Style containmentThe 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.containmentContainmentwidely2022-07-262025-01-26https://drafts.csswg.org/css-contain-2/#containment-stylehttps://developer.mozilla.org/docs/Web/CSS/Reference/Properties/containcss.properties.contain.stylehttps://nowyoucanuse.com/features--contain-style.html