{"id":38134,"date":"2023-07-17T10:00:15","date_gmt":"2023-06-07T23:46:26","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8react%e5%92%8ctypescript%e6%9d%a5%e6%9e%84%e5%bb%ba%e7%94%a8%e6%88%b7%e7%95%8c%e9%9d%a2%e3%80%82\/"},"modified":"2024-04-30T14:00:18","modified_gmt":"2024-04-30T06:00:18","slug":"%e4%bd%bf%e7%94%a8react%e5%92%8ctypescript%e6%9d%a5%e6%9e%84%e5%bb%ba%e7%94%a8%e6%88%b7%e7%95%8c%e9%9d%a2%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8react%e5%92%8ctypescript%e6%9d%a5%e6%9e%84%e5%bb%ba%e7%94%a8%e6%88%b7%e7%95%8c%e9%9d%a2%e3%80%82\/","title":{"rendered":"\u4f7f\u7528React\u548cTypeScript\u6765\u6784\u5efa\u7528\u6237\u754c\u9762"},"content":{"rendered":"

React\u516c\u5f0f\u7f51\u7ad9\u7684\u6587\u6863\u5df2\u4e8e2023\u5e743\u670816\u65e5\u8fdb\u884c\u4e86\u4fee\u8ba2\uff08\u8bf7\u53c2\u9605”Introducing react.dev”\uff09\u3002\u672c\u6587\u662f\u5bf9\u5165\u95e8\u6307\u5357\u7b2c1\u7ae0”\u63cf\u8ff0UI”\u7684\u7b80\u8981\u603b\u7ed3\uff0c\u540c\u65f6\u52a0\u5165\u4e86TypeScript\u7684\u4ee3\u7801\u3002\u7136\u800c\uff0c\u6211\u4eec\u7701\u7565\u4e86\u9488\u5bf9\u521d\u5b66\u8005\u7684JavaScript\u57fa\u7840\u89e3\u91ca\u3002<\/p>\n

\u53e6\u5916\uff0c\u8bf7\u53c2\u8003\u5176\u4ed6\u672c\u7cfb\u5217\u89e3\u8bf4\u7684\u6587\u7ae0\uff0c\u540d\u79f0\u4e3a\u201cReact + TypeScript: \u5b66\u4e60React\u5b98\u65b9\u6587\u6863\u57fa\u7840\u89e3\u8bf4\u300a\u5b66\u4e60React\u300b\u201d\u3002<\/p>\n

\u8fd9\u7bc7\u6587\u7ae0\u7684\u4e3b\u9898\u662f\u5173\u4e8eReact\u7ec4\u4ef6\u548cJSX\u8fd4\u56de\u503c\u7684\u5199\u6cd5\u3002React\u5e94\u7528\u7a0b\u5e8f\u901a\u8fc7\u7ec4\u5408\u7ec4\u4ef6\u5e76\u4f7f\u7528JSX\u6765\u7ed8\u5236\u9875\u9762\u3002\u6211\u4eec\u5728CodeSandbox\u4e0a\u516c\u5f00\u4e86\u4ee3\u7801\u793a\u4f8b\uff0c\u8bf7\u53c2\u8003\u3002<\/p>\n

\u5236\u4f5c\u4f60\u7684\u7b2c\u4e00\u4e2a\u7ec4\u4ef6<\/h2>\n

\u521b\u5efaReact\u7ec4\u4ef6\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n

    \n
  1. \n
      \u7ec4\u4ef6\u5fc5\u987b\u8981\u8fdb\u884c\u5bfc\u51fa\u3002<\/ol>\n<\/li>\n<\/ol>\n

       <\/p>\n

        \n
      1. \n
          \u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\u7ec4\u4ef6\u3002<\/ol>\n<\/li>\n<\/ol>\n

          \u5bfc\u51fa\u53ef\u4ee5\u662f\u9ed8\u8ba4\u5bfc\u51fa\u6216\u5177\u540d\u5bfc\u51fa\u3002<\/p>\n

          \u8fd4\u56de\u503c\u9700\u8981\u5728JSX\u4e2d\u52a0\u5165\u3002<\/p>\n

          JSX\u63cf\u8ff0\u539f\u5219\u4e0a\u662f\u4e00\u884c\u3002<\/p>\n

          \u5f53\u9700\u8981\u591a\u884c\u63cf\u8ff0\u65f6\uff0c\u8bf7\u52a1\u5fc5\u4f7f\u7528\u5706\u62ec\u53f7()\u5c06\u5176\u5305\u88f9\u8d77\u6765\u3002<\/p>\n

          \u5982\u679c\u6ca1\u6709\u5706\u62ec\u53f7\uff0creturn\u8bed\u53e5\u4f1a\u88ab\u8ba4\u4e3a\u662f\u5728\u6362\u884c\u5904\u7ed3\u675f\u3002<\/p>\n

          React\u7684\u51fd\u6570\u7ec4\u4ef6\u662f\u6307\u6309\u7167\u6807\u51c6JavaScript\u51fd\u6570\u5b9a\u4e49\u7684\u7ec4\u4ef6\u3002\u7136\u800c\uff0c\u7ec4\u4ef6\u540d\u79f0\u5fc5\u987b\u662f\u5927\u9a7c\u5cf0\u5f0f\u547d\u540d\uff08\u4e5f\u79f0\u4e3a\u5e15\u65af\u5361\u547d\u540d\u6cd5\uff09\uff08\u8bf7\u53c2\u8003\u300c\u6b65\u9aa42\uff1a\u5b9a\u4e49\u51fd\u6570\u300d\uff09\u3002<\/p>\n

          \u4ee5\u4e0b\u662f\u4e00\u4e2a\u7ec4\u4ef6\u7684\u793a\u4f8b\u4ee3\u7801\uff08JavaScript\u6a21\u5757\uff09\u3002\u5982\u679c\u4f7f\u7528TypeScript\uff0c\u8fd4\u56de\u503c\u5c06\u4f1a\u88ab\u63a8\u65ad\u51fa\u6765\u3002\u5982\u679c\u60f3\u8981\u660e\u786e\u5730\u6307\u5b9a\uff0c\u8bf7\u4f7f\u7528JSX.Element\u8fdb\u884c\u7c7b\u578b\u6ce8\u91ca\u3002<\/p>\n

