\u5728\u73b0\u4ee3\u524d\u7aef\u5e94\u7528\u4e2d\uff0c\u52a0\u8f7d\u4f53\u9a8c\u81f3\u5173\u91cd\u8981\u3002\u4f20\u7edf\u7684 Suspense \u662f React \u5185\u7f6e\u7ec4\u4ef6\uff0c\u7528\u4e8e\u201c\u7b49\u5f85\u201d\u67d0\u4e9b\u5f02\u6b65\u64cd\u4f5c\uff08\u5982\u4ee3\u7801\u52a0\u8f7d\u3001\u6570\u636e\u83b7\u53d6\uff09\u5b8c\u6210\uff0c\u5e76\u5728\u6b64\u671f\u95f4\u663e\u793a fallback \u5185\u5bb9\u3002\u5176\u6838\u5fc3\u601d\u60f3\u662f\uff1a\u8ba9\u7ec4\u4ef6\u58f0\u660e\u5176\u4f9d\u8d56\u7684\u5f02\u6b65\u8d44\u6e90\uff0c\u7531 React \u534f\u8c03\u52a0\u8f7d\u72b6\u6001<\/strong>\u3002<\/p>\n \u95ee\u9898\uff1a<\/p>\n \u8fd9\u662f Suspense \u6700\u57fa\u7840\u7684\u7528\u6cd5\uff1a\u6309\u9700\u52a0\u8f7d\u7ec4\u4ef6\uff0c\u51cf\u5c11\u9996\u5c4f\u4f53\u79ef\u3002<\/p>\n \u6ce8\u610f<\/strong>\uff1a \u61d2\u52a0\u8f7d\u53ef\u80fd\u56e0\u7f51\u7edc\u5931\u8d25\u800c\u62a5\u9519\uff0c\u9700\u8981\u914d\u5408\u9519\u8bef\u8fb9\u754c\u4f7f\u7528\u3002<\/p>\n React Query \u7b49\u5e93\u652f\u6301 Suspense \u6a21\u5f0f\uff0c\u53ef\u4ee5\u4f18\u96c5\u5730\u5904\u7406\u6570\u636e\u52a0\u8f7d\u3002<\/p>\n \u4f18\u52bf<\/strong>\uff1a<\/p>\n \u5f53\u9875\u9762\u6709\u591a\u4e2a\u5f02\u6b65\u533a\u57df\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5d4c\u5957 Suspense \u5b9e\u73b0\u7ec6\u7c92\u5ea6\u52a0\u8f7d\u3002<\/p>\n \u6ce8\u610f<\/strong>\uff1aSuspense \u7684\u8fb9\u754c\u4f1a\u201c\u5192\u6ce1\u201d\uff0c\u5982\u679c\u5b50 Suspense \u6ca1\u6709\u6355\u83b7\u5230\u5f02\u6b65\u64cd\u4f5c\uff0c\u4f1a\u5411\u4e0a\u5bfb\u627e\u6700\u8fd1\u7684 Suspense\u3002<\/p>\n \u5728\u5207\u6362\u8def\u7531\u6216\u6570\u636e\u65f6\uff0c\u5982\u679c\u65b0\u5185\u5bb9\u5f88\u5feb\u52a0\u8f7d\u5b8c\u6210\uff0c\u76f4\u63a5\u663e\u793a fallback \u4f1a\u9020\u6210\u95ea\u70c1\u3002React 18 \u63d0\u4f9b\u4e86 \u539f\u7406<\/strong>\uff1a \u539f\u56e0<\/strong>\uff1aSuspense \u7684 key \u4e0d\u53d8\uff0c\u4f46\u6bcf\u6b21\u91cd\u6e32\u67d3\u90fd\u4f1a\u91cd\u65b0\u521b\u5efa fallback\u3002\u5e94\u786e\u4fdd Suspense \u7684\u5c42\u7ea7\u7a33\u5b9a\u3002<\/p>\n Suspense \u53ea\u80fd\u6355\u83b7\u5728\u6e32\u67d3\u671f\u95f4\u629b\u51fa\u7684 Promise\uff08\u5982 \u8fc7\u5ea6\u4f7f\u7528 Suspense \u4f1a\u5bfc\u81f4\u5927\u91cf fallback \u95ea\u70c1\uff0c\u5efa\u8bae\u5728\u9875\u9762\u7ea7\u522b\u6216\u529f\u80fd\u6a21\u5757\u7ea7\u522b\u4f7f\u7528\u3002<\/p>\n \u901a\u8fc7\u672c\u6587\u7684\u4e09\u4e2a\u5b9e\u6218\uff0c\u4f60\u5df2\u7ecf\u5b66\u4f1a\u4e86\uff1a<\/p>\n Suspense \u7684\u672a\u6765\u8fd8\u5305\u62ec Server Components \u548c Streaming\uff0c\u503c\u5f97\u6301\u7eed\u5173\u6ce8\u3002<\/p>\n \u672c\u6587\u6df1\u5165\u8bb2\u89e3 React Suspense \u7684\u539f\u7406\u4e0e\u4f7f\u7528\uff0c\u901a\u8fc7\u4e09\u4e2a\u5b9e\u6218\u6848\u4f8b\uff08\u61d2\u52a0\u8f7d\u7ec4\u4ef6\u3001\u6570\u636e\u83b7\u53d6\u3001\u5d4c\u5957 Suspense\uff09\u5c55\u793a\u5982\u4f55\u4f18\u96c5\u5730\u5904\u7406\u52a0\u8f7d\u72b6\u6001\uff0c\u907f\u514d\u4f20\u7edf loading \u95ea\u70c1\u95ee\u9898\uff0c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[11,18,17,6,19],"class_list":["post-14","post","type-post","status-publish","format-standard","hentry","category-3","tag-react","tag-react-query","tag-suspense","tag-6","tag-19"],"_links":{"self":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/posts\/14","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=14"}],"version-history":[{"count":0,"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/posts\/14\/revisions"}],"wp:attachment":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}loading<\/code> \u72b6\u6001\u7ba1\u7406\u5f80\u5f80\u4f1a\u5bfc\u81f4\u4ee3\u7801\u5206\u6563\u3001\u95ea\u70c1\u7b49\u95ee\u9898\u3002React 18 \u5f15\u5165\u7684 Suspense \u7ec4\u4ef6\u63d0\u4f9b\u4e86\u4e00\u79cd\u58f0\u660e\u5f0f\u3001\u53ef\u7ec4\u5408\u7684\u89e3\u51b3\u65b9\u6848\u3002\u672c\u6587\u5c06\u5e26\u4f60\u4ece\u96f6\u5f00\u59cb\uff0c\u901a\u8fc7\u4e09\u4e2a\u5b9e\u6218\u6848\u4f8b\uff0c\u638c\u63e1 Suspense \u7684\u6838\u5fc3\u7528\u6cd5\u548c\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n\u4ec0\u4e48\u662f Suspense\uff1f<\/h2>\n
\u4f20\u7edf\u65b9\u5f0f\u7684\u75db\u70b9<\/h3>\n
\n\/\/ \u4f20\u7edf\u65b9\u5f0f\uff1a\u624b\u52a8\u7ba1\u7406 loading\nfunction UserProfile({ userId }) {\n const [user, setUser] = useState(null);\n const [loading, setLoading] = useState(true);\n\n useEffect(() => {\n setLoading(true);\n fetchUser(userId).then(data => {\n setUser(data);\n setLoading(false);\n });\n }, [userId]);\n\n if (loading) return <Spinner \/>;\n return <div>{user.name}<\/div>;\n}\n<\/code><\/pre>\n\n
\u5b9e\u6218\u4e00\uff1a\u61d2\u52a0\u8f7d\u7ec4\u4ef6\uff08React.lazy + Suspense\uff09<\/h2>\n
\nimport React, { Suspense } from 'react';\n\nconst HeavyComponent = React.lazy(() => import('.\/HeavyComponent'));\n\nfunction App() {\n return (\n <div>\n <h1>My App<\/h1>\n <Suspense fallback={<div>Loading component...<\/div>}>\n <HeavyComponent \/>\n <\/Suspense>\n <\/div>\n );\n}\n<\/code><\/pre>\nReact.lazy<\/code> \u53ea\u652f\u6301\u9ed8\u8ba4\u5bfc\u51fa\u3002\u5982\u679c\u7ec4\u4ef6\u9700\u8981\u547d\u540d\u5bfc\u51fa\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u4e2d\u95f4\u6a21\u5757\u3002<\/p>\n\u8fdb\u9636\uff1a\u9519\u8bef\u8fb9\u754c<\/h3>\n
\nimport React from 'react';\n\nclass ErrorBoundary extends React.Component {\n state = { hasError: false };\n\n static getDerivedStateFromError() {\n return { hasError: true };\n }\n\n render() {\n if (this.state.hasError) {\n return <div>Something went wrong.<\/div>;\n }\n return this.props.children;\n }\n}\n\n\/\/ \u4f7f\u7528\n<ErrorBoundary>\n <Suspense fallback={<div>Loading...<\/div>}>\n <HeavyComponent \/>\n <\/Suspense>\n<\/ErrorBoundary>\n<\/code><\/pre>\n\u5b9e\u6218\u4e8c\uff1a\u4f7f\u7528 Suspense \u83b7\u53d6\u6570\u636e\uff08React-Query\uff09<\/h2>\n
\u5b89\u88c5\u4f9d\u8d56<\/h3>\n
\nnpm install @tanstack\/react-query\n<\/code><\/pre>\n\u914d\u7f6e QueryClient \u542f\u7528 Suspense<\/h3>\n
\nimport { QueryClient, QueryClientProvider, useSuspenseQuery } from '@tanstack\/react-query';\n\nconst queryClient = new QueryClient({\n defaultOptions: {\n queries: {\n suspense: true, \/\/ \u5168\u5c40\u542f\u7528 Suspense \u6a21\u5f0f\n },\n },\n});\n<\/code><\/pre>\n\u4f7f\u7528 useSuspenseQuery<\/h3>\n
