![\"gun](\"https:\/\/chat.openai.com\/_next\/image?url=https%3A%2F%2Flh3.googleusercontent.com%2Fa%2FAGNmyxbwVdnTP0E2eBqDrujRQjV-wFP12Thr4vFgysVv5A%3Ds96-c&w=64&q=75\")
<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91ca\u4ec0\u4e48\u662fJSX\uff1f<\/p>\n\n\n\n
JSX\u662f\u4e00\u79cdJavaScript\u8bed\u6cd5\u6269\u5c55\uff0c\u7528\u4e8e\u5728React\u4e2d\u63cf\u8ff0\u7528\u6237\u754c\u9762\u7684\u7ed3\u6784\u3002\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u4f7f\u7528\u7c7b\u4f3c\u4e8eHTML\u7684\u8bed\u6cd5\u6765\u6784\u5efaReact\u7ec4\u4ef6\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7Babel\u7b49\u5de5\u5177\u5c06JSX\u7f16\u8bd1\u4e3aJavaScript\u4ee3\u7801\u3002<\/p>\n\n\n\n
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jsxCopy codeimport React from 'react';\n\nfunction App() {\n return (\n <div>\n <h1>Hello, World!<\/h1>\n <p>This is a simple React component.<\/p>\n <\/div>\n );\n}\n\nexport default App;\n<\/code><\/pre>\n\n\n\n\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528JSX\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3aApp\u7684React\u7ec4\u4ef6\u3002\u8be5\u7ec4\u4ef6\u5305\u542b\u4e00\u4e2adiv\u5143\u7d20\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2ah1\u5143\u7d20\u548c\u4e00\u4e2ap\u5143\u7d20\u3002\u901a\u8fc7\u4f7f\u7528JSX\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u52a0\u76f4\u89c2\u5730\u63cf\u8ff0\u8fd9\u4e2a\u7ec4\u4ef6\u7684\u7ed3\u6784\uff0c\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u6613\u4e8e\u9605\u8bfb\u548c\u7ef4\u62a4\u3002<\/p>\n\n\n\n
\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0cJSX\u5e76\u4e0d\u662f\u5fc5\u9700\u7684\uff0cReact\u4e5f\u53ef\u4ee5\u4f7f\u7528\u7eafJavaScript\u6765\u63cf\u8ff0\u7ec4\u4ef6\u7684\u7ed3\u6784\u3002\u4f46\u662f\uff0c\u4f7f\u7528JSX\u53ef\u4ee5\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u6613\u4e8e\u9605\u8bfb\u548c\u7ef4\u62a4\uff0c\u56e0\u6b64\u5728React\u4e2d\uff0cJSX\u5df2\u7ecf\u6210\u4e3a\u4e86\u4e00\u79cd\u6807\u51c6\u7684\u63cf\u8ff0\u7ec4\u4ef6\u7ed3\u6784\u7684\u65b9\u5f0f\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caJSX\u8bed\u6cd5<\/p>\n\n\n\n
JSX\u8bed\u6cd5\u662f\u4e00\u79cdJavaScript\u7684\u8bed\u6cd5\u6269\u5c55\uff0c\u7528\u4e8e\u5728React\u4e2d\u63cf\u8ff0\u7528\u6237\u754c\u9762\u7684\u7ed3\u6784\u3002\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u4f7f\u7528\u7c7b\u4f3c\u4e8eHTML\u7684\u8bed\u6cd5\u6765\u6784\u5efaReact\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
JSX\u7684\u57fa\u672c\u8bed\u6cd5\u89c4\u5219\u5982\u4e0b\uff1a<\/p>\n\n\n\n
\n- \u4f7f\u7528\u5c16\u62ec\u53f7\uff08<>)\u6765\u5305\u88f9HTML\u6807\u8bb0\uff0c\u4f8b\u5982
<div><\/code>\u3001<p><\/code>\u7b49\u3002<\/li>\n\n\n\n- \u6807\u8bb0\u5fc5\u987b\u95ed\u5408\uff0c\u4f8b\u5982
<input><\/code>\u6807\u8bb0\u5fc5\u987b\u5199\u6210<input \/><\/code>\u6216\u8005<input><\/input><\/code>\u7684\u5f62\u5f0f\u3002<\/li>\n\n\n\n- \u53ef\u4ee5\u5728\u6807\u8bb0\u4e2d\u6dfb\u52a0\u5c5e\u6027\uff0c\u4f8b\u5982
<input type=\"text\" \/><\/code>\u3002<\/li>\n\n\n\n- \u53ef\u4ee5\u5728\u6807\u8bb0\u4e2d\u5d4c\u5957\u5176\u4ed6\u6807\u8bb0\uff0c\u4f8b\u5982
<div><p>Hello, World!<\/p><\/div><\/code>\u3002<\/li>\n\n\n\n- \u53ef\u4ee5\u5728\u6807\u8bb0\u4e2d\u5d4c\u5957JavaScript\u8868\u8fbe\u5f0f\uff0c\u4f7f\u7528\u82b1\u62ec\u53f7\uff08{}\uff09\u5305\u88f9\uff0c\u4f8b\u5982
<div>{1 + 2}<\/div><\/code>\u3002<\/li>\n\n\n\n- \u53ef\u4ee5\u4f7f\u7528\u53d8\u91cf\u3001\u51fd\u6570\u3001\u8868\u8fbe\u5f0f\u7b49\u52a8\u6001\u5730\u751f\u6210\u6807\u8bb0\u548c\u5c5e\u6027\uff0c\u4f8b\u5982
<input type={inputType} onChange={handleChange} \/><\/code>\u3002<\/li>\n<\/ol>\n\n\n\nJSX\u5728\u7f16\u8bd1\u65f6\u4f1a\u88ab\u8f6c\u6362\u4e3aJavaScript\u4ee3\u7801\uff0c\u4f8b\u5982\u4e0a\u9762\u63d0\u5230\u7684\u7ec4\u4ef6\u53ef\u4ee5\u88ab\u8f6c\u6362\u4e3a\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n\n\n\n
javascriptCopy codeReact.createElement(\"div\", null, \n React.createElement(\"h1\", null, \"Hello, World!\"), \n React.createElement(\"p\", null, \"This is a simple React component.\")\n);\n<\/code><\/pre>\n\n\n\n\u8fd9\u4e2aJavaScript\u4ee3\u7801\u8c03\u7528\u4e86React.createElement<\/code>\u65b9\u6cd5\u6765\u521b\u5efaReact\u5143\u7d20\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u8981\u521b\u5efa\u7684\u5143\u7d20\u7c7b\u578b\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u5143\u7d20\u7684\u5c5e\u6027\uff0c\u7b2c\u4e09\u4e2a\u4ee5\u53ca\u540e\u7eed\u53c2\u6570\u662f\u5143\u7d20\u7684\u5b50\u5143\u7d20\u3002<\/p>\n\n\n\n\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cJSX\u53ea\u662f\u4e00\u79cd\u8bed\u6cd5\u6269\u5c55\uff0cReact\u5e76\u4e0d\u4f9d\u8d56\u4e8eJSX\u6765\u5de5\u4f5c\u3002\u5f00\u53d1\u8005\u4e5f\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528JavaScript\u6765\u63cf\u8ff0React\u7ec4\u4ef6\uff0c\u4f46\u662f\u4f7f\u7528JSX\u53ef\u4ee5\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u76f4\u89c2\u3001\u6613\u8bfb\u548c\u6613\u7ef4\u62a4\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caJSX\u4e0eHTML\u7684\u5bf9\u6bd4<\/p>\n\n\n\n
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\n- \u5c5e\u6027\u540d\u79f0\u91c7\u7528\u9a7c\u5cf0\u5f0f\u547d\u540d\uff1a\u5728HTML\u4e2d\uff0c\u5c5e\u6027\u540d\u901a\u5e38\u91c7\u7528\u5c0f\u5199\u5b57\u6bcd\u52a0\u6a2a\u7ebf\u7684\u5f62\u5f0f\uff0c\u4f8b\u5982
