{"id":38633,"date":"2023-04-22T21:51:25","date_gmt":"2022-12-01T21:37:34","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e9%80%9a%e8%bf%87%e7%a4%ba%e4%be%8b%e8%ae%b2%e8%a7%a3react%e7%9a%84useeffect%e9%87%8d%e6%9e%84%ef%bc%9a%e5%ad%a6%e4%b9%a0%e5%85%ac%e5%bc%8f%e6%96%87%e6%a1%a3\/"},"modified":"2024-04-30T00:48:31","modified_gmt":"2024-04-29T16:48:31","slug":"%e9%80%9a%e8%bf%87%e7%a4%ba%e4%be%8b%e8%ae%b2%e8%a7%a3react%e7%9a%84useeffect%e9%87%8d%e6%9e%84%ef%bc%9a%e5%ad%a6%e4%b9%a0%e5%85%ac%e5%bc%8f%e6%96%87%e6%a1%a3","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e9%80%9a%e8%bf%87%e7%a4%ba%e4%be%8b%e8%ae%b2%e8%a7%a3react%e7%9a%84useeffect%e9%87%8d%e6%9e%84%ef%bc%9a%e5%ad%a6%e4%b9%a0%e5%85%ac%e5%bc%8f%e6%96%87%e6%a1%a3\/","title":{"rendered":"\u901a\u8fc7\u793a\u4f8b\u8bb2\u89e3React\u7684useEffect\u91cd\u6784\uff1a\u5b66\u4e60\u516c\u5f0f\u6587\u6863"},"content":{"rendered":"

\u9996\u5148 \u200b<\/h1>\n

2023\u5e743\u6708\uff0cReact\u5b98\u65b9\u6587\u6863\u8fdb\u884c\u4e86\u66f4\u65b0\u3002
\n\u5c24\u5176\u662f\u5173\u4e8euseEffect\u7684\u9875\u9762\uff0c\u50cf\u662f”You Might Not Need an Effect”\u8fd9\u4e00\u90e8\u5206\u5728Twitter\u7b49\u5e73\u53f0\u4e0a\u5f15\u8d77\u4e86\u5f88\u5927\u7684\u8ba8\u8bba\u3002<\/p>\n

\u5728\u672c\u6587\u4e2d\uff0c\u5c06\u4ecb\u7ecdMI-6\u516c\u53f8\u7684SaaS\u4ea7\u54c1”miHub”\u5f00\u53d1\u56e2\u961f\u6839\u636e\u4e0a\u8ff0\u6587\u4ef6\u8fdb\u884c\u91cd\u6784\u5de5\u4f5c\u4e2d\u7ecf\u5e38\u89c1\u5230\u7684\u4e00\u79cd\u6a21\u5f0f\uff0c\u8be5\u6a21\u5f0f\u53ef\u4ee5\u6d88\u9664useEffect\u3002<\/p>\n

\u9009\u98791: \u4e0d\u5fc5\u8981\u7684\u72b6\u6001<\/h1>\n

\u5982\u679cprops\u4e2d\u4f20\u5165\u7684\u503c\u662f\u5728\u7236\u7ec4\u4ef6\u4e2d\u8fdb\u884cfetch\u7684\u6570\u636e\uff0c\u90a3\u4e48\u5c31\u4f1a\u7ecf\u5e38\u9047\u5230\u8fd9\u79cd\u60c5\u51b5\u7684\u63cf\u8ff0\u3002
\n\u7531\u4e8e\u65e0\u6cd5\u786e\u5b9a\u503c\u4f55\u65f6\u88ab\u8d4b\u503c\uff0c\u56e0\u6b64\u6211\u8bd5\u56fe\u4f7f\u7528useEffect\u786e\u4fdd\u8ba1\u7b97\u7ed3\u679c\u88ab\u6b63\u786e\u53cd\u6620\u5e76\u8fdb\u884c\u6e32\u67d3\u3002<\/p>\n

import<\/span> React<\/span>,<\/span> {<\/span> useState<\/span>,<\/span> useEffect<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\ntype<\/span> =<\/span> Props<\/span> =<\/span> {<\/span>\r\n  count<\/span>:<\/span> number<\/span>\r\n  max<\/span>:<\/span> number<\/span>\r\n}<\/span>\r\n\r\nexport<\/span> const<\/span> Counter<\/span>:<\/span> React<\/span>.<\/span>FC<\/span><<\/span>Props<\/span>><\/span> =<\/span> (<\/span>props<\/span>)<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>isOverMax<\/span>,<\/span> setIsOverMax<\/span>]<\/span> =<\/span> useState<\/span><<\/span>boolean<\/span>><\/span>(<\/span>false<\/span>);<\/span>\r\n\r\n  useEffect<\/span>(()<\/span> =><\/span> {<\/span>\r\n    setIsOverMax<\/span>(<\/span>props<\/span>.<\/span>count<\/span> >=<\/span> props<\/span>.<\/span>max<\/span>);<\/span>\r\n  },<\/span> [<\/span>props<\/span>.<\/span>count<\/span>,<\/span> props<\/span>.<\/span>max<\/span>]);<\/span>\r\n\r\n  ...<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4ee5\u4e0b\u7684\u63cf\u8ff0\u5df2\u7ecf\u8db3\u591f\u4e86\u3002<\/p>\n
