{"id":38274,"date":"2023-12-29T22:18:03","date_gmt":"2023-02-28T03:30:31","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%ad%a6%e4%b9%a0react-18-2-0%e5%85%bc%e5%ae%b9%e7%9a%84jsx%e8%af%ad%e6%b3%95%ef%bc%8c%e8%af%a6%e7%bb%86%e5%9c%b0%e5%b1%95%e7%a4%bahello-world%e7%9b%b4%e5%88%b0%e5%91%88%e7%8e%b0%e3%80%82\/"},"modified":"2024-05-04T15:55:41","modified_gmt":"2024-05-04T07:55:41","slug":"%e5%ad%a6%e4%b9%a0react-18-2-0%e5%85%bc%e5%ae%b9%e7%9a%84jsx%e8%af%ad%e6%b3%95%ef%bc%8c%e8%af%a6%e7%bb%86%e5%9c%b0%e5%b1%95%e7%a4%bahello-world%e7%9b%b4%e5%88%b0%e5%91%88%e7%8e%b0%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%ad%a6%e4%b9%a0react-18-2-0%e5%85%bc%e5%ae%b9%e7%9a%84jsx%e8%af%ad%e6%b3%95%ef%bc%8c%e8%af%a6%e7%bb%86%e5%9c%b0%e5%b1%95%e7%a4%bahello-world%e7%9b%b4%e5%88%b0%e5%91%88%e7%8e%b0%e3%80%82\/","title":{"rendered":"\u5b66\u4e60React 18.2.0\u517c\u5bb9\u7684JSX\u8bed\u6cd5\uff0c\u8be6\u7ec6\u5730\u5c55\u793aHello World\u76f4\u5230\u5448\u73b0"},"content":{"rendered":"

\u76ee\u6807<\/h1>\n

\u6211\u6b63\u5728\u81ea\u5b66React\u3002\u6211\u8ba4\u4e3a\u6211\u5fc5\u987b\u5b66\u4e60\u6700\u65b0\u7248\u672c\u7684React 18.2.0\uff01\u6240\u4ee5\u6211\u6253\u7b97\u4ece\u5934\u5230\u5c3e\u590d\u4e60\u4e00\u904d\u3002\u4f5c\u4e3a\u5bf9\u81ea\u5df1\u7684\u63d0\u9192\uff0c\u6211\u4f1a\u8bb0\u5f55\u4e0b\u5173\u4e8eJSX\u8bed\u6cd5\u7684\u57fa\u672c\u77e5\u8bc6\u3002\u5982\u679c\u6709\u4efb\u4f55\u5efa\u8bae\uff0c\u6bd4\u5982\u5b66\u4e60\u54ea\u4e9b\u5185\u5bb9\u6216\u8005\u54ea\u4e9b\u65b9\u6cd5\u66f4\u597d\uff0c\u6211\u975e\u5e38\u5e0c\u671b\u60a8\u80fd\u7559\u4e0b\u8bc4\u8bba\u3002<\/p>\n

\u5c06\u56fe\u50cf\u8f93\u51fa\u7684\u65b9\u6cd5<\/h1>\n

\u5728\u6839\u8282\u70b9\u4e2d\u76f4\u63a5\u4e66\u5199\u6e32\u67d3\u4ee3\u7801\uff0c\u663e\u793a”HelloWorld!”\u3002<\/h1>\n
import<\/span> {<\/span> createRoot<\/span> }<\/span> from<\/span> \"<\/span>react-dom\/client<\/span>\"<\/span>;<\/span> \/\/react-dom\/client\u304b\u3089creatRoot\u3092\u30a4\u30f3\u30dd\u30fc\u30c8(createRoot\u95a2\u6570\u304c\u5229\u7528\u53ef\u80fd\u3068\u306a\u308b)<\/span>\r\n\r\nconst<\/span> rootElement<\/span> =<\/span> document<\/span>.<\/span>getElementById<\/span>(<\/span>\"<\/span>root<\/span>\"<\/span>);<\/span> \/\/index.html\u306e<div id=\"root\"><\/div>\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u30a4\u30e1\u30fc\u30b8<\/span>\r\nconst<\/span> root<\/span> =<\/span> createRoot<\/span>(<\/span>rootElement<\/span>);<\/span>\/\/\u53d6\u5f97\u3057\u305f\u30eb\u30fc\u30c8\u8981\u7d20\u3092\u6307\u5b9a\u3057\u3066\u65b0\u3057\u3044\u30eb\u30fc\u30c8\u3092\u4f5c\u6210\u3001\u65b0\u3057\u3044\u30eb\u30fc\u30c8\u304c root \u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u308b<\/span>\r\n\r\nroot<\/span>.<\/span>render<\/span>(<\/span>\r\n  <><\/span>\r\n    <<\/span>h1<\/span>><\/span>HelloWorld!<\/<\/span>h1<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>\u3044\u3068\u3063\u3061\u3067\u3059<\/<\/span>p<\/span>><\/span>\r\n  <\/><\/span>\r\n);<\/span> \/\/\u975e\u540c\u671f\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u884c\u3046<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528\u51fd\u6570\u7ec4\u4ef6\u6765\u663e\u793aHelloWorld\u3002<\/h1>\n
