CSS features in BCD missing an MDN reference

This page lists CSS entries in BCD that are missing an MDN Web Docs reference page.

Information

The default filtering on this page returns CSS features with a high likelihood to have pull requests accepted that add a corresponding docs page. If you want to fill the gaps, check if someone is working on it in the mdn/content GitHub repo. If there are no active pull requests for the feature, get in touch with us or open an issue with an intent to document it.

You can switch Depth 3 to see more data, but it's not that useful. By default, two levels of the tree are exposed, meaning you will see css.property-name but not css.property-name.value. This is more practical as not every value for a CSS property will have a dedicated MDN page, for example.

Here's a quick explanation of the terminology used:

Stable
A major browser supports this for at least 2 years, or it's supported in multiple major browser engines.
Standard
Formally defined in a specification.
Experimental
Only available behind configs / preferences in one browser.
Deprecated
Marked as not for use in modern websites / projects.

Showing 16 of 58 missing entries

EntryStatusSupportBrowsers
anchor-scope property📗 Standard🏆 Stable
Browsers
chrome: 131
chrome_android: 131
edge: 131
firefox: 147
firefox_android: 147
opera: 116
opera_android: 87
safari: 26
safari_ios: 26
samsunginternet_android: 29.0
webview_android: 131
webview_ios: 26
background-repeat-x property📗 Standard🧪 Experimental
Browsers
chrome: 5
chrome_android: 18
edge: 79
oculus: 5.0
opera: 15
opera_android: 14
safari: 5
safari_ios: 4.2
samsunginternet_android: 1.0
webview_android: 4.4
webview_ios: 4.2
background-repeat-y property📗 Standard🧪 Experimental
Browsers
chrome: 5
chrome_android: 18
edge: 79
oculus: 5.0
opera: 15
opera_android: 14
safari: 5
safari_ios: 4.2
samsunginternet_android: 1.0
webview_android: 4.4
webview_ios: 4.2
baseline-shift property📗 Standard🏆 Stable
Browsers
chrome: 1
chrome_android: 18
edge: 79
oculus: 5.0
opera: 15
opera_android: 14
safari: 4
safari_ios: 3.2
samsunginternet_android: 1.0
webview_android: 4.4
webview_ios: 3.2
font-width property📗 Standard🧪 Experimental
Browsers
safari: 18.4
scroll-initial-target property📗 Standard🧪 Experimental
Browsers
chrome: 133
chrome_android: 133
edge: 133
opera: 118
opera_android: 88
samsunginternet_android: 29.0
webview_android: 133
speak property📗 Standard🏆 Stable
Browsers
chrome: ≤80
chrome_android: ≤80
edge: ≤80
oculus: ≤9.0
opera: ≤67
opera_android: ≤57
samsunginternet_android: ≤13.0
webview_android: ≤80
stroke-color property📗 Standard🧪 Experimental
Browsers
safari: 11.1
safari_ios: 11.3
webview_ios: 11.3
view-transition-group property📗 Standard🧪 Experimental
Browsers
chrome: 140
chrome_android: 140
edge: 140
opera: 124
opera_android: 92
webview_android: 140
headingfunction selector📗 Standard🧪 Experimental
Browsers
firefox: preview
search-text selector📗 Standard🧪 Experimental
Browsers
chrome: 144
chrome_android: 144
edge: 144
webview_android: 144
target-after selector📗 Standard🧪 Experimental
Browsers
chrome: 142
chrome_android: 142
edge: 142
opera_android: 93
webview_android: 142
target-before selector📗 Standard🧪 Experimental
Browsers
chrome: 142
chrome_android: 142
edge: 142
opera_android: 93
webview_android: 142
view-transition-group-children selector📗 Standard🧪 Experimental
Browsers
chrome: 140
chrome_android: 140
edge: 140
opera: 124
opera_android: 92
webview_android: 140
xr-overlay selector📗 Standard🧪 Experimental
Browsers
chrome: 83
chrome_android: 83
edge: 83
oculus: 10.0
opera: 69
opera_android: 59
samsunginternet_android: 13.0
global_keywords data type📗 Standard🏆 Stable
Browsers
chrome: 1
chrome_android: 18
edge: 12
firefox: 1
firefox_android: 4
ie: 3
oculus: 5.0
opera: 3.5
opera_android: 10.1
safari: 1
safari_ios: 1
samsunginternet_android: 1.0
webview_android: 4.4
webview_ios: 1
Updated Dec 10, 2025, 12:24 PM, BCD v 7.2.0. Built by @bsmth.