export<\/span> const<\/span> Counter<\/span>:<\/span> React<\/span>.<\/span>FC<\/span><<\/span>Props<\/span>><\/span> =<\/span> (<\/span>props<\/span>)<\/span> =><\/span> {<\/span>\r\n  const<\/span> isOverMax<\/span> =<\/span> props<\/span>.<\/span>count<\/span> >=<\/span> props<\/span>.<\/span>max<\/span>;<\/span>\r\n\r\n  ...<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5f53props\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u7ec4\u4ef6\u4f1a\u88ab\u91cd\u65b0\u8ba1\u7b97\uff0c\u8fd9\u5c31\u662f\u539f\u56e0\u3002\u4f7f\u7528useEffect\u65f6\uff0c\u4f1a\u53d1\u751f\u4ee5\u4e0b\u65e0\u7528\u7684\u8ba1\u7b97\u6d41\u7a0b\uff1aprops\u53d8\u5316\u2192\u91cd\u65b0\u8ba1\u7b97\u2192\u6e32\u67d3\u2192useEffect\u2192state\u53d8\u5316\u2192\u91cd\u65b0\u8ba1\u7b97\u2192\u6e32\u67d3<\/p>\n
Option:
\n\u65b9\u6cd5\u4e8c\uff1a\u5728\u6570\u636e\u63d0\u53d6\u8fc7\u7a0b\u4e2d\u4f7f\u7528\u94a9\u5b50\u51fd\u6570\u3002<\/h1>\n
\u63d0\u5230\uff0c\u8fd9\u4e0e\u6a21\u5f0f1\u76f8\u4f3c\uff0c\u4f46\u662f\u901a\u8fc7\u5c06\u5176\u8f6c\u5316\u4e3ahooks\uff0c\u53ef\u4ee5\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684Effect\u3002useEffect\u5728\u5f00\u5934\u7684\u5b98\u65b9\u6587\u6863\u4e2d\u63d0\u5230\u3002<\/p>\n
Effects\u662fReact\u8303\u5f0f\u7684\u9003\u751f\u53e3\u3002\u5b83\u8ba9\u60a8\u53ef\u4ee5\u201c\u8d70\u51fa\u53bb\u201d\uff0c\u5e76\u5c06\u7ec4\u4ef6\u4e0e\u975eReact\u5c0f\u90e8\u4ef6\u3001\u7f51\u7edc\u6216\u6d4f\u89c8\u5668DOM\u7b49\u5916\u90e8\u7cfb\u7edf\u540c\u6b65\u3002<\/p><\/blockquote>\n
\u6b63\u5982\u67d0\u4e9b\u60c5\u51b5\u4e0b\u6240\u63a8\u8350\u7684\u90a3\u6837\uff0c\u5728\u4e0e\u7f51\u7edc\u8fdb\u884c\u901a\u4fe1\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u4f5c\u4e3a\u793a\u4f8b\u3002<\/p>\n
import<\/span> React<\/span>,<\/span> {<\/span> useState<\/span>,<\/span> useEffect<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> fetchSomeData<\/span> }<\/span> from<\/span> '<\/span>.\/api<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> ExampleComponent<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>data<\/span>,<\/span> setData<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>null<\/span>);<\/span>\r\n\r\n  useEffect<\/span>(()<\/span> =><\/span> {<\/span>\r\n    const<\/span> fetchData<\/span> =<\/span> async <\/span>()<\/span> =><\/span> {<\/span>\r\n      const<\/span> response<\/span> =<\/span> await<\/span> fetchSomeData<\/span>();<\/span>\r\n      setData<\/span>(<\/span>response<\/span>.<\/span>data<\/span>);<\/span>\r\n    };<\/span>\r\n\r\n    fetchData<\/span>();<\/span>\r\n  },<\/span> []);<\/span>\r\n  ...<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528axios\u6216\u5176\u4ed6\u624b\u6bb5\u6765\u83b7\u53d6\u6570\u636e\uff0c\u7136\u540e\u4f7f\u7528useEffect\u6765\u786e\u4fdd\u7ed3\u679c\u80fd\u591f\u88ab\u6b63\u786e\u663e\u793a\u3002<\/p>\n
\u5728miHub\u4e2d\uff0c\u6211\u4eec\u6700\u8fd1\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3auseFetch\u7684hooks\uff0c\u7528\u4e8e\u62bd\u8c61\u5316\u6570\u636e\u83b7\u53d6\u8fc7\u7a0b\u3002
\n\u8fd9\u4e2ahooks\u7684\u5185\u90e8\u6267\u884c\u4e86\u4ee5\u4e0b\u7c7b\u4f3c\u7684\u64cd\u4f5c\u3002<\/p>\n
