Android: Supported for the <button>, <input>, <select>, and <textarea> elements.WebView on iOS: If there's no hardware keyboard connected, then the autofocus attribute has no effect (for example, the focus event doesn't fire and the element does not match the :focus selector).
html.global_attributes.class 📋Chrome12/11/2008 Safari6/8/2009179
html.global_attributes.contenteditable 📋Chrome12/11/2008 Safari6/8/2009179
html.global_attributes.contenteditable.plaintext-only Chrome5/25/2016 Safari3/24/20201399
html.global_attributes.data_attributes 📋Chrome10/19/2010 Safari7/20/2011274
html.global_attributes.dir 📋Chrome12/11/2008 Safari6/8/2009179
html.global_attributes.draggable 📋Chrome1/25/2010 Safari6/7/2010133
html.global_attributes.enterkeyhint 📋Chrome9/10/2019 Safari3/24/2020196
html.global_attributes.exportparts 📋Chrome3/12/2019 Safari3/24/2020378
html.global_attributes.hidden 📋Chrome3/8/2011 Safari7/20/2011134
Safari: This attribute has no effect on <option> elements.Safari on iOS: This attribute has no effect on <option> elements.WebView on iOS: This attribute has no effect on <option> elements.
html.global_attributes.id 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: id is a true global attribute only since Firefox 32.Firefox for Android: id is a true global attribute only since Firefox for Android 32.
html.global_attributes.inert 📋Safari5/16/2022 Chrome5/24/20228
html.global_attributes.inputmode 📋Chrome4/17/2018 Safari3/25/2019342
Safari on iOS: Before iOS 13, inputmode="none" had no effect.WebView on iOS: Before iOS 13, inputmode="none" had no effect.
html.global_attributes.lang 📋Chrome12/11/2008 Safari6/8/2009179
html.global_attributes.nonce 📋Chrome9/5/2017 Safari3/14/20221651
html.global_attributes.nonce.nonce_hiding 📋Chrome9/5/2017 Safari5/16/20221714
html.global_attributes.part 📋Chrome3/12/2019 Safari3/24/2020378
html.global_attributes.popover 📋Chrome5/30/2023 Safari9/18/2023111
html.global_attributes.slot 📋Chrome8/31/2016 Safari9/20/201620
html.global_attributes.spellcheck 📋Chrome2/3/2011 Safari7/20/2011167
html.global_attributes.style 📋Safari6/23/2003 Chrome12/11/20081998
html.global_attributes.tabindex 📋Safari3/18/2008 Chrome12/11/2008268
html.global_attributes.title 📋Chrome12/11/2008 Safari6/8/2009179
html.global_attributes.title.multi-line_titles Safari9/19/2017 Chrome1/23/2018126
html.global_attributes.translate 📋Chrome5/15/2012 Safari7/25/201271
html.global_attributes.writingsuggestions 📋Chrome4/16/2024 Safari9/16/2024153
html.manifest.display 📋Chrome11/18/2014 Safari9/18/20233226
Chrome: display and/or display_override are required for a web app to be installable.Chrome Android: display and/or display_override are required for a web app to be installable.Edge: display and/or display_override are required for a web app to be installable.Quest Browser: display and/or display_override are required for a web app to be installable.Opera: display and/or display_override are required for a web app to be installable.Opera Android: display and/or display_override are required for a web app to be installable.Samsung Internet: display and/or display_override are required for a web app to be installable.WebView Android: display and/or display_override are required for a web app to be installable.
html.manifest.display.browser 📋Chrome11/18/2014 Safari9/18/20233226
html.manifest.display.standalone 📋Chrome11/18/2014 Safari9/18/20233226
html.manifest.icons 📋Chrome11/18/2014 Safari9/18/20233226
Chrome: icons is required for a web app to be installable.Chrome Android: icons is required for a web app to be installable.Edge: icons is required for a web app to be installable.Quest Browser: icons is required for a web app to be installable.Opera: icons is required for a web app to be installable.Opera Android: icons is required for a web app to be installable.Safari: Only used when no apple-touch-icon is present and either "purpose" is set to "any" or "purpose" is not specified.Safari on iOS: Only used when no apple-touch-icon is present and either "purpose" is set to "any" or "purpose" is not specified.Samsung Internet: icons is required for a web app to be installable.WebView Android: icons is required for a web app to be installable.WebView on iOS: Only used when no apple-touch-icon is present and either "purpose" is set to "any" or "purpose" is not specified.
html.manifest.id 📋Chrome11/15/2021 Safari9/18/2023672
Firefox: The property parses, but has no effect.
html.manifest.name 📋Chrome11/18/2014 Safari9/18/20233226
Chrome: name or short_name is required for a web app to be installable.Chrome Android: name or short_name is required for a web app to be installable.Edge: name or short_name is required for a web app to be installable.Quest Browser: name or short_name is required for a web app to be installable.Opera: name or short_name is required for a web app to be installable.Opera Android: name or short_name is required for a web app to be installable.Samsung Internet: name or short_name is required for a web app to be installable.WebView Android: name or short_name is required for a web app to be installable.
html.manifest.scope 📋Chrome8/31/2016 Safari9/18/20232574
html.manifest.short_name 📋Chrome11/18/2014 Safari9/18/20233226
Chrome: short_name or name is required for a web app to be installable.Chrome Android: short_name or name is required for a web app to be installable.Edge: short_name or name is required for a web app to be installable.Quest Browser: short_name or name is required for a web app to be installable.Opera: short_name or name is required for a web app to be installable.Opera Android: short_name or name is required for a web app to be installable.Samsung Internet: short_name or name is required for a web app to be installable.WebView Android: short_name or name is required for a web app to be installable.
html.manifest.shortcuts 📋Chrome11/15/2021 Safari3/5/2024841
Chrome: Supported on Windows only.Edge: Supported on Windows only.Opera: Supported on Windows only.
html.manifest.start_url 📋Chrome11/18/2014 Safari9/18/20233226
Chrome: start_url is required for a web app to be installable.Chrome Android: start_url is required for a web app to be installable.Edge: start_url is required for a web app to be installable.Quest Browser: start_url is required for a web app to be installable.Opera: start_url is required for a web app to be installable.Opera Android: start_url is required for a web app to be installable.Samsung Internet: start_url is required for a web app to be installable.WebView Android: start_url is required for a web app to be installable.
html.manifest.theme_color 📋Chrome10/13/2015 Safari9/18/20232897

JS Data

API First Browser Date Last Browser Date Days Notes
javascript.builtins.AggregateError 📋Chrome8/25/2020 Safari9/16/202022
javascript.builtins.AggregateError.AggregateError 📋Chrome8/25/2020 Safari9/16/202022
javascript.builtins.AggregateError.errors 📋Chrome8/25/2020 Safari9/16/202022
javascript.builtins.AggregateError.serializable_object Chrome2/1/2022 Safari9/18/2023594
Chrome: AggregateError serializes to the Error type, without additional properties.Chrome Android: AggregateError serializes to the Error type, without additional properties.Edge: AggregateError serializes to the Error type, without additional properties.Firefox: AggregateError serializes to the AggregateError type, with properties name, message, cause, and errors.Firefox for Android: AggregateError serializes to the AggregateError type, with properties name, message, cause, and errors.Quest Browser: AggregateError serializes to the Error type, without additional properties.Opera: AggregateError serializes to the Error type, without additional properties.Opera Android: AggregateError serializes to the Error type, without additional properties.Samsung Internet: AggregateError serializes to the Error type, without additional properties.WebView Android: AggregateError serializes to the Error type, without additional properties.
javascript.builtins.Array 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.@@iterator 📋Chrome10/7/2014 Safari9/20/2016714
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.Array.@@species 📋Chrome5/25/2016 Safari9/20/2016118
javascript.builtins.Array.@@unscopables 📋Chrome10/7/2014 Safari9/20/2016714
javascript.builtins.Array.Array 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.at 📋Chrome7/20/2021 Safari3/14/2022237
javascript.builtins.Array.concat 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.copyWithin 📋Chrome9/1/2015 Safari9/30/201529
javascript.builtins.Array.entries 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Array.every 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Array.fill 📋Safari10/16/2014 Chrome9/1/2015320
javascript.builtins.Array.filter 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Array.find 📋Safari10/16/2014 Chrome9/1/2015320
javascript.builtins.Array.findIndex 📋Safari10/16/2014 Chrome9/1/2015320
javascript.builtins.Array.findLast 📋Chrome1/4/2022 Safari3/14/202269
javascript.builtins.Array.findLastIndex 📋Chrome1/4/2022 Safari3/14/202269
javascript.builtins.Array.flat 📋Chrome9/4/2018 Safari9/17/201813
javascript.builtins.Array.flatMap 📋Chrome9/4/2018 Safari9/17/201813
javascript.builtins.Array.forEach 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Array.from 📋Chrome9/1/2015 Safari9/30/201529
javascript.builtins.Array.fromAsync 📋Safari3/27/2023 Chrome1/23/2024302
javascript.builtins.Array.includes 📋Safari9/30/2015 Chrome12/1/201562
javascript.builtins.Array.indexOf 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Array.isArray 📋Chrome1/25/2010 Safari6/7/2010133
javascript.builtins.Array.join 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.keys 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Array.lastIndexOf 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Array.length 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.map 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Array.of 📋Chrome9/1/2015 Safari9/30/201529
javascript.builtins.Array.pop 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.push 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.reduce 📋Safari6/8/2009 Chrome9/15/200999
javascript.builtins.Array.reduceRight 📋Safari6/8/2009 Chrome9/15/200999
javascript.builtins.Array.reverse 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.shift 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.slice 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.some 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Array.sort 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.sort.stable_sorting Safari3/27/2017 Chrome10/16/2018568
javascript.builtins.Array.splice 📋Safari6/23/2003 Chrome12/11/20081998
Internet Explorer: From Internet Explorer 5.5 through 8, all elements of the array will not be deleted if deleteCount is omitted. This behavior was fixed in Internet Explorer 9.
