{"id":2105,"date":"2022-07-29T09:54:05","date_gmt":"2022-07-29T00:54:05","guid":{"rendered":"http:\/\/www.agile-software.site\/?p=2105"},"modified":"2022-11-06T15:49:34","modified_gmt":"2022-11-06T06:49:34","slug":"react-query","status":"publish","type":"post","link":"https:\/\/agile-software.net\/?p=2105","title":{"rendered":"React Query"},"content":{"rendered":"\n

\u30b5\u30fc\u30d0\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u969b\u306b\u3059\u3050\u306b\u601d\u3044\u3064\u304f\u306e\u306ffetch\u95a2\u6570\u3084axios\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n\n\n

React Query\u306fReact\u306eData Fetching\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u30b5\u30fc\u30d0\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u969b\u306b\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u3060\u3051\u306a\u3089fetch\u95a2\u6570\u3068axios\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3067\u304d\u308b\u306e\u3067React Query\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u306ffetch\u95a2\u6570\u3068axios\u304c\u6301\u3063\u3066\u3044\u306a\u3044\u6a5f\u80fd\u304c\u4f55\u304b\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

React Query\u306e\u6a5f\u80fd\u306b\u3064\u3044\u3066\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3046\u524d\u306bReact Query\u3092\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002\u8aac\u660e\u3067\u306f\u201dReact Query makes fetching, caching, synchronizing and updating server state in React App a breeze\u201d\u3068\u8a18\u8f09\u3055\u308c\u3066\u304a\u308a\u3001\u30b5\u30fc\u30d0\u304b\u3089\u30c7\u30fc\u30bf\u53d6\u5f97\u3060\u3051\u3067\u306f\u306a\u304f\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u6a5f\u80fd\u3001\u30b5\u30fc\u30d0\u4e0a\u306e\u30c7\u30fc\u30bf\u3068\u540c\u671f\u3059\u308b\u6a5f\u80fd\u304c\u3042\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u672c\u6587\u66f8\u3067\u306fReact\u74b0\u5883\u3092\u69cb\u7bc9\u3057React Query\u304c\u5b9f\u969b\u306b\u3069\u306e\u3088\u3046\u306a\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u308b\u306e\u304b\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3059\u3002useState, useEffect\u306e\u4f7f\u3044\u65b9\u3092\u77e5\u3063\u3066\u3044\u308b\u3060\u3051\u306eReact\u306e\u30d3\u30ae\u30ca\u30fc\u30ec\u30d9\u30eb\u306e\u4eba\u3067\u3082\u7406\u89e3\u3067\u304d\u3088\u3046\u306b\u3067\u304d\u308b\u3060\u3051\u7c21\u5358\u306a\u4f8b\u3092\u5229\u7528\u3057\u3066\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

React\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210<\/h2>\n\n\n\n

useQuery\u306e\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3046\u305f\u3081\u306bReact\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u3092\u884c\u3044\u307e\u3059\u3002npx crearte-react-app\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u540d\u524d\u306b\u306f\u4efb\u610f\u306e\u540d\u524d\u3092\u3064\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n

\n % npx create-react-app react-userquery-test\n<\/code><\/pre>\n\n\n\n
React\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u5f8c\u3001useQuery\u3092\u5229\u7528\u3057\u306a\u3044\u901a\u5e38\u306e\u65b9\u6cd5\u3067\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\u306e\u65b9\u6cd5\u78ba\u8a8d\u3057\u3001\u305d\u306e\u5f8cuseQuery\u3092\u5229\u7528\u3057\u305f\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u65b9\u6cd5\u3092\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
useQuery\u306e\u5229\u7528\u3057\u306a\u3044\u5834\u5408<\/h2>\n\n\n\n
User\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u4f5c\u6210<\/h3>\n\n\n\n
src\u30d5\u30a9\u30eb\u30c0\u306bcomponents\u30d5\u30a9\u30eb\u30c0\u3092\u4f5c\u6210\u3057\u305d\u306e\u4e0b\u306bUser.js\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
fetch\u95a2\u6570\u3092\u5229\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u307e\u3059\u304c\u3001\u305d\u306e\u305f\u3081\u306b\u306f\u5916\u90e8\u306b\u30c7\u30fc\u30bf\u30ea\u30bd\u30fc\u30b9\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306fJSONPlaceholder<\/a>\u3092\u5229\u7528\u3055\u305b\u3066\u3082\u3089\u3044\u307e\u3059\u3002\u4e0b\u8a18\u306eURL\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306810\u540d\u5206\u306e\u30e6\u30fc\u30b6\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u304b\u3089\u3082\u53d6\u5f97\u304c\u53ef\u80fd\u306a\u306e\u3067\u30d6\u30e9\u30a6\u30b6\u304b\u3089\u76f4\u63a5URL\u306b\u30a2\u30af\u30bb\u30b9\u3092\u884c\u3044\u3069\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf\u304c\u53d6\u5f97\u3067\u304d\u308b\u304b\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
\nhttps://jsonplaceholder.typicode.com\/users\n<\/code><\/pre>\n\n\n\n
User.js\u30d5\u30a1\u30a4\u30eb\u3067\u306fReact Hook\u306euseEffect\u3092\u5229\u7528\u3057\u3066\u30de\u30a6\u30f3\u30c8\u6642\u306bfetch\u95a2\u6570\u3092\u5b9f\u884c\u3057JSONPlaceholider\u304b\u3089\u30e6\u30fc\u30b6\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3001\u53d6\u5f97\u5f8c\u306fReact Hook\u306euseState\u3092\u5229\u7528\u3057\u3066\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u306fmap\u95a2\u6570\u3067\u5c55\u958b\u3092\u884c\u3044\u30e6\u30fc\u30b6\u4e00\u89a7\u3092\u30d6\u30e9\u30a6\u30b6\u4e0a\u306b\u8868\u793a\u3055\u305b\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\nimport { useState, useEffect } from 'react';\n\nconst fetchUsers = async () => {\n  const res = await fetch('https:\/\/jsonplaceholder.typicode.com\/users');\n  return res.json();\n};\n\nfunction User() {\n  const [users, setUsers] = useState([]);\n\n  useEffect(() => {\n    fetchUsers().then((data) => {\n      setUsers(data);\n    });\n  }, []);\n\n  return (\n    <div>\n      <h2>\u30e6\u30fc\u30b6\u4e00\u89a7<\/h2>\n      <div>\n        {users.map((user) => (\n          <div key={user.id}>{user.name}<\/div>\n        ))}\n      <\/div>\n    <\/div>\n  );\n}\n\nexport default User;\n<\/code><\/pre>\n\n\n\n
