{"id":37976,"date":"2023-10-05T06:12:07","date_gmt":"2023-11-21T10:13:13","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90react%e3%80%91%e9%80%9a%e8%bf%87%e5%8a%a8%e6%80%81%e5%8a%a0%e8%bd%bd%e7%bb%84%e4%bb%b6\/"},"modified":"2024-01-15T09:47:16","modified_gmt":"2024-01-15T01:47:16","slug":"%e3%80%90react%e3%80%91%e9%80%9a%e8%bf%87%e5%8a%a8%e6%80%81%e5%8a%a0%e8%bd%bd%e7%bb%84%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90react%e3%80%91%e9%80%9a%e8%bf%87%e5%8a%a8%e6%80%81%e5%8a%a0%e8%bd%bd%e7%bb%84%e4%bb%b6\/","title":{"rendered":"\u3010React\u3011\u901a\u8fc7\u52a8\u6001\u52a0\u8f7d\u7ec4\u4ef6"},"content":{"rendered":"<h1>\u4f7f\u7528React.lazy()\u6765\u52a8\u6001\u52a0\u8f7d\u7ec4\u4ef6\u3002<\/h1>\n<p>React.lazy()\u662f\u5728React 16.6.0\u7248\u672c\u5f15\u5165\u7684\u4e00\u4e2a\u529f\u80fd\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u4fbf\u7684\u65b9\u5f0f\u6765\u52a8\u6001\u52a0\u8f7d\u7ec4\u4ef6\u3002\u901a\u8fc7\u4f7f\u7528\u5b83\uff0c\u6211\u4eec\u53ef\u4ee5\u4f18\u5316\u5e94\u7528\u7684\u521d\u59cb\u52a0\u8f7d\u65f6\u95f4\uff0c\u5e76\u4e14\u53ea\u5728\u9700\u8981\u65f6\u52a0\u8f7d\u6240\u9700\u7684\u7ec4\u4ef6\u3002<\/p>\n<h2>1. React.lazy()\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>React.lazy()\u662f\u4e00\u4e2a\u652f\u6301\u52a8\u6001\u5bfc\u5165\u7684\u51fd\u6570\uff0c\u7528\u4e8e\u751f\u6210\u53ef\u4ee5\u8fdb\u884c\u5ef6\u8fdf\u52a0\u8f7d\u7684\u7ec4\u4ef6\u3002\u901a\u5e38\uff0c\u7ec4\u4ef6\u4f1a\u4f7f\u7528import\u8bed\u53e5\u8fdb\u884c\u76f4\u63a5\u52a0\u8f7d\uff0c\u4f46\u4f7f\u7528React.lazy()\u540e\uff0c\u8be5\u7ec4\u4ef6\u5c06\u5e94\u7528\u4ee3\u7801\u5206\u5272\uff08code-splitting\uff09\uff0c\u5e76\u5728\u9700\u8981\u65f6\u4ee5\u5f02\u6b65\u65b9\u5f0f\u8fdb\u884c\u52a0\u8f7d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">MyComponent<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">lazy<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"k\">import<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">.\/MyComponent<\/span><span class=\"dl\">'<\/span><span class=\"p\">));<\/span>\r\n<\/code><\/pre>\n<h2>2. React.lazy()\u7684\u57fa\u672c\u7528\u6cd5<\/h2>\n<p>\u4ee5\u4e0b\u662fReact.lazy()\u7684\u57fa\u672c\u4f7f\u7528\u65b9\u5f0f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"nx\">React<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">react<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">MyComponent<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>Hello, React!<span class=\"p\">&lt;\/<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;;<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"nx\">MyComponent<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">.\/App.css<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nx\">React<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">lazy<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Suspense<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">react<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">MyComponent<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">lazy<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"k\">import<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">.\/components\/MyComponent<\/span><span class=\"dl\">\"<\/span><span class=\"p\">));<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">App<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n    <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span> <span class=\"na\">className<\/span><span class=\"p\">=<\/span><span class=\"s\">\"App\"<\/span><span class=\"p\">&gt;<\/span>\r\n      <span class=\"p\">&lt;<\/span><span class=\"nc\">Suspense<\/span> <span class=\"na\">fallback<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>Loading...<span class=\"p\">&lt;\/<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">MyComponent<\/span> <span class=\"p\">\/&gt;<\/span>\r\n      <span class=\"p\">&lt;\/<\/span><span class=\"nc\">Suspense<\/span><span class=\"p\">&gt;<\/span>\r\n    <span class=\"p\">&lt;\/<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\r\n  <span class=\"p\">);<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"nx\">App<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0c\u4f7f\u7528React.lazy()\u52a8\u6001\u52a0\u8f7d\u4e86MyComponent\u7ec4\u4ef6\u3002Suspense\u7ec4\u4ef6\u6307\u5b9a\u4e86\u5728\u5ef6\u8fdf\u52a0\u8f7d\u671f\u95f4\u663e\u793a\u7684\u52a0\u8f7d\u63d0\u793a\u4fe1\u606f\u3002<\/p>\n<h2>3. \u901a\u8fc7\u60ac\u5ff5\u5904\u7406\u9519\u8bef<\/h2>\n<p>Suspense\u4e0d\u4ec5\u7528\u4e8e\u5904\u7406\u5f02\u6b65\u7ec4\u4ef6\u52a0\u8f7d\u65f6\u7684\u52a0\u8f7d\u52a8\u753b\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5904\u7406\u9519\u8bef\u3002\u5982\u679c\u5728\u5f02\u6b65\u7ec4\u4ef6\u52a0\u8f7d\u671f\u95f4\u51fa\u73b0\u9519\u8bef\uff0cSuspense\u4f1a\u663e\u793a\u9519\u8bef\u7ec4\u4ef6\uff0c\u4f8b\u5982\uff0c\u800c\u4e0d\u662f\u663e\u793a\u6307\u5b9a\u5728fallback\u5c5e\u6027\u4e2d\u7684\u52a0\u8f7d\u4fe1\u606f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">.