import<\/span> {<\/span> createRoot<\/span> }<\/span> from<\/span> \"<\/span>react-dom\/client<\/span>\"<\/span>;<\/span> \/\/react-dom\/client\u304b\u3089creatRoot\u3092\u30a4\u30f3\u30dd\u30fc\u30c8(createRoot\u95a2\u6570\u304c\u5229\u7528\u53ef\u80fd\u3068\u306a\u308b)<\/span>\r\nimport<\/span> {<\/span> StrictMode<\/span> }<\/span> from<\/span> \"<\/span>react<\/span>\"<\/span>;<\/span> \/\/StrictMode\u3092\u30a4\u30f3\u30dd\u30fc\u30c8<\/span>\r\n\r\nconst<\/span> rootElement<\/span> =<\/span> document<\/span>.<\/span>getElementById<\/span>(<\/span>\"<\/span>root<\/span>\"<\/span>);<\/span> \/\/index.html\u306e<div id=\"root\"><\/div>\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u30a4\u30e1\u30fc\u30b8<\/span>\r\nconst<\/span> root<\/span> =<\/span> createRoot<\/span>(<\/span>rootElement<\/span>);<\/span> \r\n\r\nconst<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return<\/span>(<\/span> \/\/\u8907\u6570\u884c\u3092\u30ea\u30bf\u30fc\u30f3\u3059\u308b\u6642\u306f\u3001\u6539\u884c\u3057\u3066\uff08\uff09\u5185\u306b\u8a18\u8ff0\u3059\u308b\u3002<\/span>\r\n  <><\/span> {<\/span>\/*\/\/\u95a2\u6570\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068\u3057\u3066\u8fd4\u3059\u30bf\u30b0\u306f\u5927\u304d\u306a\u4e00\u3064\u306e\u30bf\u30b0\u306b\u3057\u306a\u3051\u3089\u3070\u306a\u3089\u306a\u3044,<React.Fragment>\u3092<><\/>\u3068\u3057\u3066\u7701\u7565\u3067\u304d\u308b*\/<\/span>}<\/span>\r\n    <<\/span>h1<\/span>><\/span>Hello World!<\/<\/span>h1<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>\u3044\u3068\u3063\u3061\u3067\u3059<\/<\/span>p<\/span>><\/span>\r\n  <\/><\/span>\r\n  )<\/span>\/\/App\u95a2\u6570\u306e\u7d50\u679c\u3068\u3057\u3066\u8868\u793a\u3057\u305f\u3044\u8981\u7d20\u3092\u8fd4\u5374\u3059\u308b<\/span>\r\n}<\/span>\r\n\r\nroot<\/span>.<\/span>render<\/span>(<\/span> \/\/\u975e\u540c\u671f\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3092\u884c\u3046<\/span>\r\n  <<\/span>StrictMode<\/span>><\/span> \r\n     <<\/span>App<\/span> \/><\/span> {<\/span>\/* App\u95a2\u6570\u306e\u7d50\u679c\uff08return\u3055\u308c\u305fHelloWorld\u3068\u3044\u3068\u3063\u3061\u304c\u8868\u793a\u3055\u308c\u308b\uff09 *\/<\/span>}<\/span>\r\n  <\/<\/span>StrictMode<\/span>><\/span>\r\n);<\/span> \/\/<StrictMode>\u3067\u3088\u308a\u53b3\u3057\u3044\u30eb\u30fc\u30eb\u3067\u8a18\u8ff0\u3092\u3059\u308b\u3053\u3068\u3092\u8a2d\u5b9a\u3001\u8b66\u544a\u3092\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/span>\r\n<\/code><\/pre>\n
\"image.png\"<\/div>\n
\u76ee\u524d\u6765\u770b\uff0c\u5982\u679c\u4e24\u8005\u90fd\u76f8\u540c\u7684\u8bdd\uff0c\u76f4\u63a5\u7f16\u5199\u7684\u4ee3\u7801\u53ef\u80fd\u66f4\u597d\uff0c\u4f46\u8003\u8651\u5230\u7ef4\u62a4\u6027\u548c\u53ef\u91cd\u7528\u6027\uff0c\u4f7f\u7528\u51fd\u6570\u7ec4\u4ef6\u7684\u65b9\u6cd5\u4f3c\u4e4e\u662f\u4e3b\u6d41\u3002
\n\u6b64\u5916\uff0c\u4ee5\u4e0b\u662fJSX\u8bed\u6cd5\u7684\u4e3b\u8981\u89c4\u5219\u3002<\/p>\n
JSX\u8a18\u6cd5\u7684\u89c4\u5219\u4e4b\u4e00\u662f\u5173\u4e8e\u51fd\u6570\u7ec4\u4ef6\u547d\u540d\u7684\u5b9a\u4e49\u3002<\/h1>\n
const App = () => {…\u51fd\u6570\u7ec4\u4ef6\u901a\u5e38\u4ee5\u5927\u5199\u5b57\u6bcd\u5f00\u5934\uff0c\u8fde\u63a5\u8bcd\u4e5f\u4ee5\u5927\u5199\u5b57\u6bcd\u5f00\u5934\u3002<\/p>\n