class<\/code>\u548cdata-xxx<\/code>\uff0c\u800c\u5728JSX\u4e2d\uff0c\u5c5e\u6027\u540d\u91c7\u7528\u9a7c\u5cf0\u5f0f\u547d\u540d\uff0c\u4f8b\u5982className<\/code>\u548cdataXxx<\/code>\u3002\u8fd9\u662f\u56e0\u4e3a\u5728JavaScript\u4e2d\uff0c\u5c5e\u6027\u540d\u901a\u5e38\u91c7\u7528\u9a7c\u5cf0\u5f0f\u547d\u540d\u7684\u5f62\u5f0f\u3002<\/li>\n\n\n\n- \u6837\u5f0f\u5c5e\u6027\u91c7\u7528\u5bf9\u8c61\u7684\u5f62\u5f0f\uff1a\u5728HTML\u4e2d\uff0c\u6837\u5f0f\u901a\u5e38\u91c7\u7528\u5b57\u7b26\u4e32\u7684\u5f62\u5f0f\u76f4\u63a5\u4f5c\u4e3a\u5c5e\u6027\u503c\uff0c\u4f8b\u5982
<div style=\"color: red;\">Hello, World!<\/div><\/code>\u3002\u800c\u5728JSX\u4e2d\uff0c\u6837\u5f0f\u5c5e\u6027\u91c7\u7528JavaScript\u5bf9\u8c61\u7684\u5f62\u5f0f\uff0c\u4f8b\u5982<div style={{ color: 'red' }}>Hello, World!<\/div><\/code>\u3002\u8fd9\u662f\u56e0\u4e3a\u5728JavaScript\u4e2d\uff0c\u5bf9\u8c61\u662f\u4e00\u79cd\u975e\u5e38\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\u3002<\/li>\n\n\n\n- \u4f7f\u7528\u82b1\u62ec\u53f7\u8868\u793aJavaScript\u8868\u8fbe\u5f0f\uff1a\u5728JSX\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u82b1\u62ec\u53f7\uff08{}\uff09\u6765\u5d4c\u5165JavaScript\u8868\u8fbe\u5f0f\uff0c\u4f8b\u5982
<div>{1 + 2}<\/div><\/code>\u3002\u800c\u5728HTML\u4e2d\uff0c\u4e0d\u652f\u6301\u5d4c\u5165JavaScript\u8868\u8fbe\u5f0f\u3002<\/li>\n\n\n\n- \u5143\u7d20\u548c\u7ec4\u4ef6\u540d\u79f0\u9700\u8981\u9996\u5b57\u6bcd\u5927\u5199\uff1a\u5728JSX\u4e2d\uff0c\u5143\u7d20\u548c\u7ec4\u4ef6\u7684\u540d\u79f0\u5fc5\u987b\u4ee5\u5927\u5199\u5b57\u6bcd\u5f00\u5934\uff0c\u4f8b\u5982
<div><\/code>\u548c<Button><\/code>\u3002\u800c\u5728HTML\u4e2d\uff0c\u5143\u7d20\u548c\u7ec4\u4ef6\u7684\u540d\u79f0\u53ef\u4ee5\u662f\u5c0f\u5199\u5b57\u6bcd\uff0c\u4f8b\u5982<div><\/code>\u548c<button><\/code>\u3002<\/li>\n<\/ol>\n\n\n\n\u603b\u7684\u6765\u8bf4\uff0cJSX\u8bed\u6cd5\u4e0eHTML\u975e\u5e38\u76f8\u4f3c\uff0c\u4f46\u662f\u5b83\u66f4\u52a0\u9002\u5408\u5728React\u4e2d\u4f7f\u7528\uff0c\u56e0\u4e3a\u5b83\u91c7\u7528\u4e86\u4e00\u4e9bJavaScript\u7684\u8bed\u8a00\u7279\u6027\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e86\u66f4\u52a0\u76f4\u89c2\u3001\u6613\u8bfb\u548c\u6613\u7ef4\u62a4\u7684\u8bed\u6cd5\u6765\u63cf\u8ff0React\u7ec4\u4ef6\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91ca\u4ec0\u4e48\u662fReact\u7ec4\u4ef6\uff1f<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u7ec4\u4ef6\u662f\u4e00\u79cd\u7528\u4e8e\u6784\u5efaUI\u754c\u9762\u7684\u72ec\u7acb\u5355\u5143\uff0c\u5b83\u53ef\u4ee5\u770b\u4f5c\u662f\u4e00\u4e2a\u51fd\u6570\u6216\u8005\u4e00\u4e2a\u7c7b\uff0c\u7528\u4e8e\u5c01\u88c5\u548c\u62bd\u8c61UI\u5143\u7d20\u53ca\u5176\u884c\u4e3a\u3002<\/p>\n\n\n\n
\u7ec4\u4ef6\u901a\u5e38\u5206\u4e3a\u4e24\u79cd\u7c7b\u578b\uff1a\u51fd\u6570\u7ec4\u4ef6\u548c\u7c7b\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
\u51fd\u6570\u7ec4\u4ef6\u662f\u4e00\u79cd\u6700\u7b80\u5355\u7684\u7ec4\u4ef6\u5f62\u5f0f\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2aprops\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\uff0c\u8fd4\u56de\u4e00\u4e2aReact\u5143\u7d20\u6216\u8005\u4e00\u7ec4React\u5143\u7d20\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
jsxCopy codefunction MyComponent(props) {\n return <div>Hello, {props.name}!<\/div>;\n}\n<\/code><\/pre>\n\n\n\n\u7c7b\u7ec4\u4ef6\u662f\u4e00\u79cd\u57fa\u4e8eES6 class\u7684\u7ec4\u4ef6\u5f62\u5f0f\uff0c\u5b83\u7ee7\u627f\u81eaReact.Component\u7c7b\uff0c\u5fc5\u987b\u5b9e\u73b0render()\u65b9\u6cd5\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7state\u5bf9\u8c61\u6765\u7ba1\u7406\u5185\u90e8\u72b6\u6001\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
jsxCopy codeclass MyComponent extends React.Component {\n constructor(props) {\n super(props);\n this.state = { count: 0 };\n }\n\n handleClick() {\n this.setState({ count: this.state.count + 1 });\n }\n\n render() {\n return (\n <div>\n <p>You clicked {this.state.count} times.<\/p>\n <button onClick={() => this.handleClick()}>Click me<\/button>\n <\/div>\n );\n }\n}\n<\/code><\/pre>\n\n\n\n\u5728React\u4e2d\uff0c\u7ec4\u4ef6\u53ef\u4ee5\u901a\u8fc7props\u5bf9\u8c61\u548cstate\u5bf9\u8c61\u6765\u63a5\u6536\u548c\u7ba1\u7406\u6570\u636e\uff0c\u901a\u8fc7\u4e8b\u4ef6\u548c\u65b9\u6cd5\u6765\u5904\u7406\u7528\u6237\u4ea4\u4e92\u548c\u72b6\u6001\u53d8\u5316\u3002\u7ec4\u4ef6\u4e5f\u53ef\u4ee5\u5d4c\u5957\u548c\u7ec4\u5408\uff0c\u4ece\u800c\u6784\u5efa\u51fa\u66f4\u52a0\u590d\u6742\u548c\u7075\u6d3b\u7684UI\u754c\u9762\u3002\u7531\u4e8e\u7ec4\u4ef6\u5177\u6709\u826f\u597d\u7684\u5c01\u88c5\u6027\u548c\u590d\u7528\u6027\uff0c\u56e0\u6b64\u5728React\u5f00\u53d1\u4e2d\uff0c\u7ec4\u4ef6\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u548c\u57fa\u7840\u7684\u6982\u5ff5\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u7ec4\u4ef6\u7684\u7c7b\u578b<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u7ec4\u4ef6\u901a\u5e38\u5206\u4e3a\u4e24\u79cd\u7c7b\u578b\uff1a\u51fd\u6570\u7ec4\u4ef6\u548c\u7c7b\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
\n- \u51fd\u6570\u7ec4\u4ef6<\/li>\n<\/ol>\n\n\n\n
\u51fd\u6570\u7ec4\u4ef6\u662f\u6700\u7b80\u5355\u7684\u7ec4\u4ef6\u5f62\u5f0f\uff0c\u5b83\u53ea\u662f\u4e00\u4e2aJavaScript\u51fd\u6570\uff0c\u7528\u4e8e\u63a5\u6536props\u4f5c\u4e3a\u53c2\u6570\u5e76\u8fd4\u56de\u4e00\u4e2aReact\u5143\u7d20\u3002\u51fd\u6570\u7ec4\u4ef6\u901a\u5e38\u7528\u4e8e\u5c55\u793a\u7b80\u5355\u7684UI\u754c\u9762\uff0c\u4f8b\u5982\u5c55\u793a\u4e00\u6bb5\u6587\u672c\u3001\u56fe\u7247\u7b49\u3002\u51fd\u6570\u7ec4\u4ef6\u6ca1\u6709\u5185\u90e8\u72b6\u6001\uff0c\u4e5f\u6ca1\u6709\u751f\u547d\u5468\u671f\u65b9\u6cd5\uff0c\u56e0\u6b64\u5b83\u7684\u6027\u80fd\u76f8\u5bf9\u8f83\u9ad8\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
