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Use passive option for scroll handler

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This commit is contained in:
Germain Souquet 2021-05-28 14:59:14 +01:00
parent 71b217e4a1
commit f10e95956b
5 changed files with 32 additions and 7 deletions
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4
src/components/structures/IndicatorScrollbar.js
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@ -59,7 +59,9 @@ export default class IndicatorScrollbar extends React.Component {
_collectScroller(scroller) {
if (scroller && !this._scrollElement) {
this._scrollElement = scroller;
this._scrollElement.addEventListener("scroll", this.checkOverflow);
// Using the passive option to not block the main thread
// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#improving_scrolling_performance_with_passive_listeners
this._scrollElement.addEventListener("scroll", this.checkOverflow, { passive: true });
this.checkOverflow();
}
}