user888734 user888734 - 3 months ago 9
CSS Question

Can I do anything about "repaints on scroll" warning in Chrome for "overflow:scroll" div

In Chrome DevTools, under Rendering, there's an option to "Show potential scroll bottlenecks".

When I enabled this, some

div
elements I have on the screen with
overflow:scroll
show a flag at the top saying "repaints on scroll."

I can't find a lot of documentation on this feature, and I don't know whether it's something I can actually fix or improve upon, or just a statement of fact - the divs have content, and they do indeed scroll.

Answer

You can apply this CSS on the div with overflow: scroll or overflow: auto that create scroll bottlenecks.

transform: translateZ(0);
-webkit-transform: translateZ(0);

That will force the browser to create a new layer to paint this element, and sometimes fix scroll bottlenecks (especially with Webkit).

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