For a given set of browsers, what APIs are not yet in all of them.
| Not in Chrome | Not in Safari | |
|---|---|---|
| In Chrome | 462 | |
| In Safari | 94 |
Below is a list of features that are not in all of Chrome and Safari
| API | First Browser | Date | Days in Limbo | Notes |
|---|---|---|---|---|
| css.at-rules.counter-style.speak-as 📋 | Chrome | 5/25/2021 | 1932 | |
| css.at-rules.font-face.OpenType_CBDT_CBLC | Chrome | 4/17/2018 | 3066 | |
| css.at-rules.font-face.OpenType_COLRv1 | Chrome | 2/1/2022 | 1680 | |
| css.at-rules.font-face.OpenType_SVG | Safari | 3/25/2019 | 2724 | |
| css.at-rules.font-face.SVG_fonts | Safari | 3/18/2008 | 6748 | |
| css.at-rules.font-face.ascent-override 📋 | Chrome | 11/17/2020 | 2121 | |
| css.at-rules.font-face.descent-override 📋 | Chrome | 11/17/2020 | 2121 | |
| css.at-rules.font-face.font-feature-settings 📋 | Safari | 9/20/2016 | 3640 | Firefox: The ISO/IEC CD 14496-22 3rd edition suggests using the ssty feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the dtls feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS.Firefox: From Firefox 4 to Firefox 14 (inclusive), Firefox supported an older, slightly different syntax. See OpenType Font Feature support in Firefox 4.Firefox for Android: The ISO/IEC CD 14496-22 3rd edition suggests using the ssty feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox for Android 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the dtls feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox for Android 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS.Firefox for Android: From Firefox for Android 4 to Firefox for Android 14 (inclusive), Firefox for Android supported an older, slightly different syntax. See OpenType Font Feature support in Firefox for Android 4. |
| css.at-rules.font-face.line-gap-override 📋 | Chrome | 11/17/2020 | 2121 | |
| css.at-rules.font-face.src.drop_invalid_item | Chrome | 11/29/2022 | 1379 | Chrome: Chrome drops invalid item for tech() but not other invalid valuesChrome Android: Chrome Android drops invalid item for tech() but not other invalid valuesEdge: Edge drops invalid item for tech() but not other invalid valuesOpera: Opera drops invalid item for tech() but not other invalid valuesOpera Android: Opera Android drops invalid item for tech() but not other invalid valuesSamsung Internet: Samsung Internet drops invalid item for tech() but not other invalid valuesWebView Android: WebView Android drops invalid item for tech() but not other invalid values |
| css.at-rules.import.supports 📋 | Chrome | 2/20/2024 | 931 | |
| css.at-rules.keyframes.named_range_keyframes 📋 | Chrome | 7/18/2023 | 1148 | |
| css.at-rules.media.-webkit-animation | Safari | 6/8/2009 | 6301 | |
| css.at-rules.media.-webkit-transform-2d | Safari | 6/8/2009 | 6301 | |
| css.at-rules.media.-webkit-transition | Safari | 6/8/2009 | 6301 | |
| css.at-rules.media.display-mode.picture-in-picture 📋 | Chrome | 3/19/2024 | 903 | |
| css.at-rules.media.inverted-colors 📋 | Safari | 3/21/2016 | 3823 | |
| css.at-rules.media.media_query_values | Chrome | 4/17/2018 | 3066 | |
| css.at-rules.media.prefers-color-scheme.respects-inherited-scheme | Chrome | 9/17/2024 | 721 | Chrome: Only supports SVG images, not iframes.Chrome Android: Only supports SVG images, not iframes.Edge: Only supports SVG images, not iframes.Opera: Only supports SVG images, not iframes.Opera Android: Only supports SVG images, not iframes.Samsung Internet: Only supports SVG images, not iframes.WebView Android: Only supports SVG images, not iframes. |
| css.at-rules.media.prefers-reduced-data 📋 | Chrome | 8/25/2020 | 2205 | |
| css.at-rules.media.prefers-reduced-transparency 📋 | Chrome | 10/10/2023 | 1064 | |
| css.at-rules.media.video-dynamic-range 📋 | Chrome | 2/1/2022 | 1680 | |
| css.at-rules.page.bottom-center 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.bottom-left 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.bottom-left-corner 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.bottom-right 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.bottom-right-corner 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.left-bottom 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.left-middle 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.left-top 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.page-orientation 📋 | Chrome | 8/25/2020 | 2205 | |
| css.at-rules.page.right-bottom 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.right-middle 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.right-top 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.top-center 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.top-left 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.top-left-corner 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.top-right 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.page.top-right-corner 📋 | Chrome | 11/12/2024 | 665 | |
| css.at-rules.position-try 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.-webkit-app-region | Chrome | 1/10/2013 | 4989 | |
| css.properties.-webkit-column-axis | Safari | 7/25/2012 | 5158 | |
| css.properties.-webkit-column-progression | Safari | 10/22/2013 | 4704 | |
| css.properties.-webkit-cursor-visibility | Safari | 10/22/2013 | 4704 | |
| css.properties.-webkit-hyphenate-limit-after | Safari | 7/20/2011 | 5529 | |
| css.properties.-webkit-hyphenate-limit-before | Safari | 7/20/2011 | 5529 | |
| css.properties.-webkit-hyphenate-limit-lines | Safari | 7/25/2012 | 5158 | |
| css.properties.-webkit-line-align | Safari | 7/25/2012 | 5158 | |
| css.properties.-webkit-line-box-contain | Safari | 7/20/2011 | 5529 | |
| css.properties.-webkit-line-grid | Safari | 7/25/2012 | 5158 | |
| css.properties.-webkit-line-snap | Safari | 7/25/2012 | 5158 | |
| css.properties.-webkit-mask-source-type | Safari | 10/22/2013 | 4704 | |
| css.properties.-webkit-nbsp-mode | Safari | 6/8/2009 | 6301 | |
| css.properties.-webkit-tap-highlight-color | Chrome | 12/13/2011 | 5383 | |
| css.properties.-webkit-text-decorations-in-effect | Chrome | 12/11/2008 | 6480 | |
| css.properties.-webkit-text-zoom | Safari | 9/20/2016 | 3640 | |
| css.properties.align-content.flex_context.last_baseline | Safari | 9/19/2017 | 3276 | Safari: This value is recognized, but has no effect. See bug 235005.Safari on iOS: This value is recognized, but has no effect. See bug 235005.WebView on iOS: This value is recognized, but has no effect. See bug 235005. |
| css.properties.align-items.anchor-center 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.align-self.anchor-center 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.align-self.position_absolute_context 📋 | Chrome | 2/20/2024 | 931 | |
| css.properties.anchor-name 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.anchor-name.none 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.anchor-scope 📋 | Chrome | 11/12/2024 | 665 | |
| css.properties.anchor-scope.all 📋 | Chrome | 11/12/2024 | 665 | |
| css.properties.anchor-scope.none 📋 | Chrome | 11/12/2024 | 665 | |