          export<\/span> default<\/span> function<\/span> Profile<\/span>()<\/span> {<\/span>\r\n\treturn <\/span>(<\/span>\r\n\t\t<<\/span>img<\/span>\r\n\t\t\tsrc<\/span>=<\/span>'https:\/\/i.imgur.com\/MK3eW3Am.jpg'<\/span>\r\n\t\t\talt<\/span>=<\/span>'Katherine Johnson'<\/span>\r\n\t\t\/><\/span>\r\n\t)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
          \u5728React\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5177\u5907\u4ee3\u7801\u548c\u6807\u8bb0\u7684\u7ec4\u4ef6\u6765\u6784\u5efa\u4ece\u5c0f\u578bUI\u90e8\u4ef6\u5230\u6574\u4e2a\u9875\u9762\u7684\u5185\u5bb9\u3002\u800cReact\u5219\u4f7f\u7528JavaScript\u6765\u6e32\u67d3\u9875\u9762\u3002\u7c7b\u4f3cNext.js\u7684\u6846\u67b6\u66f4\u8fdb\u4e00\u6b65\uff0c\u80fd\u591f\u81ea\u52a8\u751f\u6210HTML\u9875\u9762\u4eceReact\u7ec4\u4ef6\u4e2d\u3002\u8fd9\u610f\u5473\u7740\u5728JavaScript\u4ee3\u7801\u52a0\u8f7d\u524d\uff0c\u6211\u4eec\u5c31\u80fd\u591f\u663e\u793a\u5e94\u7528\u7a0b\u5e8f\u5185\u5bb9\u7684\u4e00\u90e8\u5206\uff08\u53c2\u89c1\u201cComponents all the way down\u201d\uff09\u3002<\/p>\n
          \u6211\u5c06\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u63d0\u4f9b\u7684\u4ee3\u7801\u793a\u4f8b\u6539\u4e3a\u4e86React + TypeScript\uff0c\u5e76\u7a0d\u4f5c\u4fee\u6539\u540e\u53d1\u5e03\u5728\u4e0b\u9762\u7684001\u793a\u4f8b\u4e2d\u3002<\/p>\n
          React + TypeScript: \u63cf\u8ff0\u754c\u9762 01<\/h4>\n
           <\/p>\n
          \u7ec4\u4ef6\u7684\u5bfc\u5165\u548c\u5bfc\u51fa\uff08Importing and Exporting Components\uff09<\/h2>\n
          React\u53ef\u4ee5\u7528\u7ec4\u4ef6\u6765\u6784\u5efa\u5e94\u7528\u7a0b\u5e8f\u3002\u5b83\u7684\u4f18\u70b9\u662f\u53ef\u4ee5\u7ec4\u5408\u548c\u91cd\u590d\u4f7f\u7528\uff0c\u6613\u4e8e\u7ba1\u7406\u548c\u7ef4\u62a4\u3002\u5728\u524d\u7aef\u793a\u4f8b001\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u8ba9\u6211\u4eec\u7b80\u5316\u6839\u6a21\u5757\uff08src\/App.tsx\uff09\u3002\u5c06JSX\u7684\u5b9e\u8d28\u6807\u8bb0\u5206\u79bb\u5230\u53e6\u4e00\u4e2a\u6a21\u5757src\/Gallery.tsx\u4e2d\uff08\u793a\u4f8b002\uff09\u3002<\/p>\n
          import<\/span> {<\/span> FC<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> Profile<\/span> }<\/span> from<\/span> '<\/span>.\/Profile<\/span>'<\/span>;<\/span>\r\n\r\nexport<\/span> const<\/span> Gallery<\/span>:<\/span> FC<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n\treturn <\/span>(<\/span>\r\n\t\t<<\/span>section<\/span>><\/span>\r\n\t\t\t<<\/span>h1<\/span>><\/span>Amazing scientists<\/<\/span>h1<\/span>><\/span>\r\n\t\t\t<<\/span>Profile<\/span> \/><\/span>\r\n\t\t<\/<\/span>section<\/span>><\/span>\r\n\t);<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
          import<\/span> React<\/span> from<\/span> '<\/span>react<\/span>'<\/span>\r\nimport<\/span> {<\/span> Gallery<\/span> }<\/span> from<\/span> '<\/span>.\/Gallery<\/span>'<\/span>;<\/span>\r\nimport<\/span> '<\/span>.\/styles.css<\/span>'<\/span>;<\/span>\r\n\r\nexport<\/span> default<\/span> function<\/span> App<\/span>():<\/span> JSX<\/span>.<\/span>Element<\/span> {<\/span>\r\n\treturn<\/span> <<\/span>Gallery<\/span> \/>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
          \u6837\u4f8b002 \u25a0 React + TypeScript\uff1a\u63cf\u8ff0UI 02<\/h4>\n
           <\/p>\n
          React\u7ec4\u4ef6\u7684\u5bfc\u51fa\u53ef\u4ee5\u662f\u9ed8\u8ba4\u5bfc\u51fa\u6216\u5177\u540d\u5bfc\u51fa\u90fd\u53ef\u4ee5\u3002\u5728\u793a\u4f8b\u4e2d\uff0c\u6839\u7ec4\u4ef6(App)\u662f\u9ed8\u8ba4\u5bfc\u51fa\uff0c\u5b50\u7ec4\u4ef6(Gallery\u548cProfile)\u662f\u5177\u540d\u5bfc\u51fa\u3002\u8bf7\u6ce8\u610f\uff0c\u5bfc\u5165\u8bed\u6cd5\u4f1a\u7a0d\u5fae\u53d8\u5316\uff0c\u8bf7\u6ce8\u610f\u3002\u56e2\u961f\u7edf\u4e00\u4f7f\u7528\u5176\u4e2d\u4e00\u79cd\u65b9\u5f0f\u4e5f\u662f\u4e00\u4e2a\u60f3\u6cd5\uff08\u8bf7\u53c2\u8003\u300c\u9ed8\u8ba4\u5bfc\u51fa vs \u5177\u540d\u5bfc\u51fa\u300d\uff09\u3002\u53e6\u5916\uff0c\u9ed8\u8ba4\u5bfc\u51fa\u4e00\u6b21\u53ea\u80fd\u6709\u4e00\u4e2a\u6a21\u5757\u3002<\/p>\n
          \u4f7f\u7528JSX\u7f16\u5199\u6807\u8bb0<\/h2>\n
          JSX\u662fJavaScript\u7684\u8bed\u6cd5\u6269\u5c55\u3002\u5728JavaScript\u4ee3\u7801\u4e2d\uff0c\u53ef\u4ee5\u7f16\u5199\u7c7b\u4f3cHTML\u7684\u6807\u8bb0\u3002<\/p>\n
          \u968f\u7740Web\u53d8\u5f97\u8d8a\u6765\u8d8a\u4ea4\u4e92\u5f0f\uff0c\u5185\u5bb9\u4e5f\u5f00\u59cb\u7531\u903b\u8f91\u6765\u51b3\u5b9a\u3002\u56e0\u6b64\uff0cReact\u5c06HTML\u4ea4\u7ed9\u4e86JavaScript\uff0c\u5e76\u5c06\u6e32\u67d3\u903b\u8f91\u548c\u6807\u8bb0\u90fd\u5305\u542b\u5728\u7ec4\u4ef6\u4e2d\u3002<\/p>\n
          JSX\u8bed\u6cd5\u51e0\u4e4e\u9075\u5faaHTML\uff0c\u4f46\u89c4\u5219\u7a0d\u5fae\u4e25\u683c\u4e00\u4e9b\u3002<\/p>\n
            \n
          1. \n
              \u8fd4\u56de\u503c\u9700\u8981\u6574\u7406\u4e3a\u4e00\u4e2a\u6839\u5143\u7d20\u3002<\/ol>\n<\/li>\n<\/ol>\n
              \u5982\u679c\u4e0d\u60f3\u5c06\u5176\u5305\u542b\u5728\u4e00\u4e2a\u5143\u7d20\u4e2d\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u7247\u6bb5\uff08\u53c2\u8003” (<><\/>)”\uff09\u3002<\/p>\n
              \u6807\u7b7e\u5fc5\u987b\u5168\u90e8\u95ed\u5408\u3002<\/p>\n
              \u7a7a\u5143\u7d20\u4e5f\u5fc5\u987b\u8981\u95ed\u5408\u3002<\/p>\n
              \u8981\u6dfb\u52a0\u5230\u5143\u7d20\u7684\u5c5e\u6027\u901a\u5e38\u4e3a\u9a7c\u5cf0\u5f0f\uff08\u53c2\u8003\u5e38\u89c1\u7ec4\u4ef6\uff0c\u4f8b\u5982<\/p>\n
              \n
              \uff09\u3002<\/p>\n
              \u5c5e\u6027\u7684\u8fde\u5b57\u7b26(-)\u9700\u8981\u53bb\u6389\uff0c\u4f7f\u7528\u9a7c\u5cf0\u5f0f\u6765\u7f16\u5199\u3002<\/p>\n
              \u56e0\u4e3a\u5386\u53f2\u539f\u56e0\uff0c\u4e0eHTML\u76f8\u540c\uff0caria-*\u548cdata-*\u9700\u8981\u4f7f\u7528\u8fde\u5b57\u7b26\uff08\u53c2\u8003aria-*\u548cdata-*\uff09\u3002<\/p>\n<\/div>\n
