[londons_explore]

Browsers give no control over when areas are repainted. If you change a bit of CSS or DOM, it will be repainted in the next frame. There is no way to say 'dont paint this yet'.

The thing the contain property does is ensure that a particular Dom change won't affect pixels outside the element involved, which means the browser won't need to do any extra repainting.

[extra88]

You can say “don’t paint this yet” if it’s not within the viewport. In addition to ‘contain’ there’s also ‘content-visibility’.

https://developer.mozilla.org/en-US/docs/Web/CSS/content-vis...