javascript.builtins.Array.toLocaleString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.toLocaleString.locales_parameter Chrome1/10/2013 Safari10/22/2013285
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Array.toLocaleString.options_parameter Chrome1/10/2013 Safari10/22/2013285
javascript.builtins.Array.toReversed 📋Safari9/12/2022 Chrome2/7/2023148
javascript.builtins.Array.toSorted 📋Safari9/12/2022 Chrome2/7/2023148
javascript.builtins.Array.toSpliced 📋Safari9/12/2022 Chrome2/7/2023148
javascript.builtins.Array.toString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.unshift 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Array.values 📋Safari9/30/2015 Chrome4/17/2018930
javascript.builtins.Array.with 📋Safari9/12/2022 Chrome2/7/2023148
javascript.builtins.ArrayBuffer 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.ArrayBuffer.@@species 📋Chrome5/25/2016 Safari9/20/2016118
javascript.builtins.ArrayBuffer.ArrayBuffer 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.ArrayBuffer.ArrayBuffer.maxByteLength_option 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.ArrayBuffer.byteLength 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.ArrayBuffer.detached 📋Chrome5/30/2023 Safari3/5/2024280
javascript.builtins.ArrayBuffer.isView 📋Safari10/22/2013 Chrome1/14/201484
javascript.builtins.ArrayBuffer.maxByteLength 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.ArrayBuffer.resizable 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.ArrayBuffer.resize 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.ArrayBuffer.slice 📋Safari7/20/2011 Chrome2/8/2012203
Firefox: The non-standard ArrayBuffer.slice() method has been removed in Firefox 53 (but the standardized version ArrayBuffer.prototype.slice() is kept.Firefox for Android: The non-standard ArrayBuffer.slice() method has been removed in Firefox for Android 53 (but the standardized version ArrayBuffer.prototype.slice() is kept.
javascript.builtins.ArrayBuffer.transfer 📋Chrome5/30/2023 Safari3/5/2024280
javascript.builtins.ArrayBuffer.transferToFixedLength 📋Chrome5/30/2023 Safari3/5/2024280
javascript.builtins.AsyncFunction 📋Chrome12/1/2016 Safari3/27/2017116
javascript.builtins.AsyncFunction.AsyncFunction 📋Chrome12/1/2016 Safari3/27/2017116
javascript.builtins.AsyncGenerator 📋Chrome12/6/2017 Safari9/17/2018285
javascript.builtins.AsyncGenerator.next 📋Chrome12/6/2017 Safari9/17/2018285
javascript.builtins.AsyncGenerator.return 📋Chrome12/6/2017 Safari9/17/2018285
javascript.builtins.AsyncGenerator.throw 📋Chrome12/6/2017 Safari9/17/2018285
javascript.builtins.AsyncGeneratorFunction 📋Chrome12/6/2017 Safari9/17/2018285
javascript.builtins.AsyncGeneratorFunction.AsyncGeneratorFunction 📋Chrome12/6/2017 Safari9/17/2018285
javascript.builtins.AsyncIterator 📋Chrome12/6/2017 Safari4/12/2018127
javascript.builtins.AsyncIterator.@@asyncIterator 📋Chrome12/6/2017 Safari4/12/2018127
javascript.builtins.Atomics 📋Chrome7/24/2018 Safari12/13/20211238
Safari: Before Safari 16.4, Atomics is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.Safari on iOS: Before Safari on iOS 16.4, Atomics is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.WebView on iOS: Before WebView on iOS 16.4, Atomics is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.
javascript.builtins.Atomics.add 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.and 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.compareExchange 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.exchange 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.isLockFree 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.load 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.notify 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.or 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.store 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.sub 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.wait 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.Atomics.waitAsync 📋Chrome11/17/2020 Safari3/27/2023860
javascript.builtins.Atomics.xor 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.BigInt 📋Chrome5/29/2018 Safari9/16/2020841
javascript.builtins.BigInt.BigInt 📋Chrome5/29/2018 Safari9/16/2020841
javascript.builtins.BigInt.asIntN 📋Chrome5/29/2018 Safari9/16/2020841
javascript.builtins.BigInt.asUintN 📋Chrome5/29/2018 Safari9/16/2020841
javascript.builtins.BigInt.toLocaleString 📋Chrome5/29/2018 Safari9/16/2020841
javascript.builtins.BigInt.toLocaleString.locales_parameter Chrome7/30/2019 Safari9/16/2020414
Deno: Only the locale data for en-US is available.
javascript.builtins.BigInt.toLocaleString.options_parameter Chrome7/30/2019 Safari9/16/2020414
javascript.builtins.BigInt.toString 📋Chrome5/29/2018 Safari9/16/2020841
javascript.builtins.BigInt.valueOf 📋Chrome5/29/2018 Safari9/16/2020841
javascript.builtins.BigInt64Array 📋Chrome5/29/2018 Safari9/20/20211210
javascript.builtins.BigInt64Array.BigInt64Array 📋Chrome5/29/2018 Safari9/20/20211210
javascript.builtins.BigUint64Array 📋Chrome5/29/2018 Safari9/20/20211210
javascript.builtins.BigUint64Array.BigUint64Array 📋Chrome5/29/2018 Safari9/20/20211210
javascript.builtins.Boolean 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Boolean.Boolean 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Boolean.toString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Boolean.valueOf 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.DataView 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.DataView 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.DataView.sharedarraybuffer_support Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.DataView.buffer 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.byteLength 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.byteOffset 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.getBigInt64 📋Chrome5/29/2018 Safari9/20/20211210
javascript.builtins.DataView.getBigUint64 📋Chrome5/29/2018 Safari9/20/20211210
javascript.builtins.DataView.getFloat32 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.getFloat64 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.getInt16 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.getInt32 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.getInt8 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.getUint16 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.getUint32 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.getUint8 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.setBigInt64 📋Chrome5/29/2018 Safari9/20/20211210
javascript.builtins.DataView.setBigUint64 📋Chrome5/29/2018 Safari9/20/20211210
javascript.builtins.DataView.setFloat32 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.setFloat64 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.setInt16 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.setInt32 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.setInt8 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.setUint16 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.setUint32 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.DataView.setUint8 📋Chrome2/3/2011 Safari7/20/2011167
javascript.builtins.Date 📋Safari6/23/2003 Chrome12/11/20081998
Internet Explorer: The ISO8601 Date Format is not supported in Internet Explorer 8 or earlier.
javascript.builtins.Date.@@toPrimitive 📋Chrome12/1/2015 Safari9/20/2016294
javascript.builtins.Date.Date 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.UTC 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.UTC.optional_monthIndex Chrome3/9/2017 Safari9/17/2018557
javascript.builtins.Date.getDate 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getDay 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getFullYear 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getHours 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getMilliseconds 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getMinutes 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getMonth 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getSeconds 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getTime 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getTimezoneOffset 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getUTCDate 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getUTCDay 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getUTCFullYear 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getUTCHours 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getUTCMilliseconds 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getUTCMinutes 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getUTCMonth 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getUTCSeconds 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.getYear 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.now 📋Chrome12/11/2008 Safari6/8/2009179
javascript.builtins.Date.parse 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.parse.iso_8601 Chrome9/2/2010 Safari7/20/2011321
javascript.builtins.Date.setDate 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setFullYear 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setHours 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setMilliseconds 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setMinutes 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setMonth 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setSeconds 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setTime 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setUTCDate 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setUTCFullYear 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setUTCHours 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setUTCMilliseconds 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setUTCMinutes 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setUTCMonth 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setUTCSeconds 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.setYear 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.toDateString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.toGMTString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.toISOString 📋Safari6/8/2009 Chrome9/15/200999
javascript.builtins.Date.toJSON 📋Safari6/8/2009 Chrome9/15/200999
javascript.builtins.Date.toLocaleDateString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.toLocaleDateString.iana_time_zone_names Chrome1/10/2013 Safari10/22/2013285
javascript.builtins.Date.toLocaleDateString.locales_parameter Chrome1/10/2013 Safari9/20/20161349
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Date.toLocaleDateString.options_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Date.toLocaleString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.toLocaleString.iana_time_zone_names Chrome1/10/2013 Safari10/22/2013285
javascript.builtins.Date.toLocaleString.locales_parameter Chrome1/10/2013 Safari9/20/20161349
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Date.toLocaleString.options_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Date.toLocaleTimeString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.toLocaleTimeString.iana_time_zone_names Chrome1/10/2013 Safari10/22/2013285
javascript.builtins.Date.toLocaleTimeString.locales_parameter Chrome1/10/2013 Safari9/20/20161349
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Date.toLocaleTimeString.options_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Date.toString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.toTimeString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.toUTCString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Date.valueOf 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Error 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Error.Error 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Error.Error.options_cause_parameter 📋Chrome8/31/2021 Safari9/20/202120
javascript.builtins.Error.cause 📋Chrome8/31/2021 Safari9/20/202120
javascript.builtins.Error.message 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Error.name 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Error.stack Chrome9/15/2009 Safari7/25/20121044
javascript.builtins.Error.toString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.EvalError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.EvalError.EvalError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.FinalizationRegistry 📋Chrome7/27/2020 Safari4/26/2021273
javascript.builtins.FinalizationRegistry.FinalizationRegistry 📋Chrome7/27/2020 Safari4/26/2021273
javascript.builtins.FinalizationRegistry.register 📋Chrome7/27/2020 Safari4/26/2021273
javascript.builtins.FinalizationRegistry.symbol_as_target Chrome1/10/2023 Safari3/27/202376
javascript.builtins.FinalizationRegistry.unregister 📋Chrome7/27/2020 Safari4/26/2021273
javascript.builtins.Float32Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Float32Array.Float32Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Float32Array.Float32Array.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Float32Array.Float32Array.iterable_allowed Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Float64Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Float64Array.Float64Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Float64Array.Float64Array.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Float64Array.Float64Array.iterable_allowed Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Function 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Function.@@hasInstance 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.Function.Function 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Function.apply 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Function.apply.generic_arrays_as_arguments Chrome2/8/2012 Safari7/25/2012168
javascript.builtins.Function.arguments Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Function.bind 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Function.call 📋Safari6/23/2003 Chrome12/11/20081998
Node.js: When calling this method, thisArg does not default to the global object.