App.js\u30d5\u30a1\u30a4\u30eb\u306e\u66f4\u65b0<\/h3>\n\n\n\n
User\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u4f5c\u6210\u304c\u5b8c\u4e86\u3057\u305f\u3089App.js\u30d5\u30a1\u30a4\u30eb\u3092\u66f4\u65b0\u3057\u3066User\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092import\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\nimport User from '.\/components\/User';\n\nfunction App() {\n  return (\n    <div style={{ margin: '2em' }}>\n      <h1>\u30e6\u30fc\u30b6\u60c5\u5831<\/h1>\n      <User \/>\n    <\/div>\n  );\n}\n\nexport default App;\n<\/code><\/pre>\n\n\n\n
npm start\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u30d6\u30e9\u30a6\u30b6\u4e0a\u306b\u306f10\u540d\u5206\u306e\u30e6\u30fc\u30b6\u4e00\u89a7\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30e6\u30fc\u30b6\u4e00\u89a7\u8868\u793a\"
\u30e6\u30fc\u30b6\u4e00\u89a7\u8868\u793a<\/figcaption><\/figure>\n\n\n\n
useQuery\u3092\u5229\u7528\u3057\u306a\u3044\u65b9\u6cd5\u3067\u30e6\u30fc\u30b6\u4e00\u89a7\u3092\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u305f\u306e\u3067\u6b21\u306fuseQuery\u3092\u5229\u7528\u3057\u3066\u30e6\u30fc\u30b6\u4e00\u89a7\u3092\u8868\u793a\u3055\u305b\u307e\u3059\u3002<\/p>\n\n\n\n
useQuery\u3092\u5229\u7528\u3059\u308b\u5834\u5408<\/h2>\n\n\n\n
useQuery\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u306freact-query\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\n$ npm install react-query\n<\/code><\/pre>\n\n\n\n
User\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u306fuseQuery\u3092\u4f7f\u3063\u3066\u30b3\u30fc\u30c9\u3067\u66f8\u304d\u63db\u3048\u307e\u3059\u3002\u4e00\u6642\u7684\u306bmap\u95a2\u6570\u306e\u51e6\u7406\u306f\u5b9f\u884c\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u304a\u304d\u307e\u3059\u3002\u3053\u306e\u6642\u70b9\u3067\u5148\u307b\u3069\u5229\u7528\u3057\u3066\u3044\u305fReact Hook\u306euseState\u3068useEffect\u3092\u524a\u9664\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\nimport { useQuery } from 'react-query';\n\nconst fetchUsers = async () => {\n  const res = await fetch('https:\/\/jsonplaceholder.typicode.com\/users');\n  return res.json();\n};\n\nfunction User() {\n  const result = useQuery('users', fetchUsers);\n  console.log(result)\n  return (\n    <div>\n      <h2>\u30e6\u30fc\u30b6\u4e00\u89a7<\/h2>\n      <div>\n        {\/* data.map((user) => (\n          <div key={user.id}>{user.name}<\/div>\n        ))*\/}\n      <\/div>\n    <\/div>\n  );\n}\n\nexport default User;\n<\/code><\/pre>\n\n\n\n
useQuery\u3067\u306f\u30b3\u30fc\u30c9\u306b\u3042\u308b\u901a\u308a\u3001\u7b2c\u4e00\u5f15\u6570\u306b\u4efb\u610f\u306e\u540d\u524d\u306e\u30e6\u30cb\u30fc\u30af\u306a\u30ad\u30fc\u3001\u7b2c\u4e8c\u5f15\u6570\u306b\u306fpromise\u3092\u623b\u3059\u95a2\u6570\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\nconst result = useQuery('\u30e6\u30cb\u30fc\u30af\u30ad\u30fc', 'Promise\u3092\u8fd4\u3059\u95a2\u6570')\n<\/code><\/pre>\n\n\n\n
QueryClient\u306e\u8a2d\u5b9a<\/h3>\n\n\n\n
useQuery\u306e\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3046\u524d\u306bUser\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u89aa\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306eApp\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306eApp.js\u30d5\u30a1\u30a4\u30eb\u3067QueryClient\u3068QueryClientProvider\u306e\u8a2d\u5b9a\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
QueryClientProvider\u3067\u8981\u7d20\u3092\u5305\u307fQueryClient\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3057\u305fqueryclient\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002QueryClient\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u60c5\u5831\u306e\u3084\u308a\u3068\u308a\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\nimport { QueryClient, QueryClientProvider } from 'react-query';\nimport User from '.\/components\/User';\n\nconst queryClient = new QueryClient();\n\nfunction App() {\n  return (\n    <QueryClientProvider client={queryClient}>\n      <div style={{ margin: '2em' }}>\n        <h1>\u30e6\u30fc\u30b6\u60c5\u5831<\/h1>\n        <User \/>\n      <\/div>\n    <\/QueryClientProvider>\n  );\n}\n\nexport default App;\n<\/code><\/pre>\n\n\n\n
\u3082\u3057QueryClient\u3068QueryClientProvider\u306e\u8a2d\u5b9a\u3092\u884c\u306a\u3063\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
Error: No QueryClient set, use QueryClientProvider to set one<\/p>\n\n\n\n
useQuery\u306e\u5b9f\u884c\u7d50\u679c\u306e\u78ba\u8a8d<\/h3>\n\n\n\n
useQuery\u306e\u5b9f\u884c\u3067\u304d\u308b\u74b0\u5883\u304c\u6574\u3063\u305f\u306e\u3067\u30d6\u30e9\u30a6\u30b6\u3067\u30a2\u30af\u30bb\u30b9\u3057\u3066\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u306e\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002useQuery\u306e\u7d50\u679c\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u53d6\u5f97\u3067\u304d\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u7d50\u679c\u304c\u5165\u3063\u305fresult\u306e\u4e2d\u306b\u306f\u30e6\u30fc\u30b6\u60c5\u5831\u3060\u3051\u3067\u306f\u306a\u304fstatus, isLoading\u306a\u3069\u3055\u307e\u3056\u307e\u306a\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