jsxCopy codefunction Hello(props) {\n return <div>Hello, {props.name}!<\/div>;\n}\n<\/code><\/pre>\n\n\n\n\n- \u7c7b\u7ec4\u4ef6<\/li>\n<\/ol>\n\n\n\n
\u7c7b\u7ec4\u4ef6\u662f\u4e00\u79cd\u57fa\u4e8eES6 class\u7684\u7ec4\u4ef6\u5f62\u5f0f\uff0c\u5b83\u7ee7\u627f\u81eaReact.Component\u7c7b\uff0c\u5fc5\u987b\u5b9e\u73b0render()\u65b9\u6cd5\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7state\u5bf9\u8c61\u6765\u7ba1\u7406\u5185\u90e8\u72b6\u6001\u3002\u7c7b\u7ec4\u4ef6\u901a\u5e38\u7528\u4e8e\u5b9e\u73b0\u5177\u6709\u590d\u6742\u4ea4\u4e92\u903b\u8f91\u7684UI\u7ec4\u4ef6\uff0c\u4f8b\u5982\u8868\u5355\u3001\u6a21\u6001\u6846\u7b49\u3002\u7c7b\u7ec4\u4ef6\u6709\u81ea\u5df1\u7684\u5185\u90e8\u72b6\u6001\uff0c\u53ef\u4ee5\u901a\u8fc7setState()\u65b9\u6cd5\u6765\u66f4\u65b0\u72b6\u6001\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u751f\u547d\u5468\u671f\u65b9\u6cd5\u4e2d\u5904\u7406\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\u4e8b\u4ef6\uff0c\u4f8b\u5982\u7ec4\u4ef6\u88ab\u6302\u8f7d\u3001\u66f4\u65b0\u3001\u5378\u8f7d\u7b49\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
jsxCopy codeclass Counter extends React.Component {\n constructor(props) {\n super(props);\n this.state = { count: 0 };\n }\n\n handleClick() {\n this.setState({ count: this.state.count + 1 });\n }\n\n render() {\n return (\n <div>\n <p>You clicked {this.state.count} times.<\/p>\n <button onClick={() => this.handleClick()}>Click me<\/button>\n <\/div>\n );\n }\n}\n<\/code><\/pre>\n\n\n\n\u9664\u4e86\u8fd9\u4e24\u79cd\u57fa\u672c\u7c7b\u578b\u7684\u7ec4\u4ef6\uff0cReact\u8fd8\u652f\u6301\u4e00\u4e9b\u7279\u6b8a\u7c7b\u578b\u7684\u7ec4\u4ef6\uff0c\u4f8b\u5982\u7eaf\u7ec4\u4ef6\uff08Pure Component\uff09\u548c\u9ad8\u9636\u7ec4\u4ef6\uff08Higher-order Component\uff09\uff0c\u5b83\u4eec\u90fd\u5177\u6709\u7279\u6b8a\u7684\u7528\u9014\u548c\u7279\u70b9\u3002\u7eaf\u7ec4\u4ef6\u662f\u4e00\u79cd\u4f18\u5316\u6027\u80fd\u7684\u65b9\u5f0f\uff0c\u5b83\u4eec\u5728shouldComponentUpdate()\u65b9\u6cd5\u4e2d\u6267\u884c\u4e86\u4e00\u4e9b\u6d45\u6bd4\u8f83\uff0c\u53ef\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684UI\u91cd\u7ed8\u3002\u9ad8\u9636\u7ec4\u4ef6\u662f\u4e00\u79cd\u590d\u7528\u903b\u8f91\u7684\u65b9\u5f0f\uff0c\u5b83\u4eec\u63a5\u53d7\u4e00\u4e2a\u7ec4\u4ef6\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u7ec4\u4ef6\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e9b\u901a\u7528\u7684\u529f\u80fd\uff0c\u4f8b\u5982\u65e5\u5fd7\u8bb0\u5f55\u3001\u6743\u9650\u63a7\u5236\u7b49\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91ca\u5982\u4f55\u521b\u5efaReact\u7ec4\u4ef6<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u521b\u5efa\u7ec4\u4ef6\u6709\u4e24\u79cd\u57fa\u672c\u65b9\u5f0f\uff1a\u51fd\u6570\u7ec4\u4ef6\u548c\u7c7b\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
\n- \u51fd\u6570\u7ec4\u4ef6<\/li>\n<\/ol>\n\n\n\n
\u51fd\u6570\u7ec4\u4ef6\u662f\u6700\u7b80\u5355\u7684\u7ec4\u4ef6\u5f62\u5f0f\uff0c\u5b83\u53ea\u662f\u4e00\u4e2aJavaScript\u51fd\u6570\uff0c\u7528\u4e8e\u63a5\u6536props\u4f5c\u4e3a\u53c2\u6570\u5e76\u8fd4\u56de\u4e00\u4e2aReact\u5143\u7d20\u3002\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\u7ec4\u4ef6\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\uff0c\u7136\u540e\u5728\u51fd\u6570\u4e2d\u8fd4\u56de\u4e00\u4e2aReact\u5143\u7d20\u5373\u53ef\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
jsxCopy codefunction Hello(props) {\n return <div>Hello, {props.name}!<\/div>;\n}\n<\/code><\/pre>\n\n\n\n\u8fd9\u4e2a\u51fd\u6570\u7ec4\u4ef6\u63a5\u6536\u4e00\u4e2aprops\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\uff0c\u7136\u540e\u8fd4\u56de\u4e00\u4e2a\u5305\u542bprops\u4e2d\u6570\u636e\u7684React\u5143\u7d20\u3002<\/p>\n\n\n\n
\n- \u7c7b\u7ec4\u4ef6<\/li>\n<\/ol>\n\n\n\n
\u7c7b\u7ec4\u4ef6\u662f\u4e00\u79cd\u57fa\u4e8eES6 class\u7684\u7ec4\u4ef6\u5f62\u5f0f\uff0c\u5b83\u7ee7\u627f\u81eaReact.Component\u7c7b\uff0c\u5fc5\u987b\u5b9e\u73b0render()\u65b9\u6cd5\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7state\u5bf9\u8c61\u6765\u7ba1\u7406\u5185\u90e8\u72b6\u6001\u3002\u521b\u5efa\u4e00\u4e2a\u7c7b\u7ec4\u4ef6\u4e5f\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u7ee7\u627f\u81eaReact.Component\u7684\u7c7b\uff0c\u7136\u540e\u5b9e\u73b0render()\u65b9\u6cd5\u5373\u53ef\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
jsxCopy codeclass Counter extends React.Component {\n constructor(props) {\n super(props);\n this.state = { count: 0 };\n }\n\n handleClick() {\n this.setState({ count: this.state.count + 1 });\n }\n\n render() {\n return (\n <div>\n <p>You clicked {this.state.count} times.<\/p>\n <button onClick={() => this.handleClick()}>Click me<\/button>\n <\/div>\n );\n }\n}\n<\/code><\/pre>\n\n\n\n\u8fd9\u4e2a\u7c7b\u7ec4\u4ef6\u7ef4\u62a4\u4e86\u4e00\u4e2acount\u72b6\u6001\u53d8\u91cf\uff0c\u5e76\u4e14\u5b9e\u73b0\u4e86\u4e00\u4e2ahandleClick()\u65b9\u6cd5\u7528\u4e8e\u66f4\u65b0count\u72b6\u6001\u3002\u5728render()\u65b9\u6cd5\u4e2d\uff0c\u5b83\u8fd4\u56de\u4e00\u4e2a\u5305\u542bcount\u6570\u636e\u7684React\u5143\u7d20\uff0c\u5e76\u4e14\u7ed9\u6309\u94ae\u7ed1\u5b9a\u4e86\u4e00\u4e2a\u70b9\u51fb\u4e8b\u4ef6\u3002<\/p>\n\n\n\n
\n- \u7ec4\u4ef6\u7684\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n