javascript.builtins.Function.caller Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Function.length 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Function.length.configurable_true Chrome5/19/2015 Safari9/20/2016490
javascript.builtins.Function.name 📋Chrome10/25/2011 Safari7/25/2012274
javascript.builtins.Function.name.configurable_true Chrome5/19/2015 Safari9/20/2016490
javascript.builtins.Function.name.inferred_names Chrome5/25/2016 Safari9/20/2016118
Edge: Names for functions defined in a dictionary are properly assigned; however, anonymous functions defined on a var/let variable assignment have blank names.
javascript.builtins.Function.toString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Function.toString.toString_revision Chrome4/17/2018 Safari9/18/20231980
javascript.builtins.Generator 📋Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Generator.next 📋Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Generator.return 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.Generator.throw 📋Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.GeneratorFunction 📋Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.GeneratorFunction.GeneratorFunction 📋Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Infinity 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Int16Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Int16Array.Int16Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Int16Array.Int16Array.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Int16Array.Int16Array.iterable_allowed Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Int32Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Int32Array.Int32Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Int32Array.Int32Array.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Int32Array.Int32Array.iterable_allowed Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Int8Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Int8Array.Int8Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Int8Array.Int8Array.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Int8Array.Int8Array.iterable_allowed Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Intl 📋Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.Collator 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the Collator() constructor for more details.
javascript.builtins.Intl.Collator.Collator 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the Collator instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.Collator.Collator.options_caseFirst_parameter Chrome1/10/2013 Safari9/19/20171713
javascript.builtins.Intl.Collator.Collator.options_collation_parameter Chrome10/20/2020 Safari4/26/2021188
javascript.builtins.Intl.Collator.Collator.options_ignorePunctuation_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.Collator.Collator.options_localeMatcher_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.Collator.Collator.options_numeric_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.Collator.Collator.options_sensitivity_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.Collator.Collator.options_usage_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.Collator.compare 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the Collator() constructor for more details.
javascript.builtins.Intl.Collator.resolvedOptions 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the Collator() constructor for more details.
javascript.builtins.Intl.Collator.supportedLocalesOf 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.DateTimeFormat 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the DateTimeFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.IntlLegacyConstructedSymbol 📋Safari4/26/2021 Chrome5/25/202129
Chrome: The fallback symbol property has description IntlFallback.Chrome Android: The fallback symbol property has description IntlFallback.Edge: The fallback symbol property has description IntlFallback.Node.js: The fallback symbol property has description IntlFallback.Quest Browser: The fallback symbol property has description IntlFallback.Opera: The fallback symbol property has description IntlFallback.Opera Android: The fallback symbol property has description IntlFallback.Samsung Internet: The fallback symbol property has description IntlFallback.WebView Android: The fallback symbol property has description IntlFallback.
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.locales_parameter Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the DateTimeFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_calendar_parameter Chrome2/4/2020 Safari4/26/2021447
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_dateStyle_parameter Chrome7/30/2019 Safari4/26/2021636
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_dayPeriod_parameter Safari4/26/2021 Chrome7/20/202185
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_fractionalSecondDigits_parameter Chrome7/27/2020 Safari4/26/2021273
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_hourCycle_parameter Chrome3/12/2019 Safari9/19/2019191
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_numberingSystem_parameter Chrome2/4/2020 Safari4/26/2021447
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeStyle_parameter Chrome7/30/2019 Safari4/26/2021636
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZoneName_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZoneName_parameter.extended_values Chrome10/19/2021 Safari3/14/2022146
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZone_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZone_parameter.iana_time_zones Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.DateTimeFormat.format 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.
javascript.builtins.Intl.DateTimeFormat.formatRange 📋Chrome7/30/2019 Safari4/26/2021636
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.
javascript.builtins.Intl.DateTimeFormat.formatRangeToParts 📋Chrome7/30/2019 Safari4/26/2021636
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.
javascript.builtins.Intl.DateTimeFormat.formatToParts 📋Chrome3/9/2017 Safari9/19/2017194
Chrome: Before version 71, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.Chrome Android: Before version 71, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.Node.js: Before version 12.0.0, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 12.0.0 and later use the specification defined dayPeriod. See bug 41402623.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.Quest Browser: Before version 6.0, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.Opera: Before version 58, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 58 and later use the specification defined dayPeriod. See bug 41402623.Opera Android: Before version 50, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 50 and later use the specification defined dayPeriod. See bug 41402623.Samsung Internet: Before version 71, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.WebView Android: Before version 71, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.
javascript.builtins.Intl.DateTimeFormat.resolvedOptions 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.
javascript.builtins.Intl.DateTimeFormat.resolvedOptions.computed_timezone Chrome5/20/2014 Safari9/20/2016854
javascript.builtins.Intl.DateTimeFormat.supportedLocalesOf 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.DisplayNames 📋Chrome4/7/2020 Safari4/26/2021384
javascript.builtins.Intl.DisplayNames.DisplayNames 📋Chrome4/7/2020 Safari4/26/2021384
javascript.builtins.Intl.DisplayNames.of 📋Chrome4/7/2020 Safari4/26/2021384
javascript.builtins.Intl.DisplayNames.resolvedOptions 📋Chrome4/7/2020 Safari4/26/2021384
javascript.builtins.Intl.DisplayNames.supportedLocalesOf 📋Chrome4/7/2020 Safari4/26/2021384
javascript.builtins.Intl.DurationFormat 📋Safari3/27/2023 Chrome9/17/2024540
javascript.builtins.Intl.DurationFormat.DurationFormat 📋Safari3/27/2023 Chrome9/17/2024540
javascript.builtins.Intl.DurationFormat.format 📋Safari3/27/2023 Chrome9/17/2024540
javascript.builtins.Intl.DurationFormat.formatToParts 📋Safari3/27/2023 Chrome9/17/2024540
javascript.builtins.Intl.DurationFormat.resolvedOptions 📋Safari3/27/2023 Chrome9/17/2024540
javascript.builtins.Intl.DurationFormat.supportedLocalesOf 📋Safari3/27/2023 Chrome9/17/2024540
javascript.builtins.Intl.ListFormat 📋Chrome1/29/2019 Safari4/26/2021818
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the ListFormat() constructor for more details.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.ListFormat 📋Chrome1/29/2019 Safari4/26/2021818
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the ListFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.format 📋Chrome1/29/2019 Safari4/26/2021818
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the ListFormat() constructor for more details.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.formatToParts 📋Chrome1/29/2019 Safari4/26/2021818
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the ListFormat() constructor for more details.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.resolvedOptions 📋Chrome1/29/2019 Safari4/26/2021818
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the ListFormat() constructor for more details.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.supportedLocalesOf 📋Chrome1/29/2019 Safari4/26/2021818
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.Locale 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.Locale 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.baseName 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.calendar 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.caseFirst 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.collation 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.getCalendars 📋Safari9/18/2023 Chrome10/15/2024393
Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property.
javascript.builtins.Intl.Locale.getCollations 📋Safari9/18/2023 Chrome10/15/2024393
Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property.
javascript.builtins.Intl.Locale.getHourCycles 📋Safari9/18/2023 Chrome10/15/2024393
Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property.
javascript.builtins.Intl.Locale.getNumberingSystems 📋Safari9/18/2023 Chrome10/15/2024393
Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property.
javascript.builtins.Intl.Locale.getTextInfo 📋Safari9/18/2023 Chrome10/15/2024393
Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Deno: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property.
javascript.builtins.Intl.Locale.getTimeZones 📋Safari9/18/2023 Chrome10/15/2024393
Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property.
javascript.builtins.Intl.Locale.getWeekInfo 📋Safari9/18/2023 Chrome10/15/2024393
Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property.
javascript.builtins.Intl.Locale.hourCycle 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.language 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.maximize 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.minimize 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.numberingSystem 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.numeric 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.region 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.script 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.Locale.toString 📋Chrome4/23/2019 Safari9/16/2020512
javascript.builtins.Intl.NumberFormat 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the NumberFormat() constructor for more details.
javascript.builtins.Intl.NumberFormat.NumberFormat 📋Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.IntlLegacyConstructedSymbol 📋Safari4/26/2021 Chrome5/25/202129
Chrome: The fallback symbol property has description IntlFallback.Chrome Android: The fallback symbol property has description IntlFallback.Edge: The fallback symbol property has description IntlFallback.Node.js: The fallback symbol property has description IntlFallback.Quest Browser: The fallback symbol property has description IntlFallback.Opera: The fallback symbol property has description IntlFallback.Opera Android: The fallback symbol property has description IntlFallback.Samsung Internet: The fallback symbol property has description IntlFallback.WebView Android: The fallback symbol property has description IntlFallback.
javascript.builtins.Intl.NumberFormat.NumberFormat.locales_parameter Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the NumberFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_compactDisplay_parameter Chrome9/10/2019 Safari4/26/2021594
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currencyDisplay_parameter Chrome9/10/2019 Safari4/26/2021594
Safari: Doesn't support currencyDisplay: 'narrowSymbol'.Safari on iOS: Doesn't support currencyDisplay: 'narrowSymbol'.WebView on iOS: Doesn't support currencyDisplay: 'narrowSymbol'.
