{"id":665,"date":"2025-01-02T22:24:04","date_gmt":"2025-01-02T14:24:04","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=665"},"modified":"2025-01-02T22:24:04","modified_gmt":"2025-01-02T14:24:04","slug":"%e5%9c%a8-react-%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e4%b8%ad%ef%bc%8c%e6%80%8e%e4%b9%88%e6%a3%80%e6%9f%a5%e5%92%8c%e4%bf%ae%e5%a4%8d%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/01\/02\/%e5%9c%a8-react-%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e4%b8%ad%ef%bc%8c%e6%80%8e%e4%b9%88%e6%a3%80%e6%9f%a5%e5%92%8c%e4%bf%ae%e5%a4%8d%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%ef%bc%9f\/","title":{"rendered":"\u5728 React \u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u600e\u4e48\u68c0\u67e5\u548c\u4fee\u590d\u5185\u5b58\u6cc4\u6f0f\uff1f"},"content":{"rendered":"\n
\n

\u5728 React \u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u5185\u5b58\u6cc4\u6f0f\u901a\u5e38\u662f\u7531\u4e8e\u7ec4\u4ef6\u5728\u5378\u8f7d\u540e\u4ecd\u7136\u4fdd\u7559\u4e86\u5f15\u7528\uff0c\u4ece\u800c\u5bfc\u81f4\u65e0\u6cd5\u88ab\u5783\u573e\u56de\u6536\u5668\u6e05\u7406\u3002\u8fd9\u79cd\u95ee\u9898\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u4e0b\u964d\u6216\u8d44\u6e90\u8017\u5c3d\u3002\u4ee5\u4e0b\u662f\u68c0\u67e5\u548c\u4fee\u590d React \u5e94\u7528\u4e2d\u5185\u5b58\u6cc4\u6f0f\u7684\u65b9\u6cd5\u3002<\/p>\n<\/blockquote>\n\n\n\n

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\u4e00\u3001\u68c0\u67e5\u5185\u5b58\u6cc4\u6f0f<\/h3>\n\n\n\n

1. \u4f7f\u7528\u6d4f\u89c8\u5668\u5f00\u53d1\u5de5\u5177<\/strong><\/h4>\n\n\n\n

\u73b0\u4ee3\u6d4f\u89c8\u5668\u7684\u5f00\u53d1\u8005\u5de5\u5177\uff08\u5982 Chrome DevTools\uff09\u53ef\u4ee5\u5e2e\u52a9\u68c0\u6d4b\u5185\u5b58\u6cc4\u6f0f\uff1a<\/p>\n\n\n\n

    \n
  • Memory \u9762\u677f<\/strong>\uff1a\u8bb0\u5f55\u5185\u5b58\u5feb\u7167\uff08Heap Snapshot\uff09\uff0c\u67e5\u770b\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u548c\u672a\u91ca\u653e\u7684\u5bf9\u8c61\u3002<\/li>\n\n\n\n
  • Performance \u9762\u677f<\/strong>\uff1a\u8bb0\u5f55\u6027\u80fd\u5206\u6790\uff0c\u89c2\u5bdf\u5185\u5b58\u4f7f\u7528\u66f2\u7ebf\u3002\u5982\u679c\u5185\u5b58\u6301\u7eed\u589e\u957f\u5e76\u4e14\u6ca1\u6709\u4e0b\u964d\uff0c\u53ef\u80fd\u5b58\u5728\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n\n\n\n
  • Allocation Profiler<\/strong>\uff1a\u8ddf\u8e2a\u5bf9\u8c61\u5206\u914d\uff0c\u53d1\u73b0\u672a\u91ca\u653e\u7684\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n

    2. \u4f7f\u7528 React DevTools<\/strong><\/h4>\n\n\n\n

    React DevTools \u53ef\u4ee5\u5e2e\u52a9\u8bc6\u522b\u54ea\u4e9b\u7ec4\u4ef6\u5728\u6e32\u67d3\u540e\u6ca1\u6709\u88ab\u5378\u8f7d\uff0c\u5c24\u5176\u662f\u53ef\u80fd\u5b58\u5728\u672a\u6e05\u7406\u7684\u526f\u4f5c\u7528\u3002<\/p>\n\n\n\n

    3. \u5206\u6790\u5e38\u89c1\u6a21\u5f0f<\/strong><\/h4>\n\n\n\n

    \u901a\u8fc7\u4ee3\u7801\u68c0\u67e5\u4ee5\u4e0b\u5e38\u89c1\u5185\u5b58\u6cc4\u6f0f\u6a21\u5f0f\uff1a<\/p>\n\n\n\n

      \n
    • \u672a\u6e05\u7406\u7684 setTimeout<\/code> \u6216 setInterval<\/code><\/li>\n\n\n\n
    • \u672a\u53d6\u6d88\u7684\u7f51\u7edc\u8bf7\u6c42\u6216\u8ba2\u9605<\/li>\n\n\n\n
    • \u4fdd\u7559\u5f15\u7528\u7684\u95ed\u5305<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      \u4e8c\u3001\u4fee\u590d\u5185\u5b58\u6cc4\u6f0f<\/h3>\n\n\n\n