const<\/span> useFetch<\/span> =<\/span> (<\/span>url<\/span>)<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>data<\/span>,<\/span> setData<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>null<\/span>);<\/span>\r\n  const<\/span> [<\/span>isLoading<\/span>,<\/span> setIsLoading<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>true<\/span>);<\/span>\r\n  const<\/span> [<\/span>error<\/span>,<\/span> setError<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>null<\/span>);<\/span>\r\n\r\n  useEffect<\/span>(()<\/span> =><\/span> {<\/span>\r\n    const<\/span> fetchData<\/span> =<\/span> async <\/span>()<\/span> =><\/span> {<\/span>\r\n      try<\/span> {<\/span>\r\n        const<\/span> response<\/span> =<\/span> await<\/span> fetch<\/span>(<\/span>url<\/span>);<\/span>\r\n        if <\/span>(<\/span>!<\/span>response<\/span>.<\/span>ok<\/span>)<\/span> {<\/span>\r\n          throw<\/span> new<\/span> Error<\/span>(<\/span>'<\/span>Network response was not ok<\/span>'<\/span>);<\/span>\r\n        }<\/span>\r\n        const<\/span> json<\/span> =<\/span> await<\/span> response<\/span>.<\/span>json<\/span>();<\/span>\r\n        setData<\/span>(<\/span>json<\/span>);<\/span>\r\n      }<\/span> catch <\/span>(<\/span>error<\/span>)<\/span> {<\/span>\r\n        setError<\/span>(<\/span>error<\/span>);<\/span>\r\n      }<\/span> finally<\/span> {<\/span>\r\n        setIsLoading<\/span>(<\/span>false<\/span>);<\/span>\r\n      }<\/span>\r\n    };<\/span>\r\n    fetchData<\/span>();<\/span>\r\n  },<\/span> [<\/span>url<\/span>]);<\/span>\r\n\r\n  return<\/span> {<\/span> data<\/span>,<\/span> isLoading<\/span>,<\/span> error<\/span> };<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
\u5229\u7528\u8fd9\u4e2ahooks\uff0c\u6700\u521d\u7684\u4ee3\u7801\u53ef\u4ee5\u6539\u6210\u5982\u4e0b\uff1a<\/p>\n
const<\/span> ExampleComponent<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> {<\/span> data<\/span>,<\/span> isLoading<\/span>,<\/span> error<\/span> }<\/span> =<\/span> useFetch<\/span>(<\/span>'<\/span>\/some-endpoint<\/span>'<\/span>);<\/span>\r\n  ...<\/span>\r\n};<\/span>\r\n\r\n<\/code><\/pre>\n
\u5f53\u6536\u5230\u56de\u5e94\u540e\uff0c\u7531\u4e8ehooks\u5185\u90e8\u7684state\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u56e0\u6b64\u5373\u4f7f\u5728\u7ec4\u4ef6\u5185\u90e8\u6ca1\u6709\u4f7f\u7528useEffect\uff0c\u6570\u636e\u4e5f\u4f1a\u4e0e\u901a\u4fe1\u7ed3\u679c\u4fdd\u6301\u540c\u6b65\u3002<\/p>\n
\u5982\u679c\u53ef\u4ee5\u5728\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u5185\u8fdb\u884c\u5904\u7406\uff0c\u90a3\u4e48\u9009\u62e9\u6a21\u5f0f3\u3002<\/h1>\n
\u5728React\u7ec4\u4ef6\u4e2d\uff0c\u5f53\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u7ecf\u5e38\u4f7f\u7528useEffect hook\u6765\u6267\u884c\u67d0\u4e9b\u5904\u7406\u3002<\/p>\n
import<\/span> React<\/span>,<\/span> {<\/span> useState<\/span>,<\/span> useEffect<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> ExampleComponent<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>count<\/span>,<\/span> setCount<\/span>]<\/span> =<\/span> useState<\/span><<\/span>number<\/span>><\/span>(<\/span>0<\/span>);<\/span>\r\n  const<\/span> [<\/span>message<\/span>,<\/span> setMessage<\/span>]<\/span> =<\/span> useState<\/span><<\/span>string<\/span>><\/span>(<\/span>''<\/span>);<\/span>\r\n\r\n  useEffect<\/span>(()<\/span> =><\/span> {<\/span>\r\n    setMessage<\/span>(<\/span>'<\/span>count has changed to<\/span>'<\/span>,<\/span> count<\/span>);<\/span>\r\n  },<\/span> [<\/span>count<\/span>]);<\/span>\r\n\r\n  const<\/span> handleButtonClick<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n    setCount<\/span>(<\/span>count<\/span> +<\/span> 1<\/span>);<\/span>\r\n  };<\/span>\r\n\r\n  ...<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