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currencySign_parameter Chrome9/10/2019 Safari4/26/2021594
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currency_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_localeMatcher_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_maximumFractionDigits_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_maximumSignificantDigits_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumFractionDigits_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumIntegerDigits_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumSignificantDigits_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_notation_parameter Chrome9/10/2019 Safari4/26/2021594
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_numberingSystem_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingIncrement_parameter Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingMode_parameter Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingPriority_parameter Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_signDisplay_parameter Chrome9/10/2019 Safari4/26/2021594
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_signDisplay_parameter.negative Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_style_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_trailingZeroDisplay_parameter Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_unitDisplay_parameter Chrome9/10/2019 Safari4/26/2021594
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_unit_parameter Chrome9/10/2019 Safari4/26/2021594
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_useGrouping_parameter Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the NumberFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_useGrouping_parameter.string_values Chrome9/27/2022 Safari3/27/2023181
javascript.builtins.Intl.NumberFormat.format 📋Chrome1/10/2013 Safari9/20/20161349
Edge: Before Edge 18, numbers are rounded to 15 decimal digits. For example, new Intl.NumberFormat('en-US').format(1000000000000005) returns "1,000,000,000,000,010".Internet Explorer: In Internet Explorer 11, numbers are rounded to 15 decimal digits. For example, new Intl.NumberFormat('en-US').format(1000000000000005) returns "1,000,000,000,000,010".Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the NumberFormat() constructor for more details.
javascript.builtins.Intl.NumberFormat.format.number_parameter-string_decimal Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.NumberFormat.formatRange 📋Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.NumberFormat.formatRangeToParts 📋Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.NumberFormat.formatToParts 📋Chrome1/23/2018 Safari9/19/2019604
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the NumberFormat() constructor for more details.
javascript.builtins.Intl.NumberFormat.resolvedOptions 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the NumberFormat() constructor for more details.
javascript.builtins.Intl.NumberFormat.supportedLocalesOf 📋Chrome1/10/2013 Safari9/20/20161349
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.PluralRules 📋Chrome12/6/2017 Safari9/19/2019652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the PluralRules() constructor for more details.
javascript.builtins.Intl.PluralRules.PluralRules 📋Chrome12/6/2017 Safari9/19/2019652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the PluralRules instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingMode_parameter Chrome9/12/2023 Safari12/11/202390
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingPriority_parameter Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.PluralRules.resolvedOptions 📋Chrome12/6/2017 Safari9/19/2019652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the PluralRules() constructor for more details.
javascript.builtins.Intl.PluralRules.select 📋Chrome12/6/2017 Safari9/19/2019652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the PluralRules() constructor for more details.
javascript.builtins.Intl.PluralRules.selectRange 📋Safari3/14/2022 Chrome9/27/2022197
javascript.builtins.Intl.PluralRules.supportedLocalesOf 📋Chrome12/6/2017 Safari9/19/2019652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the PluralRules() constructor for more details.
javascript.builtins.Intl.RelativeTimeFormat 📋Chrome12/4/2018 Safari9/16/2020652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() constructor for more details.
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat 📋Chrome12/4/2018 Safari9/16/2020652
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.locales_parameter Chrome12/4/2018 Safari9/16/2020652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the RelativeTimeFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_localeMatcher_parameter Chrome12/4/2018 Safari9/16/2020652
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_numberingSystem_parameter Chrome12/4/2018 Safari9/16/2020652
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_numeric_parameter Chrome12/4/2018 Safari9/16/2020652
javascript.builtins.Intl.RelativeTimeFormat.format 📋Chrome12/4/2018 Safari9/16/2020652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() constructor for more details.
javascript.builtins.Intl.RelativeTimeFormat.formatToParts 📋Chrome12/4/2018 Safari9/16/2020652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() constructor for more details.
javascript.builtins.Intl.RelativeTimeFormat.resolvedOptions 📋Chrome12/4/2018 Safari9/16/2020652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() constructor for more details.
javascript.builtins.Intl.RelativeTimeFormat.supportedLocalesOf 📋Chrome12/4/2018 Safari9/16/2020652
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.Segmenter 📋Chrome11/17/2020 Safari4/26/2021160
javascript.builtins.Intl.Segmenter.Segmenter 📋Chrome11/17/2020 Safari4/26/2021160
javascript.builtins.Intl.Segmenter.resolvedOptions 📋Chrome11/17/2020 Safari4/26/2021160
javascript.builtins.Intl.Segmenter.segment 📋Chrome11/17/2020 Safari4/26/2021160
javascript.builtins.Intl.Segmenter.supportedLocalesOf 📋Chrome11/17/2020 Safari4/26/2021160
javascript.builtins.Intl.Segments 📋Chrome11/17/2020 Safari4/26/2021160
javascript.builtins.Intl.Segments.@@iterator 📋Chrome11/17/2020 Safari4/26/2021160
javascript.builtins.Intl.Segments.containing 📋Chrome11/17/2020 Safari4/26/2021160
javascript.builtins.Intl.getCanonicalLocales 📋Chrome10/12/2016 Safari3/27/2017166
javascript.builtins.Intl.supportedValuesOf 📋Chrome3/1/2022 Safari3/14/202213
javascript.builtins.Iterator 📋Chrome10/7/2014 Safari9/20/2016714
javascript.builtins.Iterator.@@iterator 📋Chrome10/7/2014 Safari9/20/2016714
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.JSON 📋Safari6/8/2009 Chrome9/15/200999
javascript.builtins.JSON.json_superset Chrome4/17/2018 Safari9/17/2018153
javascript.builtins.JSON.parse 📋Safari6/8/2009 Chrome9/15/200999
javascript.builtins.JSON.stringify 📋Safari6/8/2009 Chrome9/15/200999
javascript.builtins.JSON.stringify.well_formed_stringify Chrome1/29/2019 Safari3/25/201955
javascript.builtins.Map 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Map.@@iterator 📋Chrome10/7/2014 Safari9/20/2016714
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.Map.@@species 📋Chrome5/25/2016 Safari9/20/2016118
javascript.builtins.Map.Map 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Map.Map.iterable_allowed Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Map.Map.null_allowed Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Map.clear 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Map.delete 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Map.entries 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Map.forEach 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Map.get 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Map.groupBy 📋Chrome9/12/2023 Safari3/5/2024175
javascript.builtins.Map.has 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Map.key_equality_for_zeros Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Map.keys 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Map.set 📋Chrome10/7/2014 Safari10/16/20149
Internet Explorer: Returns 'undefined' instead of the 'Map' object.
javascript.builtins.Map.size 📋Chrome10/7/2014 Safari10/16/20149
Firefox: From Firefox 13 to Firefox 18, the size property was implemented as a Map.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification.Firefox for Android: From Firefox for Android 14 to Firefox for Android 18, the size property was implemented as a Map.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification.
javascript.builtins.Map.values 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.E 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.LN10 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.LN2 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.LOG10E 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.LOG2E 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.PI 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.SQRT1_2 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.SQRT2 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.abs 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.acos 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.acosh 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.asin 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.asinh 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.atan 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.atan2 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.atanh 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.cbrt 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.ceil 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.clz32 📋Safari10/22/2013 Chrome10/7/2014350
javascript.builtins.Math.cos 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.cosh 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.exp 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.expm1 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.floor 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.fround 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.hypot 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.imul 📋Chrome7/9/2013 Safari10/22/2013105
javascript.builtins.Math.log 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.log10 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.log1p 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.log2 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.max 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.min 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.pow 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.random 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.round 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.sign 📋Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Math.sin 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.sinh 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.sqrt 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.tan 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Math.tanh 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Math.trunc 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.NaN 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Number 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Number.EPSILON 📋Chrome4/8/2014 Safari9/30/2015540
javascript.builtins.Number.MAX_SAFE_INTEGER 📋Chrome4/8/2014 Safari9/30/2015540
javascript.builtins.Number.MAX_VALUE 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Number.MIN_SAFE_INTEGER 📋Chrome4/8/2014 Safari9/30/2015540
javascript.builtins.Number.MIN_VALUE 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Number.NEGATIVE_INFINITY 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Number.NaN 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Number.Number 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Number.POSITIVE_INFINITY 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Number.isFinite 📋Chrome5/15/2012 Safari9/30/20151233
javascript.builtins.Number.isInteger 📋Chrome4/8/2014 Safari9/30/2015540
javascript.builtins.Number.isNaN 📋Chrome2/21/2013 Safari9/30/2015951
javascript.builtins.Number.isSafeInteger 📋Chrome4/8/2014 Safari9/30/2015540
javascript.builtins.Number.parseFloat 📋Chrome4/8/2014 Safari9/30/2015540
javascript.builtins.Number.parseInt 📋Chrome4/8/2014 Safari9/30/2015540
javascript.builtins.Number.toExponential 📋Safari4/29/2005 Chrome12/11/20081322
javascript.builtins.Number.toFixed 📋Safari4/29/2005 Chrome12/11/20081322
javascript.builtins.Number.toLocaleString 📋Safari6/23/2003 Chrome12/11/20081998
Edge: Before Edge 18, numbers are rounded to 15 decimal digits. For example, (1000000000000005).toLocaleString('en-US') returns "1,000,000,000,000,010".Internet Explorer: In Internet Explorer 11, numbers are rounded to 15 decimal digits. For example, (1000000000000005).toLocaleString('en-US') returns "1,000,000,000,000,010".
javascript.builtins.Number.toLocaleString.locales_parameter Chrome1/10/2013 Safari9/20/20161349
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Number.toLocaleString.options_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.Number.toPrecision 📋Safari4/29/2005 Chrome12/11/20081322
javascript.builtins.Number.toString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Number.valueOf 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Object 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Object.Object 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Object.assign 📋Chrome9/1/2015 Safari9/30/201529
javascript.builtins.Object.constructor 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Object.create 📋Chrome5/25/2010 Safari6/7/201013
javascript.builtins.Object.defineGetter 📋Safari10/26/2007 Chrome12/11/2008412
Firefox: Starting with Firefox 48, this method can no longer be called at the global scope without any object. A TypeError will be thrown otherwise. Previously, the global object was used in these cases automatically, but this is no longer the case.
javascript.builtins.Object.defineProperties 📋Chrome5/25/2010 Safari6/7/201013
javascript.builtins.Object.defineProperty 📋Chrome5/25/2010 Safari7/20/2011421
Internet Explorer: In Internet Explorer 8, this was only supported on DOM objects and with some non-standard behaviors. This was later fixed in Internet Explorer 9.Safari: Also supported in Safari 5, but not on DOM objects.Safari on iOS: Also supported in Safari for iOS 4.2, but not on DOM objects.WebView on iOS: Also supported in Safari for iOS 4.2, but not on DOM objects.