\u521b\u5efa\u5b8c\u7ec4\u4ef6\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u5176\u4ed6\u5730\u65b9\u4f7f\u7528\u5b83\u4eec\u3002\u4f7f\u7528\u7ec4\u4ef6\u7684\u65b9\u5f0f\u7c7b\u4f3c\u4e8e\u4f7f\u7528HTML\u6807\u7b7e\uff0c\u53ea\u9700\u8981\u5c06\u7ec4\u4ef6\u540d\u79f0\u4f5c\u4e3a\u6807\u7b7e\u540d\uff0c\u7136\u540e\u5c06\u7ec4\u4ef6\u9700\u8981\u7684\u5c5e\u6027\u4ee5\u6807\u7b7e\u5c5e\u6027\u7684\u65b9\u5f0f\u4f20\u9012\u5373\u53ef\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
jsxCopy codeReactDOM.render(\n <div>\n <Hello name=\"Alice\" \/>\n <Hello name=\"Bob\" \/>\n <Counter \/>\n <\/div>,\n document.getElementById(\"root\")\n);\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u5305\u542b\u4e09\u4e2a\u7ec4\u4ef6\u7684React\u5143\u7d20\u6811\uff0c\u5e76\u4e14\u5c06\u5b83\u4eec\u6e32\u67d3\u5230\u9875\u9762\u4e0a\u3002\u5176\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e24\u4e2aHello\u7ec4\u4ef6\u548c\u4e00\u4e2aCounter\u7ec4\u4ef6\uff0c\u5e76\u4e14\u7ed9\u5b83\u4eec\u4f20\u9012\u4e86\u4e0d\u540c\u7684\u5c5e\u6027\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\u662f\u6307\u7ec4\u4ef6\u4ece\u88ab\u521b\u5efa\u5230\u88ab\u9500\u6bc1\u7684\u6574\u4e2a\u8fc7\u7a0b\u4e2d\u6240\u7ecf\u5386\u7684\u4e00\u7cfb\u5217\u9636\u6bb5\u3002\u6bcf\u4e2a\u9636\u6bb5\u90fd\u6709\u5bf9\u5e94\u7684\u65b9\u6cd5\u53ef\u4ee5\u88ab\u8c03\u7528\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5728\u8fd9\u4e9b\u65b9\u6cd5\u4e2d\u6267\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\uff0c\u4ee5\u6ee1\u8db3\u7ec4\u4ef6\u7684\u4e1a\u52a1\u9700\u6c42\u3002React\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\u53ef\u4ee5\u5206\u4e3a\u4e09\u4e2a\u9636\u6bb5\uff1a\u6302\u8f7d\u3001\u66f4\u65b0\u548c\u5378\u8f7d\u3002<\/p>\n\n\n\n
\n- \u6302\u8f7d\u9636\u6bb5<\/li>\n<\/ol>\n\n\n\n
\u5f53\u7ec4\u4ef6\u7b2c\u4e00\u6b21\u88ab\u521b\u5efa\u5e76\u6dfb\u52a0\u5230DOM\u4e2d\u65f6\uff0c\u4f1a\u4f9d\u6b21\u8c03\u7528\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
\n- constructor(props): \u7ec4\u4ef6\u7684\u6784\u9020\u51fd\u6570\uff0c\u5728\u8fd9\u91cc\u53ef\u4ee5\u521d\u59cb\u5316state\u548c\u7ed1\u5b9a\u4e8b\u4ef6\u5904\u7406\u65b9\u6cd5\u3002<\/li>\n\n\n\n
- static getDerivedStateFromProps(props, state): \u5728\u7ec4\u4ef6\u6302\u8f7d\u4e4b\u524d\u8c03\u7528\uff0c\u5b83\u7684\u8fd4\u56de\u503c\u5c06\u88ab\u8bbe\u7f6e\u5230\u7ec4\u4ef6\u7684state\u4e2d\uff0c\u901a\u5e38\u7528\u4e8e\u6839\u636eprops\u8ba1\u7b97\u51fastate\u3002<\/li>\n\n\n\n
- render(): \u6e32\u67d3\u7ec4\u4ef6\uff0c\u8fd4\u56de\u4e00\u4e2aReact\u5143\u7d20\u3002<\/li>\n\n\n\n
- componentDidMount(): \u7ec4\u4ef6\u6302\u8f7d\u5b8c\u6210\uff0c\u53ef\u4ee5\u5728\u8fd9\u91cc\u8fdb\u884cDOM\u64cd\u4f5c\u6216\u53d1\u9001\u7f51\u7edc\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n\n\n\n
\n- \u66f4\u65b0\u9636\u6bb5<\/li>\n<\/ol>\n\n\n\n
\u5f53\u7ec4\u4ef6\u7684props\u6216state\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u4f1a\u4f9d\u6b21\u8c03\u7528\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
\n- static getDerivedStateFromProps(props, state): \u5728\u7ec4\u4ef6\u6302\u8f7d\u4e4b\u540e\u548c\u66f4\u65b0\u4e4b\u524d\u8c03\u7528\uff0c\u5b83\u7684\u8fd4\u56de\u503c\u5c06\u88ab\u8bbe\u7f6e\u5230\u7ec4\u4ef6\u7684state\u4e2d\uff0c\u901a\u5e38\u7528\u4e8e\u6839\u636eprops\u8ba1\u7b97\u51fastate\u3002<\/li>\n\n\n\n
- shouldComponentUpdate(nextProps, nextState): \u7ec4\u4ef6\u662f\u5426\u5e94\u8be5\u66f4\u65b0\uff0c\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\u3002\u5728\u8fd9\u91cc\u53ef\u4ee5\u6839\u636eprops\u548cstate\u7684\u53d8\u5316\u6765\u5224\u65ad\u662f\u5426\u9700\u8981\u66f4\u65b0\u7ec4\u4ef6\uff0c\u4f18\u5316\u7ec4\u4ef6\u7684\u6027\u80fd\u3002<\/li>\n\n\n\n
- render(): \u6e32\u67d3\u7ec4\u4ef6\uff0c\u8fd4\u56de\u4e00\u4e2aReact\u5143\u7d20\u3002<\/li>\n\n\n\n
- getSnapshotBeforeUpdate(prevProps, prevState): \u5728\u7ec4\u4ef6\u66f4\u65b0\u4e4b\u524d\u8c03\u7528\uff0c\u7528\u4e8e\u83b7\u53d6\u7ec4\u4ef6\u66f4\u65b0\u524d\u7684\u5feb\u7167\uff0c\u901a\u5e38\u7528\u4e8e\u5728\u7ec4\u4ef6\u66f4\u65b0\u540e\u6062\u590d\u6eda\u52a8\u4f4d\u7f6e\u7b49\u72b6\u6001\u3002<\/li>\n\n\n\n
- componentDidUpdate(prevProps, prevState, snapshot): \u7ec4\u4ef6\u66f4\u65b0\u5b8c\u6210\uff0c\u53ef\u4ee5\u5728\u8fd9\u91cc\u8fdb\u884cDOM\u64cd\u4f5c\u6216\u53d1\u9001\u7f51\u7edc\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n\n\n\n
\n- \u5378\u8f7d\u9636\u6bb5<\/li>\n<\/ol>\n\n\n\n
\u5f53\u7ec4\u4ef6\u88ab\u4eceDOM\u4e2d\u79fb\u9664\u65f6\uff0c\u4f1a\u8c03\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
\n- componentWillUnmount(): \u7ec4\u4ef6\u5373\u5c06\u88ab\u5378\u8f7d\uff0c\u53ef\u4ee5\u5728\u8fd9\u91cc\u8fdb\u884c\u4e00\u4e9b\u6e05\u7406\u64cd\u4f5c\uff0c\u5982\u6e05\u9664\u5b9a\u65f6\u5668\u3001\u53d6\u6d88\u7f51\u7edc\u8bf7\u6c42\u7b49\u3002<\/li>\n<\/ul>\n\n\n\n
\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u4e1a\u52a1\u9700\u6c42\u6765\u91cd\u5199\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u4ee5\u6ee1\u8db3\u81ea\u5df1\u7684\u4e1a\u52a1\u9700\u6c42\u3002\u540c\u65f6\uff0cReact\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u9ad8\u7ea7\u7684\u751f\u547d\u5468\u671f\u65b9\u6cd5\uff0c\u5982getSnapshotBeforeUpdate()\u548cgetDerivedStateFromError()\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u5904\u7406\u4e00\u4e9b\u8f83\u4e3a\u590d\u6742\u7684\u4e1a\u52a1\u573a\u666f\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u4e2d\u4ec0\u4e48\u662fProps\u548cState<\/p>\n\n\n\n
