“Make no mistake: This is not your diary. You are not letting it all hang out. You are picking and choosing every single word.”

Dani Shapiro

contain

The contain CSS property allows an author to indicate that an element and its contents are, as much as possible, independent of the rest of the document tree. This allows the browser to recalculate layout, style, paint, size, or any combination of them for a limited area of the DOM and not the entire page, leading to obvious performance benefits.
contain css reference