For a given set of browsers what APIs are still considred experimental, and how long have they been experimental?
Below is a list of features that are marked as "Experimental" in Firefox and Chrome Android
| API | First Browser | Date | Last Browser | Date | Days in experimentation | Notes |
|---|---|---|---|---|---|---|
| css.at-rules.keyframes.named_range_keyframes 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.at-rules.media.prefers-reduced-data 📋 | Chrome Android | 8/25/2020 | 2240 | |||
| css.at-rules.media.prefers-reduced-transparency 📋 | Firefox | 5/9/2023 | Chrome Android | 10/10/2023 | 154 | |
| css.at-rules.page.bottom-center 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.bottom-left 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.bottom-left-corner 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.bottom-right 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.bottom-right-corner 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.left-bottom 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.left-middle 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.left-top 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.right-bottom 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.right-middle 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.right-top 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.top-center 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.top-left 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.top-left-corner 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.top-right 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.page.top-right-corner 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.at-rules.position-try 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.-webkit-app-region | Chrome Android | 2/27/2013 | 4976 | |||
| css.properties.align-items.anchor-center 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.align-self.anchor-center 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.anchor-name 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.anchor-name.none 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.anchor-scope 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.properties.anchor-scope.all 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.properties.anchor-scope.none 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.properties.animation-duration.auto 📋 | Chrome Android | 7/21/2023 | 1180 | 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 Android | 7/21/2023 | 1180 | |||
| css.properties.animation-range-end 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.animation-range-end.normal 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.animation-range-start 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.animation-range-start.normal 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.animation-timeline 📋 | Firefox | 2/14/2023 | Chrome Android | 7/21/2023 | 157 | |
| css.properties.animation-timeline.scroll 📋 | Firefox | 2/14/2023 | Chrome Android | 7/21/2023 | 157 | 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 📋 | Firefox | 6/6/2023 | Chrome Android | 7/21/2023 | 45 | |
| css.properties.background-image.element 📋 | Firefox | 3/22/2011 | 5684 | |||
| css.properties.block-size.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.block-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |||
| css.properties.bottom.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.bottom.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.break-after.always | Firefox | 1/7/2020 | 2471 | |||
| css.properties.break-before.always | Firefox | 1/7/2020 | 2471 | |||
| css.properties.container-type.scroll-state 📋 | Chrome Android | 2/4/2025 | 616 | |||
| css.properties.content.none_applies_to_elements | Firefox | 8/10/2021 | 1890 | |||
| css.properties.counter-reset.reset_does_not_affect_siblings | Firefox | 10/20/2020 | 2184 | |||
| css.properties.counter-reset.reversed 📋 | Firefox | 1/11/2022 | 1736 | |||
| css.properties.display.math | Chrome Android | 1/10/2023 | 1372 | |||
| css.properties.field-sizing 📋 | Chrome Android | 3/19/2024 | 938 | |||
| css.properties.field-sizing.content 📋 | Chrome Android | 3/19/2024 | 938 | |||
| css.properties.field-sizing.fixed 📋 | Chrome Android | 3/19/2024 | 938 | |||
| css.properties.font-family.math | Chrome Android | 1/10/2023 | 1372 | |||
| css.properties.font-palette.animation_computed | Chrome Android | 1/23/2024 | 994 | |||