https:\/\/googleads.g.doubleclick.net\/pagead\/ads?client=ca-pub-8739039484788204&output=html&h=280&adk=3535049316&adf=536278197&pi=t.aa~a.382006250~i.79~rp.4&w=704&fwrn=4&fwrnh=100&lmt=1659048522&num_ads=1&rafmt=1&armr=3&sem=mc&pwprc=1768429031&psa=1&ad_type=text_image&format=704×280&url=https%3A%2F%2Freffect.co.jp%2Freact%2Freact-use-query&host=ca-host-pub-2644536267352236&fwr=0&pra=3&rh=176&rw=704&rpe=1&resp_fmts=3&wgl=1&fa=27&adsid=ChEI8OeIlwYQ_Z3CtYmnxLHWARI9ALQQYaBgA8NeYhASGPLe8cAjkHDmkX3kUvR7q-qC0b_86_Y4PdTPd1K4LEJvNGTTxGCxgvJVbBElhZzxpg&uach=WyJXaW5kb3dzIiwiMTQuMC4wIiwieDg2IiwiIiwiMTAzLjAuNTA2MC4xMTQiLFtdLG51bGwsbnVsbCwiNjQiLFtbIi5Ob3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTAzLjAuNTA2MC4xMTQiXSxbIkNocm9taXVtIiwiMTAzLjAuNTA2MC4xMTQiXV0sZmFsc2Vd&dt=1659048279231&bpp=2&bdt=1728&idt=2&shv=r20220727&mjsv=m202207210101&ptt=9&saldr=aa&abxe=1&cookie=ID%3D72ab847ee502c8b1-22b0641a3ad50053%3AT%3D1658086331%3ART%3D1658086331%3AS%3DALNI_MaFhs3LemRNDLpJKPTF11AZqpii7g&gpic=UID%3D000007cbcdca71a4%3AT%3D1658086331%3ART%3D1659048279%3AS%3DALNI_MZ8c_-oA0w_Ax_VLTXLlvyVfXU8IQ&prev_fmts=0x0%2C670x135%2C670x132%2C1903x929%2C1005x124&nras=6&correlator=8753091633939&frm=20&pv=1&ga_vid=178854193.1658086331&ga_sid=1659048278&ga_hid=941102648&ga_fc=1&u_tz=540&u_his=3&u_h=1080&u_w=1920&u_ah=1032&u_aw=1920&u_cd=24&u_sd=1&dmc=8&adx=433&ady=8811&biw=1903&bih=929&scr_x=0&scr_y=5114&eid=44759876%2C44759927%2C44759842%2C44763505%2C44769950%2C21066435%2C42531607&oid=2&psts=AEC3cPJzNmfv-3OQWkZRty0AzlZ-NXuPtNAymfnwP7aiZ_z7bqtTfoD7nWLlpakBy4mNwOJ0NTkUTRC45cDojOdl2XAspW12oH4iIAENNFRO%2CAEC3cPKjtp1PYd480hLnIHbHBX42QGc4aRm7wAgBmPr8YKc3rWw48SnwLAzydewhfkCm0lIQCmJBZRxXdjFzVmc%2CAEC3cPJU6rK0g_8Hfq0iCtuy4oVt6d4ZhCSq9ogGPX9Xmo4ecVT64zj2SUacqSkYQyYccQX5WwAfGgUrZIPjRJA&pvsid=209501147727104&tmod=1031986503&uas=1&nvt=1&ref=https%3A%2F%2Fwww.google.com%2F&eae=0&fc=1408&brdim=-1920%2C3%2C-1920%2C3%2C1920%2C3%2C1920%2C1032%2C1920%2C929&vis=1&rsz=%7C%7Cs%7C&abl=NS&fu=128&bc=31&jar=2022-07-28-22&ifi=2&uci=a!2&btvi=4&fsb=1&xpc=ewftM5KJYC&p=https%3A\/\/reffect.co.jp&dtd=M<\/ins><\/p>\n\n\n\n
\u30d6\u30e9\u30a6\u30b6\u306e\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u306e\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u8868\u793a\u3055\u308c\u308b\uff12\u3064\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6bd4\u8f03\u3059\u308b\u3068status, isLoading, isSuccess\u306a\u3069\u5024\u304c\u7570\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"useQuery\u306e\u5b9f\u884c\u7d50\u679c\"
useQuery\u306e\u5b9f\u884c\u7d50\u679c<\/figcaption><\/figure>\n\n\n\n
status\u304cloading\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u958b\u3044\u3066\u307f\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u8907\u6570\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u304b\u3089\u69cb\u6210\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"status\u304cloading\u306e\u4e2d\u8eab\u3092\u78ba\u8a8d\"
status\u304cloading\u306e\u4e2d\u8eab\u3092\u78ba\u8a8d<\/figcaption><\/figure>\n\n\n\n
status\u304csuccess\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u958b\u3044\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n
\"status\u304csuccess\u306e\u4e2d\u8eab\u3092\u78ba\u8a8d\"
status\u304csuccess\u306e\u4e2d\u8eab\u3092\u78ba\u8a8d<\/figcaption><\/figure>\n\n\n\n
\uff12\u3064\u306e\u5185\u5bb9\u3092\u78ba\u8a8d\u3059\u308b\u3068status\u304cloading\u306e\u6642\u306fdata\u30d7\u30ed\u30d1\u30c6\u30a3\u306fundefined\u3067\u3059\u3002status\u304csucess\u306e\u6642\u306fdata\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306f\u30c7\u30fc\u30bf\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u30e6\u30fc\u30b6\u306e\u4e00\u89a7\u3092\u8868\u793a\u3055\u305b\u308b\u305f\u3081result\u306e\u4e2d\u304b\u3089data\u306e\u307f\u3092\u53d6\u5f97\u3057\u3066map\u95a2\u6570\u3067\u5c55\u958b\u3055\u305b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\nimport { useQuery } from 'react-query';\n\nconst fetchUsers = async () => {\n  const res = await fetch('https:\/\/jsonplaceholder.typicode.com\/users');\n  return res.json();\n};\n\nfunction User() {\n  const { data } = useQuery('users', fetchUsers);\n\n  return (\n    <div>\n      <h2>\u30e6\u30fc\u30b6\u4e00\u89a7<\/h2>\n      <div>\n        {data.map((user) => (\n          <div key={user.id}>{user.name}<\/div>\n        ))}\n      <\/div>\n    <\/div>\n  );\n}\n\nexport default User;\n<\/code><\/pre>\n\n\n\n
\u30d6\u30e9\u30a6\u30b6\u3067\u78ba\u8a8d\u3059\u308b\u3068\u201dTypeError: Cannot read property \u2018map\u2019 of undefined\u201d<\/strong>\u306e\u30a8\u30e9\u30fc\u753b\u9762\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u5148\u307b\u3069status\u304cloading\u306e\u5834\u5408\u306edata\u30d7\u30ed\u30d1\u30c6\u30a3\u304cundefined\u306b\u306a\u3063\u3066\u3044\u305f\u3053\u3068\u304c\u539f\u56e0\u3067\u3059\u3002loading\u306e\u72b6\u614b\u3067\u306f\u307e\u3060\u30e6\u30fc\u30b6\u60c5\u5831\u304c\u53d6\u5f97\u3067\u304d\u305f\u3044\u306a\u3044\u305f\u3081data\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u5024\u304c\u5165\u3063\u3066\u3044\u307e\u305b\u3093\u3002data\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5024\u304cundefined\u306a\u306e\u3067map\u95a2\u6570\u3067\u5c55\u958b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