javascript.builtins.Object.defineSetter 📋Safari10/26/2007 Chrome12/11/2008412
Firefox: Starting with Firefox 48, this method can no longer be called at the global scope without any object. A TypeError will be thrown otherwise. Previously, the global object was used in these cases automatically, but this is no longer the case.
javascript.builtins.Object.entries 📋Chrome10/12/2016 Safari3/27/2017166
javascript.builtins.Object.freeze 📋Chrome9/2/2010 Safari7/20/2011321
javascript.builtins.Object.fromEntries 📋Chrome3/12/2019 Safari3/25/201913
javascript.builtins.Object.getOwnPropertyDescriptor 📋Chrome5/25/2010 Safari6/7/201013
Internet Explorer: In Internet Explorer 8, this was only supported on DOM objects and with some non-standard behaviors. This was later fixed in Internet Explorer 9.
javascript.builtins.Object.getOwnPropertyDescriptors 📋Safari9/20/2016 Chrome10/12/201622
javascript.builtins.Object.getOwnPropertyNames 📋Chrome5/25/2010 Safari6/7/201013
javascript.builtins.Object.getOwnPropertySymbols 📋Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Object.getPrototypeOf 📋Chrome5/25/2010 Safari6/7/201013
javascript.builtins.Object.groupBy 📋Chrome9/12/2023 Safari3/5/2024175
javascript.builtins.Object.hasOwn 📋Chrome8/31/2021 Safari3/14/2022195
javascript.builtins.Object.hasOwnProperty 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Object.is 📋Chrome5/15/2012 Safari9/30/20151233
javascript.builtins.Object.isExtensible 📋Chrome9/2/2010 Safari7/20/2011321
javascript.builtins.Object.isFrozen 📋Chrome9/2/2010 Safari7/20/2011321
javascript.builtins.Object.isPrototypeOf 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Object.isSealed 📋Chrome9/2/2010 Safari7/20/2011321
javascript.builtins.Object.keys 📋Chrome5/25/2010 Safari6/7/201013
javascript.builtins.Object.lookupGetter 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Object.lookupSetter 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Object.preventExtensions 📋Chrome9/2/2010 Safari7/20/2011321
javascript.builtins.Object.preventExtensions.ES2015_behavior Chrome7/21/2015 Safari9/30/201571
javascript.builtins.Object.propertyIsEnumerable 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Object.proto 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.Object.seal 📋Chrome9/2/2010 Safari7/20/2011321
javascript.builtins.Object.setPrototypeOf 📋Chrome4/8/2014 Safari9/30/2015540
javascript.builtins.Object.toLocaleString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Object.toString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Object.valueOf 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Object.values 📋Chrome10/12/2016 Safari3/27/2017166
javascript.builtins.Promise 📋Chrome1/14/2014 Safari10/16/2014275
javascript.builtins.Promise.@@species 📋Chrome5/25/2016 Safari9/20/2016118
javascript.builtins.Promise.Promise 📋Chrome1/14/2014 Safari10/16/2014275
Firefox: Constructor requires a new operator since version 37.Firefox for Android: Constructor requires a new operator since version 37.Node.js: Constructor requires a new operator since version 4.Safari: Constructor requires a new operator since version 10.Safari on iOS: Constructor requires a new operator since version 10.WebView on iOS: Constructor requires a new operator since version 10.
javascript.builtins.Promise.all 📋Chrome1/14/2014 Safari10/16/2014275
javascript.builtins.Promise.allSettled 📋Chrome7/30/2019 Safari9/19/201951
javascript.builtins.Promise.any 📋Chrome8/25/2020 Safari9/16/202022
javascript.builtins.Promise.catch 📋Chrome1/14/2014 Safari10/16/2014275
javascript.builtins.Promise.finally 📋Chrome12/6/2017 Safari4/12/2018127
javascript.builtins.Promise.race 📋Chrome1/14/2014 Safari10/16/2014275
javascript.builtins.Promise.reject 📋Chrome1/14/2014 Safari10/16/2014275
javascript.builtins.Promise.resolve 📋Chrome1/14/2014 Safari10/16/2014275
javascript.builtins.Promise.then 📋Chrome1/14/2014 Safari10/16/2014275
javascript.builtins.Promise.try 📋Chrome8/20/2024 Safari12/11/2024113
javascript.builtins.Promise.withResolvers 📋Chrome10/31/2023 Safari3/5/2024126
javascript.builtins.Proxy 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.Proxy 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.apply 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.construct 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.defineProperty 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.deleteProperty 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.get 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.getOwnPropertyDescriptor 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.getPrototypeOf 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.has 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.isExtensible 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.ownKeys 📋Chrome3/2/2016 Safari9/20/2016202
Firefox: In Firefox 42, the implementation got updated to reflect the final ES2015 specification: The result is now checked if it is an array and if the array elements are either of type string or of type symbol. Enumerating duplicate own property names is not a failure anymore.Firefox for Android: In Firefox for Android 42, the implementation got updated to reflect the final ES2015 specification: The result is now checked if it is an array and if the array elements are either of type string or of type symbol. Enumerating duplicate own property names is not a failure anymore.
javascript.builtins.Proxy.handler.preventExtensions 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.set 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.handler.setPrototypeOf 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Proxy.revocable 📋Safari9/20/2016 Chrome12/6/2017442
javascript.builtins.RangeError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RangeError.RangeError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.ReferenceError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.ReferenceError.ReferenceError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Reflect 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.apply 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.construct 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.defineProperty 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.deleteProperty 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.get 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.getOwnPropertyDescriptor 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.getPrototypeOf 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.has 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.isExtensible 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.ownKeys 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.preventExtensions 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.set 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Reflect.setPrototypeOf 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.RegExp 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.@@match 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.RegExp.@@matchAll 📋Chrome3/12/2019 Safari9/19/2019191
javascript.builtins.RegExp.@@replace 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.RegExp.@@search 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.RegExp.@@species 📋Chrome5/25/2016 Safari9/20/2016118
javascript.builtins.RegExp.@@split 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.RegExp.RegExp 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.compile 📋Safari3/18/2008 Chrome12/11/2008268
javascript.builtins.RegExp.dotAll 📋Chrome10/17/2017 Safari4/12/2018177
javascript.builtins.RegExp.exec 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.flags 📋Safari9/30/2015 Chrome3/2/2016154
javascript.builtins.RegExp.global 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.global.prototype_accessor Safari4/15/2005 Chrome1/20/20163932
javascript.builtins.RegExp.hasIndices 📋Chrome4/13/2021 Safari9/20/2021160
javascript.builtins.RegExp.ignoreCase 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.ignoreCase.prototype_accessor Safari4/15/2005 Chrome1/20/20163932
javascript.builtins.RegExp.input 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.RegExp.lastIndex 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.lastMatch 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.RegExp.lastParen 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.RegExp.leftContext 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.RegExp.multiline 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.multiline.prototype_accessor Safari4/15/2005 Chrome1/20/20163932
javascript.builtins.RegExp.n 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.rightContext 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.RegExp.source 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.source.empty_regex_string Safari6/7/2010 Chrome9/2/201087
javascript.builtins.RegExp.source.escaping Safari7/25/2012 Chrome3/12/20192421
javascript.builtins.RegExp.source.prototype_accessor Safari4/15/2005 Chrome1/20/20163932
javascript.builtins.RegExp.sticky 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.RegExp.sticky.anchored_sticky_flag Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.RegExp.sticky.prototype_accessor Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.RegExp.test 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.toString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.RegExp.toString.escaping Safari7/25/2012 Chrome3/12/20192421
javascript.builtins.RegExp.unicode 📋Chrome4/13/2016 Safari9/20/2016160
Edge: Case folding is implemented in version 13Node.js: Case folding is implemented in version 8.6.0
javascript.builtins.RegExp.unicodeSets 📋Chrome4/4/2023 Safari9/18/2023167
javascript.builtins.Set 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Set.@@iterator 📋Chrome5/19/2015 Safari9/30/2015134
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.Set.@@species 📋Chrome5/25/2016 Safari9/20/2016118
javascript.builtins.Set.Set 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Set.Set.iterable_allowed Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Set.Set.null_allowed Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Set.add 📋Chrome10/7/2014 Safari10/16/20149
Internet Explorer: Returns 'undefined' instead of the 'Set' object.
javascript.builtins.Set.clear 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Set.delete 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Set.difference 📋Safari9/18/2023 Chrome2/20/2024155
javascript.builtins.Set.entries 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Set.forEach 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Set.has 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Set.intersection 📋Safari9/18/2023 Chrome2/20/2024155
javascript.builtins.Set.isDisjointFrom 📋Safari9/18/2023 Chrome2/20/2024155
javascript.builtins.Set.isSubsetOf 📋Safari9/18/2023 Chrome2/20/2024155
javascript.builtins.Set.isSupersetOf 📋Safari9/18/2023 Chrome2/20/2024155
javascript.builtins.Set.key_equality_for_zeros Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Set.keys 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.Set.size 📋Chrome10/7/2014 Safari10/16/20149
Firefox: From Firefox 13 to Firefox 18, the size property was implemented as a Set.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification.Firefox for Android: From Firefox for Android 14 to Firefox for Android 18, the size property was implemented as a Set.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification.
javascript.builtins.Set.symmetricDifference 📋Safari9/18/2023 Chrome2/20/2024155
javascript.builtins.Set.union 📋Safari9/18/2023 Chrome2/20/2024155
javascript.builtins.Set.values 📋Chrome10/7/2014 Safari10/16/20149
javascript.builtins.SharedArrayBuffer 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.SharedArrayBuffer.@@species 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.SharedArrayBuffer.SharedArrayBuffer 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.SharedArrayBuffer.SharedArrayBuffer.maxByteLength_option 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.SharedArrayBuffer.byteLength 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.SharedArrayBuffer.grow 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.SharedArrayBuffer.growable 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.SharedArrayBuffer.maxByteLength 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.SharedArrayBuffer.slice 📋Chrome7/24/2018 Safari12/13/20211238
javascript.builtins.String 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.@@iterator 📋Chrome10/7/2014 Safari9/30/2015358
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.String.String 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.anchor 📋Safari6/23/2003 Chrome12/11/20081998
Firefox: Starting with version 17, the quotation mark (") is replaced by its HTML reference character (") in strings supplied for the name parameter.