\u7136\u800c\uff0c\u5f53\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u60a8\u4e5f\u53ef\u4ee5\u5728\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u5185\u76f4\u63a5\u6267\u884c\u6240\u9700\u7684\u64cd\u4f5c\u3002<\/p>\n
const<\/span> ExampleComponent<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>count<\/span>,<\/span> setCount<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>0<\/span>);<\/span>\r\n  const<\/span> [<\/span>message<\/span>,<\/span> setMessage<\/span>]<\/span> =<\/span> useState<\/span><<\/span>string<\/span>><\/span>(<\/span>''<\/span>);<\/span>\r\n\r\n  const<\/span> handleButtonClick<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n    setCount<\/span>(<\/span>count<\/span> +<\/span> 1<\/span>);<\/span>\r\n    setMessage<\/span>(<\/span>'<\/span>count has changed to<\/span>'<\/span>,<\/span> count<\/span>);<\/span>\r\n  };<\/span>\r\n  ...<\/span>\r\n};<\/span>\r\n\r\n<\/code><\/pre>\n
\u5982\u679c\u9700\u8981\u5f02\u6b65\u5904\u7406\uff0c\u5219\u4f7f\u7528useEffect\u662f\u5408\u9002\u7684\u3002\u4f46\u662f\uff0c\u5982\u679c\u9700\u8981\u7acb\u5373\u5bf9\u7528\u6237\u7684\u64cd\u4f5c\u8fdb\u884c\u5904\u7406\uff0c\u5219\u53ef\u4ee5\u5c06\u4ee3\u7801\u5199\u5728\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u4e2d\uff0c\u4ece\u800c\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u6e32\u67d3\u3002<\/p>\n
\u6a21\u5f0f4\uff1a\u5c06\u6570\u636e\u83b7\u53d6\u79fb\u81f3\u7236\u7ec4\u4ef6\u3002<\/h1>\n
\u5728\u8fdb\u884c\u7ec4\u4ef6\u62c6\u5206\u65f6\uff0c\u5982\u679c\u5c06\u6570\u636e\u83b7\u53d6\u4e5f\u6574\u5408\u5230\u5b50\u7ec4\u4ef6\u4e2d\uff0c\u53ef\u80fd\u4f1a\u4f7f\u5176\u66f4\u52a0\u6e05\u6670\u3002<\/p>\n
\/\/ Parent\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/span>\r\nimport<\/span> React<\/span>,<\/span> {<\/span> useEffect<\/span>,<\/span> useState<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\nimport<\/span> Child<\/span> from<\/span> '<\/span>.\/Child<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> Parent<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>data<\/span>,<\/span> setData<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>null<\/span>);<\/span>\r\n\r\n  useEffect<\/span>(()<\/span> =><\/span> {<\/span>\r\n    someFunction<\/span>()<\/span>\r\n  },<\/span> [<\/span>data<\/span>]);<\/span>\r\n\r\n  const<\/span> handleChildData<\/span> =<\/span> (<\/span>childData<\/span>)<\/span> =><\/span> {<\/span>\r\n    setData<\/span>(<\/span>childData<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <><\/span>\r\n      <<\/span>Child<\/span> onData<\/span>=<\/span>{<\/span>handleChildData<\/span>}<\/span> data<\/span>=<\/span>{<\/span>data<\/span>}<\/span> \/><\/span>\r\n      ...