https:\/\/googleads.g.doubleclick.net\/pagead\/ads?client=ca-pub-8739039484788204&output=html&h=280&adk=3535049316&adf=3199172792&pi=t.aa~a.382006250~i.101~rp.4&w=704&fwrn=4&fwrnh=100&lmt=1659048574&num_ads=1&rafmt=1&armr=3&sem=mc&pwprc=1768429031&psa=1&ad_type=text_image&format=704×280&url=https%3A%2F%2Freffect.co.jp%2Freact%2Freact-use-query&host=ca-host-pub-2644536267352236&fwr=0&pra=3&rh=176&rw=704&rpe=1&resp_fmts=3&wgl=1&fa=27&adsid=ChEI8OeIlwYQ_Z3CtYmnxLHWARI9ALQQYaBgA8NeYhASGPLe8cAjkHDmkX3kUvR7q-qC0b_86_Y4PdTPd1K4LEJvNGTTxGCxgvJVbBElhZzxpg&uach=WyJXaW5kb3dzIiwiMTQuMC4wIiwieDg2IiwiIiwiMTAzLjAuNTA2MC4xMTQiLFtdLG51bGwsbnVsbCwiNjQiLFtbIi5Ob3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTAzLjAuNTA2MC4xMTQiXSxbIkNocm9taXVtIiwiMTAzLjAuNTA2MC4xMTQiXV0sZmFsc2Vd&dt=1659048279235&bpp=1&bdt=1732&idt=1&shv=r20220727&mjsv=m202207210101&ptt=9&saldr=aa&abxe=1&cookie=ID%3D72ab847ee502c8b1-22b0641a3ad50053%3AT%3D1658086331%3ART%3D1658086331%3AS%3DALNI_MaFhs3LemRNDLpJKPTF11AZqpii7g&gpic=UID%3D000007cbcdca71a4%3AT%3D1658086331%3ART%3D1659048279%3AS%3DALNI_MZ8c_-oA0w_Ax_VLTXLlvyVfXU8IQ&prev_fmts=0x0%2C670x135%2C670x132%2C1903x929%2C1005x124%2C704x280&nras=7&correlator=8753091633939&frm=20&pv=1&ga_vid=178854193.1658086331&ga_sid=1659048278&ga_hid=941102648&ga_fc=1&u_tz=540&u_his=3&u_h=1080&u_w=1920&u_ah=1032&u_aw=1920&u_cd=24&u_sd=1&dmc=8&adx=433&ady=10943&biw=1903&bih=929&scr_x=0&scr_y=7232&eid=44759876%2C44759927%2C44759842%2C44763505%2C44769950%2C21066435%2C42531607&oid=2&psts=AEC3cPJzNmfv-3OQWkZRty0AzlZ-NXuPtNAymfnwP7aiZ_z7bqtTfoD7nWLlpakBy4mNwOJ0NTkUTRC45cDojOdl2XAspW12oH4iIAENNFRO%2CAEC3cPKjtp1PYd480hLnIHbHBX42QGc4aRm7wAgBmPr8YKc3rWw48SnwLAzydewhfkCm0lIQCmJBZRxXdjFzVmc%2CAEC3cPJU6rK0g_8Hfq0iCtuy4oVt6d4ZhCSq9ogGPX9Xmo4ecVT64zj2SUacqSkYQyYccQX5WwAfGgUrZIPjRJA%2CAEC3cPJKO1l3A6a1C8b_QFFOpit87o9NGKqMESEq_et3vHNn_jAMKtIz9QldNth5uCoAJFX4_EqeGOudBQCc9yU&pvsid=209501147727104&tmod=1031986503&uas=1&nvt=1&ref=https%3A%2F%2Fwww.google.com%2F&eae=0&fc=1408&brdim=-1920%2C3%2C-1920%2C3%2C1920%2C3%2C1920%2C1032%2C1920%2C929&vis=1&rsz=%7C%7Cs%7C&abl=NS&fu=128&bc=31&jar=2022-07-28-22&ifi=3&uci=a!3&btvi=5&fsb=1&xpc=jslHUTehKE&p=https%3A\/\/reffect.co.jp&dtd=M<\/ins><\/p>\n\n\n\n
useQuery\u3067\u306fstatus, isLoading, isError, isSucess\u306a\u3069\u30c7\u30fc\u30bf\u3060\u3051\u3067\u306f\u306a\u304f\u30c7\u30fc\u30bf\u53d6\u5f97\u306b\u95a2\u3059\u308b\u3055\u307e\u3056\u307e\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002data\u30d7\u30ed\u30d1\u30c6\u30a3\u304cundefined\u306b\u3088\u308b\u554f\u984c\u3082isLoading\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u89e3\u6c7a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30c7\u30fc\u30bf\u304cloading(\u307e\u3060data\u30d7\u30ed\u30d1\u30c6\u30a3\u304cundefined)\u306e\u9593\u306fisLoading\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5024\u306ftrue\u306b\u306a\u308a\u307e\u3059\u3002\u30c7\u30fc\u30bf\u304c\u53d6\u5f97\u5f8c\u306bisLoading\u304cfalse\u306b\u306a\u308b\u305f\u3081\u4e0b\u8a18\u306e\u3088\u3046\u306bif\u6587\u306b\u3088\u308b\u5206\u5c90\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067isLoading\u304ctrue\u306e\u5834\u5408\u306fmap\u95a2\u6570\u304c\u5b9f\u884c\u3055\u308c\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n
\nimport { useQuery } from 'react-query';\n\nconst fetchUsers = async () => {\n  const res = await fetch('https:\/\/jsonplaceholder.typicode.com\/users');\n  return res.json();\n};\n\nfunction User() {\n\n  const { data,isLoading } = useQuery('users', fetchUsers);\n\n  if (isLoading) {\n    return <span>Loading...<\/span>;\n  }\n\n  return (\n    <div>\n      <h2>\u30e6\u30fc\u30b6\u4e00\u89a7<\/h2>\n      <div>\n        {data.map((user) => (\n          <div key={user.id}>{user.name}<\/div>\n        ))}\n      <\/div>\n    <\/div>\n  );\n}\n\nexport default User;\n<\/code><\/pre>\n\n\n\n
isLoading\u304cfalse\u304b\u3089true\u306b\u306a\u308b\u307e\u3067map\u95a2\u6570\u3092\u5b9f\u884c\u3055\u308c\u306a\u3044\u306e\u3067\u30a8\u30e9\u30fc\u306f\u767a\u751f\u305b\u305a\u30e6\u30fc\u30b6\u306e\u4e00\u89a7\u3092\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\"useQuery\u306b\u3088\u308b\u30e6\u30fc\u30b6\u4e00\u89a7\u3092\u8868\u793a\"
useQuery\u306b\u3088\u308b\u30e6\u30fc\u30b6\u4e00\u89a7\u3092\u8868\u793a<\/figcaption><\/figure>\n\n\n\n
\u3053\u3053\u307e\u3067\u3067useQuery\u3092\u5229\u7528\u3057\u305f\u65b9\u6cd5\u3067\u3082\u30e6\u30fc\u30b6\u4e00\u89a7\u3092\u8868\u793a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u30a8\u30e9\u30fc\u306b\u5bfe\u3059\u308b\u51e6\u7406<\/h3>\n\n\n\n
\u30a8\u30e9\u30fc\u306b\u3088\u308a\u30c7\u30fc\u30bf\u304c\u53d6\u5f97\u3067\u304d\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\u306b\u3064\u3044\u3066\u306fisError\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3055\u305b\u308b\u305f\u3081\u306bfetch\u3092\u884c\u3046\u5834\u6240\u306f\u5b58\u5728\u3057\u306a\u3044URL(https:\/\/jsonplaceholder.typicode.co)\u306b\u5909\u66f4\u3057\u3066\u3044\u307e\u3059\u3002\u4eca\u56de\u306fresult\u306e\u4e2d\u304b\u3089data, isLoading\u306b\u52a0\u3048\u3066isError\u3068error\u3092\u5229\u7528\u3057\u307e\u3059\u3002error\u306b\u306f\u30a8\u30e9\u30fc\u306e\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\nimport { useQuery } from 'react-query';\n\nconst fetchUsers = async () => {\n  const res = await fetch('https:\/\/jsonplaceholder.typicode.co');\n  return res.json();\n};\n\nfunction User() {\n\n  const { data, isLoading, isError, error } = useQuery('users', fetchUsers);\n\n  if (isLoading) {\n    return <span>Loading...<\/span>;\n  }\n\n  if (isError) {\n    return <span>Error: {error.message}<\/span>;\n  }\n\n  return (\n    <div>\n      <h2>\u30e6\u30fc\u30b6\u4e00\u89a7<\/h2>\n      <div>\n        {data.map((user) => (\n          <div key={user.id}>{user.name}<\/div>\n        ))}\n      <\/div>\n    <\/div>\n  );\n}\n\nexport default User;\n<\/code><\/pre>\n\n\n\n
\u30d6\u30e9\u30a6\u30b6\u3067\u78ba\u8a8d\u3059\u308b\u3068\u3059\u3050\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u308f\u3051\u3067\u306f\u306a\u304f\u3057\u3070\u3089\u304f\u306e\u9593Loading\u306e\u753b\u9762\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\"Loading\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\"
