The CSS 'contain' property helps ensure that local changes don't cause dirtiness to spread higher up the tree. <https://drafts.csswg.org/css-containment/> https

The CSS 'contain' property helps ensure that local changes don't cause dirtiness to spread higher up the tree. <https://drafts.csswg.org/css-containment/> https://drafts.csswg.org/css-containment/> I know Chrome has an implementation that I think is still moving thru the shipping cycle, and the other browsers are working on theirs iirc.