| css.properties.animation.animation-timeline_included | Chrome | 7/18/2023 | 1148 | Chrome: Support is currently reset-only. Including animation resets a previously-declared animation-timeline value to auto, but animation-timeline cannot be set via animation.Chrome Android: Support is currently reset-only. Including animation resets a previously-declared animation-timeline value to auto, but animation-timeline cannot be set via animation.Edge: Support is currently reset-only. Including animation resets a previously-declared animation-timeline value to auto, but animation-timeline cannot be set via animation.Opera: Support is currently reset-only. Including animation resets a previously-declared animation-timeline value to auto, but animation-timeline cannot be set via animation.Opera Android: Support is currently reset-only. Including animation resets a previously-declared animation-timeline value to auto, but animation-timeline cannot be set via animation.Samsung Internet: Support is currently reset-only. Including animation resets a previously-declared animation-timeline value to auto, but animation-timeline cannot be set via animation.WebView Android: Support is currently reset-only. Including animation resets a previously-declared animation-timeline value to auto, but animation-timeline cannot be set via animation. |
| css.properties.animation-duration.auto 📋 | Chrome | 7/18/2023 | 1148 | Firefox: Firefox does not currently support the auto value and only accepts values in seconds or milliseconds. It's recommended that 1ms is used until auto is supported.Firefox for Android: Firefox for Android does not currently support the auto value and only accepts values in seconds or milliseconds. It's recommended that 1ms is used until auto is supported. |
| css.properties.animation-range 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.animation-range-end 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.animation-range-end.normal 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.animation-range-start 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.animation-range-start.normal 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.animation-timeline 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.animation-timeline.scroll 📋 | Chrome | 7/18/2023 | 1148 | Firefox: Zero scroll range is treated as 100% but should be 0% (see bug 1780865).Firefox: Supports the deprecated horizontal and vertical axis values, and not the x and y values. |
| css.properties.animation-timeline.view 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.background-clip.border-area 📋 | Safari | 12/11/2024 | 636 | |
| css.properties.background-position-x.side-relative_values | Safari | 3/14/2022 | 1639 | |
| css.properties.background-position-y.side-relative_values | Safari | 3/14/2022 | 1639 | |
| css.properties.baseline-source 📋 | Chrome | 3/7/2023 | 1281 | |
| css.properties.baseline-source.auto 📋 | Chrome | 3/7/2023 | 1281 | |
| css.properties.baseline-source.first 📋 | Chrome | 3/7/2023 | 1281 | |
| css.properties.baseline-source.last 📋 | Chrome | 3/7/2023 | 1281 | |
| css.properties.block-size.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.bottom.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.bottom.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.box-flex-group | Safari | 10/26/2007 | 6892 | |
| css.properties.box-lines | Safari | 10/26/2007 | 6892 | |
| css.properties.break-after.multicol_context 📋 | Chrome | 4/13/2016 | 3800 | Firefox: Only supported in print mode. See bug 1675322.Firefox for Android: Only supported in print mode. See bug 1675322. |
| css.properties.break-after.multicol_context.avoid | Chrome | 5/24/2022 | 1568 | |
| css.properties.break-after.multicol_context.avoid-column | Chrome | 5/24/2022 | 1568 | |
| css.properties.break-after.multicol_context.column | Chrome | 4/13/2016 | 3800 | |
| css.properties.break-before.multicol_context 📋 | Chrome | 4/13/2016 | 3800 | Firefox: Only supported in print mode. See bug 1675322.Firefox for Android: Only supported in print mode. See bug 1675322. |
| css.properties.break-before.multicol_context.avoid | Chrome | 5/24/2022 | 1568 | |
| css.properties.break-before.multicol_context.avoid-column | Chrome | 5/24/2022 | 1568 | |
| css.properties.break-before.multicol_context.column | Chrome | 5/25/2016 | 3758 | |
| css.properties.break-inside.paged_context.avoid-page | Chrome | 5/25/2016 | 3758 | |
| css.properties.clip-path.is_animatable | Chrome | 12/1/2016 | 3568 | |
| css.properties.color-adjust 📋 | Safari | 3/14/2022 | 1639 | |
| css.properties.container-type.scroll-state 📋 | Chrome | 2/4/2025 | 581 | |
| css.properties.custom-property.env.titlebar-area-height 📋 | Chrome | 8/31/2021 | 1834 | Chrome: Before version 93, Linux is unsupported.Chrome Android: Before version 93, Linux is unsupported.Edge: Before version 93, Linux is unsupported. |
| css.properties.custom-property.env.titlebar-area-width 📋 | Chrome | 8/31/2021 | 1834 | Chrome: Before version 93, Linux is unsupported.Chrome Android: Before version 93, Linux is unsupported.Edge: Before version 93, Linux is unsupported. |
| css.properties.custom-property.env.titlebar-area-x 📋 | Chrome | 8/31/2021 | 1834 | Chrome: Before version 93, Linux is unsupported.Chrome Android: Before version 93, Linux is unsupported.Edge: Before version 93, Linux is unsupported. |
| css.properties.custom-property.env.titlebar-area-y 📋 | Chrome | 8/31/2021 | 1834 | Chrome: Before version 93, Linux is unsupported.Chrome Android: Before version 93, Linux is unsupported.Edge: Before version 93, Linux is unsupported. |
| css.properties.d 📋 | Chrome | 2/4/2020 | 2408 | Safari: The property parses, but has no effect.Safari on iOS: The property parses, but has no effect.WebView on iOS: The property parses, but has no effect. |
| css.properties.display.contents.contents_unusual | Chrome | 3/6/2018 | 3108 | |
| css.properties.display.list-item.legend-support | Chrome | 12/4/2018 | 2835 | |
| css.properties.display.math | Chrome | 1/10/2023 | 1337 | |
| css.properties.display.none.option_is_hidden | Chrome | 12/11/2008 | 6480 | |
| css.properties.display.ruby | Chrome | 1/23/2024 | 959 | |
| css.properties.display.ruby-text | Chrome | 1/23/2024 | 959 | |
| css.properties.field-sizing 📋 | Chrome | 3/19/2024 | 903 | |
| css.properties.field-sizing.content 📋 | Chrome | 3/19/2024 | 903 | |
| css.properties.field-sizing.fixed 📋 | Chrome | 3/19/2024 | 903 | |
| css.properties.filter.svg_elements | Chrome | 3/2/2021 | 2016 | |
| css.properties.flex-grow.less_than_zero_animate | Chrome | 3/2/2016 | 3842 | Firefox: Before Firefox 32, Firefox wasn't able to animate values starting or stopping at 0.Firefox for Android: Before Firefox for Android 32, Firefox for Android wasn't able to animate values starting or stopping at 0. |
| css.properties.font-family.math | Chrome | 1/10/2023 | 1337 | |
| css.properties.font-family.ui-monospace | Safari | 3/24/2020 | 2359 | |
| css.properties.font-family.ui-rounded | Safari | 3/24/2020 | 2359 | |
| css.properties.font-family.ui-sans-serif | Safari | 3/24/2020 | 2359 | |
