update isra

src/hooks/useSlider.js

@@ -40,7 +40,7 @@ export default function useSlider(defaultSize) {
 
 		return () => {
 			document.removeEventListener('keydown', fn);
-			document.getElementById('slider').removeEventListener('mouseleave', fn2);
+			document.getElementById('slider')?.removeEventListener('mouseleave', fn2);
 		};
 	}, [value]);