Size containmentThe contain: size CSS declaration sets an element's dimensions exclusively by its height and width properties, ignoring its contents and descendants. This permits the browser to avoid slower layout calculations.containmentContainmentwidely2022-03-142024-09-14https://drafts.csswg.org/css-contain-2/#containment-sizehttps://developer.mozilla.org/docs/Web/CSS/Reference/Properties/containcss.properties.contain.sizehttps://nowyoucanuse.com/features--contain-size.html