\u5728React\u4e2d\uff0cprops\u548cstate\u662f\u7ec4\u4ef6\u7684\u4e24\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u7528\u4e8e\u63cf\u8ff0\u7ec4\u4ef6\u7684\u6570\u636e\u548c\u72b6\u6001\u3002\u867d\u7136\u5b83\u4eec\u90fd\u5305\u542b\u4e86\u7ec4\u4ef6\u6570\u636e\uff0c\u4f46\u662f\u5b83\u4eec\u7684\u542b\u4e49\u548c\u7528\u6cd5\u6709\u6240\u4e0d\u540c\u3002<\/p>\n\n\n\n
\n- Props<\/li>\n<\/ol>\n\n\n\n
Props\u662f\u7ec4\u4ef6\u7684\u5c5e\u6027\uff0c\u5b83\u662f\u7531\u7236\u7ec4\u4ef6\u5411\u5b50\u7ec4\u4ef6\u4f20\u9012\u7684\uff0c\u7528\u4e8e\u63cf\u8ff0\u7ec4\u4ef6\u7684\u8f93\u5165\u6570\u636e\u3002\u7236\u7ec4\u4ef6\u53ef\u4ee5\u901a\u8fc7props\u5411\u5b50\u7ec4\u4ef6\u4f20\u9012\u4efb\u4f55\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u57fa\u672c\u7c7b\u578b\u3001\u5bf9\u8c61\u3001\u6570\u7ec4\u7b49\u3002<\/p>\n\n\n\n
\u5728\u5b50\u7ec4\u4ef6\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7this.props\u6765\u8bbf\u95eeprops\u4e2d\u7684\u6570\u636e\u3002\u5b50\u7ec4\u4ef6\u53ef\u4ee5\u8bfb\u53d6props\u7684\u503c\uff0c\u4f46\u662f\u4e0d\u80fd\u76f4\u63a5\u4fee\u6539props\u7684\u503c\uff0c\u56e0\u4e3aprops\u662f\u53ea\u8bfb\u7684\u3002\u5982\u679c\u9700\u8981\u4fee\u6539props\u4e2d\u7684\u6570\u636e\uff0c\u9700\u8981\u901a\u8fc7\u7236\u7ec4\u4ef6\u6765\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n\n\n\n
\n- State<\/li>\n<\/ol>\n\n\n\n
State\u662f\u7ec4\u4ef6\u7684\u72b6\u6001\uff0c\u5b83\u662f\u7ec4\u4ef6\u5185\u90e8\u7684\u6570\u636e\uff0c\u7528\u4e8e\u63cf\u8ff0\u7ec4\u4ef6\u7684\u72b6\u6001\u53d8\u5316\u3002\u6bcf\u4e2a\u7ec4\u4ef6\u90fd\u6709\u81ea\u5df1\u7684state\uff0c\u5f53\u7ec4\u4ef6\u7684\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff0cReact\u4f1a\u81ea\u52a8\u91cd\u65b0\u6e32\u67d3\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
\u5728\u7ec4\u4ef6\u5185\u90e8\uff0c\u53ef\u4ee5\u901a\u8fc7this.state\u6765\u8bbf\u95ee\u7ec4\u4ef6\u7684state\u3002\u53ef\u4ee5\u901a\u8fc7this.setState()\u65b9\u6cd5\u6765\u4fee\u6539\u7ec4\u4ef6\u7684\u72b6\u6001\u3002this.setState()\u65b9\u6cd5\u4f1a\u5408\u5e76\u65b0\u65e7\u72b6\u6001\uff0c\u5e76\u89e6\u53d1\u7ec4\u4ef6\u7684\u91cd\u65b0\u6e32\u67d3\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7531\u4e8esetState()\u65b9\u6cd5\u662f\u5f02\u6b65\u7684\uff0c\u6240\u4ee5\u4e0d\u80fd\u5728\u8c03\u7528setState()\u65b9\u6cd5\u540e\u7acb\u5373\u8bfb\u53d6this.state\u7684\u503c\uff0c\u5426\u5219\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e0d\u6b63\u786e\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u7ec4\u4ef6\u7684props\u548cstate\u90fd\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u5b83\u4eec\u7684\u503c\u4e00\u65e6\u786e\u5b9a\uff0c\u5c31\u4e0d\u80fd\u76f4\u63a5\u4fee\u6539\u3002\u5982\u679c\u9700\u8981\u4fee\u6539\u7ec4\u4ef6\u7684\u6570\u636e\uff0c\u9700\u8981\u901a\u8fc7setState()\u65b9\u6cd5\u6765\u8fdb\u884c\u4fee\u6539\uff0c\u5e76\u89e6\u53d1\u7ec4\u4ef6\u7684\u91cd\u65b0\u6e32\u67d3\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caProps\u548cState\u7684\u533a\u522b<\/p>\n\n\n\n
\u5728React\u4e2d\uff0cprops\u548cstate\u90fd\u662f\u7ec4\u4ef6\u7684\u6570\u636e\uff0c\u4f46\u662f\u5b83\u4eec\u7684\u542b\u4e49\u548c\u7528\u6cd5\u6709\u6240\u4e0d\u540c\uff0c\u4e3b\u8981\u533a\u522b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
\n- \u5b9a\u4e49<\/li>\n<\/ol>\n\n\n\n
props\u662f\u7531\u7236\u7ec4\u4ef6\u5411\u5b50\u7ec4\u4ef6\u4f20\u9012\u7684\u5c5e\u6027\uff0c\u7528\u4e8e\u63cf\u8ff0\u7ec4\u4ef6\u7684\u8f93\u5165\u6570\u636e\u3002props\u662f\u53ea\u8bfb\u7684\uff0c\u4e0d\u80fd\u5728\u5b50\u7ec4\u4ef6\u5185\u90e8\u76f4\u63a5\u4fee\u6539\u3002\u7236\u7ec4\u4ef6\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u81ea\u5df1\u7684state\u6765\u4f20\u9012\u65b0\u7684props\u3002<\/p>\n\n\n\n
state\u662f\u7ec4\u4ef6\u5185\u90e8\u7684\u72b6\u6001\uff0c\u7528\u4e8e\u63cf\u8ff0\u7ec4\u4ef6\u7684\u72b6\u6001\u53d8\u5316\u3002\u6bcf\u4e2a\u7ec4\u4ef6\u90fd\u6709\u81ea\u5df1\u7684state\uff0c\u5f53\u7ec4\u4ef6\u7684\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff0cReact\u4f1a\u81ea\u52a8\u91cd\u65b0\u6e32\u67d3\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
\n- \u6570\u636e\u6765\u6e90<\/li>\n<\/ol>\n\n\n\n
props\u7684\u6570\u636e\u6765\u6e90\u662f\u7236\u7ec4\u4ef6\uff0c\u662f\u7531\u7236\u7ec4\u4ef6\u5411\u5b50\u7ec4\u4ef6\u4f20\u9012\u7684\u3002\u7236\u7ec4\u4ef6\u53ef\u4ee5\u901a\u8fc7props\u5411\u5b50\u7ec4\u4ef6\u4f20\u9012\u4efb\u4f55\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u57fa\u672c\u7c7b\u578b\u3001\u5bf9\u8c61\u3001\u6570\u7ec4\u7b49\u3002<\/p>\n\n\n\n
state\u7684\u6570\u636e\u6765\u6e90\u662f\u7ec4\u4ef6\u5185\u90e8\uff0c\u662f\u5728\u7ec4\u4ef6\u5185\u90e8\u5b9a\u4e49\u7684\uff0c\u7528\u4e8e\u63cf\u8ff0\u7ec4\u4ef6\u7684\u72b6\u6001\u53d8\u5316\u3002\u53ef\u4ee5\u901a\u8fc7this.state\u6765\u8bbf\u95ee\u7ec4\u4ef6\u7684state\u3002<\/p>\n\n\n\n
\n- \u53ef\u53d8\u6027<\/li>\n<\/ol>\n\n\n\n
props\u662f\u53ea\u8bfb\u7684\uff0c\u4e0d\u80fd\u5728\u5b50\u7ec4\u4ef6\u5185\u90e8\u76f4\u63a5\u4fee\u6539\uff0c\u53ea\u80fd\u7531\u7236\u7ec4\u4ef6\u4f20\u9012\u65b0\u7684props\u3002<\/p>\n\n\n\n
state\u662f\u53ef\u53d8\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7setState()\u65b9\u6cd5\u6765\u4fee\u6539\u7ec4\u4ef6\u7684\u72b6\u6001\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7531\u4e8esetState()\u65b9\u6cd5\u662f\u5f02\u6b65\u7684\uff0c\u6240\u4ee5\u4e0d\u80fd\u5728\u8c03\u7528setState()\u65b9\u6cd5\u540e\u7acb\u5373\u8bfb\u53d6this.state\u7684\u503c\uff0c\u5426\u5219\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e0d\u6b63\u786e\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n
\n- \u5f71\u54cd\u8303\u56f4<\/li>\n<\/ol>\n\n\n\n