| css.properties.font-palette.palette-mix_function 📋 | Chrome Android | 1/23/2024 | 994 | |||
| css.properties.font-synthesis-position 📋 | Firefox | 9/26/2023 | 1113 | |||
| css.properties.font-synthesis-position.auto 📋 | Firefox | 9/26/2023 | 1113 | |||
| css.properties.font-synthesis-position.none 📋 | Firefox | 9/26/2023 | 1113 | |||
| css.properties.forced-color-adjust.preserve-parent-color 📋 | Chrome Android | 9/27/2022 | 1477 | |||
| css.properties.grid-template-columns.masonry 📋 | Firefox | 6/2/2020 | 2324 | |||
| css.properties.grid-template-rows.masonry 📋 | Firefox | 6/2/2020 | 2324 | |||
| css.properties.height.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.height.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |||
| css.properties.hyphenate-limit-chars.auto 📋 | Chrome Android | 1/10/2023 | 1372 | |||
| css.properties.image-rendering.smooth 📋 | Firefox | 10/5/2021 | 1834 | |||
| css.properties.inline-size.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.inline-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |||
| css.properties.inset.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.inset.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.inset-block.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.inset-block.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.inset-block-end.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.inset-block-end.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.inset-block-start.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.inset-block-start.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.inset-inline.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.inset-inline.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.inset-inline-end.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.inset-inline-end.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.inset-inline-start.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.inset-inline-start.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.interpolate-size 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.interpolate-size.allow-keywords 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.interpolate-size.numeric-only 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.justify-items.anchor-center 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.justify-self.anchor-center 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.left.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.left.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.line-height-step 📋 | Chrome Android | 8/1/2017 | 3360 | |||
| css.properties.margin.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-block.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-block-end.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-block-start.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-bottom.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-inline.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-inline-end.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-inline-start.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-left.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-right.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.margin-top.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.math-shift 📋 | Chrome Android | 1/10/2023 | 1372 | |||
| css.properties.max-block-size.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.max-block-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |||
| css.properties.max-height.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.max-height.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |||
| css.properties.max-height.stretch 📋 | Chrome Android | 7/10/2013 | 4843 | |||
| css.properties.max-inline-size.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.max-inline-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |||
| css.properties.max-width.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.max-width.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |||
| css.properties.max-width.stretch 📋 | Chrome Android | 2/27/2013 | 4976 | |||
| css.properties.min-block-size.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.min-block-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |||
| css.properties.min-height.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.min-height.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |||