              JSX \u770b\u8d77\u6765\u50cf\u662f HTML\uff0c\u4f46\u5b9e\u9645\u4e0a\u4f1a\u88ab\u8f6c\u6362\u4e3a JavaScript \u7684\u6807\u51c6\u5bf9\u8c61\u3002\u9664\u975e\u5c06\u8fd9\u4e24\u4e2a\u5bf9\u8c61\u653e\u5728\u4e00\u4e2a\u6570\u7ec4\u4e2d\uff0c\u5426\u5219\u4e0d\u80fd\u4ece\u51fd\u6570\u4e2d\u8fd4\u56de\u3002\u56e0\u6b64\uff0c\u7ec4\u4ef6\u7684\u8fd4\u56de\u503c\u7684 JSX \u5fc5\u987b\u88ab\u5c01\u88c5\u5728\u4e00\u4e2a\u5355\u4e00\u7684\u5143\u7d20\u4e2d\uff08\u53c2\u8003\u300c\u4e3a\u4ec0\u4e48\u9700\u8981\u5305\u88c5\u591a\u4e2a JSX \u6807\u7b7e\uff1f\u300d\uff09\u3002<\/p>\n
              \u5f53\u4f60\u60f3\u8981\u5c06\u5df2\u7ecf\u7f16\u5199\u597d\u7684HTML\u6807\u8bb0\u8f6c\u6362\u4e3aJSX\u65f6\uff0c\u4f60\u8fd8\u53ef\u4ee5\u4f7f\u7528\u8f6c\u6362\u5de5\u5177\uff08\u300c\u4e13\u4e1a\u63d0\u793a\uff1a\u4f7f\u7528JSX\u8f6c\u6362\u5668\u300d\uff09\u3002<\/p>\n
              \u5728JSX\u4e2d\u4f7f\u7528\u82b1\u62ec\u53f7({})\u6765\u4e66\u5199JavaScript\u4ee3\u7801 (\u5728JSX\u4e2d\u4f7f\u7528\u82b1\u62ec\u53f7\u7684JavaScript\u4ee3\u7801)<\/h2>\n
              \u5728JSX\u4e2d\uff0c\u7528\u4e8e\u7f16\u5199JavaScript\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u662f\u5927\u62ec\u53f7{}\u3002\u5c06\u4e0a\u8ff0\u793a\u4f8b002\u4e2d\u7684\u7ec4\u4ef6Profile\u6539\u5199\u4e3a\u4ee5\u4e0b\u65b9\u5f0f\u65f6\uff0c\u53ef\u4ee5\u5728JSX\u5185\u5f15\u7528JavaScript\u7684\u53d8\u91cf\uff08\u793a\u4f8b003\uff09\u3002<\/p>\n
              import<\/span> {<\/span> FC<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\nexport<\/span> const<\/span> Profile<\/span>:<\/span> FC<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n\tconst<\/span> photo<\/span> =<\/span> '<\/span>https:\/\/i.imgur.com\/MK3eW3As.jpg<\/span>'<\/span>;<\/span>\r\n\tconst<\/span> description<\/span> =<\/span> '<\/span>Katherine Johnson<\/span>'<\/span>;<\/span>\r\n\treturn<\/span> <<\/span>img<\/span> src<\/span>=<\/span>{<\/span>photo<\/span>}<\/span> alt<\/span>=<\/span>{<\/span>description<\/span>}<\/span> \/>;<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
              \u6837\u672c003\u25a0React + TypeScript\uff1a\u63cf\u8ff0UI 03<\/h4>\n
               <\/p>\n
              JSX\u4e2d\u7684\u82b1\u62ec\u53f7{}\u8bed\u6cd5\u4e0d\u4ec5\u9650\u4e8eJavaScript\u53d8\u91cf\u7684\u7f16\u5199\u3002\u5b83\u53ef\u4ee5\u5f15\u7528\u5305\u62ec\u51fd\u6570\u8c03\u7528\u5728\u5185\u7684\u4efb\u4f55JavaScript\u8868\u8fbe\u5f0f\u3002\u53e6\u5916\uff0c\u53ef\u4ee5\u5c06\u5728\u4efb\u4f55\u6a21\u5757\u4e2d\u59cb\u7ec8\u4fdd\u6301\u4e0d\u53d8\u7684\u53d8\u91cf\uff08\u5982\u4e0b\u6240\u793a\u7684copyrightOwner\uff09\u5b9a\u4e49\u5728\u7ec4\u4ef6\u7684\u5916\u90e8\u3002<\/p>\n
              import<\/span> {<\/span> Gallery<\/span> }<\/span> from<\/span> '<\/span>.\/Gallery<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> Footer<\/span> }<\/span> from<\/span> '<\/span>.\/Footer<\/span>'<\/span>;<\/span>\r\nimport<\/span> '<\/span>.\/styles.css<\/span>'<\/span>;<\/span>\r\n\r\nexport<\/span> default<\/span> function<\/span> App<\/span>():<\/span> JSX<\/span>.<\/span>Element<\/span> {<\/span>\r\n\treturn <\/span>(<\/span>\r\n\t\t<><\/span>\r\n\t\t\t<<\/span>Gallery<\/span> \/><\/span>\r\n\t\t\t<<\/span>Footer<\/span> \/><\/span>\r\n\t\t<\/><\/span>\r\n\t);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              import<\/span> {<\/span> FC<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> copyrightOwner<\/span> =<\/span> '<\/span>Fumio Nonaka<\/span>'<\/span>;<\/span>\r\nexport<\/span> const<\/span> Footer<\/span>:<\/span> FC<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n\tconst<\/span> getYear<\/span> =<\/span> ()<\/span> =><\/span> new<\/span> Date<\/span>().<\/span>getFullYear<\/span>();<\/span>\r\n\treturn <\/span>(<\/span>\r\n\t\t<<\/span>footer<\/span>><\/span>\r\n\t\t\tCopyright &#169;<\/span>2000-{<\/span>getYear<\/span>()<\/span>}<\/span> {<\/span>copyrightOwner<\/span>}<\/span>\r\n\t\t<\/<\/span>footer<\/span>><\/span>\r\n\t);<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
              \u5728\u7ed9JSX\u63d0\u4f9bJavaScript\u4ee3\u7801\u5bf9\u8c61\u7684\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u4f7f\u7528\u53cc\u82b1\u62ec\u53f7{}\u6765\u8fdb\u884c\u4e24\u6b21\u5d4c\u5957\u3002\u53e6\u5916\uff0c\u8bf7\u6ce8\u610fCSS\u5c5e\u6027\u5e94\u4f7f\u7528\u9a7c\u5cf0\u547d\u540d\u6cd5\uff08\u5982backgroundColor\u3001fontFamily\u548clineHeight\uff09\u3002<\/p>\n
              import<\/span> {<\/span> FC<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> copyrightOwner<\/span> =<\/span> '<\/span>Fumio Nonaka<\/span>'<\/span>;<\/span>\r\nexport<\/span> const<\/span> Footer<\/span>:<\/span> FC<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n\tconst<\/span> getYear<\/span> =<\/span> ()<\/span> =><\/span> new<\/span> Date<\/span>().<\/span>getFullYear<\/span>();<\/span>\r\n\treturn <\/span>(<\/span>\r\n\t\t<<\/span>footer<\/span>\r\n\t\t\tstyle<\/span>=<\/span>{<\/span>{<\/span>\r\n\t\t\t\tbackgroundColor<\/span>:<\/span> '<\/span>paleturquoise<\/span>'<\/span>,<\/span>\r\n\t\t\t\tfontFamily<\/span>:<\/span> '<\/span>Helvetica Neue<\/span>'<\/span>,<\/span>\r\n\t\t\t\tlineHeight<\/span>:<\/span> '<\/span>2rem<\/span>'<\/span>\r\n\t\t\t}<\/span>}<\/span>\r\n\t\t><\/span>\r\n\t\t\tCopyright &#169;<\/span>2000-{<\/span>getYear<\/span>()<\/span>}<\/span> {<\/span>copyrightOwner<\/span>}<\/span>\r\n\t\t<\/<\/span>footer<\/span>><\/span>\r\n\t);<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
              \u6b64\u5916\uff0c\u4e3a\u4e86\u5728\u5904\u7406\u591a\u4e2a\u53d8\u91cf(copyrightOwner)\u548c\u5bf9\u8c61(styles)\u65f6\u65b9\u4fbf\u7edf\u4e00\uff0c\u6709\u65f6\u5019\u4f1a\u5c06\u5b83\u4eec\u96c6\u4e2d\u653e\u5728\u4e00\u4e2a\u5bf9\u8c61(footerInfo)\u4e2d\u8fdb\u884c\u5904\u7406(\u793a\u4f8b004)\u3002<\/p>\n