Loading\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a<\/figcaption><\/figure>\n\n\n\n
\u4e00\u5b9a\u6642\u9593\u304c\u7d4c\u904e\u3059\u308b\u3068\u753b\u9762\u306b\u306f\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\"
\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a<\/figcaption><\/figure>\n\n\n\n
useQuery\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u6570\u884c\u306e\u30b3\u30fc\u30c9\u3060\u3051\u3067\u30a8\u30e9\u30fc\u3078\u306e\u5bfe\u5fdc\u3082\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u30a8\u30e9\u30fc\u306e\u51e6\u7406\u306b\u3064\u3044\u3066\u306f\u7406\u89e3\u3067\u304d\u307e\u3057\u305f\u304cLoading\u304b\u3089\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u8868\u793a\u307e\u3067\u306b\u4e00\u4f53\u4f55\u304c\u88cf\u5074\u3067\u8d77\u3053\u3063\u3066\u3044\u308b\u306e\u304b\u6c17\u306b\u306a\u308b\u306e\u3067\u3055\u3089\u306b\u8abf\u67fb\u3092\u9032\u3081\u307e\u3059\u3002<\/p>\n\n\n\n
\u30a8\u30e9\u30fc\u6642\u306b\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3092\u958b\u3044\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u898b\u308b\u3068\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3082\u8907\u6570\u56deGET\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30b3\u30f3\u30bd\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u78ba\u8a8d\"
\u30b3\u30f3\u30bd\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u78ba\u8a8d<\/figcaption><\/figure>\n\n\n\n
\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bf\u30d6\u3092\u78ba\u8a8d\u3059\u308b\u30683\u56defetch\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bf\u30d6\u306e\u78ba\u8a8d\"
\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bf\u30d6\u306e\u78ba\u8a8d<\/figcaption><\/figure>\n\n\n\n
React Query\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u78ba\u8a8d\u3059\u308b\u3068\u30c7\u30fc\u30bf\u304c\u53d6\u5f97\u3067\u304d\u306a\u3044\u5834\u5408\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f3\u56de\u306e\u30ea\u30c8\u30e9\u30a4\u3092\u884c\u3046\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002React Query\u306b\u306f\u81ea\u52d5\u3067\u30ea\u30c8\u30e9\u30a4\u6a5f\u80fd\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u30ea\u30c8\u30e9\u30a4\u306e\u56de\u6570\u306f\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u3088\u3063\u3066\u5909\u66f4\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30ea\u30c8\u30e9\u30a4\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u78ba\u8a8d\"
\u30ea\u30c8\u30e9\u30a4\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u78ba\u8a8d<\/figcaption><\/figure>\n\n\n\n
\u52d5\u4f5c\u78ba\u8a8d\u306e\u305f\u3081\u306b\u30ea\u30c8\u30e9\u30a4\u306e\u56de\u6570\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u306e3\u304b\u30895\u306b\u5909\u66f4\u3057\u3066\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3044\u307e\u3059\u3002\u30aa\u30d7\u30b7\u30e7\u30f3\u306fuseQuery\u306e\u7b2c\u4e09\u5f15\u6570\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\nconst { data, isLoading, isError, error } = useQuery('users', fetchUsers, {\n  retry: 5,\n});\n<\/code><\/pre>\n\n\n\n
5\u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u3067\u30ea\u30c8\u30e9\u30a4\u306e\u56de\u6570\u304c\u5897\u3048\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30ea\u30c8\u30e9\u30a4\u306e\u56de\u6570\u306e\u5909\u66f4\"
\u30ea\u30c8\u30e9\u30a4\u306e\u56de\u6570\u306e\u5909\u66f4<\/figcaption><\/figure>\n\n\n\n
\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u308b\u9593\u9694\u3092\u307f\u3066\u3044\u308b\u3068\u56de\u6570\u3092\u91cd\u306d\u308b\u305f\u3073\u306b\u9577\u304f\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u3082\u6c17\u3065\u304d\u307e\u3059\u3002\u30ea\u30c8\u30e9\u30a4\u306e\u9593\u9694\u306b\u3064\u3044\u3066\u3082\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u8a18\u8f09\u305b\u308c\u3066\u304a\u308a\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f1000ms\u304b\u3089\u59cb\u307e\u308a2\u500d\u3001\u3055\u3089\u306b2\u500d\u3068\u6307\u6570\u95a2\u6570\u7684\u306b\u9593\u9694\u304c\u5e83\u304f\u306a\u308a\u6700\u5927\u306f30\u79d2\u306b\u8a2d\u5b9a\u3055\u308c\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30ea\u30c8\u30e9\u30a4\u306e\u9593\u9694\"
\u30ea\u30c8\u30e9\u30a4\u306e\u9593\u9694<\/figcaption><\/figure>\n\n\n\n
\u30ea\u30c8\u30e9\u30a4\u3092\u884c\u3044\u305f\u304f\u306a\u3044\u5834\u5408\u306fretry\u3092false\u306b\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5373\u5ea7\u306b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u30a6\u30a3\u30f3\u30c9\u30a6\u30d5\u30a9\u30fc\u30ab\u30b9\u30ea\u30d5\u30a7\u30c3\u30c1<\/h3>\n\n\n\n
\u30a8\u30e9\u30fc\u306e\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3063\u3066\u3044\u308b\u969b\u306b\u753b\u9762\u306b\u201dError:Failed to fetch\u201d\u3068\u8868\u793a\u5f8c\u306b\u518d\u5ea6\u30d6\u30e9\u30a6\u30b6\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u518d\u5ea6Loading\u753b\u9762\u304c\u8868\u793a\u3055\u308c\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u51e6\u7406\u304c\u518d\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u3053\u308c\u306fuseQuery\u306e\u6301\u3064Window Focus Refetching\u6a5f\u80fd\u3067\u753b\u9762\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u81ea\u52d5\u3067Fetch\u304c\u518d\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u6642\u306b\u884c\u308f\u308c\u308b\u3082\u306e\u3067\u306f\u306a\u304f\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u306a\u3044\u5834\u5408\u3067\u3082\u518d\u30d5\u30a7\u30c3\u30c1\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002Window Focus Refetching\u6a5f\u80fd\u306b\u3064\u3044\u3066\u3082\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u518d\u5ea6\u6b63\u3057\u3044User\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306eURL\u3092\u6b63\u3057\u3044URL\u306b\u623b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\nconst res = await fetch('https:\/\/jsonplaceholder.typicode.com\/users');\n<\/code><\/pre>\n\n\n\n