| css.properties.min-height.stretch | Chrome Android | 7/10/2013 | 4843 | |||
| css.properties.min-inline-size.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.min-inline-size.fit-content_function | Firefox | 8/10/2021 | 1890 | |||
| css.properties.min-width.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.min-width.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |||
| css.properties.min-width.stretch | Chrome Android | 2/27/2013 | 4976 | |||
| css.properties.object-view-box 📋 | Chrome Android | 8/2/2022 | 1533 | |||
| css.properties.object-view-box.none 📋 | Chrome Android | 8/2/2022 | 1533 | |||
| css.properties.overflow-block.overlay | Firefox | 4/11/2023 | 1281 | |||
| css.properties.overflow-clip-margin.border-box 📋 | Chrome Android | 8/2/2022 | 1533 | |||
| css.properties.overflow-clip-margin.content-box 📋 | Chrome Android | 8/2/2022 | 1533 | |||
| css.properties.overflow-clip-margin.padding-box 📋 | Chrome Android | 8/2/2022 | 1533 | |||
| css.properties.overflow-inline.overlay | Firefox | 4/11/2023 | 1281 | |||
| css.properties.overlay 📋 | Chrome Android | 9/12/2023 | 1127 | |||
| css.properties.overlay.auto 📋 | Chrome Android | 9/12/2023 | 1127 | |||
| css.properties.overlay.none 📋 | Chrome Android | 9/12/2023 | 1127 | |||
| css.properties.place-items.anchor-center 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.place-self.anchor-center 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-anchor.auto 📋 | Chrome Android | 5/14/2024 | 882 | 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 Android | 9/17/2024 | 756 | |||
| css.properties.position-area.block-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.block-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.bottom 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.center 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.inline-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.inline-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.left 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.none 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.right 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.self-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.self-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-all 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-block-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-block-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-bottom 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-inline-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-inline-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-top 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-x-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-x-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-y-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.span-y-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.top 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.x-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.x-self-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.x-self-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.x-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.y-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.y-self-end 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.y-self-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-area.y-start 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.properties.position-try 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-try-fallbacks 📋 | Chrome Android | 8/20/2024 | 784 | |||
| css.properties.position-try-fallbacks.flip-block 📋 | Chrome Android | 8/20/2024 | 784 | |||
| css.properties.position-try-fallbacks.flip-inline 📋 | Chrome Android | 8/20/2024 | 784 | |||
| css.properties.position-try-fallbacks.flip-start 📋 | Chrome Android | 8/20/2024 | 784 | |||
| css.properties.position-try-fallbacks.none 📋 | Chrome Android | 8/20/2024 | 784 | |||
| css.properties.position-try-fallbacks.position-area 📋 | Chrome Android | 8/20/2024 | 784 | 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 Android | 5/14/2024 | 882 | |||