              import<\/span> {<\/span> FC<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\nconst<\/span> footerInfo<\/span> =<\/span> {<\/span>\r\n\tcopyrightOwner<\/span>:<\/span> '<\/span>Fumio Nonaka<\/span>'<\/span>,<\/span>\r\n\tstyles<\/span>:<\/span> {<\/span>\r\n\t\tbackgroundColor<\/span>:<\/span> '<\/span>paleturquoise<\/span>'<\/span>,<\/span>\r\n\t\tfontFamily<\/span>:<\/span> '<\/span>Helvetica Neue<\/span>'<\/span>,<\/span>\r\n\t\tlineHeight<\/span>:<\/span> '<\/span>2rem<\/span>'<\/span>\r\n\t}<\/span>\r\n};<\/span>\r\nexport<\/span> const<\/span> Footer<\/span>:<\/span> FC<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n\tconst<\/span> getYear<\/span> =<\/span> ()<\/span> =><\/span> new<\/span> Date<\/span>().<\/span>getFullYear<\/span>();<\/span>\r\n\tconst<\/span> {<\/span> copyrightOwner<\/span>,<\/span> styles<\/span> }<\/span> =<\/span> footerInfo<\/span>;<\/span>\r\n\treturn <\/span>(<\/span>\r\n\t\t<<\/span>footer<\/span> style<\/span>=<\/span>{<\/span>styles<\/span>}<\/span>><\/span>\r\n\t\t\tCopyright &#169;<\/span>2000-{<\/span>getYear<\/span>()<\/span>}<\/span> {<\/span>copyrightOwner<\/span>}<\/span>\r\n\t\t<\/<\/span>footer<\/span>><\/span>\r\n\t);<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
              \u6837\u672c004\u25a0React + TypeScript\uff1a\u63cf\u8ff0UI 04<\/h4>\n
               <\/p>\n
              \u5c06\u5c5e\u6027\u4f20\u9012\u7ed9\u7ec4\u4ef6<\/h2>\n
              React\u7684\u7ec4\u4ef6\u901a\u8fc7\u79f0\u4e3aprops\u7684\u5c5e\u6027\u5c06\u6570\u636e\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u3002\u4f20\u9012\u65b9\u5f0f\u4e0eHTML\u6807\u7b7e\u5c5e\u6027\u76f8\u540c\u7684\u8bed\u6cd5\u3002\u7136\u800c\uff0c\u6570\u636e\u4e0d\u4ec5\u9650\u4e8e\u6587\u672c\uff0c\u8fd8\u5305\u62ecJavaScript\u7684\u6240\u6709\u503c\uff0c\u5982\u5bf9\u8c61\u3001\u6570\u7ec4\u548c\u51fd\u6570\u7b49\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f20\u9012\u8981\u5305\u542b\u5728\u5b50\u7ec4\u4ef6\u4e2d\u7684\u8282\u70b9(\u6587\u672c)\u3002<\/p>\n
              import<\/span> {<\/span> Gallery<\/span> }<\/span> from<\/span> '<\/span>.\/Gallery<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> Footer<\/span> }<\/span> from<\/span> '<\/span>.\/Footer<\/span>'<\/span>;<\/span>\r\nimport<\/span> '<\/span>.\/styles.css<\/span>'<\/span>;<\/span>\r\n\r\nexport<\/span> type<\/span> FooterInfo<\/span> =<\/span> {<\/span>\r\n\tcopyrightOwner<\/span>:<\/span> string<\/span>;<\/span>\r\n\tstyles<\/span>:<\/span> {<\/span>\r\n\t\tbackgroundColor<\/span>:<\/span> string<\/span>;<\/span>\r\n\t\tfontFamily<\/span>:<\/span> string<\/span>;<\/span>\r\n\t\tlineHeight<\/span>:<\/span> string<\/span>;<\/span>\r\n\t};<\/span>\r\n};<\/span>\r\nconst<\/span> footerInfo<\/span>:<\/span> FooterInfo<\/span> =<\/span> {<\/span>\r\n\tcopyrightOwner<\/span>:<\/span> '<\/span>Fumio Nonaka<\/span>'<\/span>,<\/span>\r\n\tstyles<\/span>:<\/span> {<\/span>\r\n\t\tbackgroundColor<\/span>:<\/span> '<\/span>paleturquoise<\/span>'<\/span>,<\/span>\r\n\t\tfontFamily<\/span>:<\/span> '<\/span>Helvetica Neue<\/span>'<\/span>,<\/span>\r\n\t\tlineHeight<\/span>:<\/span> '<\/span>2rem<\/span>'<\/span>\r\n\t}<\/span>\r\n};<\/span>\r\nexport<\/span> default<\/span> function<\/span> App<\/span>():<\/span> JSX<\/span>.<\/span>Element<\/span> {<\/span>\r\n\tconst<\/span> getYear<\/span> =<\/span> ()<\/span> =><\/span> new<\/span> Date<\/span>().<\/span>getFullYear<\/span>();<\/span>\r\n\treturn <\/span>(<\/span>\r\n\t\t<><\/span>\r\n\t\t\t<<\/span>Gallery<\/span> \/><\/span>\r\n\t\t\t<<\/span>Footer<\/span> footerInfo<\/span>=<\/span>{<\/span>footerInfo<\/span>}<\/span>><\/span>\r\n\t\t\t\tCopyright &#169;<\/span>2000-{<\/span>getYear<\/span>()<\/span>}<\/span> {<\/span>footerInfo<\/span>.<\/span>copyrightOwner<\/span>}<\/span>\r\n\t\t\t<\/<\/span>Footer<\/span>><\/span>\r\n\t\t<\/><\/span>\r\n\t);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u5b50\u7ec4\u4ef6\u63a5\u6536\u7684\u53c2\u6570\u662f\u4e00\u4e2a\u5bf9\u8c61(props)\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4ece\u7236\u7ec4\u4ef6\u4f20\u9012\u8fc7\u6765\u7684\u6240\u6709\u5c5e\u6027\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0cFooter\u7ec4\u4ef6\u4f7f\u7528\u5bf9\u8c61\u89e3\u6784\u8d4b\u503c\u6765\u63d0\u53d6\u5fc5\u8981\u7684\u5c5e\u6027(copyrightOwner\u548cstyles)\u3002\u53e6\u5916\uff0c\u63a5\u6536\u7684\u5b50\u8282\u70b9\u5c5e\u6027\u662fchildren(\u7c7b\u578b\u4e3aReact.ReactNode)\uff0c\u8bf7\u53c2\u8003”\u5c06JSX\u4f5c\u4e3achildren\u4f20\u9012”\u3002\u5b8c\u6574\u4ee3\u7801\u793a\u4f8b\u8bf7\u89c1\u6837\u4f8b005\u3002<\/p>\n
              import<\/span> React<\/span>,<\/span> {<\/span> FC<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\nimport<\/span> type<\/span> {<\/span> FooterInfo<\/span> }<\/span> from<\/span> '<\/span>.\/App<\/span>'<\/span>;<\/span>\r\n\r\ntype<\/span> Props<\/span> =<\/span> {<\/span>\r\n\tchildren<\/span>:<\/span> React<\/span>.<\/span>ReactNode<\/span>;<\/span>\r\n\tfooterInfo<\/span>:<\/span> FooterInfo<\/span>;<\/span>\r\n};<\/span>\r\nexport<\/span> const<\/span> Footer<\/span>:<\/span> FC<\/span><<\/span>Props<\/span>><\/span> =<\/span> ({<\/span>\r\n\tchildren<\/span>,<\/span>\r\n\tfooterInfo<\/span>:<\/span> {<\/span> copyrightOwner<\/span>,<\/span> styles<\/span> }<\/span>\r\n})<\/span> =><\/span> {<\/span>\r\n\treturn <\/span>(<\/span>\r\n\t\t<<\/span>footer<\/span> style<\/span>=<\/span>{<\/span>styles<\/span>}<\/span>><\/span>\r\n\t\t\t{<\/span>children<\/span>}<\/span>\r\n\t\t<\/<\/span>footer<\/span>><\/span>\r\n\t);<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
              \u6837\u4f8b005 \u25a0 React + TypeScript\uff1a\u63cf\u8ff0UI 05<\/h4>\n
               <\/p>\n
              \u5f53\u60f3\u8981\u5c06\u4e00\u4e2a\u5bf9\u8c61\u4e2d\u7684\u6240\u6709\u5c5e\u6027\u5206\u89e3\u5e76\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u6269\u5c55\u8bed\u6cd5\u3002\u4e0b\u9762\u63d0\u53d6\u7684\u4ee3\u7801\u662f\u5c06\u524d\u9762\u793a\u4f8b\u4e2d\u7684\u5c5e\u6027\uff08footerInfo\uff09\u7528\u6269\u5c55\u8bed\u6cd5\u91cd\u65b0\u7f16\u5199\u7684\u65b9\u5f0f\u3002<\/p>\n