| css.properties.font-family.ui-serif | Safari | 3/24/2020 | 2359 | |
| css.properties.font-palette.animation_computed | Chrome | 1/23/2024 | 959 | |
| css.properties.font-palette.palette-mix_function 📋 | Chrome | 1/23/2024 | 959 | |
| css.properties.font-size.math | Chrome | 1/10/2023 | 1337 | |
| css.properties.font-variant-emoji.emoji 📋 | Chrome | 11/12/2024 | 665 | |
| css.properties.font-variant-emoji.normal 📋 | Chrome | 11/12/2024 | 665 | |
| css.properties.font-variant-emoji.text 📋 | Chrome | 11/12/2024 | 665 | |
| css.properties.font-variant-emoji.unicode 📋 | Chrome | 11/12/2024 | 665 | |
| css.properties.font-variant-position 📋 | Safari | 3/21/2016 | 3823 | Chrome: The property is recognized, but has no effect.Chrome Android: The property is recognized, but has no effect.Edge: The property is recognized, but has no effect.Quest Browser: The property is recognized, but has no effect.Opera: The property is recognized, but has no effect.Opera Android: The property is recognized, but has no effect.Samsung Internet: The property is recognized, but has no effect.WebView Android: The property is recognized, but has no effect. |
| css.properties.font-variant-position.normal 📋 | Safari | 3/24/2020 | 2359 | Chrome: The property is recognized, but has no effect.Chrome Android: The property is recognized, but has no effect.Edge: The property is recognized, but has no effect.Quest Browser: The property is recognized, but has no effect.Opera: The property is recognized, but has no effect.Opera Android: The property is recognized, but has no effect.Samsung Internet: The property is recognized, but has no effect.WebView Android: The property is recognized, but has no effect. |
| css.properties.font-variant-position.sub 📋 | Safari | 3/24/2020 | 2359 | Chrome: The property is recognized, but has no effect.Chrome Android: The property is recognized, but has no effect.Edge: The property is recognized, but has no effect.Quest Browser: The property is recognized, but has no effect.Opera: The property is recognized, but has no effect.Opera Android: The property is recognized, but has no effect.Samsung Internet: The property is recognized, but has no effect.WebView Android: The property is recognized, but has no effect. |
| css.properties.font-variant-position.super 📋 | Safari | 3/24/2020 | 2359 | Chrome: The property is recognized, but has no effect.Chrome Android: The property is recognized, but has no effect.Edge: The property is recognized, but has no effect.Quest Browser: The property is recognized, but has no effect.Opera: The property is recognized, but has no effect.Opera Android: The property is recognized, but has no effect.Samsung Internet: The property is recognized, but has no effect.WebView Android: The property is recognized, but has no effect. |
| css.properties.forced-color-adjust 📋 | Chrome | 3/2/2021 | 2016 | |
| css.properties.forced-color-adjust.auto 📋 | Chrome | 3/2/2021 | 2016 | |
| css.properties.forced-color-adjust.none 📋 | Chrome | 3/2/2021 | 2016 | |
| css.properties.forced-color-adjust.preserve-parent-color 📋 | Chrome | 9/27/2022 | 1442 | |
| css.properties.glyph-orientation-vertical 📋 | Safari | 3/24/2020 | 2359 | |
| css.properties.hanging-punctuation 📋 | Safari | 9/20/2016 | 3640 | Safari: The characters U+0027 and U+0022 are not supported by the first and last keywords.Safari on iOS: The characters U+0027 and U+0022 are not supported by the first and last keywords.WebView on iOS: The characters U+0027 and U+0022 are not supported by the first and last keywords. |
| css.properties.hanging-punctuation.allow-end 📋 | Safari | 3/24/2020 | 2359 | |
| css.properties.hanging-punctuation.first 📋 | Safari | 3/24/2020 | 2359 | |
| css.properties.hanging-punctuation.last 📋 | Safari | 3/24/2020 | 2359 | |
| css.properties.hanging-punctuation.none 📋 | Safari | 3/24/2020 | 2359 | |
| css.properties.height.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.hyphenate-limit-chars 📋 | Chrome | 1/10/2023 | 1337 | |
| css.properties.hyphenate-limit-chars.auto 📋 | Chrome | 1/10/2023 | 1337 | |
| css.properties.hyphens.language_afrikaans | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_albanian | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_amharic | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_armenian | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_assamese | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_basque | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_belarusian | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_bengali | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_bulgarian | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_catalan | Safari | 7/20/2011 | 5529 | |
| css.properties.hyphens.language_cyrillic_mongolian | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_estonian | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_ethiopic_script_mul | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_ethiopic_script_und | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_finnish | Safari | 3/21/2016 | 3823 | |
| css.properties.hyphens.language_galician | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_georgian | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_german_swiss_orthography | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_german_traditional_orthography | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_gujarati | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_hindi | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_irish | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_kannada | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_latin | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_latvian | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_lithuanian | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_malayalam | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_marathi | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_modern_greek | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_norwegian_nn | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_old_slavonic | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_oriya | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_polish | Safari | 3/21/2016 | 3823 | |
| css.properties.hyphens.language_punjabi | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_slovak | Chrome | 4/4/2023 | 1253 | |
| css.properties.hyphens.language_slovenian | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_tamil | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_telugu | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_turkish | Safari | 7/20/2011 | 5529 | |
| css.properties.hyphens.language_turkmen | Chrome | 11/17/2020 | 2121 | |
| css.properties.hyphens.language_welsh | Chrome | 11/17/2020 | 2121 | |
| css.properties.image-rendering.optimizeQuality | Safari | 10/22/2013 | 4704 | |
| css.properties.image-rendering.optimizeSpeed | Safari | 10/22/2013 | 4704 | |
