containThe contain CSS property sets limits to the scope of styles, layout, and paint rendering for speed and efficiency. The none keyword value disables containment, strict is equivalent to contain: size layout style paint, and content is equivalent to contain: layout style paint.containmentContainmentwidely2022-03-142024-09-14https://drafts.csswg.org/css-contain-2/#contain-propertycss-containmenthttps://developer.mozilla.org/docs/Web/CSS/Reference/Properties/containcss.properties.containcss.properties.contain.contentcss.properties.contain.nonecss.properties.contain.stricthttps://nowyoucanuse.com/features--contain.html