              export<\/span> default<\/span> function<\/span> App<\/span>():<\/span> JSX<\/span>.<\/span>Element<\/span> {<\/span>\r\n\r\n\treturn <\/span>(<\/span>\r\n\t\t<><\/span>\r\n\r\n\t\t\t{<\/span>\/* <Footer footerInfo={footerInfo}> *\/<\/span>}<\/span>\r\n\t\t\t<<\/span>Footer<\/span> {<\/span>...<\/span>footerInfo<\/span>}<\/span>><\/span>\r\n\t\t\t\tCopyright &#169;<\/span>2000-{<\/span>getYear<\/span>()<\/span>}<\/span> {<\/span>footerInfo<\/span>.<\/span>copyrightOwner<\/span>}<\/span>\r\n\t\t\t<\/<\/span>Footer<\/span>><\/span>\r\n\t\t<\/><\/span>\r\n\t);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              type<\/span> Props<\/span> =<\/span> {<\/span>\r\n\r\n\t\/\/ footerInfo: FooterInfo;<\/span>\r\n\tcopyrightOwner<\/span>:<\/span> FooterInfo<\/span>[<\/span>'<\/span>copyrightOwner<\/span>'<\/span>];<\/span>\r\n\tstyles<\/span>:<\/span> FooterInfo<\/span>[<\/span>'<\/span>styles<\/span>'<\/span>];<\/span>\r\n};<\/span>\r\nexport<\/span> const<\/span> Footer<\/span>:<\/span> FC<\/span><<\/span>Props<\/span>><\/span> =<\/span> ({<\/span>\r\n\r\n\t\/\/ footerInfo: { copyrightOwner, styles }<\/span>\r\n\tcopyrightOwner<\/span>,<\/span>\r\n\tstyles<\/span>\r\n})<\/span> =><\/span> {<\/span>\r\n\treturn<\/span> <<\/span>footer<\/span> style<\/span>=<\/span>{<\/span>styles<\/span>}<\/span>><\/span>{<\/span>children<\/span>}<\/span><\/<\/span>footer<\/span>>;<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
              \u6bcf\u4e2a\u7ec4\u4ef6\u63a5\u6536\u7684\u5c5e\u6027(props)\u7684\u503c\u90fd\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u66f4\u6539\u3002\u4f46\u662f\uff0cprops\u672c\u8eab\u662f\u4e0d\u53ef\u53d8\u7684(immutable)\u3002\u5f53\u60f3\u8981\u6539\u53d8\u7ed9\u7ec4\u4ef6\u7684\u5c5e\u6027\u503c\u65f6(\u4f8b\u5982\u7528\u6237\u4ea4\u4e92\u6216\u6570\u636e\u66f4\u6539\u65f6)\uff0c\u5fc5\u987b\u4f9d\u8d56\u4e8e\u7236\u7ec4\u4ef6\u3002\u7136\u540e\uff0c\u4e00\u4e2a\u65b0\u7684\u6570\u503c\u5bf9\u8c61\u4f1a\u88ab\u521b\u5efa\u5e76\u4f20\u9012\u8fc7\u6765\u3002\u65e7\u5c5e\u6027\u4f1a\u88ab\u5e9f\u5f03\uff0cJavaScript\u4f1a\u4e3a\u65b0\u7684\u5bf9\u8c61\u5206\u914d\u5185\u5b58(\u53c2\u89c1”\u5c5e\u6027\u5982\u4f55\u968f\u65f6\u95f4\u6539\u53d8”)\u3002<\/p>\n
              \u6709\u6761\u4ef6\u7684\u6e32\u67d3<\/h2>\n
              \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4f60\u53ef\u80fd\u5e0c\u671b\u6839\u636e\u6761\u4ef6\u6765\u663e\u793a\u4e0d\u540c\u7684\u5185\u5bb9\u3002React\u53ef\u4ee5\u4f7f\u7528JavaScript\u6761\u4ef6\u8bed\u6cd5\u6765\u6539\u53d8\u8981\u6e32\u67d3\u7684JSX\u5185\u5bb9\u3002\u9996\u5148\u662fif\u8bed\u53e5\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u793a\u4f8b\u6839\u636e\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\uff08Item\uff09\u7684\u5c5e\u6027\uff08isPacked\uff09\u7684\u5e03\u5c14\u503c\u6765\u8fd4\u56de\u4e0d\u540c\u7684JSX\u503c\u3002<\/p>\n
              import<\/span> {<\/span> Item<\/span> }<\/span> from<\/span> '<\/span>.\/Item<\/span>'<\/span>;<\/span>\r\nimport<\/span> '<\/span>.\/styles.css<\/span>'<\/span>;<\/span>\r\n\r\nexport<\/span> default<\/span> function<\/span> PackingList<\/span>()<\/span> {<\/span>\r\n\treturn <\/span>(<\/span>\r\n\t\t<<\/span>section<\/span>><\/span>\r\n\t\t\t<<\/span>h1<\/span>><\/span>Sally Ride's Packing List<\/<\/span>h1<\/span>><\/span>\r\n\t\t\t<<\/span>ul<\/span>><\/span>\r\n\t\t\t\t<<\/span>Item<\/span> isPacked<\/span>=<\/span>{<\/span>true<\/span>}<\/span> name<\/span>=<\/span>\"Space suit\"<\/span> \/><\/span>\r\n\t\t\t\t<<\/span>Item<\/span> isPacked<\/span>=<\/span>{<\/span>true<\/span>}<\/span> name<\/span>=<\/span>\"Helmet with a golden leaf\"<\/span> \/><\/span>\r\n\t\t\t\t<<\/span>Item<\/span> isPacked<\/span>=<\/span>{<\/span>false<\/span>}<\/span> name<\/span>=<\/span>\"Photo of Tam\"<\/span> \/><\/span>\r\n\t\t\t<\/<\/span>ul<\/span>><\/span>\r\n\t\t<\/<\/span>section<\/span>><\/span>\r\n\t);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              import<\/span> {<\/span> FC<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\ntype<\/span> ItemDescriptions<\/span> =<\/span> {<\/span> isPacked<\/span>:<\/span> boolean<\/span>;<\/span> name<\/span>:<\/span> string<\/span> };<\/span>\r\nexport<\/span> const<\/span> Item<\/span>:<\/span> FC<\/span><<\/span>ItemDescriptions<\/span>><\/span> =<\/span> ({<\/span> isPacked<\/span>,<\/span> name<\/span> })<\/span> =><\/span> {<\/span>\r\n\tif <\/span>(<\/span>isPacked<\/span>)<\/span> {<\/span>\r\n\t\treturn<\/span> <<\/span>li<\/span> className<\/span>=<\/span>\"item\"<\/span>><\/span>{<\/span>name<\/span>}<\/span> \u2714<\/<\/span>li<\/span>>;<\/span>\r\n\t}<\/span>\r\n\treturn<\/span> <<\/span>li<\/span> className<\/span>=<\/span>\"item\"<\/span>><\/span>{<\/span>name<\/span>}<\/span><\/<\/span>li<\/span>>;<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
              \u7136\u800c\uff0c\u6839\u636e\u6761\u4ef6\u5206\u652f\u8fd4\u56de\u7684JSX\u51e0\u4e4e\u662f\u76f8\u540c\u7684\u3002\u5c06\u5171\u4eab\u4ee3\u7801\u5408\u5e76\u4e3a\u4e00\u79cd\u65b9\u5f0f\u53ef\u4ee5\u8282\u7701\u4fee\u590d\u548c\u4fee\u6539\u65f6\u7684\u4e0d\u5fc5\u8981\u7684\u5de5\u4f5c\u91cf\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4f7f\u7528\u6761\u4ef6(\u4e09\u5143)\u8fd0\u7b97\u7b26?:\uff08\u793a\u4f8b006\uff09\u3002<\/p>\n
              import<\/span> {<\/span> FC<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\ntype<\/span> ItemDescriptions<\/span> =<\/span> {<\/span> isPacked<\/span>:<\/span> boolean<\/span>;<\/span> name<\/span>:<\/span> string<\/span> };<\/span>\r\nexport<\/span> const<\/span> Item<\/span>:<\/span> FC<\/span><<\/span>ItemDescriptions<\/span>><\/span> =<\/span> ({<\/span> isPacked<\/span>,<\/span> name<\/span> })<\/span> =><\/span> {<\/span>\r\n\treturn<\/span> <<\/span>li<\/span> className<\/span>=<\/span>\"item\"<\/span>><\/span>{<\/span>isPacked<\/span> ?<\/span> name<\/span> +<\/span> '<\/span> \u2714<\/span>'<\/span> :<\/span> name<\/span>}<\/span><\/<\/span>li<\/span>>;<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