| css.properties.inline-size.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.inset.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.inset.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.inset-block.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.inset-block.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.inset-block-end.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.inset-block-end.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.inset-block-start.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.inset-block-start.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.inset-inline.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.inset-inline.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.inset-inline-end.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.inset-inline-end.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.inset-inline-start.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.inset-inline-start.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.interpolate-size 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.interpolate-size.allow-keywords 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.interpolate-size.numeric-only 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.justify-items.anchor-center 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.justify-self.anchor-center 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.justify-self.position_absolute_context 📋 | Chrome | 2/20/2024 | 931 | |
| css.properties.left.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.left.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.line-clamp.none | Safari | 12/11/2024 | 636 | |
| css.properties.line-height-step 📋 | Chrome | 7/25/2017 | 3332 | |
| css.properties.margin.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-block.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-block-end.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-block-start.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-bottom.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-inline.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-inline-end.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-inline-start.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-left.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-right.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-top.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.margin-trim 📋 | Safari | 3/27/2023 | 1261 | |
| css.properties.margin-trim.block 📋 | Safari | 3/27/2023 | 1261 | |
| css.properties.margin-trim.block-end 📋 | Safari | 3/27/2023 | 1261 | |
| css.properties.margin-trim.block-start 📋 | Safari | 3/27/2023 | 1261 | |
| css.properties.margin-trim.inline 📋 | Safari | 3/27/2023 | 1261 | |
| css.properties.margin-trim.inline-end 📋 | Safari | 3/27/2023 | 1261 | |
| css.properties.margin-trim.inline-start 📋 | Safari | 3/27/2023 | 1261 | |
| css.properties.margin-trim.none 📋 | Safari | 3/27/2023 | 1261 | |
| css.properties.mask-origin.fill-box | Chrome | 12/5/2023 | 1008 | |
| css.properties.mask-origin.stroke-box | Chrome | 12/5/2023 | 1008 | |
| css.properties.mask-origin.view-box | Chrome | 12/5/2023 | 1008 | |
| css.properties.math-depth 📋 | Chrome | 1/10/2023 | 1337 | |
| css.properties.math-shift 📋 | Chrome | 1/10/2023 | 1337 | |
| css.properties.max-block-size.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.max-height.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.max-height.stretch 📋 | Chrome | 7/9/2013 | 4809 | |
| css.properties.max-inline-size.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.max-width.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.max-width.stretch 📋 | Chrome | 9/25/2012 | 5096 | |
| css.properties.min-block-size.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.min-height.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.min-inline-size.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.min-width.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.min-width.stretch | Chrome | 9/25/2012 | 5096 | |
| css.properties.mix-blend-mode.plus-darker 📋 | Safari | 3/24/2020 | 2359 | |
| css.properties.mix-blend-mode.svg_elements | Chrome | 3/3/2015 | 4207 | |
| css.properties.object-view-box 📋 | Chrome | 8/2/2022 | 1498 | |
| css.properties.object-view-box.none 📋 | Chrome | 8/2/2022 | 1498 | |
| css.properties.offset-path.margin-box 📋 | Safari | 9/16/2024 | 722 | |
| css.properties.overflow-anchor 📋 | Chrome | 1/25/2017 | 3513 | |
| css.properties.overflow-anchor.auto 📋 | Chrome | 1/25/2017 | 3513 | |
| css.properties.overflow-anchor.none 📋 | Chrome | 1/25/2017 | 3513 | |
| css.properties.overflow-clip-margin 📋 | Chrome | 4/13/2021 | 1974 | Chrome: Only works when both axes are using overflow: clip. See bug 40235584.Chrome Android: Only works when both axes are using overflow: clip. See bug 40235584.Edge: Only works when both axes are using overflow: clip. See bug 40235584.Firefox: Only supports using a length, not a visual box. See bug 1661582.Firefox for Android: Only supports using a length, not a visual box. See bug 1661582.Quest Browser: Only works when both axes are using overflow: clip. See bug 40235584.Opera: Only works when both axes are using overflow: clip. See bug 40235584.Opera Android: Only works when both axes are using overflow: clip. See bug 40235584.Samsung Internet: Only works when both axes are using overflow: clip. See bug 40235584.WebView Android: Only works when both axes are using overflow: clip. See bug 40235584. |
| css.properties.overflow-clip-margin.border-box 📋 | Chrome | 8/2/2022 | 1498 | |
| css.properties.overflow-clip-margin.content-box 📋 | Chrome | 8/2/2022 | 1498 | |
| css.properties.overflow-clip-margin.padding-box 📋 | Chrome | 8/2/2022 | 1498 | |
| css.properties.overlay 📋 | Chrome | 9/12/2023 | 1092 | |
| css.properties.overlay.auto 📋 | Chrome | 9/12/2023 | 1092 | |
| css.properties.overlay.none 📋 | Chrome | 9/12/2023 | 1092 | |
| css.properties.page-break-after.avoid 📋 | Chrome | 12/11/2008 | 6480 | |
| css.properties.page-break-before.avoid 📋 | Chrome | 12/11/2008 | 6480 | |
| css.properties.place-items.anchor-center 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.place-self.anchor-center 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.place-self.position_absolute_context 📋 | Chrome | 2/20/2024 | 931 | |
| css.properties.position-anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-anchor.auto 📋 | Chrome | 5/14/2024 | 847 | Chrome: The generic auto value exists, but it does not yet have the effect described in the spec.Chrome Android: The generic auto value exists, but it does not yet have the effect described in the spec.Edge: The generic auto value exists, but it does not yet have the effect described in the spec.Opera: The generic auto value exists, but it does not yet have the effect described in the spec.Opera Android: The generic auto value exists, but it does not yet have the effect described in the spec.Samsung Internet: The generic auto value exists, but it does not yet have the effect described in the spec.WebView Android: The generic auto value exists, but it does not yet have the effect described in the spec. |