\r\n    <\/><\/span>\r\n  )<\/span>\r\n}<\/span>\r\n\r\n\/\/ Child\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/span>\r\nimport<\/span> React<\/span>,<\/span> {<\/span> useEffect<\/span>,<\/span> useState<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> Child<\/span> =<\/span> ({<\/span> onData<\/span>,<\/span> data<\/span> })<\/span> =><\/span> {<\/span>\r\n  const<\/span> {<\/span> request<\/span> }<\/span> =<\/span> useRequest<\/span>(<\/span>'<\/span>get<\/span>'<\/span>,<\/span> '<\/span>https:\/\/api.example.com\/child-data<\/span>'<\/span>);<\/span>\r\n\r\n  const<\/span> onClick<\/span> =<\/span> async <\/span>()<\/span> =><\/span> {<\/span>\r\n    const<\/span> response<\/span> =<\/span> await<\/span> request<\/span>();<\/span>\r\n    onData<\/span>(<\/span>response<\/span>.<\/span>data<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <><\/span>\r\n      <<\/span>Button<\/span> onClick<\/span>=<\/span>{<\/span>onClick<\/span>}<\/span>><\/span>get!<\/<\/span>Button<\/span>><\/span>\r\n      <<\/span>div<\/span>><\/span>{<\/span>data<\/span>}<\/span><\/<\/span>div<\/span>><\/span>\r\n    <\/><\/span>\r\n  )<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6211\u5011\u6709\u9019\u6a23\u7684\u4e00\u500b\u5be6\u73fe\u65b9\u6cd5\uff0c\u4f46\u662f\u9019\u6a23\u505a\u7684\u8a71\u3002<\/p>\n
    \n
  • \n
      \u5b50\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u30c7\u30fc\u30bf\u53d6\u5f97<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          \u89aa\u306esetter\u306b\u6e21\u3059<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \n
          • \n
              state\u306e\u5909\u5316\u3067\u89aa\u5b50\u3068\u3082\u306b\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                \n
              • \n
                  \u89aa\u306fuseEffect\u3067\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u3092\u691c\u77e5<\/ul>\n<\/li>\n<\/ul>\n
                   <\/p>\n
                    \u51e6\u7406\u306e\u7d50\u679c\u307e\u305f\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0<\/ul>\n
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                    \n\u6b64\u5916\uff0c\u6570\u636e\u6d41\u4e5f\u4e0d\u5bb9\u6613\u8ffd\u8e2a\uff0c\u5bb9\u6613\u4ea7\u751f\u9519\u8bef\u72b6\u51b5\u3002<\/p>\n
                    \/\/ Parent\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/span>\r\nimport<\/span> React<\/span>,<\/span> {<\/span> useEffect<\/span>,<\/span> useState<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\nimport<\/span> Child<\/span> from<\/span> '<\/span>.\/Child<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> Parent<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  const<\/span> [<\/span>data<\/span>,<\/span> setData<\/span>]<\/span> =<\/span> useState<\/span>(<\/span>null<\/span>);<\/span>\r\n\r\n  useEffect<\/span>(()<\/span> =><\/span> {<\/span>\r\n    someFunction<\/span>()<\/span>\r\n  },<\/span> [<\/span>data<\/span>]);<\/span>\r\n\r\n  const<\/span> {<\/span> request<\/span> }<\/span> =<\/span> useRequest<\/span>(<\/span>'<\/span>get<\/span>'<\/span>,<\/span> '<\/span>https:\/\/api.example.com\/child-data<\/span>'<\/span>);<\/span>\r\n\r\n  const<\/span> onClick<\/span> =<\/span> async <\/span>()<\/span> =><\/span> {<\/span>\r\n    const<\/span> response<\/span> =<\/span> await<\/span> request<\/span>();<\/span>\r\n    setData<\/span>(<\/span>response<\/span>.<\/span>data<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <><\/span>\r\n      <<\/span>Child<\/span> onClick<\/span>=<\/span>{<\/span>onClick<\/span>}<\/span> data<\/span>=<\/span>{<\/span>data<\/span>}<\/span> \/><\/span>\r\n      ...