{"id":38341,"date":"2023-09-17T09:31:55","date_gmt":"2022-11-17T03:22:31","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8suspense%e5%92%8creact-lazy%e8%bf%9b%e8%a1%8c%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e3%80%82\/"},"modified":"2024-05-04T00:08:22","modified_gmt":"2024-05-03T16:08:22","slug":"%e4%bd%bf%e7%94%a8suspense%e5%92%8creact-lazy%e8%bf%9b%e8%a1%8c%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8suspense%e5%92%8creact-lazy%e8%bf%9b%e8%a1%8c%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e3%80%82\/","title":{"rendered":"\u4f7f\u7528Suspense\u548cReact.lazy\u8fdb\u884c\u6027\u80fd\u4f18\u5316"},"content":{"rendered":"

\u9996\u5148<\/h2>\n
\"chatGPT.png\"<\/div>\n

\u4ee3\u7801\u5206\u5272 (Code splitting)<\/h2>\n

\u5f53\u8fdb\u884c\u4ee3\u7801\u5206\u5272\u65f6\uff0c\u7528\u6237\u53ea\u9700\u52a0\u8f7d\u6240\u9700\u4ee3\u7801\uff0c\u65e0\u9700\u52a0\u8f7d\u5197\u4f59\u4ee3\u7801\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u521d\u59cb\u52a0\u8f7d\u65f6\u6240\u9700\u7684\u4ee3\u7801\u91cf\u3002<\/p>\n

