实现

createUpdateEffect/index.js

---

import { useRef } from "react";

export function createUpdateEffect(hook) {
  return function (effect, deps) {
    const isMounted = useRef(false);

    hook(() => {
      return () => (isMounted.current = false);
    }, []);

    hook(() => {
      if (!isMounted.current) {
        isMounted.current = true;
      } else {
        return effect();
      }
    }, deps);
  };
}