props\u7684\u4f5c\u7528\u8303\u56f4\u662f\u4ece\u7236\u7ec4\u4ef6\u5411\u4e0b\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\uff0c\u5b50\u7ec4\u4ef6\u65e0\u6cd5\u4fee\u6539props\u3002<\/p>\n\n\n\n
state\u7684\u4f5c\u7528\u8303\u56f4\u662f\u7ec4\u4ef6\u5185\u90e8\uff0c\u53ea\u80fd\u7531\u7ec4\u4ef6\u81ea\u5df1\u6765\u4fee\u6539state\u3002<\/p>\n\n\n\n
\n- \u7528\u9014<\/li>\n<\/ol>\n\n\n\n
props\u7528\u4e8e\u7ec4\u4ef6\u95f4\u7684\u6570\u636e\u4f20\u9012\uff0c\u53ef\u4ee5\u5c06\u7236\u7ec4\u4ef6\u7684\u6570\u636e\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\uff0c\u5b9e\u73b0\u7ec4\u4ef6\u7684\u590d\u7528\u3002<\/p>\n\n\n\n
state\u7528\u4e8e\u7ec4\u4ef6\u5185\u90e8\u7684\u72b6\u6001\u7ba1\u7406\uff0c\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u72b6\u6001\u6e32\u67d3\u4e0d\u540c\u7684UI\uff0c\u5b9e\u73b0\u7ec4\u4ef6\u7684\u4ea4\u4e92\u6548\u679c\u3002<\/p>\n\n\n\n
\u603b\u7684\u6765\u8bf4\uff0cprops\u548cstate\u90fd\u662fReact\u7ec4\u4ef6\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u5b83\u4eec\u5206\u522b\u7528\u4e8e\u7ec4\u4ef6\u95f4\u7684\u6570\u636e\u4f20\u9012\u548c\u7ec4\u4ef6\u5185\u90e8\u7684\u72b6\u6001\u7ba1\u7406\uff0c\u5177\u6709\u4e0d\u540c\u7684\u7279\u70b9\u548c\u7528\u9014\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u6765\u9009\u62e9\u4f7f\u7528\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caProps\u548cState\u7684\u66f4\u65b0<\/p>\n\n\n\n
\u5728React\u4e2d\uff0cprops\u548cstate\u90fd\u53ef\u4ee5\u88ab\u66f4\u65b0\uff0c\u4f46\u662f\u66f4\u65b0\u7684\u65b9\u5f0f\u548c\u6548\u679c\u6709\u6240\u4e0d\u540c\u3002<\/p>\n\n\n\n
\n- Props\u7684\u66f4\u65b0<\/li>\n<\/ol>\n\n\n\n
props\u662f\u7531\u7236\u7ec4\u4ef6\u5411\u5b50\u7ec4\u4ef6\u4f20\u9012\u7684\u5c5e\u6027\uff0c\u7236\u7ec4\u4ef6\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u81ea\u5df1\u7684state\u6765\u4f20\u9012\u65b0\u7684props\u3002\u5f53props\u53d1\u751f\u53d8\u5316\u65f6\uff0cReact\u4f1a\u91cd\u65b0\u6e32\u67d3\u5b50\u7ec4\u4ef6\uff0c\u4f7f\u5176\u663e\u793a\u6700\u65b0\u7684props\u503c\u3002<\/p>\n\n\n\n
props\u7684\u66f4\u65b0\u662f\u7531\u7236\u7ec4\u4ef6\u89e6\u53d1\u7684\uff0c\u5b50\u7ec4\u4ef6\u65e0\u6cd5\u76f4\u63a5\u4fee\u6539props\uff0c\u53ea\u80fd\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u7684\u5f62\u5f0f\u5c06\u66f4\u65b0\u4f20\u9012\u7ed9\u7236\u7ec4\u4ef6\u3002\u7236\u7ec4\u4ef6\u63a5\u6536\u5230\u66f4\u65b0\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u81ea\u5df1\u7684state\u6765\u4f20\u9012\u65b0\u7684props\u3002<\/p>\n\n\n\n
\n- State\u7684\u66f4\u65b0<\/li>\n<\/ol>\n\n\n\n
state\u662f\u7ec4\u4ef6\u5185\u90e8\u7684\u72b6\u6001\uff0c\u53ef\u4ee5\u901a\u8fc7setState()\u65b9\u6cd5\u6765\u4fee\u6539\u3002\u5f53state\u53d1\u751f\u53d8\u5316\u65f6\uff0cReact\u4f1a\u81ea\u52a8\u91cd\u65b0\u6e32\u67d3\u7ec4\u4ef6\uff0c\u4f7f\u5176\u663e\u793a\u6700\u65b0\u7684state\u503c\u3002<\/p>\n\n\n\n
setState()\u65b9\u6cd5\u662f\u5f02\u6b65\u7684\uff0c\u53ef\u4ee5\u63a5\u6536\u4e00\u4e2a\u5bf9\u8c61\u6216\u8005\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u3002\u5f53\u4f20\u9012\u4e00\u4e2a\u5bf9\u8c61\u65f6\uff0cReact\u4f1a\u5c06\u8be5\u5bf9\u8c61\u4e0e\u5f53\u524d\u7684state\u5408\u5e76\uff0c\u5e76\u89e6\u53d1\u91cd\u65b0\u6e32\u67d3\u3002\u5f53\u4f20\u9012\u4e00\u4e2a\u51fd\u6570\u65f6\uff0c\u51fd\u6570\u4f1a\u63a5\u6536\u5f53\u524d\u7684state\u4f5c\u4e3a\u53c2\u6570\uff0c\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684state\uff0cReact\u4f1a\u5c06\u65b0\u7684state\u4e0e\u5f53\u524d\u7684state\u5408\u5e76\uff0c\u5e76\u89e6\u53d1\u91cd\u65b0\u6e32\u67d3\u3002<\/p>\n\n\n\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7531\u4e8esetState()\u65b9\u6cd5\u662f\u5f02\u6b65\u7684\uff0c\u6240\u4ee5\u4e0d\u80fd\u5728\u8c03\u7528setState()\u65b9\u6cd5\u540e\u7acb\u5373\u8bfb\u53d6this.state\u7684\u503c\uff0c\u5426\u5219\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e0d\u6b63\u786e\u7684\u7ed3\u679c\u3002\u5982\u679c\u9700\u8981\u5728setState()\u65b9\u6cd5\u6267\u884c\u540e\u7acb\u5373\u8bfb\u53d6state\u7684\u503c\uff0c\u53ef\u4ee5\u5728setState()\u65b9\u6cd5\u4e2d\u4f20\u9012\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\uff0c\u5728\u56de\u8c03\u51fd\u6570\u4e2d\u8bfb\u53d6state\u7684\u503c\u3002<\/p>\n\n\n\n
\u603b\u7684\u6765\u8bf4\uff0cprops\u548cstate\u90fd\u53ef\u4ee5\u88ab\u66f4\u65b0\uff0c\u4f46\u662f\u66f4\u65b0\u7684\u65b9\u5f0f\u548c\u6548\u679c\u6709\u6240\u4e0d\u540c\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u6765\u9009\u62e9\u4f7f\u7528\u3002\u5728\u66f4\u65b0props\u548cstate\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u66f4\u65b0\u7684\u65f6\u673a\u548c\u65b9\u5f0f\uff0c\u4ee5\u4fdd\u8bc1\u7ec4\u4ef6\u7684\u6b63\u786e\u6027\u548c\u6027\u80fd\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u4e8b\u4ef6\u5904\u7406\u6982\u8ff0<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u548c\u539f\u751f\u7684DOM\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u6709\u6240\u4e0d\u540c\uff0c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n
\n- \u4e8b\u4ef6\u7ed1\u5b9a\u65b9\u5f0f<\/li>\n<\/ol>\n\n\n\n
React\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u91c7\u7528\u7684\u662f\u5c5e\u6027\u7ed1\u5b9a\u7684\u65b9\u5f0f\uff0c\u800c\u4e0d\u662f\u50cf\u539f\u751f\u7684DOM\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u4e00\u6837\u91c7\u7528\u4e8b\u4ef6\u76d1\u542c\u5668\u7684\u65b9\u5f0f\u3002\u5728React\u4e2d\uff0c\u7ec4\u4ef6\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7\u5c5e\u6027\u7684\u5f62\u5f0f\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\uff0c\u5b50\u7ec4\u4ef6\u53ef\u4ee5\u5728\u7279\u5b9a\u7684\u4e8b\u4ef6\u89e6\u53d1\u65f6\u8c03\u7528\u8be5\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\n- \u4e8b\u4ef6\u5904\u7406\u65b9\u6cd5<\/li>\n<\/ol>\n\n\n\n