| css.properties.position-try-order.most-block-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-try-order.most-height 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-try-order.most-inline-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-try-order.most-width 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-try-order.normal 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-visibility 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-visibility.always 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-visibility.anchors-visible 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.position-visibility.no-overflow 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.reading-flow 📋 | Chrome Android | 8/20/2024 | 784 | |||
| css.properties.right.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.right.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.ruby-position.alternate | Firefox | 4/19/2021 | 2003 | |||
| css.properties.scroll-initial-target 📋 | Chrome Android | 2/4/2025 | 616 | |||
| css.properties.scroll-initial-target.nearest 📋 | Chrome Android | 2/4/2025 | 616 | |||
| css.properties.scroll-initial-target.none 📋 | Chrome Android | 2/4/2025 | 616 | |||
| css.properties.scroll-timeline 📋 | Firefox | 3/14/2023 | Chrome Android | 7/21/2023 | 129 | 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 📋 | Firefox | 3/14/2023 | Chrome Android | 7/21/2023 | 129 | 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 Android | 7/21/2023 | 1180 | |||
| css.properties.scroll-timeline-axis.inline 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.scroll-timeline-axis.x 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.scroll-timeline-axis.y 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.scroll-timeline-name 📋 | Firefox | 3/14/2023 | Chrome Android | 7/21/2023 | 129 | 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.text-decoration-line.grammar-error 📋 | Chrome Android | 1/23/2024 | 994 | |||
| css.properties.text-decoration-line.spelling-error 📋 | Chrome Android | 1/23/2024 | 994 | |||
| css.properties.text-emphasis-position.auto | Firefox | 10/29/2024 | 714 | |||
| css.properties.text-justify.auto 📋 | Firefox | 8/8/2017 | 3353 | |||
| css.properties.text-justify.inter-character 📋 | Firefox | 8/8/2017 | 3353 | |||
| css.properties.text-justify.inter-word 📋 | Firefox | 8/8/2017 | 3353 | |||
| css.properties.text-justify.none 📋 | Firefox | 8/8/2017 | 3353 | |||
| css.properties.text-size-adjust 📋 | Chrome Android | 10/19/2016 | 3646 | |||
| css.properties.text-size-adjust.auto 📋 | Chrome Android | 10/19/2016 | 3646 | |||
| css.properties.text-size-adjust.none 📋 | Chrome Android | 10/19/2016 | 3646 | |||
| css.properties.text-size-adjust.percentages 📋 | Chrome Android | 10/19/2016 | 3646 | |||
| css.properties.text-spacing-trim 📋 | Chrome Android | 3/19/2024 | 938 | |||
| css.properties.text-spacing-trim.normal 📋 | Chrome Android | 3/19/2024 | 938 | |||
| css.properties.text-spacing-trim.space-all 📋 | Chrome Android | 3/19/2024 | 938 | |||
| css.properties.text-spacing-trim.space-first 📋 | Chrome Android | 3/19/2024 | 938 | |||
| css.properties.text-spacing-trim.trim-start 📋 | Chrome Android | 3/19/2024 | 938 | |||
| css.properties.text-wrap-style.pretty 📋 | Chrome Android | 10/15/2024 | 728 | |||
| css.properties.timeline-scope 📋 | Chrome Android | 8/15/2023 | 1155 | |||
| css.properties.timeline-scope.all 📋 | Chrome Android | 8/15/2023 | 1155 | |||
| css.properties.timeline-scope.none 📋 | Chrome Android | 8/15/2023 | 1155 | |||
| css.properties.top.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.top.anchor-size 📋 | Chrome Android | 1/14/2025 | 637 | |||
| css.properties.view-timeline 📋 | Firefox | 6/6/2023 | Chrome Android | 7/21/2023 | 45 | Firefox: Now supports the x and y values, and also the deprecated horizontal and vertical values. |
| css.properties.view-timeline-axis 📋 | Firefox | 6/6/2023 | Chrome Android | 7/21/2023 | 45 | Firefox: Now supports the x and y values, and also the deprecated horizontal and vertical values. |
| css.properties.view-timeline-axis.block 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.view-timeline-axis.inline 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.view-timeline-axis.x 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.view-timeline-axis.y 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.view-timeline-inset 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.view-timeline-inset.auto 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| css.properties.view-timeline-name 📋 | Firefox | 3/14/2023 | Chrome Android | 7/21/2023 | 129 | |
| css.properties.white-space.shorthand_values | Chrome Android | 5/30/2023 | 1232 | 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.white-space-collapse.preserve-spaces 📋 | Firefox | 3/19/2024 | 938 | |||
