CSS Containment
- RECThe CSS contain
property lets developers limit the scope of the browser's styles, layout and paint work for faster and more efficient rendering.
Chrome
- 4 - 50: Not supported
- 51: Disabled by default
- 52 - 110: Supported
- 111: Supported
- 112 - 114: Supported
Edge
- 12 - 18: Not supported
- 79 - 110: Supported
- 111: Supported
Safari
- 3.1 - 15.3: Not supported
- 15.4 - 16.2: Supported
- 16.3: Supported
- 16.4 - TP: Supported
Firefox
- 2 - 40: Not supported
- 41 - 68: Disabled by default
- 69 - 110: Supported
- 111: Supported
- 112 - 113: Supported
Opera
- 9 - 37: Not supported
- 38 - 39: Disabled by default
- 40 - 94: Supported
- 95: Supported
IE
- 5.5 - 10: Not supported
- 11: Not supported
Chrome for Android
- 111: Supported
Safari on iOS
- 3.2 - 15.3: Not supported
- 15.4 - 16.2: Supported
- 16.3: Supported
- 16.4: Supported
Samsung Internet
- 4 - 5.4: Not supported
- 6.2 - 19.0: Supported
- 20: Supported
Opera Mini
- all: Not supported
Opera Mobile
- 10 - 12.1: Not supported
- 73: Supported
UC Browser for Android
- 13.4: Supported
Android Browser
- 2.1 - 4.4.4: Not supported
- 111: Supported
Firefox for Android
- 110: Supported
QQ Browser
- 13.1: Supported
Baidu Browser
- 13.18: Supported
KaiOS Browser
- 2.5: Disabled by default
- 3: Supported
- Resources:
- Google Developers article