\u5728React\u4e2d\uff0c\u4e8b\u4ef6\u5904\u7406\u65b9\u6cd5\u662f\u6307\u5f53\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0cReact\u8981\u6267\u884c\u7684\u65b9\u6cd5\u3002\u4e8b\u4ef6\u5904\u7406\u65b9\u6cd5\u9700\u8981\u7ed1\u5b9a\u5230\u7ec4\u4ef6\u4e0a\uff0c\u53ef\u4ee5\u5728\u7ec4\u4ef6\u7684\u6784\u9020\u51fd\u6570\u4e2d\u7ed1\u5b9a\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u7bad\u5934\u51fd\u6570\u7684\u65b9\u5f0f\u7ed1\u5b9a\u3002<\/p>\n\n\n\n
\n- \u4e8b\u4ef6\u5bf9\u8c61<\/li>\n<\/ol>\n\n\n\n
\u5728React\u4e2d\uff0c\u4e8b\u4ef6\u5bf9\u8c61\u662f\u4e00\u4e2a\u5c01\u88c5\u4e86\u6d4f\u89c8\u5668\u539f\u751f\u4e8b\u4ef6\u5bf9\u8c61\u7684React\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\u3002\u5b83\u5305\u542b\u4e86\u6240\u6709\u539f\u751f\u4e8b\u4ef6\u5bf9\u8c61\u4e2d\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u540c\u65f6\u8fd8\u5305\u542b\u4e86\u4e00\u4e9b\u989d\u5916\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n\n\n\n
\n- \u4e8b\u4ef6\u59d4\u6258<\/li>\n<\/ol>\n\n\n\n
\u5728React\u4e2d\uff0c\u4e8b\u4ef6\u59d4\u6258\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u4f18\u5316\u65b9\u5f0f\u3002\u901a\u8fc7\u5728\u7236\u7ec4\u4ef6\u4e2d\u7ed1\u5b9a\u4e8b\u4ef6\u5904\u7406\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u5b50\u7ec4\u4ef6\u4e2d\u7684\u4e8b\u4ef6\u5904\u7406\u59d4\u6258\u7ed9\u7236\u7ec4\u4ef6\u6765\u5904\u7406\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u4e8b\u4ef6\u7ed1\u5b9a\u7684\u6570\u91cf\u3002<\/p>\n\n\n\n
\n- \u907f\u514d\u4e8b\u4ef6\u5192\u6ce1<\/li>\n<\/ol>\n\n\n\n
\u5728React\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528\u4e8b\u4ef6\u5bf9\u8c61\u7684stopPropagation()\u65b9\u6cd5\u6765\u963b\u6b62\u4e8b\u4ef6\u5192\u6ce1\u3002<\/p>\n\n\n\n
\u603b\u7684\u6765\u8bf4\uff0cReact\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u91c7\u7528\u5c5e\u6027\u7ed1\u5b9a\u7684\u65b9\u5f0f\uff0c\u4e8b\u4ef6\u5904\u7406\u65b9\u6cd5\u9700\u8981\u7ed1\u5b9a\u5230\u7ec4\u4ef6\u4e0a\uff0c\u4e8b\u4ef6\u5bf9\u8c61\u662f\u4e00\u4e2a\u5c01\u88c5\u4e86\u6d4f\u89c8\u5668\u539f\u751f\u4e8b\u4ef6\u5bf9\u8c61\u7684React\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\uff0c\u4e8b\u4ef6\u59d4\u6258\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u4f18\u5316\u65b9\u5f0f\uff0c\u907f\u514d\u4e8b\u4ef6\u5192\u6ce1\u53ef\u4ee5\u4f7f\u7528stopPropagation()\u65b9\u6cd5\u3002\u719f\u6089React\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u5bf9\u4e8e\u5f00\u53d1\u9ad8\u8d28\u91cf\u7684React\u5e94\u7528\u7a0b\u5e8f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u4e8b\u4ef6\u5904\u7406\u51fd\u6570<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u662f\u5728\u7ec4\u4ef6\u4e2d\u5b9a\u4e49\u7684JavaScript\u51fd\u6570\uff0c\u7528\u4e8e\u5904\u7406\u7528\u6237\u4ea4\u4e92\u4e8b\u4ef6\u3002\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u901a\u5e38\u5728\u7ec4\u4ef6\u4e2d\u4f5c\u4e3aprops\u4f20\u9012\u7ed9\u5b50\u7ec4\u4ef6\u3002<\/p>\n\n\n\n
React\u7684\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u6709\u4ee5\u4e0b\u51e0\u4e2a\u7279\u70b9\uff1a<\/p>\n\n\n\n
\n- \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u91c7\u7528\u9a7c\u5cf0\u547d\u540d\u6cd5<\/li>\n<\/ol>\n\n\n\n
\u5728React\u4e2d\uff0c\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u7684\u540d\u79f0\u91c7\u7528\u9a7c\u5cf0\u547d\u540d\u6cd5\u3002\u4f8b\u5982\uff0conClick\u3001onBlur\u3001onSubmit\u7b49\u3002<\/p>\n\n\n\n
\n- \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u63a5\u6536\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570<\/li>\n<\/ol>\n\n\n\n
React\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u5408\u6210\u4e8b\u4ef6\u5bf9\u8c61\uff0c\u5b83\u662fReact\u5c01\u88c5\u7684\u4e00\u4e2a\u8de8\u6d4f\u89c8\u5668\u7684\u4e8b\u4ef6\u5bf9\u8c61\uff0c\u5305\u542b\u4e86\u4e00\u4e9b\u539f\u751f\u4e8b\u4ef6\u5bf9\u8c61\u6240\u4e0d\u5177\u5907\u7684\u7279\u6027\u3002<\/p>\n\n\n\n
\n- \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u5185\u90e8\u7684this\u6307\u5411\u7ec4\u4ef6\u5b9e\u4f8b<\/li>\n<\/ol>\n\n\n\n
\u5728React\u4e2d\uff0c\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u5185\u90e8\u7684this\u6307\u5411\u5f53\u524d\u7ec4\u4ef6\u5b9e\u4f8b\u3002<\/p>\n\n\n\n
\n- \u4f7f\u7528\u7bad\u5934\u51fd\u6570\u7ed1\u5b9a\u4e8b\u4ef6\u5904\u7406\u51fd\u6570<\/li>\n<\/ol>\n\n\n\n
\u4e3a\u4e86\u786e\u4fdd\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u5185\u90e8\u7684this\u6307\u5411\u7ec4\u4ef6\u5b9e\u4f8b\uff0c\u901a\u5e38\u4f1a\u4f7f\u7528\u7bad\u5934\u51fd\u6570\u6765\u5b9a\u4e49\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy codeclass MyComponent extends React.Component {\n handleClick = (event) => {\n console.log(this.props.text);\n }\n \n render() {\n return <button onClick={this.handleClick}>Click me<\/button>;\n }\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u53eb\u505ahandleClick\u7684\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\uff0c\u5e76\u5c06\u5b83\u4f20\u9012\u7ed9\u4e86button\u7ec4\u4ef6\u7684onClick\u5c5e\u6027\u3002\u5f53\u6309\u94ae\u88ab\u70b9\u51fb\u65f6\uff0chandleClick\u51fd\u6570\u5c06\u88ab\u8c03\u7528\uff0c\u5e76\u8f93\u51fathis.props.text\u7684\u503c\u3002\u7531\u4e8ehandleClick\u51fd\u6570\u4f7f\u7528\u4e86\u7bad\u5934\u51fd\u6570\u6765\u5b9a\u4e49\uff0c\u56e0\u6b64\u5728\u51fd\u6570\u5185\u90e8\u7684this\u6307\u5411\u5f53\u524d\u7ec4\u4ef6\u5b9e\u4f8b\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u7ed1\u5b9athis<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u7ec4\u4ef6\u7684\u65b9\u6cd5\u9ed8\u8ba4\u662f\u4e0d\u4f1a\u81ea\u52a8\u7ed1\u5b9athis\u7684\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u624b\u52a8\u6765\u7ed1\u5b9a\u3002\u5426\u5219\uff0c\u5728\u65b9\u6cd5\u5185\u90e8\u4f7f\u7528this\u65f6\uff0c\u5b83\u4f1a\u6307\u5411undefined\uff0c\u5bfc\u81f4\u7a0b\u5e8f\u51fa\u73b0\u9519\u8bef\u3002<\/p>\n\n\n\n