              \u6837\u4f8b006 \u25a0\u4f7f\u7528React + TypeScript\u63cf\u8ff0UI 06<\/h4>\n
               <\/p>\n
              \u4f7f\u7528\u903b\u8f91\u4e0e(&&)\u8fd0\u7b97\u7b26\u65f6\uff0c\u4ee3\u7801\u53ef\u4ee5\u66f4\u52a0\u7b80\u77ed\u3002\u5f53\u5de6\u8fb9\u8868\u8fbe\u5f0f\u7684\u503c\u4e3a\u5e03\u5c14\u503c\u65f6\uff0c\u5982\u679c\u4e3a\u771f\uff0c\u5219\u8fd4\u56de\u53f3\u8fb9\u8868\u8fbe\u5f0f\uff0c\u5982\u679c\u4e3a\u5047\uff0c\u5219\u8fd4\u56de\u5de6\u8fb9\u503c\u4e3a\u5047\u3002\u6b64\u5916\uff0c\u5728React\u4e2d\uff0cJSX\u6811\u4e2d\u7684\u5047\u503c\uff0c\u5982false\uff08null\u548cundefined\u4e5f\u540c\u6837\uff09\uff0c\u4e0d\u4f1a\u8fdb\u884c\u6e32\u67d3\uff08\u8bf7\u53c2\u9605\u300c\u903b\u8f91\u4e0e\u8fd0\u7b97\u7b26 (&&)\u300d\uff09\u3002<\/p>\n
              export<\/span> const<\/span> Item<\/span>:<\/span> FC<\/span><<\/span>ItemDescriptions<\/span>><\/span> =<\/span> ({<\/span> isPacked<\/span>,<\/span> name<\/span> })<\/span> =><\/span> {<\/span>\r\n\t\/\/ return <li className=\"item\">{isPacked ? name + ' \u2714' : name}<\/li>;<\/span>\r\n\treturn<\/span> <<\/span>li<\/span> className<\/span>=<\/span>\"item\"<\/span>><\/span>{<\/span>name<\/span>}<\/span> {<\/span>isPacked<\/span> &&<\/span> '<\/span>\u2714<\/span>'<\/span>}<\/span><\/<\/span>li<\/span>>;<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
              \u8bf7\u6ce8\u610f\u7684\u662f\uff0c\u903b\u8f91\u4e0e\u8fd0\u7b97\u7b26&&\u7684\u6761\u4ef6\u5224\u65ad\u548c\u8fd4\u56de\u503c\u662f\u4e0d\u540c\u7684\u3002\u5de6\u8fb9\u7684\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u6761\u4ef6\u4f1a\u8fdb\u884c\u5e03\u5c14\u503c\u8bc4\u4f30\u3002\u4f46\u662f\uff0c\u8fd4\u56de\u503c\u662f\u5de6\u8fb9\u6216\u53f3\u8fb9\u8868\u8fbe\u5f0f\u7684\u503c\u3002\u5982\u679c\u7ed9\u5de6\u8fb9\u4f20\u9012\u4e00\u4e2a\u6570\u503c\u8868\u8fbe\u5f0f\uff0c\u9664\u4e860\u4e4b\u5916\u7684\u503c\u4f1a\u88ab\u8bc4\u4f30\u4e3atrue\uff0c\u5e76\u8fd4\u56de\u53f3\u8fb9\u8868\u8fbe\u5f0f\u7684\u503c\u3002\u95ee\u9898\u51fa\u73b0\u5728\u503c\u4e3a0\u7684\u60c5\u51b5\u4e0b\u3002\u6761\u4ef6\u5224\u65ad\u4e3afalse\uff0c\u4f46\u8fd4\u56de\u503c\u5374\u53d8\u6210\u4e860\u3002\u8fd9\u51e0\u4e4e\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u90fd\u4e0d\u662f\u671f\u671b\u7684\u7ed3\u679c\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u8bf7\u5c06\u5de6\u8fb9\u4f5c\u4e3a\u6761\u4ef6\u8868\u8fbe\u5f0f\uff0c\u6216\u8005\u4f7f\u7528Boolean()\u51fd\u6570\u6216\u4e24\u4e2a\u903b\u8f91\u975e\u5426\u5b9a\u8fd0\u7b97\u7b26!\u5c06\u5176\u8f6c\u6362\u4e3a\u5e03\u5c14\u503c\u3002<\/p>\n
              \u6e32\u67d3\u5217\u8868<\/h2>\n
              \u6709\u65f6\u5019\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u4ece\u786e\u5b9a\u5f62\u5f0f\u7684\u591a\u4e2a\u6570\u636e\u4e2d\u4ee5\u5217\u8868\u65b9\u5f0f\u663e\u793a\u7ec4\u4ef6\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u6570\u7ec4\u5b58\u50a8\u8981\u5904\u7406\u7684\u6570\u636e\u662f\u5f88\u5408\u9002\u7684\u3002\u4f7f\u7528Array.prototype.filter()\u6216Array.prototype.map()\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4ece\u6570\u636e\u4e2d\u521b\u5efa\u7ec4\u4ef6\u5217\u8868\uff08\u6570\u7ec4\uff09\u3002<\/p>\n
              \u5f53React\u5728\u7ec4\u4ef6\u7684\u8fd4\u56de\u503c\u4e2d\u63d2\u5165JSX\u8282\u70b9\u6570\u7ec4\u65f6\uff0c\u4f1a\u6309\u987a\u5e8f\u6e32\u67d3\u8fd9\u4e9b\u8282\u70b9\u7684JSX\u5143\u7d20\u3002\u5728\u6b64\u8fc7\u7a0b\u4e2d\uff0c\u6bcf\u4e2a\u8282\u70b9\u7684\u6839\u5143\u7d20\u5fc5\u987b\u5177\u6709\u552f\u4e00\u7684key\u5c5e\u6027\u3002\u8fd9\u662f\u56e0\u4e3a\u901a\u8fc7key\u5c5e\u6027\uff0cReact\u53ef\u4ee5\u8bc6\u522b\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u54ea\u4e2a\u6570\u636e\u5bf9\u5e94\u4e8eJSX\u4e2d\u7684\u54ea\u4e2a\u5143\u7d20\uff08\u8bf7\u53c2\u9605\u300c\u4f7f\u7528key\u4fdd\u6301\u5217\u8868\u9879\u987a\u5e8f\u300d\uff09\u3002\u5173\u4e8ekey\uff0c\u6709\u4e24\u4e2a\u89c4\u5219\u5fc5\u987b\u9075\u5b88\uff08\u8bf7\u53c2\u9605\u300ckey\u7684\u89c4\u5219\u300d\uff09\u3002<\/p>\n
              key\u306e\u5024\u306fJSX\u30ce\u30fc\u30c9\u306e\u914d\u5217\u306e\u4e2d\u3067\u4e00\u610f\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n
              \u4ed6\u306eJSX\u30ce\u30fc\u30c9\u306e\u914d\u5217\u3068\u91cd\u8907\u3059\u308b\u306e\u306f\u7d50\u69cb\u3067\u3059\u3002<\/p>\n
              \u4e00\u5ea6\u4e0e\u3048\u305fkey\u306e\u5024\u306f\u5909\u3048\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n
              \u3082\u3068\u30c7\u30fc\u30bf\u3068JSX\u30ce\u30fc\u30c9\u306e\u5bfe\u5fdc\u304c\u8b58\u5225\u3067\u304d\u306a\u304f\u306a\u308b\u304b\u3089\u3067\u3059\u3002
              \n\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3057\u3066\u3044\u308b\u3068\u304d\u306b\u52d5\u7684\u306bkey\u306e\u5024\u3092\u751f\u6210\u3059\u308b\u306e\u3082\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n
              \u521b\u5efa\u4e00\u4e2a\u4e0e\u6570\u7ec4\u4e2d\u5404\u5143\u7d20\u76f8\u5bf9\u5e94\u7684\u65b0\u5143\u7d20\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528Array.prototype.map()\u65b9\u6cd5\u3002\u6211\u4eec\u5c06\u4f7f\u7528\u4e0b\u4e00\u4e2a\u6a21\u5757src\/data.ts\u4e2d\u7684people\u4f5c\u4e3a\u539f\u59cb\u6570\u636e\u6570\u7ec4\u3002<\/p>\n