\nfunction UserProfile({ userId }) {\n const { data: user } = useSuspenseQuery({\n queryKey: ['user', userId],\n queryFn: () => fetch(`\/api\/users\/${userId}`).then(res => res.json()),\n });\n\n return <div>{user.name}<\/div>;\n}\n\n\/\/ \u7236\u7ec4\u4ef6\nfunction App() {\n return (\n <QueryClientProvider client={queryClient}>\n <Suspense fallback={<div>Loading user...<\/div>}>\n <UserProfile userId={1} \/>\n <\/Suspense>\n <\/QueryClientProvider>\n );\n}\n<\/code><\/pre>\n\n
\u5b9e\u6218\u4e09\uff1a\u5d4c\u5957 Suspense \u4e0e\u8fc7\u6e21\u6548\u679c<\/h2>\n
\nimport { Suspense } from 'react';\n\nfunction Page() {\n return (\n <div>\n <h1>Dashboard<\/h1>\n <Suspense fallback={<div>Loading header...<\/div>}>\n <Header \/>\n <Suspense fallback={<div>Loading main content...<\/div>}>\n <MainContent \/>\n <Suspense fallback={<div>Loading footer...<\/div>}>\n <Footer \/>\n <\/Suspense>\n <\/Suspense>\n <\/Suspense>\n <\/div>\n );\n}\n<\/code><\/pre>\n\u4f7f\u7528 startTransition \u907f\u514d\u95ea\u70c1<\/h3>\n
startTransition<\/code> \u6765\u5ef6\u8fdf fallback \u7684\u663e\u793a\u3002<\/p>\n\nimport { useTransition, useState } from 'react';\n\nfunction App() {\n const [tab, setTab] = useState('home');\n const [isPending, startTransition] = useTransition();\n\n function switchTab(newTab) {\n startTransition(() => {\n setTab(newTab);\n });\n }\n\n return (\n <div>\n <button onClick={() => switchTab('home')}>Home<\/button>\n <button onClick={() => switchTab('about')}>About<\/button>\n <Suspense fallback={<div>Loading...<\/div>}>\n {tab === 'home' ? <Home \/> : <About \/>}\n <\/Suspense>\n <\/div>\n );\n}\n<\/code><\/pre>\nstartTransition<\/code> \u6807\u8bb0\u7684\u66f4\u65b0\u88ab\u89c6\u4e3a\u201c\u975e\u7d27\u6025\u201d\uff0cReact \u4f1a\u5ef6\u8fdf\u663e\u793a fallback \u76f4\u5230\u8d85\u65f6\uff08\u9ed8\u8ba4 5 \u79d2\uff09\uff0c\u5982\u679c\u5728\u6b64\u671f\u95f4\u66f4\u65b0\u5b8c\u6210\uff0c\u5219\u76f4\u63a5\u663e\u793a\u65b0\u5185\u5bb9\uff0c\u907f\u514d\u95ea\u70c1\u3002<\/p>\n\u5e38\u89c1\u5751\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h2>\n
1. \u4e0d\u8981\u5c06 Suspense \u653e\u5728\u9891\u7e41\u53d8\u5316\u7684\u7236\u7ec4\u4ef6\u4e2d<\/h3>\n
\n\/\/ \u274c \u9519\u8bef\uff1a\u6bcf\u6b21 count \u53d8\u5316\u90fd\u4f1a\u91cd\u65b0\u6302\u8f7d Suspense\nfunction Counter() {\n const [count, setCount] = useState(0);\n return (\n <div>\n <button onClick={() => setCount(c => c + 1)}>{count}<\/button>\n <Suspense fallback={<div>Loading...<\/div>}>\n <SlowComponent \/>\n <\/Suspense>\n <\/div>\n );\n}\n<\/code><\/pre>\n2. \u907f\u514d\u5728 Suspense \u5185\u90e8\u4f7f\u7528 useEffect \u52a0\u8f7d\u6570\u636e<\/h3>\n
\n\/\/ \u274c \u9519\u8bef\uff1aSuspense \u65e0\u6cd5\u6355\u83b7 useEffect \u4e2d\u7684\u5f02\u6b65\u64cd\u4f5c\nfunction BadComponent() {\n useEffect(() => {\n fetchData().then(data => setData(data));\n }, []);\n return <div>{data}<\/div>;\n}\n<\/code><\/pre>\nuseSuspenseQuery<\/code> \u6216 React.lazy<\/code>\uff09\u3002<\/p>\n3. \u5408\u7406\u8bbe\u7f6e fallback \u7684\u7c92\u5ea6<\/h3>\n
\u603b\u7ed3<\/h2>\n
\n
React.lazy<\/code> \u548c Suspense \u8fdb\u884c\u4ee3\u7801\u5206\u5272<\/li>\nstartTransition<\/code> \u907f\u514d\u95ea\u70c1<\/li>\n<\/ul>\n\u5ef6\u4f38\u9605\u8bfb<\/h2>\n
\n