| css.properties.position-area 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.block-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.block-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.bottom 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.center 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.inline-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.inline-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.left 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.none 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.right 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.self-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.self-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-all 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-block-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-block-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-bottom 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-inline-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-inline-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-top 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-x-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-x-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-y-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.span-y-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.top 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.x-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.x-self-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.x-self-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.x-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.y-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.y-self-end 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.y-self-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-area.y-start 📋 | Chrome | 9/17/2024 | 721 | |
| css.properties.position-try 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-try-fallbacks 📋 | Chrome | 8/20/2024 | 749 | |
| css.properties.position-try-fallbacks.flip-block 📋 | Chrome | 8/20/2024 | 749 | |
| css.properties.position-try-fallbacks.flip-inline 📋 | Chrome | 8/20/2024 | 749 | |
| css.properties.position-try-fallbacks.flip-start 📋 | Chrome | 8/20/2024 | 749 | |
| css.properties.position-try-fallbacks.none 📋 | Chrome | 8/20/2024 | 749 | |
| css.properties.position-try-fallbacks.position-area 📋 | Chrome | 8/20/2024 | 749 | Chrome: inset-area values had to be wrapped inside an inset-area() function.Chrome Android: inset-area values had to be wrapped inside an inset-area() function.Edge: inset-area values had to be wrapped inside an inset-area() function.Opera: inset-area values had to be wrapped inside an inset-area() function.Opera Android: inset-area values had to be wrapped inside an inset-area() function.Samsung Internet: inset-area values had to be wrapped inside an inset-area() function.WebView Android: inset-area values had to be wrapped inside an inset-area() function. |
| css.properties.position-try-order 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-try-order.most-block-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-try-order.most-height 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-try-order.most-inline-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-try-order.most-width 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-try-order.normal 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-visibility 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-visibility.always 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-visibility.anchors-visible 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.position-visibility.no-overflow 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.print-color-adjust.economy 📋 | Safari | 7/25/2012 | 5158 | |
| css.properties.print-color-adjust.exact 📋 | Safari | 7/25/2012 | 5158 | |
| css.properties.reading-flow 📋 | Chrome | 8/20/2024 | 749 | |
| css.properties.right.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.right.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.ruby-overhang 📋 | Safari | 12/11/2024 | 636 | |
| css.properties.ruby-overhang.auto 📋 | Safari | 12/11/2024 | 636 | |
| css.properties.ruby-overhang.none 📋 | Safari | 12/11/2024 | 636 | |
| css.properties.rx 📋 | Chrome | 2/4/2020 | 2408 | Safari: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090.Safari on iOS: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090.WebView on iOS: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090. |
| css.properties.ry 📋 | Chrome | 2/4/2020 | 2408 | Safari: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090.Safari on iOS: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090.WebView on iOS: The value is recognized, but has no effect. This property is only recognized as an attribute applied to the SVG element. See bug 266090. |
| css.properties.scroll-initial-target 📋 | Chrome | 2/4/2025 | 581 | |
| css.properties.scroll-initial-target.nearest 📋 | Chrome | 2/4/2025 | 581 | |
| css.properties.scroll-initial-target.none 📋 | Chrome | 2/4/2025 | 581 | |
| css.properties.scroll-timeline 📋 | Chrome | 7/18/2023 | 1148 | Firefox: The syntax of the shorthand property uses the fixed order of name and then the axis.Firefox: Supports the deprecated horizontal and vertical axis values, and not the x and y values.Firefox: The @scroll-timeline at-rule is replaced with the longhand properties scroll-timeline-name and scroll-timeline-axis and the shorthand property scroll-timeline. |
| css.properties.scroll-timeline-axis 📋 | Chrome | 7/18/2023 | 1148 | Firefox: The syntax of the shorthand property uses the fixed order of name and then the axis.Firefox: Supports the deprecated horizontal and vertical values, and not the x and y values.Firefox: The @scroll-timeline at-rule is replaced with the longhand properties scroll-timeline-name and scroll-timeline-axis and the shorthand property scroll-timeline. |
| css.properties.scroll-timeline-axis.block 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.scroll-timeline-axis.inline 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.scroll-timeline-axis.x 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.scroll-timeline-axis.y 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.scroll-timeline-name 📋 | Chrome | 7/18/2023 | 1148 | Firefox: The syntax of the shorthand property uses the fixed order of name and then the axis.Firefox: The @scroll-timeline at-rule is replaced with the longhand properties scroll-timeline-name and scroll-timeline-axis and the shorthand property scroll-timeline. |
| css.properties.scrollbar-color 📋 | Chrome | 1/23/2024 | 959 | |
| css.properties.scrollbar-color.auto 📋 | Chrome | 1/23/2024 | 959 | |
| css.properties.shape-image-threshold.percentages | Chrome | 10/22/2019 | 2513 | |
