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Remove listener only if it exists

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This commit is contained in:
dominik-zeglen 2019-11-06 16:51:02 +01:00
parent 2d9fc51bfb
commit 928f19c879
1 changed files with 5 additions and 1 deletions
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6
src/hooks/useElementScroll.ts
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@ -35,7 +35,11 @@ function useElementScroll(anchor: MutableRefObject<HTMLElement>): Position {
); );
anchor.current.addEventListener("scroll", handleScroll); anchor.current.addEventListener("scroll", handleScroll);
return () => anchor.current.removeEventListener("scroll", handleScroll); return () => {
if (!!anchor.current) {
anchor.current.removeEventListener("scroll", handleScroll);
}
};
} }
}, [anchor.current]); }, [anchor.current]);