javascript.builtins.String.at 📋Chrome7/20/2021 Safari3/14/2022237
javascript.builtins.String.big 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.blink 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.bold 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.charAt 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.charCodeAt 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.codePointAt 📋Chrome3/3/2015 Safari9/30/2015211
javascript.builtins.String.concat 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.endsWith 📋Chrome3/3/2015 Safari9/30/2015211
javascript.builtins.String.fixed 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.fontcolor 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.fontsize 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.fromCharCode 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.fromCodePoint 📋Chrome3/3/2015 Safari9/30/2015211
javascript.builtins.String.includes 📋Chrome3/3/2015 Safari9/30/2015211
javascript.builtins.String.indexOf 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.isWellFormed 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.String.italics 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.lastIndexOf 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.length 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.link 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.localeCompare 📋Safari10/26/2007 Chrome12/11/2008412
javascript.builtins.String.localeCompare.locales_parameter Chrome1/10/2013 Safari9/20/20161349
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.String.localeCompare.options_parameter Chrome1/10/2013 Safari9/20/20161349
javascript.builtins.String.match 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.matchAll 📋Chrome3/12/2019 Safari9/19/2019191
javascript.builtins.String.normalize 📋Chrome4/8/2014 Safari9/20/2016896
javascript.builtins.String.padEnd 📋Safari9/20/2016 Chrome3/9/2017170
javascript.builtins.String.padStart 📋Safari9/20/2016 Chrome3/9/2017170
javascript.builtins.String.raw 📋Chrome3/3/2015 Safari9/30/2015211
javascript.builtins.String.repeat 📋Chrome3/3/2015 Safari9/30/2015211
javascript.builtins.String.replace 📋Safari6/23/2003 Chrome12/11/20081998
Internet Explorer: A replacement function as second argument is not supported.
javascript.builtins.String.replaceAll 📋Safari3/24/2020 Chrome8/25/2020154
javascript.builtins.String.search 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.slice 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.small 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.split 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.startsWith 📋Chrome3/3/2015 Safari9/30/2015211
javascript.builtins.String.strike 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.sub 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.substr 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.substring 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.sup 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.toLocaleLowerCase 📋Safari4/15/2005 Chrome12/11/20081336
javascript.builtins.String.toLocaleLowerCase.locales_parameter Safari9/20/2016 Chrome4/19/2017211
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.String.toLocaleUpperCase 📋Safari4/15/2005 Chrome12/11/20081336
javascript.builtins.String.toLocaleUpperCase.locales_parameter Safari9/20/2016 Chrome4/19/2017211
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.String.toLowerCase 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.toString 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.toUpperCase 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.toWellFormed 📋Chrome3/7/2023 Safari3/27/202320
javascript.builtins.String.trim 📋Chrome1/25/2010 Safari6/7/2010133
javascript.builtins.String.trimEnd 📋Chrome4/17/2018 Safari9/17/2018153
javascript.builtins.String.trimStart 📋Chrome4/17/2018 Safari9/17/2018153
javascript.builtins.String.unicode_code_point_escapes Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.String.valueOf 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Symbol 📋Chrome10/7/2014 Safari9/30/2015358
Edge: Edge 12 included Symbol properties in JSON.stringify() output.
javascript.builtins.Symbol.@@toPrimitive 📋Chrome12/1/2015 Safari9/20/2016294
javascript.builtins.Symbol.Symbol 📋Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Symbol.asyncIterator 📋Chrome12/6/2017 Safari4/12/2018127
javascript.builtins.Symbol.description 📋Chrome10/16/2018 Safari3/25/2019160
Safari: No support for an undefined description.Safari on iOS: No support for an undefined description.WebView on iOS: No support for an undefined description.
javascript.builtins.Symbol.for 📋Chrome1/21/2015 Safari9/30/2015252
javascript.builtins.Symbol.hasInstance 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.Symbol.isConcatSpreadable 📋Chrome1/20/2016 Safari9/20/2016244
javascript.builtins.Symbol.iterator 📋Chrome5/19/2015 Safari9/20/2016490
javascript.builtins.Symbol.keyFor 📋Chrome1/21/2015 Safari9/30/2015252
javascript.builtins.Symbol.match 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.Symbol.matchAll 📋Chrome3/12/2019 Safari9/19/2019191
javascript.builtins.Symbol.replace 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.Symbol.search 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.Symbol.species 📋Chrome5/25/2016 Safari9/20/2016118
javascript.builtins.Symbol.split 📋Chrome4/13/2016 Safari9/20/2016160
javascript.builtins.Symbol.toPrimitive 📋Chrome12/1/2015 Safari9/20/2016294
javascript.builtins.Symbol.toString 📋Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Symbol.toStringTag 📋Chrome3/2/2016 Safari9/20/2016202
javascript.builtins.Symbol.toStringTag.dom_objects Chrome4/13/2016 Safari9/16/20201617
javascript.builtins.Symbol.unscopables 📋Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.Symbol.valueOf 📋Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.SyntaxError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.SyntaxError.SyntaxError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.TypeError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.TypeError.TypeError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.TypedArray 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.@@iterator 📋Chrome10/7/2014 Safari9/20/2016714
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.TypedArray.@@species 📋Chrome5/25/2016 Safari9/20/2016118
javascript.builtins.TypedArray.BYTES_PER_ELEMENT 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.at 📋Chrome7/20/2021 Safari3/14/2022237
javascript.builtins.TypedArray.buffer 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.byteLength 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.byteOffset 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.copyWithin 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.entries 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.every 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.fill 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.filter 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.find 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.findIndex 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.findLast 📋Chrome1/4/2022 Safari3/14/202269
javascript.builtins.TypedArray.findLastIndex 📋Chrome1/4/2022 Safari3/14/202269
javascript.builtins.TypedArray.forEach 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.from 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.includes 📋Chrome12/1/2015 Safari9/20/2016294
javascript.builtins.TypedArray.indexOf 📋Chrome9/1/2015 Safari9/20/2016385
Firefox: Starting with Firefox 47, this method will no longer return -0. For example, new Uint8Array([0]).indexOf(0, -0) will now always return +0.Firefox for Android: Starting with Firefox for Android 47, this method will no longer return -0. For example, new Uint8Array([0]).indexOf(0, -0) will now always return +0.
javascript.builtins.TypedArray.index_properties_not_consulting_prototype Chrome10/19/2010 Safari7/20/2011274
Chrome: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Chrome Android: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Deno: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Edge: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Internet Explorer: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Node.js: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Quest Browser: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Opera: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Opera Android: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Safari: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Safari on iOS: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Samsung Internet: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.WebView Android: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.WebView on iOS: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
javascript.builtins.TypedArray.iterable_in_constructor Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.TypedArray.join 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.keys 📋Chrome10/7/2014 Safari9/20/2016714
javascript.builtins.TypedArray.lastIndexOf 📋Chrome9/1/2015 Safari9/20/2016385
Firefox: Starting with Firefox 47, this method will no longer return -0. For example, new Uint8Array([0]).lastIndexOf(0, -0) will now always return +0.Firefox for Android: Starting with Firefox for Android 47, this method will no longer return -0. For example, new Uint8Array([0]).lastIndexOf(0, -0) will now always return +0.
javascript.builtins.TypedArray.length 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.map 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.name 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.named_properties Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.of 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.reduce 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.reduceRight 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.reverse 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.set 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.slice 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.some 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.sort 📋Chrome9/1/2015 Safari9/20/2016385
javascript.builtins.TypedArray.subarray 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.toLocaleString 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.toReversed 📋Safari9/12/2022 Chrome2/7/2023148
javascript.builtins.TypedArray.toSorted 📋Safari9/12/2022 Chrome2/7/2023148
javascript.builtins.TypedArray.toString 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.TypedArray.values 📋Chrome10/7/2014 Safari9/20/2016714
javascript.builtins.TypedArray.with 📋Safari9/12/2022 Chrome2/7/2023148
javascript.builtins.URIError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.URIError.URIError 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.Uint16Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint16Array.Uint16Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint16Array.Uint16Array.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint16Array.Uint16Array.iterable_allowed Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Uint32Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint32Array.Uint32Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint32Array.Uint32Array.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint32Array.Uint32Array.iterable_allowed Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Uint8Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint8Array.Uint8Array 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint8Array.Uint8Array.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint8Array.Uint8Array.iterable_allowed Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.Uint8ClampedArray 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint8ClampedArray.Uint8ClampedArray 📋Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint8ClampedArray.Uint8ClampedArray.constructor_without_parameters Chrome10/19/2010 Safari7/20/2011274
javascript.builtins.Uint8ClampedArray.Uint8ClampedArray.iterable_allowed Chrome11/18/2014 Safari9/20/2016672
javascript.builtins.WeakMap 📋Chrome7/16/2014 Safari10/16/201492
javascript.builtins.WeakMap.WeakMap 📋Chrome7/16/2014 Safari10/16/201492
javascript.builtins.WeakMap.WeakMap.iterable_allowed Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.WeakMap.WeakMap.null_allowed Chrome7/16/2014 Safari10/16/201492
javascript.builtins.WeakMap.delete 📋Chrome7/16/2014 Safari10/16/201492
Firefox: Before Firefox 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.Firefox for Android: Before Firefox for Android 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.
javascript.builtins.WeakMap.get 📋Chrome7/16/2014 Safari10/16/201492
Firefox: Before Firefox 38, this method threw a TypeError when the key parameter was not an object. However, the ES2015 specification specifies to return undefined instead. Furthermore, WeakMap.prototype.get accepted an optional second argument as a fallback value, which is not part of the standard. Both non-standard behaviors are removed in version 38 and higher.Firefox for Android: Before Firefox for Android 38, this method threw a TypeError when the key parameter was not an object. However, the ES2015 specification specifies to return undefined instead. Furthermore, WeakMap.prototype.get accepted an optional second argument as a fallback value, which is not part of the standard. Both non-standard behaviors are removed in version 38 and higher.