| css.properties.speak 📋 | Chrome | 2/4/2020 | 2408 | Chrome: The implementation is not compliant with the specification, see bug 40813740.Chrome Android: The implementation is not compliant with the specification, see bug 40813740.Edge: The implementation is not compliant with the specification, see bug 40813740.Quest Browser: The implementation is not compliant with the specification, see bug 40813740.Opera: The implementation is not compliant with the specification, see bug 40813740.Opera Android: The implementation is not compliant with the specification, see bug 40813740.Samsung Internet: The implementation is not compliant with the specification, see bug 40813740.WebView Android: The implementation is not compliant with the specification, see bug 40813740. |
| css.properties.speak-as 📋 | Safari | 4/12/2018 | 3071 | |
| css.properties.speak-as.digits 📋 | Safari | 4/12/2018 | 3071 | |
| css.properties.speak-as.literal-punctuation 📋 | Safari | 4/12/2018 | 3071 | |
| css.properties.speak-as.no-punctuation 📋 | Safari | 4/12/2018 | 3071 | |
| css.properties.speak-as.normal 📋 | Safari | 4/12/2018 | 3071 | |
| css.properties.speak-as.spell-out 📋 | Safari | 4/12/2018 | 3071 | |
| css.properties.stroke-color 📋 | Safari | 3/24/2020 | 2359 | |
| css.properties.text-decoration.includes_thickness | Chrome | 11/17/2020 | 2121 | |
| css.properties.text-decoration-line.grammar-error 📋 | Chrome | 1/23/2024 | 959 | |
| css.properties.text-decoration-line.spelling-error 📋 | Chrome | 1/23/2024 | 959 | |
| css.properties.text-decoration-skip 📋 | Safari | 3/25/2019 | 2724 | Chrome: Only supports the deprecated ink value.Chrome Android: Only supports the deprecated ink value.Opera: Only supports the deprecated ink value.Opera Android: Only supports the deprecated ink value.Safari: Supports only none, auto, and objects values.Safari: Supports only none, auto, and objects values.Safari on iOS: Supports only none, auto, and objects values.Safari on iOS: Supports only none, auto, and objects values.Samsung Internet: Only supports the deprecated ink value.WebView Android: Only supports the deprecated ink value.WebView on iOS: Supports only none, auto, and objects values.WebView on iOS: Supports only none, auto, and objects values. |
| css.properties.text-decoration-skip.auto 📋 | Safari | 3/24/2020 | 2359 | |
| css.properties.text-decoration-skip.none 📋 | Safari | 3/24/2020 | 2359 | |
| css.properties.text-decoration-skip-ink.all 📋 | Safari | 3/14/2022 | 1639 | |
| css.properties.text-indent.each-line 📋 | Safari | 9/20/2021 | 1814 | |
| css.properties.text-indent.hanging 📋 | Safari | 9/20/2021 | 1814 | |
| css.properties.text-justify 📋 | Chrome | 1/14/2014 | 4620 | Chrome: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy.Chrome Android: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy.Edge: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy.Edge: Standard values inter-character and none are supported. The deprecated distribute value is also supported.Internet Explorer: Standard values inter-character and none are supported. The deprecated distribute value is also supported.Quest Browser: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy.Opera: inter-word and distribute (deprecated) values are supported, but distribute behavior is buggy. |
| css.properties.text-size-adjust 📋 | Chrome | 10/12/2016 | 3618 | |
| css.properties.text-size-adjust.auto 📋 | Chrome | 10/12/2016 | 3618 | |
| css.properties.text-size-adjust.none 📋 | Chrome | 10/12/2016 | 3618 | |
| css.properties.text-size-adjust.percentages 📋 | Chrome | 10/12/2016 | 3618 | |
| css.properties.text-spacing-trim 📋 | Chrome | 3/19/2024 | 903 | |
| css.properties.text-spacing-trim.normal 📋 | Chrome | 3/19/2024 | 903 | |
| css.properties.text-spacing-trim.space-all 📋 | Chrome | 3/19/2024 | 903 | |
| css.properties.text-spacing-trim.space-first 📋 | Chrome | 3/19/2024 | 903 | |
| css.properties.text-spacing-trim.trim-start 📋 | Chrome | 3/19/2024 | 903 | |
| css.properties.text-transform.full-size-kana 📋 | Safari | 9/18/2023 | 1086 | |
| css.properties.text-transform.full-width 📋 | Safari | 9/18/2023 | 1086 | |
| css.properties.text-transform.greek_accented_characters | Chrome | 4/8/2014 | 4536 | |
| css.properties.text-transform.math-auto 📋 | Chrome | 1/10/2023 | 1337 | |
| css.properties.text-wrap.pretty 📋 | Chrome | 9/12/2023 | 1092 | |
| css.properties.text-wrap-style.pretty 📋 | Chrome | 10/15/2024 | 693 | |
| css.properties.timeline-scope 📋 | Chrome | 8/15/2023 | 1120 | |
| css.properties.timeline-scope.all 📋 | Chrome | 8/15/2023 | 1120 | |
| css.properties.timeline-scope.none 📋 | Chrome | 8/15/2023 | 1120 | |
| css.properties.top.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.top.anchor-size 📋 | Chrome | 1/14/2025 | 602 | |
| css.properties.touch-action.pan-down | Chrome | 12/1/2016 | 3568 | |
| css.properties.touch-action.pan-left | Chrome | 12/1/2016 | 3568 | |
| css.properties.touch-action.pan-right | Chrome | 12/1/2016 | 3568 | |
| css.properties.touch-action.pan-up | Chrome | 12/1/2016 | 3568 | |
| css.properties.view-timeline 📋 | Chrome | 7/18/2023 | 1148 | Firefox: Now supports the x and y values, and also the deprecated horizontal and vertical values. |
| css.properties.view-timeline-axis 📋 | Chrome | 7/18/2023 | 1148 | Firefox: Now supports the x and y values, and also the deprecated horizontal and vertical values. |
| css.properties.view-timeline-axis.block 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.view-timeline-axis.inline 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.view-timeline-axis.x 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.view-timeline-axis.y 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.view-timeline-inset 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.view-timeline-inset.auto 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.view-timeline-name 📋 | Chrome | 7/18/2023 | 1148 | |
| css.properties.white-space.shorthand_values | Chrome | 5/30/2023 | 1197 | Chrome: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Chrome Android: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Edge: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Opera: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Opera Android: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Samsung Internet: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.WebView Android: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim. |
| css.properties.width.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.properties.word-break.auto-phrase 📋 | Chrome | 10/31/2023 | 1043 | Chrome: This value is only applicable if lang="ja" is specified. This value has no effect on other locales.Chrome Android: This value is only applicable if lang="ja" is specified. This value has no effect on other locales.Edge: This value is only applicable if lang="ja" is specified. This value has no effect on other locales.Opera: This value is only applicable if lang="ja" is specified. This value has no effect on other locales.Opera Android: This value is only applicable if lang="ja" is specified. This value has no effect on other locales.Samsung Internet: This value is only applicable if lang="ja" is specified. This value has no effect on other locales.WebView Android: This value is only applicable if lang="ja" is specified. This value has no effect on other locales. |