              export<\/span> type<\/span> Person<\/span> =<\/span> {<\/span>\r\n\tid<\/span>:<\/span> number<\/span>;<\/span> \/\/ JSX\u3067key\u3068\u3057\u3066\u7528\u3044\u308b<\/span>\r\n\tname<\/span>:<\/span> string<\/span>;<\/span>\r\n\tprofession<\/span>:<\/span> string<\/span>;<\/span>\r\n\taccomplishment<\/span>:<\/span> string<\/span>;<\/span>\r\n\timageId<\/span>:<\/span> string<\/span>;<\/span>\r\n};<\/span>\r\nexport<\/span> const<\/span> people<\/span>:<\/span> Person<\/span>[]<\/span> =<\/span> [<\/span>\r\n\t{<\/span>\r\n\t\tid<\/span>:<\/span> 0<\/span>,<\/span>\r\n\t\tname<\/span>:<\/span> '<\/span>Creola Katherine Johnson<\/span>'<\/span>,<\/span>\r\n\t\tprofession<\/span>:<\/span> '<\/span>mathematician<\/span>'<\/span>,<\/span>\r\n\t\taccomplishment<\/span>:<\/span> '<\/span>spaceflight calculations<\/span>'<\/span>,<\/span>\r\n\t\timageId<\/span>:<\/span> '<\/span>MK3eW3A<\/span>'<\/span>\r\n\t},<\/span>\r\n\t\/\/ ...[\u7565]...<\/span>\r\n];<\/span>\r\n<\/code><\/pre>\n
              \u5728\u6839\u6a21\u5757src\/App.tsx\u4e2d\uff0c\u7ec4\u4ef6List\u4f1a\u4ece\u6570\u7ec4people\u4e2d\u521b\u5efa\u4e00\u4e2aJSX\u8282\u70b9\u6570\u7ec4listItems\uff0c\u5e76\u8fd4\u56de\u3002<\/p>\n
              import<\/span> {<\/span> people<\/span> }<\/span> from<\/span> .<\/span>\/<\/span>data<\/span>;<\/span>\r\nimport<\/span> {<\/span> getImageUrl<\/span> }<\/span> from<\/span> .<\/span>\/<\/span>utils<\/span>;<\/span>\r\nimport<\/span> type<\/span> {<\/span> Person<\/span> }<\/span> from<\/span> .<\/span>\/<\/span>data<\/span>;<\/span>\r\nimport<\/span> .<\/span>\/<\/span>styles<\/span>.<\/span>css<\/span>;<\/span>\r\n\r\nexport<\/span> default<\/span> function<\/span> List<\/span>()<\/span> {<\/span>\r\n\tconst<\/span> listItems<\/span> =<\/span> people<\/span>.<\/span>map<\/span>((<\/span>person<\/span>:<\/span> Person<\/span>)<\/span> =><\/span> {<\/span>\r\n\t\tconst<\/span> {<\/span> accomplishment<\/span>,<\/span> id<\/span>,<\/span> name<\/span>,<\/span> profession<\/span> }<\/span> =<\/span> person<\/span>;<\/span>\r\n\t\treturn <\/span>(<\/span>\r\n\t\t\t<<\/span>li<\/span> key<\/span>=<\/span>{<\/span>id<\/span>}<\/span>><\/span>\r\n\t\t\t\t<<\/span>img<\/span> src<\/span>=<\/span>{<\/span>getImageUrl<\/span>(<\/span>person<\/span>)<\/span>}<\/span> alt<\/span>=<\/span>{<\/span>name<\/span>}<\/span> \/><\/span>\r\n\t\t\t\t<<\/span>p<\/span>><\/span>\r\n\t\t\t\t\t<<\/span>b<\/span>><\/span>{<\/span>name<\/span>}<\/span><\/<\/span>b<\/span>><\/span>\r\n\t\t\t\t\t{<\/span>` <\/span>${<\/span>profession<\/span>}<\/span> `<\/span>}<\/span>\r\n\t\t\t\t\tknown for {<\/span>accomplishment<\/span>}<\/span>\r\n\t\t\t\t<\/<\/span>p<\/span>><\/span>\r\n\t\t\t<\/<\/span>li<\/span>><\/span>\r\n\t\t);<\/span>\r\n\t});<\/span>\r\n\treturn<\/span> <<\/span>ul<\/span>><\/span>{<\/span>listItems<\/span>}<\/span><\/<\/span>ul<\/span>>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              import<\/span> {<\/span> Person<\/span> }<\/span> from<\/span> \"<\/span>.\/data<\/span>\"<\/span>;<\/span>\r\n\r\nexport<\/span> function<\/span> getImageUrl<\/span>(<\/span>person<\/span>:<\/span> Person<\/span>)<\/span> {<\/span>\r\n\treturn<\/span> `https:\/\/i.imgur.com\/<\/span>${<\/span>person<\/span>.<\/span>imageId<\/span>}<\/span>s.jpg`<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u6211\u5df2\u5728\u4e0b\u9762\u7684\u793a\u4f8b007\u4e2d\u63d0\u4f9b\u4e86\u6574\u4e2a\u793a\u4f8b\u4ee3\u7801\u3002<\/p>\n
              React + TypeScript: \u63cf\u8ff0UI 07\u7684\u4f8b\u5b50<\/h4>\n
               <\/p>\n
              Array.prototype.filter\uff08\uff09\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u7531\u7b26\u5408\u6761\u4ef6\u7684\u5143\u7d20\u7ec4\u6210\u7684\u65b0\u6570\u7ec4\uff0c\u5176\u6570\u636e\u683c\u5f0f\u4e0d\u53d8\u3002\u901a\u8fc7\u5c06\u524d\u9762\u793a\u4f8b007\u4e2d\u7684List\u7ec4\u4ef6\u8fdb\u884c\u5982\u4e0b\u66f4\u6539\uff0c\u53ef\u4ee5\u663e\u793a\u5316\u5b66\u5bb6\u5217\u8868\u3002<\/p>\n
              \u914d\u5217\u5143\u7d20\u7684\u6570\u636e\u683c\u5f0f\u4fdd\u6301\u4e0d\u53d8\uff0cArray.prototype.filter()\u65b9\u6cd5\u4ece\u6761\u4ef6\u5339\u914d\u7684\u5143\u7d20\u8fd4\u56de\u65b0\u7684\u5143\u7d20\u6570\u7ec4\u3002\u901a\u8fc7\u5bf9\u524d\u9762\u793a\u4f8b007\u4e2dList\u7ec4\u4ef6\u7684\u4e0b\u5217\u66f4\u6539\uff0c\u53ef\u4ee5\u663e\u793a\u5316\u5b66\u5bb6\u5217\u8868\u3002<\/p>\n
              export<\/span> default<\/span> function<\/span> List<\/span>()<\/span> {<\/span>\r\n\tconst<\/span> chemists<\/span> =<\/span> people<\/span>.<\/span>filter<\/span>((<\/span>person<\/span>)<\/span> =><\/span> person<\/span>.<\/span>profession<\/span> ===<\/span> '<\/span>chemist<\/span>'<\/span>);<\/span>\r\n\t\/\/ const listItems = people.map((person: Person) => {<\/span>\r\n\tconst<\/span> listItems<\/span> =<\/span> chemists<\/span>.<\/span>map<\/span>((<\/span>person<\/span>:<\/span> Person<\/span>)<\/span> =><\/span> {<\/span>\r\n\r\n\t});<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u5982\u679c\u4f7f\u7528<><\/>\u8bed\u6cd5\u6765\u5305\u88c5JSX\u8282\u70b9\u7684\u6839\u8282\u70b9\u4e3a\u7247\u6bb5\uff0c\u5219\u65e0\u6cd5\u6dfb\u52a0key\u3002\u6700\u597d\u4f7f\u7528\u8bf8\u5982<\/p>\n
              \n
              \u4e4b\u7c7b\u7684\u5143\u7d20\u3002\u5982\u679c\u5fc5\u987b\u4f7f\u7528\u7247\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u8bed\u6cd5\u5e76\u63d0\u4f9bkey\uff08\u53c2\u89c1\u201c\u4e3a\u6bcf\u4e2a\u5217\u8868\u9879\u663e\u793a\u591a\u4e2aDOM\u8282\u70b9\u201d\uff09\u3002<\/p>\n
              key\u7684\u503c\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u4e5f\u8bb8\u4f60\u4f1a\u8ba4\u4e3a\u53ef\u4ee5\u4f7f\u7528\u6570\u636e\u6570\u7ec4\u7684\u7d22\u5f15\u6765\u4ee3\u66ff\u3002\u5b9e\u9645\u4e0a\uff0c\u5982\u679c\u6ca1\u6709\u63d0\u4f9bkey\uff0cReact\u4f1a\u65e0\u5948\u5730\u4f7f\u7528\u5185\u90e8\u7684\u6570\u7ec4\u7d22\u5f15\u3002\u4f46\u662f\uff0c\u4e00\u65e6\u6709\u6570\u636e\u7684\u6dfb\u52a0\u3001\u5220\u9664\u6216\u6392\u5e8f\uff0c\u7d22\u5f15\u5c31\u4f1a\u88ab\u91cd\u65b0\u5206\u914d\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u4e4b\u524d\u7ed9\u5b9a\u7684key\u503c\u5c31\u88ab\u8fdd\u53cd\u7b2c\u4e8c\u4e2a\u89c4\u5b9a\u800c\u6539\u53d8\u4e86\uff08\u8bf7\u53c2\u8003\u201c\u4e3a\u4ec0\u4e48React\u9700\u8981key\uff1f\u201d\uff09\u3002<\/p>\n