javascript.builtins.WeakMap.has 📋Chrome7/16/2014 Safari10/16/201492
Firefox: Before Firefox 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.Firefox for Android: Before Firefox for Android 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.
javascript.builtins.WeakMap.set 📋Chrome7/16/2014 Safari10/16/201492
Firefox: Before Firefox 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.Firefox for Android: Before Firefox for Android 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.Internet Explorer: Returns 'undefined' instead of the 'Map' object.
javascript.builtins.WeakMap.symbol_as_keys Chrome1/10/2023 Safari3/27/202376
javascript.builtins.WeakRef 📋Chrome7/27/2020 Safari4/26/2021273
javascript.builtins.WeakRef.WeakRef 📋Chrome7/27/2020 Safari4/26/2021273
javascript.builtins.WeakRef.deref 📋Chrome7/27/2020 Safari4/26/2021273
javascript.builtins.WeakRef.symbol_as_target Chrome1/10/2023 Safari3/27/202376
javascript.builtins.WeakSet 📋Chrome7/16/2014 Safari9/30/2015441
javascript.builtins.WeakSet.WeakSet 📋Chrome7/16/2014 Safari9/30/2015441
javascript.builtins.WeakSet.WeakSet.iterable_allowed Chrome10/7/2014 Safari9/30/2015358
javascript.builtins.WeakSet.WeakSet.null_allowed Chrome7/16/2014 Safari9/30/2015441
javascript.builtins.WeakSet.add 📋Chrome7/16/2014 Safari9/30/2015441
javascript.builtins.WeakSet.delete 📋Chrome7/16/2014 Safari9/30/2015441
javascript.builtins.WeakSet.has 📋Chrome7/16/2014 Safari9/30/2015441
javascript.builtins.WeakSet.symbol_as_keys Chrome1/10/2023 Safari3/27/202376
javascript.builtins.decodeURI 📋Safari10/24/2003 Chrome12/11/20081875
javascript.builtins.decodeURIComponent 📋Safari10/24/2003 Chrome12/11/20081875
javascript.builtins.encodeURI 📋Safari10/24/2003 Chrome12/11/20081875
javascript.builtins.encodeURIComponent 📋Safari10/24/2003 Chrome12/11/20081875
javascript.builtins.escape 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.eval 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.globalThis 📋Chrome12/4/2018 Safari3/25/2019111
javascript.builtins.isFinite 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.isNaN 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.parseFloat 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.parseInt 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.parseInt.leading_zero_strings_as_decimal Safari7/25/2012 Chrome11/6/2012104
javascript.builtins.undefined 📋Safari6/23/2003 Chrome12/11/20081998
javascript.builtins.unescape 📋Safari6/23/2003 Chrome12/11/20081998
javascript.classes 📋Safari9/30/2015 Chrome3/2/2016154
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.classes.constructor 📋Safari9/30/2015 Chrome3/2/2016154
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.classes.extends 📋Safari9/30/2015 Chrome3/2/2016154
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.classes.private_class_fields 📋Chrome4/23/2019 Safari4/26/2021734
javascript.classes.private_class_fields_in 📋Chrome5/25/2021 Safari9/20/2021118
javascript.classes.private_class_methods 📋Chrome7/27/2020 Safari9/20/2021420
javascript.classes.public_class_fields 📋Chrome1/29/2019 Safari9/12/20221322
Safari: Parentheses in field initializers can lead to ReferenceErrors. See bug 236843.Safari: Doesn't support public static fields. See bug 194095.Safari on iOS: Parentheses in field initializers can lead to ReferenceErrors. See bug 236843.Safari on iOS: Doesn't support public static fields. See bug 194095.WebView on iOS: Parentheses in field initializers can lead to ReferenceErrors. See bug 236843.WebView on iOS: Doesn't support public static fields. See bug 194095.
javascript.classes.static 📋Safari9/30/2015 Chrome3/2/2016154
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.classes.static_class_fields 📋Chrome1/29/2019 Safari4/26/2021818
javascript.classes.static_initialization_blocks 📋Chrome9/21/2021 Safari3/27/2023552
javascript.functions 📋Safari6/23/2003 Chrome12/11/20081998
javascript.functions.arguments 📋Safari6/23/2003 Chrome12/11/20081998
javascript.functions.arguments.@@iterator 📋Safari9/30/2015 Chrome7/20/2016294
javascript.functions.arguments.callee 📋Safari6/23/2003 Chrome12/11/20081998
javascript.functions.arguments.length 📋Safari6/23/2003 Chrome12/11/20081998
javascript.functions.arrow_functions 📋Chrome9/1/2015 Safari9/20/2016385
Firefox: The initial implementation of arrow functions in Firefox made them automatically strict. This has been changed as of Firefox 24. The use of 'use strict'; is now required.Firefox: Before Firefox 39, a line terminator (\n) was incorrectly allowed after arrow function arguments. This has been fixed to conform to the ES2015 specification and code like () \n => {} will now throw a SyntaxError in this and later versions.Firefox for Android: The initial implementation of arrow functions in Firefox for Android made them automatically strict. This has been changed as of Firefox for Android 24. The use of 'use strict'; is now required.Firefox for Android: Before Firefox for Android 39, a line terminator (\n) was incorrectly allowed after arrow function arguments. This has been fixed to conform to the ES2015 specification and code like () \n => {} will now throw a SyntaxError in this and later versions.
javascript.functions.arrow_functions.trailing_comma Safari9/20/2016 Chrome4/19/2017211
javascript.functions.block_level_functions Chrome3/2/2016 Safari9/20/2016202
javascript.functions.default_parameters 📋Chrome3/2/2016 Safari9/20/2016202
javascript.functions.default_parameters.destructured_parameter_with_default_value_assignment Chrome3/2/2016 Safari9/20/2016202
javascript.functions.default_parameters.parameters_without_defaults_after_default_parameters Chrome3/2/2016 Safari9/20/2016202
javascript.functions.get 📋Safari10/26/2007 Chrome12/11/2008412
javascript.functions.get.computed_property_names Chrome10/13/2015 Safari3/21/2016160
javascript.functions.method_definitions 📋Chrome11/18/2014 Safari9/30/2015316
javascript.functions.method_definitions.async_generator_methods Chrome12/6/2017 Safari9/17/2018285
javascript.functions.method_definitions.async_methods Chrome12/1/2016 Safari3/27/2017116
javascript.functions.method_definitions.generator_methods_not_constructable Chrome4/14/2015 Safari3/21/2016342
javascript.functions.rest_parameters 📋Chrome12/1/2015 Safari9/20/2016294
javascript.functions.rest_parameters.destructuring Chrome3/2/2016 Safari9/20/2016202
javascript.functions.set 📋Safari10/26/2007 Chrome12/11/2008412
javascript.functions.set.computed_property_names Chrome10/13/2015 Safari3/21/2016160
javascript.grammar.array_literals 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.binary_numeric_literals 📋Chrome3/3/2015 Safari9/30/2015211
javascript.grammar.boolean_literals 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.decimal_numeric_literals 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.hashbang_comments 📋Chrome4/23/2019 Safari3/24/2020336
javascript.grammar.hexadecimal_escape_sequences 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.hexadecimal_numeric_literals 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.null_literal 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.numeric_separators 📋Chrome6/4/2019 Safari9/19/2019107
javascript.grammar.octal_numeric_literals 📋Chrome3/3/2015 Safari9/30/2015211
javascript.grammar.regular_expression_literals 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.shorthand_object_literals Chrome5/19/2015 Safari9/30/2015134
javascript.grammar.string_literals 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.template_literals 📋Chrome3/3/2015 Safari9/30/2015211
javascript.grammar.template_literals.template_literal_revision Safari9/19/2017 Chrome10/17/201728
javascript.grammar.trailing_commas 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.trailing_commas.trailing_commas_in_dynamic_import Chrome5/25/2021 Safari9/20/2021118
Node.js: The second parameter no longer throws a parser error, but the --experimental-json-modules flag is still needed to load JSON modules.
javascript.grammar.trailing_commas.trailing_commas_in_functions Safari9/20/2016 Chrome4/19/2017211
javascript.grammar.trailing_commas.trailing_commas_in_object_literals Safari10/26/2007 Chrome12/11/2008412
javascript.grammar.unicode_escape_sequences 📋Safari6/23/2003 Chrome12/11/20081998
javascript.grammar.unicode_point_escapes 📋Chrome7/21/2015 Safari9/30/201571
javascript.operators.addition 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.addition_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.async_function 📋Chrome12/1/2016 Safari3/27/2017116
javascript.operators.async_generator_function 📋Chrome12/6/2017 Safari9/17/2018285
javascript.operators.await 📋Chrome12/1/2016 Safari3/27/2017116
javascript.operators.await.top_level 📋Chrome3/2/2021 Safari9/20/2021202
Node.js: Not supported in CommonJS modules.
javascript.operators.bitwise_and 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.bitwise_and_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.bitwise_not 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.bitwise_or 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.bitwise_or_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.bitwise_xor 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.bitwise_xor_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.class 📋Safari10/22/2013 Chrome4/14/2015539
javascript.operators.comma 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.conditional 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.decrement 📋Chrome5/21/2009 Safari6/8/200918
javascript.operators.delete 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.destructuring 📋Safari10/16/2014 Chrome3/2/2016503
Firefox: Firefox provided a non-standard destructuring implementation from Firefox 2 to 40.Firefox for Android: Firefox for Android provided a non-standard destructuring implementation from Firefox for Android 4 to 40.