\u30d6\u30e9\u30a6\u30b6\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u30e6\u30fc\u30b6\u4e00\u89a7\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bf\u30d6\u3092\u958b\u3044\u3066\u4e00\u5ea6\u5c65\u6b74\u306e\u524a\u9664\u3092\u884c\u306a\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u4e0b\u8a18\u306e\u753b\u9762\u306e\u8d64\u4e38\u3067\u56f2\u307e\u308c\u305f\u7981\u6b62\u30de\u30fc\u30af\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
\"\u5c65\u6b74\u306e\u524a\u9664\"
\u5c65\u6b74\u306e\u524a\u9664<\/figcaption><\/figure>\n\n\n\n
\u305d\u306e\u5f8c\u753b\u9762\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u30ea\u30d5\u30a7\u30c3\u30c1(\u30c7\u30fc\u30bf\u306e\u518d\u53d6\u5f97)\u304c\u81ea\u52d5\u3067\u884c\u308f\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30ea\u30d5\u30a7\u30c3\u30c1\u306e\u78ba\u8a8d\"
\u30ea\u30d5\u30a7\u30c3\u30c1\u306e\u78ba\u8a8d<\/figcaption><\/figure>\n\n\n\n
\u753b\u9762\u3092\u30af\u30ea\u30c3\u30af\u3059\u308c\u3070\u30ea\u30d5\u30a7\u30c3\u30c1\u304c\u884c\u308f\u308c\u308b\u308f\u3051\u3067\u306f\u306a\u304f\u305d\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u304b\u3089\u4e00\u5ea6\u5916\u308c\u306a\u3051\u308c\u3070\u753b\u9762\u3092\u4f55\u5ea6\u30af\u30ea\u30c3\u30af\u3057\u3066\u3082\u30ea\u30d5\u30a7\u30c3\u30c1\u306f\u884c\u308f\u308c\u307e\u305b\u3093\u3002\u4e00\u5ea6\u305d\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u304b\u3089\u5916\u308c\u5916\u5074\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u518d\u5ea6\u30a6\u30a3\u30f3\u30c9\u30a6\u306b\u623b\u308a\u30af\u30ea\u30c3\u30af\u3092\u884c\u3046\u3068\u30ea\u30d5\u30a7\u30c3\u30c1\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
Window Focus Refetching\u6a5f\u80fd\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306fon\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u30aa\u30d7\u30b7\u30e7\u30f3\u3067off\u306b\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\nconst { data, isLoading, isError, error } = useQuery('users', fetchUsers, {\n  refetchOnWindowFocus: false,\n});\n<\/code><\/pre>\n\n\n\n
\u8a2d\u5b9a\u5b8c\u4e86\u5f8c\u306b\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3082\u30ea\u30d5\u30a7\u30c3\u30c1\u306f\u884c\u308f\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n
Window Focus Refetching\u6a5f\u80fd\u306b\u3088\u3063\u3066\u30b5\u30fc\u30d0\u4e0a\u306e\u6700\u65b0\u306e\u60c5\u5831\u3092\u30e6\u30fc\u30b6\u304c\u610f\u8b58\u3059\u308b\u3053\u3068\u306a\u304f\u81ea\u52d5\u3067\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u52d5\u4f5c\u78ba\u8a8d<\/h3>\n\n\n\n
useQuery\u306e\u6a5f\u80fd\u306e\u4e2d\u3067\u91cd\u8981\u306a\u6a5f\u80fd\u306e\u4e00\u3064\u3067\u3042\u308b\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u3064\u3044\u3066\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30b5\u30fc\u30d0\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u3068\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f5\u5206\u9593(1000*60*5)\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u4e2d\u3067\u3042\u308c\u3070\u4e00\u5ea6\u30a2\u30f3\u30de\u30a6\u30f3\u30c8\u3057\u305f\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u518d\u5ea6\u30de\u30a6\u30f3\u30c8\u3059\u308b\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u306e\u3067\u3059\u3050\u306b\u30d6\u30e9\u30a6\u30b6\u4e0a\u306b\u30c7\u30fc\u30bf\u3092\u63cf\u5199\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u52d5\u4f5c\u78ba\u8a8d\u3092\u884c\u3046\u305f\u3081\u306bApp.js\u30d5\u30a1\u30a4\u30eb\u306bshow\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3057show\u3092true,false\u3068\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u3067User\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u8868\u793a\u3001\u975e\u8868\u793a(\u30de\u30a6\u30f3\u30c8\u3001\u30a2\u30f3\u30de\u30a6\u30f3\u30c8)\u3092\u5207\u308a\u66ff\u3048\u307e\u3059\u3002<\/p>\n\n\n\n
\nimport { useState } from 'react';\nimport { QueryClient, QueryClientProvider } from 'react-query';\nimport User from '.\/components\/User';\n\nconst queryClient = new QueryClient();\n\nfunction App() {\n  const [show, setShow] = useState(true);\n  return (\n    <QueryClientProvider client={queryClient}>\n      <div style={{ margin: '2em' }}>\n        <div>\n          <button onClick={() => setShow(!show)}>Toggle<\/button>\n        <\/div>\n        <h1>\u30e6\u30fc\u30b6\u60c5\u5831<\/h1>\n        {show && <User \/>}\n      <\/div>\n    <\/QueryClientProvider>\n  );\n}\n\nexport default App;\n<\/code><\/pre>\n\n\n\n
\u8a2d\u5b9a\u5f8c\u3001\u30d6\u30e9\u30a6\u30b6\u78ba\u8a8d\u3059\u308b\u3068toggle\u30dc\u30bf\u30f3\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u8868\u793a\u30fb\u975e\u8868\u793a\u3092\u5207\u308a\u66ff\u3048\u308b\u305f\u3081\u306etoggle\u30dc\u30bf\u30f3\"
\u8868\u793a\u30fb\u975e\u8868\u793a\u3092\u5207\u308a\u66ff\u3048\u308b\u305f\u3081\u306etoggle\u30dc\u30bf\u30f3<\/figcaption><\/figure>\n\n\n\n
