Scroll position is lost

[zhang1024899756]

When the contents of a wrapped element overflow, the scroll position is lost. How do you handle this? There are unfriendly flashes when using Scrolltop
const scrollbar= document.getElementsByClassName('scrollbar')[0];
const scrollTop = scrollbar.scrollTop
if (scrollTop ) { setTimeout(() => { scrollTop .scrollTop = scrollTop }, 0) }
There are unfriendly flashes when using Scrolltop