              \u4fdd\u6301\u7ec4\u4ef6\u7684\u7eaf\u6d01\u6027<\/h2>\n
              \u7d14\u7cb9\u7684\u529f\u80fd\u53ea\u5bf9\u7ed9\u5b9a\u7684\u6570\u636e\u8fdb\u884c\u64cd\u4f5c\u3002React\u7ec4\u4ef6\u901a\u8fc7\u4f7f\u7528\u7eaf\u7cb9\u7684\u51fd\u6570\u7f16\u5199\uff0c\u53ef\u4ee5\u51cf\u5c11\u4ee3\u7801\u7684\u6269\u5f20\uff0c\u5e76\u51cf\u5c11\u9519\u8bef\u548c\u610f\u5916\u884c\u4e3a\u7684\u56f0\u6270\u3002\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u51fd\u6570\u5177\u6709\u4ee5\u4e0b\u4e24\u4e2a\u7279\u70b9\uff08\u53c2\u89c1\u201c\u7eaf\u5ea6\uff1a\u7ec4\u4ef6\u4f5c\u4e3a\u516c\u5f0f\u201d\uff09\u3002<\/p>\n
              \u95a2\u6570\u5185\u306e\u30c7\u30fc\u30bf\u3060\u3051\u3092\u52a0\u5de5\u3059\u308b: \u95a2\u6570\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u524d\u306b\u5916\u306b\u3042\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u5909\u6570\u306f\u5909\u3048\u307e\u305b\u3093\u3002<\/p>\n
              \u5165\u529b\u304c\u540c\u3058\u306a\u3089\u51fa\u529b\u3082\u540c\u3058: \u540c\u3058\u5165\u529b\u3092\u4e0e\u3048\u3089\u308c\u305f\u3089\u3001\u7d14\u7c8b\u306a\u95a2\u6570\u306e\u51fa\u529b\u3059\u308b\u7d50\u679c\u306f\u3064\u306d\u306b\u540c\u3058\u3060\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n
              \u6362\u53e5\u8bdd\u8bf4\uff0cReact\u7684\u7eaf\u7ec4\u4ef6\u5728\u88ab\u4e24\u6b21\u8c03\u7528\u65f6\u5fc5\u987b\u8fd4\u56de\u76f8\u540c\u7684JSX\u3002StrictMode\u662f\u7528\u6765\u9a8c\u8bc1\u8fd9\u4e00\u70b9\u7684\u3002\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4f1a\u5bf9\u7ec4\u4ef6\u7684\u521d\u59cb\u6e32\u67d3\u51fd\u6570\u8fdb\u884c\u4e24\u6b21\u8c03\u7528\u3002StrictMode\u4f1a\u6d4b\u8bd5\u7ec4\u4ef6\u51fd\u6570\u662f\u5426\u662f\u7eaf\u51fd\u6570\uff08\u8bf7\u53c2\u9605\u300cDetecting impure calculations with StrictMode\u300d\uff09\u3002\u53e6\u5916\uff0c\u8be6\u7ec6\u4fe1\u606f\u8bf7\u9605\u8bfb\u300cReact + TypeScript: \u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30a8\u30d5\u30a7\u30af\u30c8(useEffect)\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u300d\u3002<\/p>\n
              \u7eaf\u7cb9\u7684\u51fd\u6570\u4e0d\u4f1a\u4fee\u6539\u8d85\u51fa\u5176\u4f5c\u7528\u57df\u8303\u56f4\u7684\u53d8\u91cf\u6216\u5bf9\u8c61\uff08\u8fd9\u79cd\u4fee\u6539\u88ab\u79f0\u4e3a\u201c\u7a81\u53d8\u201d\uff09\u3002\u7136\u800c\uff0c\u5728\u51fd\u6570\u6e32\u67d3\u65f6\uff0c\u5728\u4f5c\u7528\u57df\u5185\u521b\u5efa\u5e76\u4fee\u6539\u5bf9\u8c61\u662f\u53ef\u4ee5\u7684\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u662f\u4e00\u4e2a\u4f8b\u5b50\uff0c\u79f0\u4e3a\u201c\u5c40\u90e8\u7a81\u53d8\u201d\uff08\u53c2\u8003\u201c\u5c40\u90e8\u7a81\u53d8\uff1a\u60a8\u7ec4\u4ef6\u7684\u5c0f\u79d8\u5bc6\u201d\uff09\u3002<\/p>\n
              import<\/span> {<\/span> FC<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\n\r\ntype<\/span> Props<\/span> =<\/span> {<\/span>\r\n\tguest<\/span>:<\/span> number<\/span>;<\/span>\r\n};<\/span>\r\nconst<\/span> Cup<\/span>:<\/span> FC<\/span><<\/span>Props<\/span>><\/span> =<\/span> ({<\/span> guest<\/span> })<\/span> =><\/span> {<\/span>\r\n\treturn<\/span> <<\/span>h2<\/span>><\/span>Tea cup for guest #{<\/span>guest<\/span>}<\/span><\/<\/span>h2<\/span>>;<\/span>\r\n};<\/span>\r\nexport<\/span> default<\/span> function<\/span> TeaGathering<\/span>()<\/span> {<\/span>\r\n\tconst<\/span> cups<\/span> =<\/span> [];<\/span>\r\n\tfor <\/span>(<\/span>let<\/span> i<\/span> =<\/span> 1<\/span>;<\/span> i<\/span> <=<\/span> 12<\/span>;<\/span> i<\/span>++<\/span>)<\/span> {<\/span>\r\n\t\tcups<\/span>.<\/span>push<\/span>(<<\/span>Cup<\/span> key<\/span>=<\/span>{<\/span>i<\/span>}<\/span> guest<\/span>=<\/span>{<\/span>i<\/span>}<\/span> \/>);<\/span>\r\n\t}<\/span>\r\n\treturn<\/span> cups<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
              \u51fd\u6570\u5fc5\u987b\u4fdd\u6301\u7eaf\u51c0\uff0c\u7136\u800c\u6709\u65f6\u9700\u8981\u8fdb\u884c\u5c4f\u5e55\u66f4\u65b0\u3001\u52a8\u753b\u6216\u6570\u636e\u53d8\u66f4\u7b49\u64cd\u4f5c\u3002\u8fd9\u4e9b\u5c31\u662f\u526f\u4f5c\u7528\uff08\u8bf7\u53c2\u8003\u201c\u53ef\u4ee5\u5f15\u8d77\u526f\u4f5c\u7528\u7684\u5730\u65b9\u201d\uff09\u3002<\/p>\n
              \u5728React\u4e2d\uff0c\u901a\u5e38\u526f\u4f5c\u7528\u4f1a\u7531\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u5904\u7406\u3002\u4f46\u662f\uff0c\u7ec4\u4ef6\u4e2d\u5b9a\u4e49\u7684\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u5728\u6e32\u67d3\u671f\u95f4\u4e0d\u4f1a\u88ab\u6267\u884c\u3002\u56e0\u6b64\uff0c\u5904\u7406\u7a0b\u5e8f\u51fd\u6570\u4e0d\u9700\u8981\u662f\u7eaf\u51fd\u6570\u3002\u5bf9\u4e8e\u90a3\u4e9b\u5f88\u96be\u5728\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u4e2d\u5904\u7406\u7684\u526f\u4f5c\u7528\uff0c\u53ef\u4ee5\u4f7f\u7528useEffect\u3002\u5904\u7406\u5c06\u5728\u5141\u8bb8\u526f\u4f5c\u7528\u7684\u6e32\u67d3\u4e4b\u540e\u8fdb\u884c\uff08\u8bf7\u53c2\u8003\u201cReact + TypeScript\uff1a\u54cd\u5e94\u5f0f\u6548\u679c\uff08useEffect\uff09\u7684\u751f\u547d\u5468\u671f\u201d\uff09\u3002\u4f46\u662f\uff0c\u8bf7\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\uff08\u8bf7\u53c2\u8003\u201cReact\uff1a\u4e0d\u9700\u8981\u4f7f\u7528\u6548\u679c\uff08useEffect\uff09\u7684\u60c5\u51b5\u201d\uff09\u3002<\/p>\n
              \u5173\u4e8eReact\u7684\u57fa\u7840\u77e5\u8bc6\uff0c\u6211\u4e3b\u8981\u8bb2\u89e3\u4e86\u51fd\u6570\u7ec4\u4ef6\u548cJSX\u3002\u7531\u4e8e\u5e76\u6ca1\u6709\u8be6\u7ec6\u8ba8\u8bbaTypeScript\u7684\u7c7b\u578b\u5b9a\u4e49\uff0c\u5efa\u8bae\u60a8\u53c2\u8003CodeSandbox\u4e0a\u7684\u793a\u4f8b\u4ee3\u7801\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
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