\u4ee3\u7801\u5206\u5272\u7684\u65b9\u6cd5<\/h3>\n

1. \u5bfc\u5165() r\u00f9)<\/h4>\n
import<\/span> {<\/span> add<\/span> }<\/span> from<\/span> '<\/span>.\/math<\/span>'<\/span>;<\/span>\r\n\r\nconsole<\/span>.<\/span>log<\/span>(<\/span>add<\/span>(<\/span>16<\/span>,<\/span> 26<\/span>));<\/span>\r\n<\/code><\/pre>\n
import<\/span>(<\/span>\"<\/span>.\/math<\/span>\"<\/span>).<\/span>then<\/span>(<\/span>math<\/span> =><\/span> {<\/span>\r\n  console<\/span>.<\/span>log<\/span>(<\/span>math<\/span>.<\/span>add<\/span>(<\/span>16<\/span>,<\/span> 26<\/span>));<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
2. React.lazy\u53ef\u4ee5\u5728React\u4e2d\u5b9e\u73b0\u61d2\u52a0\u8f7d\u3002<\/h4>\n
import<\/span> OtherComponent<\/span> from<\/span> '<\/span>.\/OtherComponent<\/span>'<\/span>;<\/span>\r\n<\/code><\/pre>\n
const<\/span> OtherComponent<\/span> =<\/span> React<\/span>.<\/span>lazy<\/span>(()<\/span> =><\/span> import<\/span>(<\/span>'<\/span>.\/OtherComponent<\/span>'<\/span>));<\/span>\r\n<\/code><\/pre>\n
\u5f53\u8be5\u7ec4\u4ef6\u9996\u6b21\u6e32\u67d3\u65f6\uff0c\u5b83\u4f1a\u81ea\u52a8\u52a0\u8f7d\u5305\u542bOtherComponent\u7684\u6346\u7ed1\u5305\u3002<\/p>\n
\u4e24\u79cd\u65b9\u6cd5\u7684\u4e3b\u8981\u5dee\u5f02\u662f\u4ec0\u4e48\uff1f<\/h3>\n
    \n
  • \n
      \u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30a4\u30f3\u30dd\u30fc\u30c8\u3092\u76f4\u63a5\u4f7f\u7528\u3059\u308b\u3084\u308a\u65b9<\/ul>\n<\/li>\n<\/ul>\n
      \u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u95a2\u6570\u304c\u76f4\u63a5\u547c\u3073\u51fa\u3055\u308c\u307e\u3059\u3002<\/p>\n
      React.lazy\u3092\u4f7f\u7528\u3059\u308b\u3084\u308a\u65b9<\/p>\n
      \u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30a4\u30f3\u30dd\u30fc\u30c8\u306fReact.lazy\u306b\u3088\u3063\u3066\u9593\u63a5\u7684\u306b\u4f7f\u7528\u3055\u308c\u3001\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30e2\u30b8\u30e5\u30fc\u30eb\u306fReact\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068\u3057\u3066\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3055\u308c\u307e\u3059\u3002<\/p>\n
      \u53e6\u5916\uff0c\u5982\u679c\u4f7f\u7528React.lazy\uff0c\u53ef\u4ee5\u4f7f\u7528Suspense\u7ec4\u4ef6\u6765\u63a7\u5236\u5f02\u6b65\u52a0\u8f7d\u7ec4\u4ef6\u7684\u52a0\u8f7d\u72b6\u6001\u3002\u6211\u4eec\u5c06\u5728\u4e0b\u4e00\u7ae0\u4e2d\u5bf9Suspense\u8fdb\u884c\u89e3\u91ca\u3002<\/p>\n
      \u60ac\u7591\u662f\u4ec0\u4e48\uff1f<\/h2>\n
      \u60ac\u7591\u7247\u7684\u6982\u8981<\/h3>\n
      \u901a\u8fc7\u4f7f\u7528React\u7684Suspense\uff0c\u53ef\u4ee5\u5728\u7ec4\u4ef6\u5185\u90e8\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\uff08\u4f8b\u5982\u6570\u636e\u83b7\u53d6\u6216\u4ee3\u7801\u62c6\u5206\uff09\u65f6\uff0c\u6709\u6548\u5730\u7ba1\u7406\u52a0\u8f7d\u72b6\u6001\u3002
      \nSuspense\u7ec4\u4ef6\u7684\u4e3b\u8981\u76ee\u7684\u662f\u5728\u5f02\u6b65\u64cd\u4f5c\u5b8c\u6210\u4e4b\u524d\u5ef6\u8fdf\u7279\u5b9a\u5185\u5bb9\uff08\u901a\u5e38\u662f\u7ec4\u4ef6\uff09\u7684\u52a0\u8f7d\u3002<\/p>\n
      \u4e0e\u56de\u9000UI\u7684\u914d\u5408<\/h3>\n
      \u60a8\u53ef\u4ee5\u4f7f\u7528fallback\u5c5e\u6027\u6307\u5b9afallback UI\u3002fallback UI\u662f\u5728\u5f02\u6b65\u64cd\u4f5c\u5c1a\u672a\u5b8c\u6210\u65f6\u663e\u793a\u7684\u7ec4\u4ef6\uff0c\u5982\u52a0\u8f7d\u6307\u793a\u5668\u6216\u52a0\u8f7d\u4fe1\u606f\u7b49\u3002\u5b83\u7528\u4e8e\u5411\u7528\u6237\u4f20\u8fbe\u64cd\u4f5c\u8fdb\u5ea6\u5e76\u660e\u786e\u8868\u793a\u6b63\u5728\u7b49\u5f85\u7684\u89d2\u8272\u3002<\/p>\n
      \u4f7f\u7528React.lazy\u548cSuspense\u7ed3\u5408\u5b9e\u73b0\u4ee3\u7801\u5206\u5272\u7684\u5b9e\u73b0\u3002<\/h2>\n
      \u5b9e\u9645\u7684\u4ee3\u7801\u5206\u5272\u793a\u4f8b<\/h3>\n
      import<\/span> React<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> MyComponent<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return<\/span> <<\/span>div<\/span>><\/span>My Component<\/<\/span>div<\/span>>;<\/span>\r\n};<\/span>\r\n\r\nexport<\/span> default<\/span> MyComponent<\/span>;<\/span>\r\n<\/code><\/pre>\n
      import<\/span> React<\/span>,<\/span> {<\/span> Suspense<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> MyComponent<\/span> =<\/span> React<\/span>.<\/span>lazy<\/span>(()<\/span> =><\/span> import<\/span>(<\/span>'<\/span>.\/MyComponent<\/span>'<\/span>));<\/span>\r\n\r\nconst<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return <\/span>(<\/span>\r\n    <<\/span>div<\/span>><\/span>\r\n      <<\/span>Suspense<\/span> fallback<\/span>=<\/span>{<\/span><<\/span>div<\/span>><\/span>Loading...<\/<\/span>div<\/span>><\/span>}<\/span>><\/span>\r\n        <<\/span>MyComponent<\/span> \/><\/span>\r\n      <\/<\/span>Suspense<\/span>><\/span>\r\n    <\/<\/span>div<\/span>><\/span>\r\n  );<\/span>\r\n};<\/span>\r\n\r\nexport<\/span> default<\/span> App<\/span>;<\/span>\r\n<\/code><\/pre>\n