    const<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {...<\/span>\r\n    const<\/span> AppHoge<\/span> =<\/span> ()<\/span> =><\/span> {...<\/span>\r\n<\/code><\/pre>\n
JSX\u8a18\u6cd5\u7684\u89c4\u5219\u7b2c\u4e8c\u6761\u5173\u4e8ereturn\u7684\u89c4\u5b9a<\/h1>\n
\u5982\u679c\u8fd4\u56de\u7684\u662f\u5355\u884c\uff0c\u5219\u53ef\u4ee5\u7701\u7565”return”\u5173\u952e\u5b57\u3002<\/p>\n
const<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return<\/span> <<\/span>h1<\/span>><\/span>Hello World!<\/<\/span>h1<\/span>><\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u8fd4\u56de\u7684\u7ed3\u679c\u662f\u591a\u884c\uff0c\u5219\u5728\u62ec\u53f7\u5185\u6362\u884c\u5e76\u8bb0\u5f55\u3002<\/p>\n
const<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return<\/span>(<\/span> \r\n  <><\/span> \r\n    <<\/span>h1<\/span>><\/span>Hello World!<\/<\/span>h1<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>\u3044\u3068\u3063\u3061\u3067\u3059<\/<\/span>p<\/span>><\/span>\r\n  <\/><\/span>\r\n  )<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
JSX\u8bed\u6cd5\u7684\u89c4\u5219\u2462\u7247\u6bb5<\/h1>\n
\u5f53\u9700\u8981\u8fd4\u56de\u591a\u884c\u65f6\uff0c\u8bf7\u4f7f\u7528<>\u3001<\/p>\n
\n
\u6216\u5c06\u5b83\u4eec\u4f5c\u4e3a\u4e00\u4e2a\u5927\u7684\u5355\u4e00\u5143\u7d20\u8fd4\u56de\u3002<\/p>\n
\u5728\u4f7f\u7528<>\u65f6<\/p>\n
const<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return<\/span>(<\/span> \r\n  <><\/span> \u3000\r\n    <<\/span>h1<\/span>><\/span>Hello World!<\/<\/span>h1<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>\u3044\u3068\u3063\u3061\u3067\u3059<\/<\/span>p<\/span>><\/span>\r\n  <\/><\/span>\r\n  )<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4f7f\u7528<\/p>\n
\n
,<\/p>\n
const<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return<\/span>(<\/span> \r\n  <<\/span>div<\/span>><\/span> \u3000\r\n    <<\/span>h1<\/span>><\/span>Hello World!<\/<\/span>h1<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>\u3044\u3068\u3063\u3061\u3067\u3059<\/<\/span>p<\/span>><\/span>\r\n  <\/<\/span>div<\/span>><\/span>\r\n  )<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4f7f\u7528\u7684\u60c5\u51b5\u4e0b<\/p>\n
const<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return<\/span>(<\/span> \r\n  <><\/span> \u3000\r\n    <<\/span>h1<\/span>><\/span>Hello World!<\/<\/span>h1<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>\u3044\u3068\u3063\u3061\u3067\u3059<\/<\/span>p<\/span>><\/span>\r\n  <\/><\/span>\r\n  )<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
NG\u7684\u4e00\u4e2a\u4f8b\u5b50<\/p>\n
const<\/span> App<\/span> =<\/span> ()<\/span> =><\/span> {<\/span>\r\n  return<\/span>(<\/span> \r\n    <<\/span>h1<\/span>><\/span>Hello World!<\/<\/span>h1<\/span>><\/span>\r\n    <<\/span>p<\/span>><\/span>\u3044\u3068\u3063\u3061\u3067\u3059<\/<\/span>p<\/span>><\/span>\r\n  )<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8bf7\u53c2\u8003\u4ee5\u4e0b\u8d44\u6599<\/h1>\n
\u901a\u8fc7Udemy\u4ece\u57fa\u7840\u5b66\u8d77\u7684React\u5165\u95e8\uff0c\u4ee5\u907f\u514d\u5931\u53bb\u52a8\u529b<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
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