      1. \u6e05\u7406\u526f\u4f5c\u7528<\/strong><\/h4>\n\n\n\n

      \u4f7f\u7528 useEffect<\/code> \u65f6\uff0c\u786e\u4fdd\u5728\u7ec4\u4ef6\u5378\u8f7d\u65f6\u6e05\u7406\u6240\u6709\u526f\u4f5c\u7528\uff1a<\/p>\n\n\n\n

      useEffect(() => {\n  const intervalId = setInterval(() => {\n    console.log('Interval running');\n  }, 1000);\n\n  \/\/ \u6e05\u7406\u526f\u4f5c\u7528\n  return () => clearInterval(intervalId);\n}, []);<\/code><\/pre>\n\n\n\n
      2. \u907f\u514d\u672a\u53d6\u6d88\u7684\u7f51\u7edc\u8bf7\u6c42<\/strong><\/h4>\n\n\n\n
      \u5728\u7ec4\u4ef6\u5378\u8f7d\u65f6\u53d6\u6d88\u7f51\u7edc\u8bf7\u6c42\uff0c\u4f8b\u5982\u4f7f\u7528 AbortController<\/code>\uff1a<\/p>\n\n\n\n
      useEffect(() => {\n  const controller = new AbortController();\n\n  fetch('\/api\/data', { signal: controller.signal })\n    .then(response => response.json())\n    .catch(err => {\n      if (err.name === 'AbortError') {\n        console.log('Fetch aborted');\n      }\n    });\n\n  return () => controller.abort();\n}, []);<\/code><\/pre>\n\n\n\n
      3. \u6e05\u7406\u8ba2\u9605<\/strong><\/h4>\n\n\n\n
      \u5982\u679c\u7ec4\u4ef6\u8ba2\u9605\u4e86\u4e8b\u4ef6\uff08\u5982 WebSocket\u3001Redux Store \u6216\u5176\u4ed6\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\uff09\uff0c\u5728\u7ec4\u4ef6\u5378\u8f7d\u65f6\u9700\u8981\u53d6\u6d88\u8ba2\u9605\uff1a<\/p>\n\n\n\n
      useEffect(() => {\n  const handler = () => console.log('Event triggered');\n  window.addEventListener('resize', handler);\n\n  return () => window.removeEventListener('resize', handler);\n}, []);<\/code><\/pre>\n\n\n\n
      4. \u7ba1\u7406\u5f15\u7528<\/strong><\/h4>\n\n\n\n
        \n
      • \u907f\u514d\u5168\u5c40\u53d8\u91cf\u6216\u957f\u65f6\u95f4\u6301\u6709\u5bf9 DOM \u5143\u7d20\u7684\u5f15\u7528\u3002<\/li>\n\n\n\n
      • \u68c0\u67e5\u662f\u5426\u6709\u95ed\u5305\u610f\u5916\u6355\u83b7\u4e86\u7ec4\u4ef6\u7684\u72b6\u6001\u6216\u53d8\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n
        5. \u4f18\u5316\u957f\u5217\u8868<\/strong><\/h4>\n\n\n\n
        \u957f\u5217\u8868\u53ef\u80fd\u5bfc\u81f4\u5185\u5b58\u95ee\u9898\uff0c\u4f7f\u7528\u865a\u62df\u5316\u5e93\uff08\u5982 react-window<\/code> \u6216 react-virtualized<\/code>\uff09\u4f18\u5316\u6e32\u67d3\uff1a<\/p>\n\n\n\n
        import { FixedSizeList as List } from 'react-window';\n\nconst MyList = ({ items }) => (\n  <List\n    height={500}\n    itemCount={items.length}\n    itemSize={35}\n    width=\"100%\"\n  >\n    {({ index, style }) => <div style={style}>{items[index]}<\/div>}\n  <\/List>\n);<\/code><\/pre>\n\n\n\n
        6. \u68c0\u67e5\u7ec4\u4ef6\u5378\u8f7d<\/strong><\/h4>\n\n\n\n
        \u786e\u4fdd\u7ec4\u4ef6\u5728\u5378\u8f7d\u65f6\u80fd\u591f\u91ca\u653e\u6240\u6709\u8d44\u6e90\uff0c\u5c24\u5176\u662f\u5bf9\u4e8e\u5f39\u7a97\u3001\u6a21\u6001\u6846\u7b49\u52a8\u6001\u6302\u8f7d\u7684\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
        \n\n\n\n
        \u4e09\u3001\u9884\u9632\u5185\u5b58\u6cc4\u6f0f<\/h3>\n\n\n\n
        1. \u4f7f\u7528\u5de5\u5177\u76d1\u63a7<\/strong><\/h4>\n\n\n\n
          \n
        • \u5b9a\u671f\u901a\u8fc7\u6d4f\u89c8\u5668\u7684 Memory \u9762\u677f\u68c0\u67e5\u5185\u5b58\u4f7f\u7528\u3002<\/li>\n\n\n\n
        • \u4f7f\u7528\u5de5\u5177\u5982 ESLint \u63d2\u4ef6\uff08\u5982 eslint-plugin-react-hooks<\/code>\uff09\u5e2e\u52a9\u8bc6\u522b\u6f5c\u5728\u95ee\u9898\u3002<\/li>\n<\/ul>\n\n\n\n