javascript.operators.destructuring.computed_property_names Chrome3/2/2016 Safari9/20/2016202
javascript.operators.destructuring.rest_in_arrays Chrome3/2/2016 Safari3/21/201619
javascript.operators.destructuring.rest_in_objects Chrome7/25/2017 Safari4/12/2018261
javascript.operators.division 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.division_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.equality 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.exponentiation 📋Chrome7/20/2016 Safari3/27/2017250
javascript.operators.exponentiation_assignment 📋Chrome7/20/2016 Safari3/27/2017250
javascript.operators.function 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.function.trailing_comma Safari9/20/2016 Chrome4/19/2017211
javascript.operators.generator_function 📋Chrome3/2/2016 Safari9/20/2016202
javascript.operators.generator_function.trailing_comma Safari9/20/2016 Chrome4/19/2017211
javascript.operators.greater_than 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.greater_than_or_equal 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.grouping 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.import 📋Chrome12/6/2017 Safari4/12/2018127
Deno: Bundled Deno applications (using deno compile) do not support dynamic importsNode.js: Dynamic import can be used in either CommonJS or ES module files, to import either CommonJS or ES module files. See Node's ECMAScript Modules documentation for more details.Node.js: Dynamic import can be used in either CommonJS or ES module files, to import either CommonJS or ES module files. See Node's ECMAScript Modules documentation for more details.
javascript.operators.import.options_parameter Chrome5/25/2021 Safari9/20/2021118
Node.js: The second parameter no longer throws a parser error, but the --experimental-json-modules flag is still needed to load JSON modules.
javascript.operators.import.worker_support Chrome2/4/2020 Safari9/20/2021594
javascript.operators.import_meta 📋Chrome1/23/2018 Safari4/12/201879
javascript.operators.import_meta.resolve 📋Chrome9/2/2022 Safari3/27/2023206
Node.js: Returns a URL object instead of a string.
javascript.operators.in 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.increment 📋Chrome5/21/2009 Safari6/8/200918
javascript.operators.inequality 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.instanceof 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.left_shift 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.left_shift_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.less_than 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.less_than_or_equal 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.logical_and 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.logical_and_assignment 📋Chrome8/25/2020 Safari9/16/202022
javascript.operators.logical_not 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.logical_or 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.logical_or_assignment 📋Chrome8/25/2020 Safari9/16/202022
javascript.operators.multiplication 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.multiplication_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.new 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.new_target 📋Chrome10/13/2015 Safari9/19/2017707
javascript.operators.null 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.nullish_coalescing 📋Chrome2/4/2020 Safari3/24/202049
javascript.operators.nullish_coalescing_assignment 📋Chrome8/25/2020 Safari9/16/202022
javascript.operators.object_initializer 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.object_initializer.computed_property_names Safari10/16/2014 Chrome12/1/2015411
javascript.operators.object_initializer.shorthand_method_names Safari9/30/2015 Chrome12/1/201562
javascript.operators.object_initializer.shorthand_property_names Safari9/30/2015 Chrome12/1/201562
javascript.operators.object_initializer.spread_properties Chrome7/25/2017 Safari4/12/2018261
javascript.operators.optional_chaining 📋Chrome2/4/2020 Safari3/24/202049
javascript.operators.property_accessors 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.remainder 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.remainder_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.right_shift 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.right_shift_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.spread 📋Safari10/16/2014 Chrome10/13/2015362
javascript.operators.spread.spread_in_arrays 📋Safari10/16/2014 Chrome10/13/2015362
javascript.operators.spread.spread_in_function_calls 📋Safari10/16/2014 Chrome10/13/2015362
javascript.operators.spread.spread_in_object_literals 📋Chrome7/25/2017 Safari4/12/2018261
javascript.operators.strict_equality 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.strict_inequality 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.subtraction 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.subtraction_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.super 📋Safari10/22/2013 Chrome4/14/2015539
javascript.operators.this 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.typeof 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.unary_negation 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.unary_plus 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.unsigned_right_shift 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.unsigned_right_shift_assignment 📋Safari6/23/2003 Chrome12/11/20081998
javascript.operators.void 📋Safari3/18/2008 Chrome12/11/2008268
javascript.operators.yield 📋Chrome11/18/2014 Safari9/20/2016672
Firefox: Starting with Firefox 33, the parsing of the yield expression has been updated to conform with the ES2015 specification.Firefox: Starting with Firefox 29, an IteratorResult object returned for completed generator function.Firefox for Android: Starting with Firefox for Android 33, the parsing of the yield expression has been updated to conform with the ES2015 specification.Firefox for Android: Starting with Firefox for Android 29, an IteratorResult object returned for completed generator function.
javascript.operators.yield_star 📋Chrome11/18/2014 Safari9/20/2016672
Firefox: Starting with Firefox 33, the parsing of the yield expression has been updated to conform with the ES2015 specification.Firefox for Android: Starting with Firefox for Android 33, the parsing of the yield expression has been updated to conform with the ES2015 specification.
javascript.regular_expressions.backreference 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.capturing_group 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.character_class 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.character_class_escape 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.character_escape 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.character_escape.unicode Chrome4/13/2016 Safari9/20/2016160
javascript.regular_expressions.disjunction 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.input_boundary_assertion 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.literal_character 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.lookahead_assertion 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.lookbehind_assertion 📋Chrome10/17/2017 Safari3/27/20231987
javascript.regular_expressions.named_backreference 📋Chrome1/23/2018 Safari4/12/201879
javascript.regular_expressions.named_capturing_group 📋Chrome1/23/2018 Safari4/12/201879
javascript.regular_expressions.named_capturing_group.duplicate_named_capturing_groups Safari9/18/2023 Chrome5/14/2024239
javascript.regular_expressions.non_capturing_group 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.quantifier 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.unicode_character_class_escape 📋Chrome1/23/2018 Safari4/12/201879
javascript.regular_expressions.wildcard 📋Safari6/23/2003 Chrome12/11/20081998
javascript.regular_expressions.word_boundary_assertion 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.async_function 📋Chrome12/1/2016 Safari3/27/2017116
javascript.statements.async_generator_function 📋Chrome12/6/2017 Safari9/17/2018285
javascript.statements.block 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.break 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.class 📋Chrome3/2/2016 Safari3/27/2017390
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.statements.const 📋Safari7/20/2011 Chrome7/31/2012377
Firefox: Before Firefox 13, const is implemented, but re-assignment is not failing.Firefox: Before Firefox 46, a TypeError was thrown on redeclaration instead of a SyntaxError.Firefox for Android: Before Firefox for Android 14, const is implemented, but re-assignment is not failing.Firefox for Android: Before Firefox for Android 46, a TypeError was thrown on redeclaration instead of a SyntaxError.
javascript.statements.continue 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.debugger 📋Chrome5/25/2010 Safari6/7/201013
javascript.statements.do_while 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.empty 📋Chrome9/15/2009 Safari6/7/2010265
javascript.statements.export 📋Safari3/27/2017 Chrome9/5/2017162
Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.
javascript.statements.export.default 📋Safari3/27/2017 Chrome9/5/2017162
Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.
javascript.statements.export.namespace 📋Chrome1/29/2019 Safari4/26/2021818
Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.
javascript.statements.for 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.for_await_of 📋Chrome12/6/2017 Safari9/17/2018285
javascript.statements.for_in 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.for_of 📋Safari10/22/2013 Chrome10/7/2014350
Firefox: Before Firefox 51, using the for...of loop construct with the const keyword threw a SyntaxError ("missing = in const declaration").Firefox for Android: Before Firefox for Android 51, using the for...of loop construct with the const keyword threw a SyntaxError ("missing = in const declaration").
javascript.statements.for_of.async_iterators Safari10/22/2013 Chrome12/6/20171506
javascript.statements.for_of.closing_iterators Safari10/22/2013 Chrome5/25/2016946
javascript.statements.function 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.function.trailing_comma_in_parameters Safari9/20/2016 Chrome4/19/2017211
javascript.statements.generator_function 📋Chrome11/18/2014 Safari9/20/2016672
javascript.statements.generator_function.IteratorResult_object Chrome3/2/2016 Safari9/20/2016202
javascript.statements.generator_function.not_constructable_with_new Chrome4/13/2016 Safari9/20/2016160
javascript.statements.generator_function.trailing_comma_in_parameters Safari9/20/2016 Chrome4/19/2017211
javascript.statements.if_else 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.import 📋Safari3/27/2017 Chrome9/5/2017162
Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.
javascript.statements.import.import_attributes 📋Safari12/11/2023 Chrome3/19/202499
javascript.statements.import.import_attributes.type_json Safari12/11/2023 Chrome3/19/202499
javascript.statements.import.service_worker_support Chrome5/25/2021 Safari9/20/2021118
javascript.statements.import.worker_support Chrome2/4/2020 Safari9/20/2021594
javascript.statements.label 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.let 📋Chrome3/2/2016 Safari9/20/2016202
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Edge: In Edge 12 and 13, let within a for loop initializer does not create a separate variable for each loop iteration as defined by ES2015. Instead, it behaves as though the loop were wrapped in a scoping block with the let immediately before the loop.Firefox: Before Firefox 44, let is only available to code blocks in HTML wrapped in a <script type="application/javascript;version=1.7"> block (or higher version) and has different semantics (e.g. no temporal dead zone).Firefox: Before Firefox 46, a TypeError is thrown on redeclaration instead of a SyntaxError.Firefox: Firefox 54 adds support of let in workers.Firefox for Android: Before Firefox for Android 44, let is only available to code blocks in HTML wrapped in a <script type="application/javascript;version=1.7"> block (or higher version) and has different semantics (e.g. no temporal dead zone).Firefox for Android: Before Firefox for Android 46, a TypeError is thrown on redeclaration instead of a SyntaxError.Firefox for Android: Firefox for Android 54 adds support of let in workers.Internet Explorer: In Internet Explorer, let within a for loop initializer does not create a separate variable for each loop iteration as defined by ES2015. Instead, it behaves as though the loop were wrapped in a scoping block with the let immediately before the loop.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.statements.return 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.switch 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.throw 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.try_catch 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.try_catch.optional_catch_binding Safari4/12/2018 Chrome4/17/20185
javascript.statements.var 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.while 📋Safari6/23/2003 Chrome12/11/20081998
javascript.statements.with 📋Safari6/23/2003 Chrome12/11/20081998