| css.properties.word-spacing.percentages | Safari | 10/22/2013 | 4704 | |
| css.properties.writing-mode.sideways-lr | Chrome | 1/14/2025 | 602 | |
| css.properties.writing-mode.sideways-rl | Chrome | 1/14/2025 | 602 | |
| css.properties.zoom.reset | Safari | 3/18/2008 | 6748 | |
| css.selectors.-webkit-slider-runnable-track | Chrome | 5/19/2020 | 2303 | |
| css.selectors.-webkit-slider-thumb | Chrome | 5/19/2020 | 2303 | |
| css.selectors.active-view-transition-type 📋 | Chrome | 5/14/2024 | 847 | |
| css.selectors.buffering 📋 | Safari | 3/14/2022 | 1639 | |
| css.selectors.details-content 📋 | Chrome | 11/12/2024 | 665 | |
| css.selectors.first-child.no_parent_required | Chrome | 3/9/2017 | 3470 | |
| css.selectors.host-context 📋 | Chrome | 10/12/2016 | 3618 | |
| css.selectors.lang.argument_list | Safari | 9/30/2015 | 3996 | |
| css.selectors.lang.wildcards | Safari | 9/30/2015 | 3996 | |
| css.selectors.last-child.no_parent_required | Chrome | 3/9/2017 | 3470 | |
| css.selectors.marker.animation_and_transition_support | Chrome | 10/20/2020 | 2149 | |
| css.selectors.muted 📋 | Safari | 3/14/2022 | 1639 | |
| css.selectors.nth-child.no_parent_required | Chrome | 3/9/2017 | 3470 | |
| css.selectors.nth-last-child.no_parent_required | Chrome | 3/9/2017 | 3470 | |
| css.selectors.only-child.no_parent_required | Chrome | 3/9/2017 | 3470 | |
| css.selectors.open 📋 | Chrome | 2/4/2025 | 581 | Chrome: The selector is recognized, but has no effect.Chrome Android: The selector is recognized, but has no effect.Edge: The selector is recognized, but has no effect.Opera: The selector is recognized, but has no effect.Opera Android: The selector is recognized, but has no effect.Samsung Internet: The selector is recognized, but has no effect.WebView Android: The selector is recognized, but has no effect. |
| css.selectors.paused 📋 | Safari | 3/14/2022 | 1639 | |
| css.selectors.playing 📋 | Safari | 3/14/2022 | 1639 | |
| css.selectors.seeking 📋 | Safari | 3/14/2022 | 1639 | |
| css.selectors.selection.text-decoration | Chrome | 9/2/2022 | 1467 | |
| css.selectors.stalled 📋 | Safari | 3/14/2022 | 1639 | |
| css.selectors.volume-locked 📋 | Safari | 3/14/2022 | 1639 | |
| css.selectors.xr-overlay 📋 | Chrome | 5/19/2020 | 2303 | |
| css.types.abs 📋 | Safari | 3/14/2022 | 1639 | |
| css.types.anchor 📋 | Chrome | 5/14/2024 | 847 | |
| css.types.anchor-size 📋 | Chrome | 5/14/2024 | 847 | |
| css.types.anchor-size.inset_margin | Chrome | 1/14/2025 | 602 | |
| css.types.attr.fallback | Chrome | 2/4/2025 | 581 | |
| css.types.attr.type-or-unit | Chrome | 2/4/2025 | 581 | |
| css.types.basic-shape.path.d 📋 | Chrome | 7/20/2016 | 3702 | |
| css.types.calc-size 📋 | Chrome | 9/17/2024 | 721 | |
| css.types.image.paint 📋 | Chrome | 3/6/2018 | 3108 | |
| css.types.sign 📋 | Safari | 3/14/2022 | 1639 |
| API | First Browser | Date | Days in Limbo | Notes |
|---|---|---|---|---|
| html.elements.a.attributionsourceid 📋 | Safari | 4/26/2021 | 1961 | |
| html.elements.a.attributionsrc 📋 | Chrome | 5/14/2024 | 847 | |
| html.elements.a.hreftranslate | Chrome | 4/7/2020 | 2345 | |
| html.elements.a.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3758 | |
| html.elements.a.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3758 | |
| html.elements.a.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3758 | |
| html.elements.a.target.unfencedTop | Chrome | 7/18/2023 | 1148 | |
| html.elements.area.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3758 | |
| html.elements.area.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3758 | |
| html.elements.area.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3758 | |
| html.elements.audio.controlslist 📋 | Chrome | 4/19/2017 | 3429 | |
| html.elements.fencedframe 📋 | Chrome | 7/18/2023 | 1148 | |
| html.elements.fencedframe.allow 📋 | Chrome | 7/18/2023 | 1148 | |
| html.elements.fencedframe.height 📋 | Chrome | 7/18/2023 | 1148 | |
| html.elements.fencedframe.width 📋 | Chrome | 7/18/2023 | 1148 | |
| html.elements.form.autocomplete.webauthn 📋 | Chrome | 11/29/2022 | 1379 | |
| html.elements.iframe.allow.accelerometer 📋 | Chrome | 4/17/2018 | 3066 | |
| html.elements.iframe.allow.ambient-light-sensor 📋 | Chrome | 4/17/2018 | 3066 | |
| html.elements.iframe.allow.attribution-reporting 📋 | Chrome | 9/12/2023 | 1092 | |
| html.elements.iframe.allow.autoplay 📋 | Chrome | 1/23/2018 | 3150 | |
| html.elements.iframe.allow.bluetooth 📋 | Chrome | 8/2/2022 | 1498 | |
| html.elements.iframe.allow.browsing-topics | Chrome | 7/18/2023 | 1148 | |
| html.elements.iframe.allow.compute-pressure 📋 | Chrome | 5/14/2024 | 847 | |
| html.elements.iframe.allow.cross-origin-isolated 📋 | Chrome | 11/17/2020 | 2121 | |
| html.elements.iframe.allow.document-domain 📋 | Chrome | 1/23/2018 | 3150 | |
| html.elements.iframe.allow.encrypted-media 📋 | Chrome | 1/23/2018 | 3150 | |
| html.elements.iframe.allow.fullscreen 📋 | Chrome | 10/17/2017 | 3248 | |
| html.elements.iframe.allow.geolocation 📋 | Chrome | 1/23/2018 | 3150 | |
| html.elements.iframe.allow.gyroscope 📋 | Chrome | 4/17/2018 | 3066 | |
| html.elements.iframe.allow.hid 📋 | Chrome | 3/2/2021 | 2016 | |
| html.elements.iframe.allow.identity-credentials-get 📋 | Chrome | 2/7/2023 | 1309 | |
| html.elements.iframe.allow.idle-detection 📋 | Chrome | 9/21/2021 | 1813 | |
| html.elements.iframe.allow.local-fonts 📋 | Chrome | 6/21/2022 | 1540 | |
| html.elements.iframe.allow.magnetometer 📋 | Chrome | 4/17/2018 | 3066 | |
| html.elements.iframe.allow.midi 📋 | Chrome | 1/23/2018 | 3150 | |
| html.elements.iframe.allow.otp-credentials 📋 | Chrome | 8/31/2021 | 1834 | |
| html.elements.iframe.allow.payment 📋 | Chrome | 7/25/2017 | 3332 | |
| html.elements.iframe.allow.picture-in-picture 📋 | Chrome | 12/4/2018 | 2835 | |
| html.elements.iframe.allow.publickey-credentials-get 📋 | Chrome | 7/27/2020 | 2234 | |
| html.elements.iframe.allow.serial 📋 | Chrome | 3/2/2021 | 2016 | |
| html.elements.iframe.allow.storage-access 📋 | Chrome | 5/2/2023 | 1225 | |
| html.elements.iframe.allow.usb 📋 | Chrome | 7/25/2017 | 3332 | |
| html.elements.iframe.allow.web-share 📋 | Chrome | 10/20/2020 | 2149 | Firefox: Firefox recognizes the web-share permissions policy, but this has no effect in versions of Firefox that do not support the share() method.Firefox for Android: Firefox for Android recognizes the web-share permissions policy, but this has no effect in versions of Firefox for Android that do not support the share() method. |
| html.elements.iframe.allow.wildcards | Chrome | 11/29/2022 | 1379 | |
| html.elements.iframe.allow.window-management 📋 | Chrome | 3/29/2022 | 1624 | |
| html.elements.iframe.allow.xr-spatial-tracking 📋 | Chrome | 12/10/2019 | 2464 | |
| html.elements.iframe.allowpaymentrequest | Chrome | 7/25/2017 | 3332 | |
| html.elements.iframe.browsingtopics | Chrome | 7/18/2023 | 1148 | |
| html.elements.iframe.credentialless 📋 | Chrome | 2/7/2023 | 1309 | |
| html.elements.iframe.csp 📋 | Chrome | 9/5/2017 | 3290 | |
| html.elements.iframe.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3758 | |