| css.properties.width.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.properties.width.fit-content_function 📋 | Firefox | 8/10/2021 | 1890 | |||
| css.properties.word-break.auto-phrase 📋 | Chrome Android | 10/31/2023 | 1078 | 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.selectors.-moz-first-node | Firefox | 1/7/2020 | 2471 | |||
| css.selectors.-moz-focus-inner | Firefox | 1/7/2020 | 2471 | |||
| css.selectors.-moz-last-node | Firefox | 1/7/2020 | 2471 | |||
| css.selectors.-moz-list-bullet | Firefox | 1/7/2020 | 2471 | |||
| css.selectors.-moz-list-number | Firefox | 1/7/2020 | 2471 | |||
| css.selectors.-moz-progress-bar | Firefox | 1/7/2020 | 2471 | |||
| css.selectors.-webkit-slider-runnable-track | Chrome Android | 5/19/2020 | 2338 | |||
| css.selectors.-webkit-slider-thumb | Chrome Android | 5/19/2020 | 2338 | |||
| css.selectors.active-view-transition-type 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.selectors.details-content 📋 | Chrome Android | 11/12/2024 | 700 | |||
| css.selectors.open 📋 | Chrome Android | 2/4/2025 | 616 | 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.xr-overlay 📋 | Chrome Android | 5/19/2020 | 2338 | |||
| css.types.anchor 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.types.anchor-size 📋 | Chrome Android | 5/14/2024 | 882 | |||
| css.types.anchor-size.inset_margin | Chrome Android | 1/14/2025 | 637 | |||
| css.types.attr.type-or-unit | Chrome Android | 2/4/2025 | 616 | |||
| css.types.calc-size 📋 | Chrome Android | 9/17/2024 | 756 | |||
| css.types.color.system-color.mark_marktext_buttonborder 📋 | Firefox | 1/17/2023 | 1365 | |||
| css.types.image.element 📋 | Firefox | 11/14/2017 | 3255 | Firefox: -moz-element() is limited to background-image, background, border-image and border-image-source.Firefox: -moz-element() is limited to background-image and background.Firefox for Android: -moz-element() is limited to background-image, background, border-image and border-image-source.Firefox for Android: -moz-element() is limited to background-image and background. | ||
| css.types.ratio.number_value | Firefox | 6/30/2020 | 2296 |
| API | First Browser | Date | Last Browser | Date | Days in experimentation | Notes |
|---|---|---|---|---|---|---|
| html.elements.a.attributionsrc 📋 | Chrome Android | 5/14/2024 | 882 | |||
| html.elements.a.hreftranslate | Chrome Android | 4/7/2020 | 2380 | |||
| html.elements.a.target.unfencedTop | Chrome Android | 7/21/2023 | 1180 | |||
| html.elements.fencedframe 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| html.elements.fencedframe.allow 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| html.elements.fencedframe.height 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| html.elements.fencedframe.width 📋 | Chrome Android | 7/21/2023 | 1180 | |||
| html.elements.form.autocomplete.webauthn 📋 | Chrome Android | 11/29/2022 | 1414 | |||
| html.elements.iframe.allow.accelerometer 📋 | Chrome Android | 4/17/2018 | 3101 | |||
| html.elements.iframe.allow.ambient-light-sensor 📋 | Chrome Android | 4/17/2018 | 3101 | |||
| html.elements.iframe.allow.attribution-reporting 📋 | Chrome Android | 9/12/2023 | 1127 | |||
| html.elements.iframe.allow.bluetooth 📋 | Chrome Android | 8/2/2022 | 1533 | |||
| html.elements.iframe.allow.browsing-topics | Chrome Android | 7/21/2023 | 1180 | |||
| html.elements.iframe.allow.cross-origin-isolated 📋 | Chrome Android | 11/17/2020 | 2156 | |||
| html.elements.iframe.allow.document-domain 📋 | Firefox | 3/10/2020 | 2408 | |||
| html.elements.iframe.allow.gamepad 📋 | Firefox | 8/10/2021 | 1890 | Firefox: The default allowlist is * instead of self (as required by the specification).Firefox for Android: The default allowlist is * instead of self (as required by the specification). | ||
| html.elements.iframe.allow.gyroscope 📋 | Chrome Android | 4/17/2018 | 3101 | |||
| html.elements.iframe.allow.hid 📋 | Chrome Android | 3/2/2021 | 2051 | |||
| html.elements.iframe.allow.identity-credentials-get 📋 | Chrome Android | 2/7/2023 | 1344 | |||
| html.elements.iframe.allow.idle-detection 📋 | Chrome Android | 9/21/2021 | 1848 | |||
| html.elements.iframe.allow.magnetometer 📋 | Chrome Android | 4/17/2018 | 3101 | |||
| html.elements.iframe.allow.otp-credentials 📋 | Chrome Android | 7/27/2020 | 2269 | |||
| html.elements.iframe.allow.serial 📋 | Chrome Android | 3/2/2021 | 2051 | |||