toggle\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3053\u3068\u3067\u8868\u793a\u30fb\u975e\u8868\u793a\u304c\u884c\u308f\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002status\u3092\u898b\u308b\u3053\u3068\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u78ba\u8a8d\u3092\u884c\u3044\u307e\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5229\u7528\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306floading\u30b9\u30c6\u30fc\u30bf\u30b9\u304b\u3089success\u30b9\u30c6\u30fc\u30bf\u30b9\u306b\u5909\u308f\u308a\u307e\u3059\u3002\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u5834\u5408\u306floading\u30b9\u30c6\u30fc\u30bf\u30b9\u306f\u306a\u304fsuccess\u30b9\u30c6\u30fc\u30bf\u30b9\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\nconst { data, isLoading, isError, error, status } = useQuery(\n  'users',\n  fetchUsers,\n);\nconsole.log(status);\n<\/code><\/pre>\n\n\n\n
\u30a2\u30af\u30bb\u30b9\u3057\u305f\u76f4\u5f8c\u3067\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u5b58\u5728\u3057\u306a\u3044\u306e\u3067\u4e0b\u8a18\u306e\u3088\u3046\u306bloading, success\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30da\u30fc\u30b8\u3092\u958b\u3044\u305f\u76f4\u5f8c\"
\u30da\u30fc\u30b8\u3092\u958b\u3044\u305f\u76f4\u5f8c<\/figcaption><\/figure>\n\n\n\n
Toggle\u30dc\u30bf\u30f3\u3092\u4e00\u5ea6\u30af\u30ea\u30c3\u30af\u3057\u3066\u975e\u8868\u793a\u306b\u3057\u305f\u5f8c\u518d\u5ea6Toggle\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u306e\u3067success\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\"
\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u304d\u3083<\/figcaption><\/figure>\n\n\n\n
\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u53d6\u5f97\u3057\u3066\u3044\u3066\u3082\u30d5\u30a7\u30c3\u30c1\u306f\u884c\u308f\u308c\u306a\u304f\u306a\u308b\u308f\u3051\u3067\u306f\u306a\u304f\u30d0\u30c3\u30af\u30b0\u30e9\u30f3\u30c9\u3067\u5b9f\u884c\u3055\u308c\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u306f\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u3082\u3057\u30b5\u30fc\u30d0\u5074\u3067\u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u307e\u305a\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30c7\u30fc\u30bf\u304c\u8868\u793a\u3055\u308c\u3001\u30b5\u30fc\u30d0\u304b\u3089\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u5f8c\u5f8c\u306b\u5909\u66f4\u3057\u305f\u30c7\u30fc\u30bf\u304c\u53cd\u6620\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u671f\u9593\u306f5\u5206\u306a\u306e\u30671\u79d2\u306b\u5909\u66f4\u3057\u307e\u3059\u3002\u8a2d\u5b9a\u306fcacheTime\u3067\u8a2d\u5b9a\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5358\u4f4d\u306fms\u3067\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f1000*60*5\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\nconst { data, isLoading, isError, error, status } = useQuery(\n  'users',\n  fetchUsers,\n  {\n    cacheTime: 1000,\n  }\n);\nconsole.log(status);\n<\/code><\/pre>\n\n\n\n
\u30d6\u30e9\u30a6\u30b6\u3092\u30ea\u30ed\u30fc\u30c9\u3057\u3066\u3001\u5c11\u3057\u6642\u9593\u3092\u7f6e\u3044\u3066\u304b\u3089toggle\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5148\u307b\u3069\u3068\u306f\u7570\u306a\u308a\u307b\u3093\u306e\u4e00\u77ac\u306a\u306e\u3067\u898b\u3048\u306a\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304cloading\u2026\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002status\u3082success\u306e\u307f\u3067\u306f\u306a\u304floading\u306e\u5f8c\u306bsuccess\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\"cacheTime\u30921\u79d2\u306b\u8a2d\u5b9a\u3057\u305f\u5834\u5408\"
cacheTime\u30921\u79d2\u306b\u8a2d\u5b9a\u3057\u305f\u5834\u5408<\/figcaption><\/figure>\n\n\n\n
\u3082\u3057Loaing\u2026\u3092\u3057\u3063\u304b\u308a\u307f\u305f\u3044\u5834\u5408\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bf\u30d6\u3067Slow 3G\u306b\u5909\u66f4\u3092\u3057\u3066\u52d5\u4f5c\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
\"3G\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u8a2d\u5b9a\"
3G\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u8a2d\u5b9a<\/figcaption><\/figure>\n\n\n\n
useQuery\u3067cacheTime\u306e\u8a2d\u5b9a\u306e\u9593\u3067\u3042\u308c\u3070\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3055\u308c\u3066\u3044\u308b\u30c7\u30fc\u30bf\u304c\u5229\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u3053\u3053\u307e\u3067\u306e\u52d5\u4f5c\u78ba\u8a8d\u3067\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u30de\u30a6\u30f3\u30c8\u3057\u305f\u6642\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u6642\u306b\u30ea\u30d5\u30a7\u30c3\u30c1\u304c\u884c\u308f\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u307b\u304b\u306b\u30aa\u30d7\u30b7\u30e7\u30f3\u306erefetchInterval\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u8a2d\u5b9a\u3057\u305f\u9593\u9694\u3067\u30ea\u30d5\u30a7\u30c3\u30c1\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\n  const { data, isLoading, isError, error, status } = useQuery(\n    'users',\n    fetchUsers,\n    {\n      refetchInterval: 1000,\n    }\n  );\n<\/code><\/pre>\n\n\n\n
\u30d0\u30c3\u30af\u30b0\u30e9\u30f3\u30c9\u3067\u306f1\u79d2\u5f8c\u306b\u30d5\u30a7\u30c3\u30c1\u304c\u884c\u308f\u308c\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
Devtools\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h3>\n\n\n\n
React Query\u5c02\u7528\u306edevtools\u3082\u6e96\u5099\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u5229\u7528\u65b9\u6cd5\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002devtools\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067useQuery\u3067\u8a2d\u5b9a\u3057\u305f\u30e6\u30cb\u30fc\u30af\u30ad\u30fc\u3054\u3068\u306e\u30af\u30a8\u30ea\u30fc\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