          2. \u7ec4\u4ef6\u4f18\u5316<\/strong><\/h4>\n\n\n\n
            \n
          • \u907f\u514d\u4e0d\u5fc5\u8981\u7684\u72b6\u6001\u6216\u526f\u4f5c\u7528\u3002<\/li>\n\n\n\n
          • \u4f7f\u7528 React.memo<\/code> \u6216 useMemo<\/code> \u6765\u51cf\u5c11\u91cd\u65b0\u6e32\u67d3\u3002<\/li>\n<\/ul>\n\n\n\n
            3. \u5b9a\u671f\u4ee3\u7801\u5ba1\u67e5<\/strong><\/h4>\n\n\n\n
            \u56e2\u961f\u5185\u8fdb\u884c\u4ee3\u7801\u5ba1\u67e5\uff0c\u786e\u4fdd\u672a\u5f15\u5165\u4e0d\u5fc5\u8981\u7684\u8d44\u6e90\u5360\u7528\u548c\u672a\u6e05\u7406\u7684\u526f\u4f5c\u7528\u3002<\/p>\n\n\n\n
            \n\n\n\n
            \u56db\u3001\u5e38\u89c1\u573a\u666f\u7684\u5185\u5b58\u6cc4\u6f0f\u53ca\u4fee\u590d<\/h3>\n\n\n\n
            1. \u672a\u6e05\u7406\u7684\u8ba1\u65f6\u5668<\/strong><\/h4>\n\n\n\n
            useEffect(() => {\n  const timer = setTimeout(() => console.log('Timer finished'), 1000);\n\n  return () => clearTimeout(timer);\n}, []);<\/code><\/pre>\n\n\n\n
            2. \u672a\u6e05\u7406\u7684\u4e8b\u4ef6\u76d1\u542c\u5668<\/strong><\/h4>\n\n\n\n
            useEffect(() => {\n  const onScroll = () => console.log('Scrolling');\n  window.addEventListener('scroll', onScroll);\n\n  return () => window.removeEventListener('scroll', onScroll);\n}, []);<\/code><\/pre>\n\n\n\n
            3. \u672a\u53d6\u6d88\u7684\u5f02\u6b65\u8bf7\u6c42<\/strong><\/h4>\n\n\n\n
            useEffect(() => {\n  let isMounted = true;\n\n  fetch('\/api\/data')\n    .then(response => response.json())\n    .then(data => {\n      if (isMounted) {\n        console.log(data);\n      }\n    });\n\n  return () => { isMounted = false; };\n}, []);<\/code><\/pre>\n\n\n\n
            \n\n\n\n
            \u4e94\u3001\u76d1\u63a7\u5de5\u5177\u63a8\u8350<\/strong><\/h3>\n\n\n\n
              \n
            • React Developer Tools<\/strong>\uff1a\u68c0\u67e5 React \u7ec4\u4ef6\u7684\u5185\u5b58\u4f7f\u7528\u3002<\/li>\n\n\n\n
            • Chrome DevTools Memory<\/strong>\uff1a\u5206\u6790\u5185\u5b58\u5feb\u7167\u3002<\/li>\n\n\n\n
            • Profiler<\/strong>\uff1a\u68c0\u67e5\u6027\u80fd\u95ee\u9898\u548c\u6e32\u67d3\u6b21\u6570\u3002<\/li>\n\n\n\n
            • Heap.js<\/strong>\u00a0\u6216\u00a0Memory.js<\/strong>\uff1a\u76d1\u63a7\u5185\u5b58\u4f7f\u7528\u7684 JavaScript \u5de5\u5177\u5e93\u3002<\/li>\n<\/ul>\n\n\n\n
              \u901a\u8fc7\u6b63\u786e\u6e05\u7406\u548c\u76d1\u63a7\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514d\u548c\u4fee\u590d React \u5e94\u7528\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
              \u5728 React \u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u5185\u5b58\u6cc4\u6f0f\u901a\u5e38\u662f\u7531\u4e8e\u7ec4\u4ef6\u5728\u5378\u8f7d\u540e\u4ecd\u7136\u4fdd\u7559\u4e86\u5f15\u7528\uff0c\u4ece\u800c\u5bfc\u81f4\u65e0\u6cd5\u88ab\u5783\u573e\u56de\u6536\u5668\u6e05\u7406\u3002\u8fd9\u79cd\u95ee […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-665","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/665","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=665"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/665\/revisions"}],"predecessor-version":[{"id":666,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/665\/revisions\/666"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}