Style containment
Newly available since 2022-07-26
The contain: style CSS declaration permits the browser to avoid slower layout calculations by preventing modification to counter (counter-increment and counter-set) and quotation styles (content property quote values) beyond the element's descendants.
Learning resources on MDN
Browser support
- Chrome 52 Released on 2016-07-20
- Chrome Android 52 Released on 2016-07-27
- Edge 79 Released on 2020-01-15
- Firefox 103 Released on 2022-07-26
- Firefox for Android 103 Released on 2022-07-26
- Safari 15.4 Released on 2022-03-14
- Safari on iOS 15.4 Released on 2022-03-14