      \u9519\u8bef\u5904\u7406\u7684\u5b9e\u73b0<\/h2>\n
      \u4f7f\u7528\u9519\u8bef\u8fb9\u754c(Error Boundaries)\u3002<\/h3>\n
      \u4f7f\u7528Suspense\u548cReact.lazy\u8fdb\u884c\u4ee3\u7801\u5206\u5272\u65f6\uff0c\u9519\u8bef\u5904\u7406\u8d77\u7740\u975e\u5e38\u91cd\u8981\u7684\u4f5c\u7528\u3002\u7279\u522b\u662f\u5f53\u52a8\u6001\u52a0\u8f7d\u7684\u7ec4\u4ef6\u51fa\u73b0\u9519\u8bef\u6216\u7531\u4e8e\u7f51\u7edc\u9519\u8bef\u7b49\u539f\u56e0\u5bfc\u81f4\u7ec4\u4ef6\u52a0\u8f7d\u5931\u8d25\u65f6\uff0c\u9700\u8981\u8fdb\u884c\u9002\u5f53\u7684\u9519\u8bef\u5904\u7406\u3002<\/p>\n
      \u672c\u6b21\u6211\u4eec\u5c06\u4ecb\u7ecd\u4f5c\u4e3a\u9519\u8bef\u5904\u7406\u6280\u672f\u7684\u9519\u8bef\u8fb9\u754c\u3002\u9519\u8bef\u8fb9\u754c\u4f1a\u6355\u6349\u5b50\u7ec4\u4ef6\u6811\u4e2d\u53d1\u751f\u7684\u9519\u8bef\uff0c\u5e76\u5c06\u5176\u8bb0\u5f55\u5728\u65e5\u5fd7\u4e2d\uff0c\u8d77\u5230\u4ee3\u66ff\u5d29\u6e83\u7ec4\u4ef6\u6811\u663e\u793a\u56de\u9000\u754c\u9762\u7684\u4f5c\u7528\u3002<\/p>\n
      class<\/span> ErrorBoundary<\/span> extends<\/span> React<\/span>.<\/span>Component<\/span> {<\/span>\r\n  constructor<\/span>(<\/span>props<\/span>)<\/span> {<\/span>\r\n    super<\/span>(<\/span>props<\/span>);<\/span>\r\n    this<\/span>.<\/span>state<\/span> =<\/span> {<\/span> hasError<\/span>:<\/span> false<\/span> };<\/span>\r\n  }<\/span>\r\n\r\n  static<\/span> getDerivedStateFromError<\/span>(<\/span>error<\/span>)<\/span> {<\/span>\r\n  \/\/ \u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u3089\u3001state\u3092\u66f4\u65b0\u3057\u3066\u6b21\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3067\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30afUI\u3092\u8868\u793a\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/span>\r\n    return<\/span> {<\/span> hasError<\/span>:<\/span> true<\/span> };<\/span>\r\n  }<\/span>\r\n\r\n  componentDidCatch<\/span>(<\/span>error<\/span>,<\/span> errorInfo<\/span>)<\/span> {<\/span>\r\n    \/\/ \u3053\u3053\u3067\u30a8\u30e9\u30fc\u60c5\u5831\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/span>\r\n    console<\/span>.<\/span>error<\/span>(<\/span>\"<\/span>An error occurred:<\/span>\"<\/span>,<\/span> error<\/span>,<\/span> errorInfo<\/span>);<\/span>\r\n    \/\/ \u3053\u3053\u306b\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30ed\u30ae\u30f3\u30b0\u30b5\u30fc\u30d3\u30b9\u3078\u306e\u5831\u544a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001Sentry.captureException(error);<\/span>\r\n  }<\/span>\r\n\r\n  render<\/span>()<\/span> {<\/span>\r\n    if <\/span>(<\/span>this<\/span>.<\/span>state<\/span>.<\/span>hasError<\/span>)<\/span> {<\/span>\r\n    \/\/ \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001\u3053\u3053\u3067\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30afUI\u3092\u63cf\u753b\u3067\u304d\u307e\u3059\u3002<\/span>\r\n      return<\/span> <<\/span>h1<\/span>><\/span>Something went wrong.<\/<\/span>h1<\/span>>;<\/span>\r\n    }<\/span>\r\n\r\n    return<\/span> this<\/span>.<\/span>props<\/span>.<\/span>children<\/span>;<\/span> \r\n  }<\/span>\r\n}<\/span>\r\n\r\nexport<\/span> default<\/span> ErrorBoundary<\/span>;<\/span>\r\n<\/code><\/pre>\n
      import<\/span> React<\/span>,<\/span> {<\/span> Suspense<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\nimport<\/span> ErrorBoundary<\/span> from<\/span> '<\/span>.\/ErrorBoundary<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> MyComponent<\/span> =<\/span> React<\/span>.<\/span>lazy<\/span>(()<\/span> =><\/span> import<\/span>(<\/span>'<\/span>.\/MyComponent<\/span>'<\/span>));<\/span>\r\n\r\nconst<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return <\/span>(<\/span>\r\n    <<\/span>div<\/span>><\/span>\r\n      <<\/span>ErrorBoundary<\/span>><\/span>\r\n        <<\/span>Suspense<\/span> fallback<\/span>=<\/span>{<\/span><<\/span>div<\/span>><\/span>Loading...<\/<\/span>div<\/span>><\/span>}<\/span>><\/span>\r\n          <<\/span>MyComponent<\/span> \/><\/span>\r\n        <\/<\/span>Suspense<\/span>><\/span>\r\n      <\/<\/span>ErrorBoundary<\/span>><\/span>\r\n    <\/<\/span>div<\/span>><\/span>\r\n  );<\/span>\r\n};<\/span>\r\n\r\nexport<\/span> default<\/span> App<\/span>;<\/span>\r\n<\/code><\/pre>\n
      \u603b\u7ed3<\/h2>\n
      \u4f5c\u4e3a\u4f18\u5316\u6027\u80fd\u7684\u4e00\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u64b0\u5199\u4e86\u4e00\u7bc7\u540d\u4e3a\u201c\u4f7f\u7528Suspense\u548cReact.lazy\u8fdb\u884c\u6027\u80fd\u4f18\u5316\u201d\u7684\u6587\u7ae0\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u6613\u7528\uff0c\u5e76\u4e14\u4e0d\u4f1a\u7834\u574f\u7ec4\u4ef6\u672c\u8eab\uff0c\u5efa\u8bae\u60a8\u53c2\u8003\u4e00\u4e0b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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