优化

client/shared/hooks/useMountedState.ts

@@ -0,0 +1,18 @@
+import { useCallback, useEffect, useRef } from 'react';
+
+// Reference: https://github.com/streamich/react-use/blob/master/src/useMountedState.ts
+
+export function useMountedState(): () => boolean {
+  const mountedRef = useRef<boolean>(false);
+  const get = useCallback(() => mountedRef.current, []);
+
+  useEffect(() => {
+    mountedRef.current = true;
+
+    return () => {
+      mountedRef.current = false;
+    };
+  }, []);
+
+  return get;
+}