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guard event listener from null values

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This commit is contained in:
Germain Souquet 2021-05-28 17:37:29 +01:00
parent 18188538f6
commit fd69fce1ba
2 changed files with 4 additions and 4 deletions
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4
src/components/views/rooms/RoomSublist.tsx
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@ -249,13 +249,13 @@ export default class RoomSublist extends React.Component<IProps, IState> {
RoomListStore.instance.on(LISTS_UPDATE_EVENT, this.onListsUpdated);
// 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.tilesRef.current.addEventListener("scroll", this.onScrollPrevent, { passive: true });
this.tilesRef.current?.addEventListener("scroll", this.onScrollPrevent, { passive: true });
}
public componentWillUnmount() {
defaultDispatcher.unregister(this.dispatcherRef);
RoomListStore.instance.off(LISTS_UPDATE_EVENT, this.onListsUpdated);
this.tilesRef.current.removeEventListener("scroll", this.onScrollPrevent);
this.tilesRef.current?.removeEventListener("scroll", this.onScrollPrevent);
}
private onListsUpdated = () => {