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 22 of 64 missing entries

EntryStatusSupportBrowsers
@function at-rule📗 Standard🧪 Experimental
Browsers
chrome: 139
chrome_android: 139
edge: 139
opera: 123
opera_android: 91
webview_android: 139
anchor-scope property📗 Standard🏆 Stable
Browsers
chrome: 131
chrome_android: 131
edge: 131
opera: 116
opera_android: 87
safari: 26
safari_ios: 26
webview_android: 131
webview_ios: 26
background-repeat-x property📗 Standard🧪 Experimental
Browsers
safari: 5
safari_ios: 4.2
webview_ios: 4.2
background-repeat-y property📗 Standard🧪 Experimental
Browsers
safari: 5
safari_ios: 4.2
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
baseline-source property📗 Standard🏆 Stable
Browsers
chrome: 111
chrome_android: 111
edge: 111
firefox: 115
firefox_android: 115
opera: 97
opera_android: 75
samsunginternet_android: 22.0
webview_android: 111
dynamic-range-limit property📗 Standard🏆 Stable
Browsers
chrome: 136
chrome_android: 136
edge: 136
opera: 121
opera_android: 90
safari: 26
safari_ios: 26
webview_android: 136
webview_ios: 26
font-width property📗 Standard🧪 Experimental
Browsers
safari: 18.4
interactivity property📗 Standard🧪 Experimental
Browsers
chrome: 135
edge: 135
opera: 120
object-view-box property📗 Standard🧪 Experimental
Browsers
chrome: 104
chrome_android: 104
edge: 104
oculus: 23.0
opera: 90
opera_android: 71
samsunginternet_android: 20.0
webview_android: 104
scroll-initial-target property📗 Standard🧪 Experimental
Browsers
chrome: 133
chrome_android: 133
edge: 133
opera: 118
opera_android: 88
webview_android: 133
scroll-target-group property📗 Standard🧪 Experimental
Browsers
chrome: 140
chrome_android: 140
opera: 124
webview_android: 140
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
opera: 124
webview_android: 140
active-view-transition-type selector📗 Standard🏆 Stable
Browsers
chrome: 125
chrome_android: 125
edge: 125
opera: 111
opera_android: 83
safari: 18.2
safari_ios: 18.2
samsunginternet_android: 27.0
webview_android: 125
webview_ios: 18.2
headingfunction selector📗 Standard🧪 Experimental
Browsers
firefox: preview
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
dashed-function data type📗 Standard🧪 Experimental
Browsers
chrome: 139
chrome_android: 139
edge: 139
opera: 123
opera_android: 91
webview_android: 139
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
progress data type📗 Standard🧪 Experimental
Browsers
chrome: 138
chrome_android: 138
edge: 138
opera: 122
opera_android: 91
webview_android: 138
type data type📗 Standard🧪 Experimental
Browsers
chrome: 139
chrome_android: 139
edge: 139
opera: 123
opera_android: 91
webview_android: 139
Updated Sep 16, 2025, 4:45 PM, BCD v 7.1.6. Built by @bsmth.