javascript - useWindowSize如何加上防抖优化？

Question

useWindowResize的代码如下，如何加防抖，优化效率，减少触发次数

import { useState, useEffect } from "react";

// Usage
function App() {
  const size = useWindowSize();

  return (
    <div>
      {size.width}px / {size.height}px
    </div>
  );
}

// Hook
function useWindowSize() {
  // Initialize state with undefined width/height so server and client renders match
  // Learn more here: https://joshwcomeau.com/react/the-perils-of-rehydration/
  const [windowSize, setWindowSize] = useState({
    width: undefined,
    height: undefined,
  });

  useEffect(() => {
    // Handler to call on window resize
    function handleResize() {
      // Set window width/height to state
      setWindowSize({
        width: window.innerWidth,
        height: window.innerHeight,
      });
    }

    // Add event listener
    window.addEventListener("resize", handleResize);

    // Call handler right away so state gets updated with initial window size
    handleResize();

    // Remove event listener on cleanup
    return () => window.removeEventListener("resize", handleResize);
  }, []); // Empty array ensures that effect is only run on mount

  return windowSize;
}

Answer 1

优化参考：

import { useState, useEffect } from "react";

// Usage
function App() {
  const size = useWindowSize();

  return (
    <div>
      {size.width}px / {size.height}px
    </div>
  );
}

// Hook
function useWindowSize() {
  const [windowSize, setWindowSize] = useState({
    width: undefined,
    height: undefined,
  });

  useEffect(() => {
    let timeoutId = null;
    const debounceDelay = 300; 

    function handleResize() {
      if (timeoutId) {
        clearTimeout(timeoutId);
      }
      timeoutId = setTimeout(() => {
        setWindowSize({
          width: window.innerWidth,
          height: window.innerHeight,
        });
      }, debounceDelay);
    }

    window.addEventListener("resize", handleResize);
    handleResize();

    return () => {
      clearTimeout(timeoutId);
      window.removeEventListener("resize", handleResize);
    };
  }, []);

  return windowSize;
}

Answer 2

const debouncedHandleResize = debounce(handleResize, 500);
window.addEventListener('resize', debouncedHandleResize);
return () => window.removeEventListener('resize', debouncedHandleResize);

你参考一下呢