\r\n    <\/><\/span>\r\n  )<\/span>\r\n}<\/span>\r\n\r\n\/\/ Child\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/span>\r\nimport<\/span> React<\/span>,<\/span> {<\/span> useEffect<\/span>,<\/span> useState<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> Child<\/span> =<\/span> ({<\/span> onClick<\/span>,<\/span> data<\/span> })<\/span> =><\/span> {<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <><\/span>\r\n      <<\/span>Button<\/span> onClick<\/span>=<\/span>{<\/span>onClick<\/span>}<\/span>><\/span>get!<\/<\/span>Button<\/span>><\/span>\r\n      <<\/span>div<\/span>><\/span>{<\/span>data<\/span>}<\/span><\/<\/span>div<\/span>><\/span>\r\n    <\/><\/span>\r\n  )<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                    \u91cd\u6784\u540e\uff0c\u6211\u4eec\u5728\u7236\u7ec4\u4ef6\u4e2d\u7f16\u5199\u6570\u636e\u83b7\u53d6\u7684\u903b\u8f91\u3002\u901a\u8fc7\u5728props\u4e2d\u4f20\u9012onClick\u6765\u53d1\u9001\u8bf7\u6c42\uff0c\u4f7f\u5f97\u5904\u7406\u903b\u8f91\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n
                      \n
                    • \n
                        \u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u30c7\u30fc\u30bf\u53d6\u5f97<\/ul>\n<\/li>\n<\/ul>\n
                         <\/p>\n
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                          \u53ea\u9700\u8981\u4e24\u4e2a\u6b65\u9aa4\u5c31\u53ef\u4ee5\u5b8c\u6210\u5904\u7406\uff0c\u5e76\u4e14\u6570\u636e\u6d41\u53d8\u5f97\u66f4\u52a0\u6e05\u6670\u6613\u61c2\u3002<\/p>\n
                          \u603b\u7ed3<\/h1>\n
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                          \u5728miHub\u4e2d\uff0c\u867d\u7136\u516c\u5f0f\u6587\u4ef6\u4e2d\u8fd8\u4ecb\u7ecd\u4e86\u5176\u4ed6\u7684\u4f8b\u5b50\uff0c\u4f46\u6211\u4eec\u57fa\u672c\u4e0a\u80fd\u591f\u901a\u8fc7\u4e0a\u8ff0\u6a21\u5f0f\u6765\u6d88\u9664\u4e0d\u5fc5\u8981\u7684Effect\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                          \u9996\u5148 \u200b 2023\u5e743\u6708\uff0cReact\u5b98\u65b9\u6587\u6863\u8fdb\u884c\u4e86\u66f4\u65b0\u3002 \u5c24\u5176\u662f\u5173\u4e8euseEffect\u7684\u9875\u9762\uff0c\u50cf\u662f&#8221 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-38633","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u901a\u8fc7\u793a\u4f8b\u8bb2\u89e3React\u7684useEffect\u91cd\u6784\uff1a\u5b66\u4e60\u516c\u5f0f\u6587\u6863 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u901a\u8fc7\u793a\u4f8b\u8bb2\u89e3react\u7684useeffect\u91cd\u6784\uff1a\u5b66\u4e60\u516c\u5f0f\u6587\u6863\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u901a\u8fc7\u793a\u4f8b\u8bb2\u89e3React\u7684useEffect\u91cd\u6784\uff1a\u5b66\u4e60\u516c\u5f0f\u6587\u6863\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 \u200b 2023\u5e743\u6708\uff0cReact\u5b98\u65b9\u6587\u6863\u8fdb\u884c\u4e86\u66f4\u65b0\u3002 \u5c24\u5176\u662f\u5173\u4e8euseEffect\u7684\u9875\u9762\uff0c\u50cf\u662f&#8221 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u901a\u8fc7\u793a\u4f8b\u8bb2\u89e3react\u7684useeffect\u91cd\u6784\uff1a\u5b66\u4e60\u516c\u5f0f\u6587\u6863\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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