| html.elements.iframe.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3758 | |
| html.elements.iframe.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3758 | |
| html.elements.iframe.sandbox.allow-orientation-lock 📋 | Chrome | 7/24/2018 | 2968 | |
| html.elements.iframe.sandbox.allow-presentation 📋 | Chrome | 8/31/2016 | 3660 | |
| html.elements.iframe.sandbox.allow-top-navigation-to-custom-protocols 📋 | Safari | 9/12/2022 | 1457 | |
| html.elements.img.attributionsrc 📋 | Chrome | 5/14/2024 | 847 | |
| html.elements.img.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3758 | |
| html.elements.img.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3758 | |
| html.elements.img.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3758 | |
| html.elements.img.sizes.auto 📋 | Chrome | 6/11/2024 | 819 | |
| html.elements.input.type_month 📋 | Chrome | 6/26/2012 | 5187 | Safari: The input type is recognized, but there is no month-specific control. See bug 200416. |
| html.elements.input.type_week 📋 | Chrome | 6/26/2012 | 5187 | |
| html.elements.link.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3758 | |
| html.elements.link.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3758 | |
| html.elements.link.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3758 | |
| html.elements.link.rel.expect 📋 | Chrome | 4/16/2024 | 875 | |
| html.elements.link.rel.prerender | Chrome | 8/2/2011 | 5516 | |
| html.elements.meta.name.application-title | Chrome | 3/4/2025 | 553 | |
| html.elements.script.attributionsrc 📋 | Chrome | 5/14/2024 | 847 | |
| html.elements.script.referrerpolicy.no-referrer-when-downgrade | Chrome | 10/16/2018 | 2884 | |
| html.elements.script.referrerpolicy.origin-when-cross-origin | Chrome | 10/16/2018 | 2884 | |
| html.elements.script.referrerpolicy.unsafe-url | Chrome | 10/16/2018 | 2884 | |
| html.elements.script.type.importmap.multiple_import_maps 📋 | Chrome | 2/4/2025 | 581 | |
| html.elements.script.type.speculationrules 📋 | Chrome | 1/10/2023 | 1337 | Chrome: Initial support included same-origin prerendering only.Chrome Android: Initial support included same-origin prerendering only.Edge: Initial support included same-origin prerendering only.Quest Browser: Initial support included same-origin prerendering only.Opera: Initial support included same-origin prerendering only.Opera Android: Initial support included same-origin prerendering only.Samsung Internet: Initial support included same-origin prerendering only. |
| html.elements.script.type.speculationrules.eagerness | Chrome | 1/23/2024 | 959 | |
| html.elements.script.type.speculationrules.expects_no_vary_search | Chrome | 7/23/2024 | 777 | Chrome: Supported for prefetch only.Chrome Android: Supported for prefetch only.Edge: Supported for prefetch only.Opera: Supported for prefetch only.Opera Android: Supported for prefetch only.Samsung Internet: Supported for prefetch only. |
| html.elements.script.type.speculationrules.prefetch | Chrome | 2/7/2023 | 1309 | |
| html.elements.script.type.speculationrules.prerender | Chrome | 9/2/2022 | 1467 | |
| html.elements.script.type.speculationrules.referrer_policy | Chrome | 3/7/2023 | 1281 | |
| html.elements.script.type.speculationrules.relative_to | Chrome | 1/23/2024 | 959 | |
| html.elements.script.type.speculationrules.requires | Chrome | 2/7/2023 | 1309 | |
| html.elements.script.type.speculationrules.requires.anonymous-client-ip-when-cross-origin | Chrome | 2/7/2023 | 1309 | |
| html.elements.script.type.speculationrules.source_optional | Chrome | 2/20/2024 | 931 | |
| html.elements.script.type.speculationrules.urls | Chrome | 1/10/2023 | 1337 | |
| html.elements.script.type.speculationrules.where | Chrome | 1/23/2024 | 959 | |
| html.elements.summary.display_list_item | Chrome | 3/2/2021 | 2016 | |
| html.elements.td.rowspan.rowspan_zero | Chrome | 3/6/2018 | 3108 | |
| html.elements.template.shadowrootclonable 📋 | Chrome | 4/16/2024 | 875 | |
| html.elements.template.shadowrootdelegatesfocus 📋 | Chrome | 3/19/2024 | 903 | |
| html.elements.template.shadowrootserializable 📋 | Chrome | 5/14/2024 | 847 | |
| html.elements.textarea.autocomplete.webauthn 📋 | Chrome | 11/29/2022 | 1379 | |
| html.elements.textarea.wrap.hard | Chrome | 12/13/2011 | 5383 | |
| html.elements.video.controlslist 📋 | Chrome | 4/19/2017 | 3429 | |
| html.global_attributes.autocapitalize 📋 | Chrome | 5/19/2015 | 4130 | |
| html.global_attributes.autocorrect 📋 | Safari | 4/26/2021 | 1961 | Safari: Takes values of true/false (instead of on/off).Safari: Allowed on <input type='password'> elements.Safari on iOS: Takes values of true/false (instead of on/off).Safari on iOS: Allowed on <input type='password'> elements. |
| html.global_attributes.hidden.until-found 📋 | Chrome | 5/24/2022 | 1568 | |
| html.global_attributes.is 📋 | Chrome | 5/29/2018 | 3024 | |
| html.global_attributes.virtualkeyboardpolicy 📋 | Chrome | 9/21/2021 | 1813 | |
| html.manifest.background_color 📋 | Chrome | 10/13/2015 | 3983 | |
| html.manifest.description 📋 | Chrome | 1/19/2021 | 2058 | Firefox for Android: The property parses, but has no effect. |
| html.manifest.display.fullscreen 📋 | Chrome | 11/18/2014 | 4312 | |
| html.manifest.display.minimal-ui 📋 | Chrome | 11/18/2014 | 4312 | |
| html.manifest.display_override 📋 | Chrome | 3/2/2021 | 2016 | Chrome: display_override and/or display are required for a web app to be installable.Chrome Android: display_override and/or display are required for a web app to be installable.Edge: display_override and/or display are required for a web app to be installable.Quest Browser: display_override and/or display are required for a web app to be installable.Opera: display_override and/or display are required for a web app to be installable.Opera Android: display_override and/or display are required for a web app to be installable.Samsung Internet: display_override and/or display are required for a web app to be installable. |
| html.manifest.display_override.tabbed 📋 | Chrome | 6/11/2024 | 819 | |
| html.manifest.display_override.window-controls-overlay 📋 | Chrome | 9/2/2022 | 1467 | |
| html.manifest.file_handlers 📋 | Chrome | 5/24/2022 | 1568 | |
| html.manifest.launch_handler 📋 | Chrome | 2/7/2023 | 1309 | |
| html.manifest.launch_handler.client_mode 📋 | Chrome | 2/7/2023 | 1309 | |
| html.manifest.note_taking 📋 | Chrome | 10/19/2021 | 1785 | |
| html.manifest.note_taking.new_note_url 📋 | Chrome | 10/19/2021 | 1785 | |
| html.manifest.orientation 📋 | Chrome | 11/18/2014 | 4312 | |
| html.manifest.protocol_handlers 📋 | Chrome | 11/15/2021 | 1758 | |
| html.manifest.protocol_handlers.protocol 📋 | Chrome | 11/15/2021 | 1758 | |
| html.manifest.protocol_handlers.url 📋 | Chrome | 11/15/2021 | 1758 | |
| html.manifest.serviceworker | Chrome | 10/16/2018 | 2884 | |
| html.manifest.serviceworker.scope | Chrome | 10/16/2018 | 2884 | |
| html.manifest.serviceworker.src | Chrome | 10/16/2018 | 2884 | |
| html.manifest.serviceworker.use_cache | Chrome | 10/16/2018 | 2884 | |
| html.manifest.share_target 📋 | Chrome | 3/2/2021 | 2016 | Firefox for Android: The property parses, but has no effect. |