\/App.css<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"nx\">React<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">lazy<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Suspense<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">react<\/span><span class=\"dl\">\"<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">MyComponent<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">lazy<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"k\">import<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">.\/components\/MyComponent<\/span><span class=\"dl\">\"<\/span><span class=\"p\">));<\/span>\r\n\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">ErrorBoundary<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">React<\/span><span class=\"p\">.<\/span><span class=\"nx\">Component<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nf\">constructor<\/span><span class=\"p\">(<\/span><span class=\"nx\">props<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">super<\/span><span class=\"p\">(<\/span><span class=\"nx\">props<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">state<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">hasError<\/span><span class=\"p\">:<\/span> <span class=\"kc\">false<\/span> <span class=\"p\">};<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"kd\">static<\/span> <span class=\"nf\">getDerivedStateFromError<\/span><span class=\"p\">(<\/span><span class=\"nx\">_<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">hasError<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span> <span class=\"p\">};<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nf\">render<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">state<\/span><span class=\"p\">.<\/span><span class=\"nx\">hasError<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">props<\/span><span class=\"p\">.<\/span><span class=\"nx\">fallback<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">props<\/span><span class=\"p\">.<\/span><span class=\"nx\">children<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">App<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n    <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span> <span class=\"na\">className<\/span><span class=\"p\">=<\/span><span class=\"s\">\"App\"<\/span><span class=\"p\">&gt;<\/span>\r\n      <span class=\"p\">&lt;<\/span><span class=\"nc\">Suspense<\/span> <span class=\"na\">fallback<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>Loading...<span class=\"p\">&lt;\/<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>\r\n        <span class=\"p\">&lt;<\/span><span class=\"nc\">ErrorBoundary<\/span> <span class=\"na\">fallback<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">&lt;<\/span><span class=\"nt\">h2<\/span><span class=\"p\">&gt;<\/span>Error!!!!<span class=\"p\">&lt;\/<\/span><span class=\"nt\">h2<\/span><span class=\"p\">&gt;<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>\r\n          <span class=\"p\">&lt;<\/span><span class=\"nc\">MyComponent<\/span> <span class=\"p\">\/&gt;<\/span>\r\n        <span class=\"p\">&lt;\/<\/span><span class=\"nc\">ErrorBoundary<\/span><span class=\"p\">&gt;<\/span>\r\n      <span class=\"p\">&lt;\/<\/span><span class=\"nc\">Suspense<\/span><span class=\"p\">&gt;<\/span>\r\n    <span class=\"p\">&lt;\/<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\r\n  <span class=\"p\">);<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"nx\">App<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<h2>4. \u603b\u7ed3<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528React.lazy()\uff0c\u60a8\u53ef\u4ee5\u4f18\u5316\u5e94\u7528\u7a0b\u5e8f\u7684\u521d\u59cb\u52a0\u8f7d\u65f6\u95f4\uff0c\u5e76\u5f02\u6b65\u52a0\u8f7d\u4ec5\u5728\u9700\u8981\u65f6\u624d\u9700\u8981\u7684\u7ec4\u4ef6\u3002\u60a8\u8fd8\u53ef\u4ee5\u4f7f\u7528Suspense\u8f7b\u677e\u5730\u7ec4\u5408\u52a0\u8f7d\u548c\u9519\u8bef\u5904\u7406\u3002<\/p>\n<p>\u8fd9\u7bc7\u6587\u7ae0\u662f\u4e3a\u521d\u5b66\u8005\u5927\u5b66\u751f\u51c6\u5907\u7684\u5173\u4e8e\u7406\u89e3React Next\u7684\u8f93\u51fa\u6750\u6599\u3002\u671f\u5f85\u5927\u5bb6\u63d0\u51fa\u9519\u8bef\u548c\u610f\u89c1\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528React.lazy()\u6765\u52a8\u6001\u52a0\u8f7d\u7ec4\u4ef6\u3002 React.lazy()\u662f\u5728React 16.6.0\u7248\u672c\u5f15\u5165\u7684\u4e00 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-37976","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010React\u3011\u901a\u8fc7\u52a8\u6001\u52a0\u8f7d\u7ec4\u4ef6 - 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\/\u3010react\u3011\u901a\u8fc7\u52a8\u6001\u52a0\u8f7d\u7ec4\u4ef6\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010React\u3011\u901a\u8fc7\u52a8\u6001\u52a0\u8f7d\u7ec4\u4ef6\" \/>\n<meta property=\"og:description\" content=\"\u4f7f\u7528React.lazy()\u6765\u52a8\u6001\u52a0\u8f7d\u7ec4\u4ef6\u3002 React.lazy()\u662f\u5728React 16.6.0\u7248\u672c\u5f15\u5165\u7684\u4e00 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010react\u3011\u901a\u8fc7\u52a8\u6001\u52a0\u8f7d\u7ec4\u4ef6\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-11-21T10:13:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-01-15T01:47:16+00:00\" \/>\n<meta name=\"author\" content=\"\u6e05, \u626c\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6e05, \u626c\" \/>\n\t<meta name=\"twitter:label2\" 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