App.js\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u3044\u3066ReactQueryDevtools\u3092import\u3057\u307e\u3059\u3002devtools\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u8ffd\u52a0\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u7b49\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306f\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002props\u306einitailIsOpen\u3067\u306fdevtool\u3092\u30a2\u30af\u30bb\u30b9\u6642\u306b\u30aa\u30fc\u30d7\u30f3\u3057\u305f\u72b6\u614b\u306b\u3059\u308b\u304b\u3069\u3046\u304b\u8a2d\u5b9a\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306ffalse\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\nimport { useState } from 'react';\nimport { QueryClient, QueryClientProvider } from 'react-query';\nimport User from '.\/components\/User';\nimport { ReactQueryDevtools } from 'react-query\/devtools';\n\nconst queryClient = new QueryClient();\n\nfunction App() {\n  const [show, setShow] = useState(true);\n  return (\n    <QueryClientProvider client={queryClient}>\n      <div style={{ margin: '2em' }}>\n        <div>\n          <button onClick={() => setShow(!show)}>Toggle<\/button>\n        <\/div>\n        <h1>\u30e6\u30fc\u30b6\u60c5\u5831<\/h1>\n        {show && <User \/>}\n      <\/div>\n      <ReactQueryDevtools initialIsOpen={false} \/>\n    <\/QueryClientProvider>\n  );\n}\n\nexport default App;\n<\/code><\/pre>\n\n\n\n
\u8a2d\u5b9a\u5f8c\u30d6\u30e9\u30a6\u30b6\u3067\u78ba\u8a8d\u3059\u308b\u3068\u5de6\u4e0b\u306bReact Query\u306e\u30ed\u30b4\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u8868\u793a\u3059\u308b\u5834\u6240\u3082props\u3067\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\"devtools\u8a2d\u5b9a\u5f8c\u306e\u753b\u9762\"
devtools\u8a2d\u5b9a\u5f8c\u306e\u753b\u9762<\/figcaption><\/figure>\n\n\n\n
\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068Devtool\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u5de6\u5074\u306e\u30d1\u30cd\u30eb\u306b\u306f[\u201cusers\u201d]\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306fuseQuery\u306e\u7b2c\u4e00\u5f15\u6570\u306b\u8a2d\u5b9a\u3057\u305f\u30ad\u30fc\u306e\u540d\u524d\u3067\u30ad\u30fc\u3092\u5909\u66f4\u3059\u308b\u3068\u3053\u3053\u306e\u540d\u524d\u3082\u5909\u308f\u308a\u307e\u3059\u3002\u3053\u306e\u30ad\u30fc\u306b\u3088\u3063\u3066\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u304c\u53f3\u5074\u306e\u30d1\u30cd\u30eb\u306b\u8868\u793a\u3055\u308c\u307e\u3059(Data Explorer)\u3002<\/p>\n\n\n\n
\"devtools\u304c\u958b\u3044\u305f\u72b6\u614b\"
devtools\u304c\u958b\u3044\u305f\u72b6\u614b<\/figcaption><\/figure>\n\n\n\n
Data Explorer\u3092\u30b9\u30af\u30ed\u30fc\u30eb\u3059\u308b\u3068\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bcacheTime\u306a\u3069\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u5024\u3082\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\"Query\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u78ba\u8a8d\"
Query\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u78ba\u8a8d<\/figcaption><\/figure>\n\n\n\n
\u4e0a\u90e8\u306b\u306f\u73fe\u5728\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u304c\u8868\u793a\u3055\u308c\u3001\u5de6\u304b\u3089fresh\u3001fetching, stale, inactive\u3068\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068fresh\u2192fetching\u2192stale\u306b\u306a\u308a\u307e\u3059\u3002stale\u306f\u30c7\u30fc\u30bf\u53d6\u5f97\u304b\u3089\u6642\u9593\u304c\u7d4c\u904e\u3057\u6700\u65b0\u306e\u60c5\u5831\u3067\u306f\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306fstale\u306e\u5024\u306f0\u306a\u306e\u3067\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u3068\u3059\u3050\u306bstale\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u306b\u79fb\u52d5\u3057\u307e\u3059\u3002stale\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u5909\u66f4\u3057\u6642\u9593\u3092\u4f38\u3070\u3059\u3068\u8a2d\u5b9a\u3057\u305f\u5024\u306e\u6642\u9593\u3060\u3051fresh\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u3067\u8868\u793a\u3055\u308c\u307e\u3059\u3002fresh\u306f\u30c7\u30fc\u30bf\u304c\u6700\u65b0\u60c5\u5831\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
Toggle\u30dc\u30bf\u30f3\u3092\u62bc\u3059\u3068User\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u975e\u8868\u793a\u306b\u306a\u308b\u306e\u3067\u4e0b\u8a18\u306e\u3088\u3046\u306binactive\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"\u975e\u8868\u793a\u306b\u3059\u308b\u3068inactive\"
\u975e\u8868\u793a\u306b\u3059\u308b\u3068inactive<\/figcaption><\/figure>\n\n\n\n
\u518d\u5ea6Toggle\u3092\u62bc\u3059\u3068stale\u306e\u72b6\u614b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
cacheTime\u30925\u5206\u304b\u30895\u79d2\u306b\u5909\u66f4\u3057\u3066Toggle\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u304f\u3060\u3055\u3044\u30025\u79d2\u5f8c\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u4f7f\u3048\u306a\u304f\u306a\u308b\u3068\u540c\u6642\u306bdevtool\u304b\u3089\u60c5\u5831\u304c\u6d88\u3048\u307e\u3059\u3002<\/p>\n\n\n\n
\u3053\u306e\u3053\u3068\u304b\u3089devtool\u304c\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u60c5\u5831\u3092\u898b\u3066\u3044\u308b\u3053\u3068\u3082\u308f\u304b\u308a\u307e\u3059\u3002devtool\u3092\u898b\u308b\u3053\u3068\u3067useQuery\u306e\u72b6\u614b\u3092\u76ee\u3067\u898b\u3066\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\"casheTime5\u79d2\u3092\u8a2d\u5b9a\u30575\u79d2\u7d4c\u904e\u3057\u305f\u72b6\u614b\"
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