| html.elements.iframe.allow.speaker-selection 📋 | Firefox | 8/1/2023 | 1169 | Firefox for Android: Not available due to a limitation in Android (see bug 1473346). | ||
| html.elements.iframe.allow.storage-access 📋 | Chrome Android | 5/2/2023 | 1260 | |||
| html.elements.iframe.allow.usb 📋 | Chrome Android | 8/1/2017 | 3360 | |||
| html.elements.iframe.allow.wildcards | Chrome Android | 11/29/2022 | 1414 | |||
| html.elements.iframe.allow.window-management 📋 | Chrome Android | 3/29/2022 | 1659 | |||
| html.elements.iframe.allow.xr-spatial-tracking 📋 | Chrome Android | 12/17/2019 | 2492 | |||
| html.elements.iframe.browsingtopics | Chrome Android | 7/21/2023 | 1180 | |||
| html.elements.iframe.credentialless 📋 | Chrome Android | 2/7/2023 | 1344 | |||
| html.elements.iframe.csp 📋 | Chrome Android | 9/5/2017 | 3325 | |||
| html.elements.img.attributionsrc 📋 | Chrome Android | 5/14/2024 | 882 | |||
| html.elements.link.rel.expect 📋 | Chrome Android | 4/16/2024 | 910 | |||
| html.elements.meta.name.application-title | Chrome Android | 3/4/2025 | 588 | |||
| html.elements.script.attributionsrc 📋 | Chrome Android | 5/14/2024 | 882 | |||
| html.elements.script.type.importmap.multiple_import_maps 📋 | Chrome Android | 2/4/2025 | 616 | |||
| html.elements.script.type.speculationrules 📋 | Chrome Android | 1/10/2023 | 1372 | 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 Android | 1/23/2024 | 994 | |||
| html.elements.script.type.speculationrules.expects_no_vary_search | Chrome Android | 7/23/2024 | 812 | 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 Android | 6/21/2022 | 1575 | |||
| html.elements.script.type.speculationrules.prerender | Chrome Android | 6/21/2022 | 1575 | |||
| html.elements.script.type.speculationrules.referrer_policy | Chrome Android | 3/7/2023 | 1316 | |||
| html.elements.script.type.speculationrules.relative_to | Chrome Android | 1/23/2024 | 994 | |||
| html.elements.script.type.speculationrules.requires | Chrome Android | 6/21/2022 | 1575 | |||
| html.elements.script.type.speculationrules.requires.anonymous-client-ip-when-cross-origin | Chrome Android | 6/21/2022 | 1575 | |||
| html.elements.script.type.speculationrules.source_optional | Chrome Android | 2/20/2024 | 966 | |||
| html.elements.script.type.speculationrules.urls | Chrome Android | 6/21/2022 | 1575 | |||
| html.elements.script.type.speculationrules.where | Chrome Android | 1/23/2024 | 994 | |||
| html.elements.template.shadowrootserializable 📋 | Chrome Android | 5/14/2024 | 882 | |||
| html.elements.textarea.autocomplete.webauthn 📋 | Chrome Android | 11/29/2022 | 1414 | |||
| html.global_attributes.hidden.until-found 📋 | Chrome Android | 5/24/2022 | 1603 | |||
| html.global_attributes.virtualkeyboardpolicy 📋 | Chrome Android | 9/21/2021 | 1848 | |||
| html.manifest.display_override 📋 | Chrome Android | 3/2/2021 | 2051 | 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 Android | 6/11/2024 | 854 | |||
| html.manifest.display_override.window-controls-overlay 📋 | Chrome Android | 9/2/2022 | 1502 | |||
| html.manifest.launch_handler 📋 | Chrome Android | 2/7/2023 | 1344 | |||
| html.manifest.launch_handler.client_mode 📋 | Chrome Android | 2/7/2023 | 1344 | |||
| html.manifest.prefer_related_applications 📋 | Chrome Android | 7/29/2015 | 4094 | Chrome: prefer_related_applications must be false or not present for a web app to be installable.Edge: prefer_related_applications must be false or not present for a web app to be installable.Firefox for Android: The property parses, but has no effect.Opera: prefer_related_applications must be false or not present for a web app to be installable. | ||
| html.manifest.protocol_handlers 📋 | Chrome Android | 11/15/2021 | 1793 | |||
| html.manifest.protocol_handlers.protocol 📋 | Chrome Android | 11/15/2021 | 1793 | |||
| html.manifest.protocol_handlers.url 📋 | Chrome Android | 11/15/2021 | 1793 | |||
| html.manifest.related_applications 📋 | Chrome Android | 7/29/2015 | 4094 | Firefox for Android: The property parses, but has no effect. | ||
| html.manifest.serviceworker | Chrome Android | 10/17/2018 | 2918 | |||
| html.manifest.serviceworker.scope | Chrome Android | 10/17/2018 | 2918 | |||
| html.manifest.serviceworker.src | Chrome Android | 10/17/2018 | 2918 | |||
| html.manifest.serviceworker.use_cache | Chrome Android | 10/17/2018 | 2918 | |||
| html.manifest.share_target 📋 | Chrome Android | 7/30/2019 | 2632 | Firefox for Android: The property parses, but has no effect. |