\u6709\u51e0\u79cd\u5e38\u89c1\u7684\u65b9\u6cd5\u6765\u7ed1\u5b9athis\uff1a<\/p>\n\n\n\n
\n- \u5728\u6784\u9020\u51fd\u6570\u4e2d\u7ed1\u5b9athis<\/li>\n<\/ol>\n\n\n\n
\u5728\u7ec4\u4ef6\u7684\u6784\u9020\u51fd\u6570\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528bind\u65b9\u6cd5\u6765\u7ed1\u5b9athis\u3002\u8fd9\u79cd\u65b9\u6cd5\u9700\u8981\u5728\u6bcf\u4e2a\u9700\u8981\u7ed1\u5b9athis\u7684\u65b9\u6cd5\u4e2d\u90fd\u8c03\u7528\u4e00\u904dbind\u65b9\u6cd5\uff0c\u6bd4\u8f83\u7e41\u7410\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy codeclass MyComponent extends React.Component {\n constructor(props) {\n super(props);\n this.handleClick = this.handleClick.bind(this);\n }\n \n handleClick() {\n console.log(this.props.text);\n }\n \n render() {\n return <button onClick={this.handleClick}>Click me<\/button>;\n }\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5728\u6784\u9020\u51fd\u6570\u4e2d\u4f7f\u7528bind\u65b9\u6cd5\u6765\u7ed1\u5b9ahandleClick\u65b9\u6cd5\u7684this\uff0c\u8fd9\u6837\u5728handleClick\u65b9\u6cd5\u5185\u90e8\u5c31\u53ef\u4ee5\u6b63\u786e\u5730\u8bbf\u95eethis.props\u3002<\/p>\n\n\n\n
\n- \u4f7f\u7528\u7bad\u5934\u51fd\u6570<\/li>\n<\/ol>\n\n\n\n
\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528\u7bad\u5934\u51fd\u6570\u6765\u5b9a\u4e49\u7ec4\u4ef6\u7684\u65b9\u6cd5\u3002\u7bad\u5934\u51fd\u6570\u4f1a\u81ea\u52a8\u7ed1\u5b9a\u5f53\u524d\u7ec4\u4ef6\u5b9e\u4f8b\u7684this\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u4e0d\u9700\u8981\u624b\u52a8\u7ed1\u5b9a\u4e86\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy codeclass MyComponent extends React.Component {\n handleClick = () => {\n console.log(this.props.text);\n }\n \n render() {\n return <button onClick={this.handleClick}>Click me<\/button>;\n }\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u7bad\u5934\u51fd\u6570\u6765\u5b9a\u4e49handleClick\u65b9\u6cd5\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u5728\u65b9\u6cd5\u5185\u90e8\u6b63\u786e\u5730\u8bbf\u95eethis.props\u3002<\/p>\n\n\n\n
\n- \u4f7f\u7528Function.prototype.bind\u65b9\u6cd5<\/li>\n<\/ol>\n\n\n\n
\u8fd8\u53ef\u4ee5\u4f7f\u7528Function.prototype.bind\u65b9\u6cd5\u6765\u624b\u52a8\u7ed1\u5b9athis\u3002\u8fd9\u79cd\u65b9\u6cd5\u548c\u5728\u6784\u9020\u51fd\u6570\u4e2d\u7ed1\u5b9athis\u7c7b\u4f3c\uff0c\u4f46\u662f\u53ef\u4ee5\u5728\u7ec4\u4ef6\u7684\u4efb\u4f55\u5730\u65b9\u4f7f\u7528\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy codeclass MyComponent extends React.Component {\n handleClick() {\n console.log(this.props.text);\n }\n \n render() {\n const boundClick = this.handleClick.bind(this);\n return <button onClick={boundClick}>Click me<\/button>;\n }\n}\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5728render\u65b9\u6cd5\u4e2d\u4f7f\u7528bind\u65b9\u6cd5\u6765\u624b\u52a8\u7ed1\u5b9ahandleClick\u65b9\u6cd5\u7684this\uff0c\u5e76\u5c06\u7ed1\u5b9a\u540e\u7684\u51fd\u6570\u4f20\u9012\u7ed9\u4e86button\u7ec4\u4ef6\u7684onClick\u5c5e\u6027\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u4e2d\u4ec0\u4e48\u662f\u6761\u4ef6\u6e32\u67d3<\/p>\n\n\n\n
\u6761\u4ef6\u6e32\u67d3\u662f\u6307\u6839\u636e\u67d0\u4e9b\u6761\u4ef6\uff0c\u51b3\u5b9a\u6e32\u67d3\u54ea\u4e9b\u7ec4\u4ef6\u6216\u5143\u7d20\u3002\u5728React\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528if\u8bed\u53e5\u3001\u4e09\u5143\u8fd0\u7b97\u7b26\u3001\u903b\u8f91\u8fd0\u7b97\u7b26\u7b49\u6765\u5b9e\u73b0\u6761\u4ef6\u6e32\u67d3\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528if\u8bed\u53e5\u5b9e\u73b0\u6761\u4ef6\u6e32\u67d3\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy codefunction Greeting(props) {\n if (props.isLoggedIn) {\n return <h1>Welcome back!<\/h1>;\n } else {\n return <h1>Please log in.<\/h1>;\n }\n}\n\nReactDOM.render(\n <Greeting isLoggedIn={true} \/>,\n document.getElementById('root')\n);\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2aGreeting\u7ec4\u4ef6\uff0c\u6839\u636eprops.isLoggedIn\u7684\u503c\u6765\u51b3\u5b9a\u6e32\u67d3\u4e0d\u540c\u7684\u6587\u672c\u3002\u5728ReactDOM.render\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u4f20\u9012\u4e86\u4e00\u4e2aisLoggedIn\u4e3atrue\u7684props\u5bf9\u8c61\uff0c\u6240\u4ee5\u6e32\u67d3\u51fa\u6765\u7684\u6587\u672c\u662f”Welcome back!”\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u4e09\u5143\u8fd0\u7b97\u7b26\u5b9e\u73b0\u6761\u4ef6\u6e32\u67d3\u7684\u793a\u4f8b\uff1a<\/p>\n\n\n\n
javascriptCopy codefunction Greeting(props) {\n return (\n <div>\n {props.isLoggedIn ? (\n <h1>Welcome back!<\/h1>\n ) : (\n <h1>Please log in.<\/h1>\n )}\n <\/div>\n );\n}\n\nReactDOM.render(\n <Greeting isLoggedIn={false} \/>,\n document.getElementById('root')\n);\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e09\u5143\u8fd0\u7b97\u7b26\u6765\u6839\u636eprops.isLoggedIn\u7684\u503c\u6765\u51b3\u5b9a\u6e32\u67d3\u4e0d\u540c\u7684\u6587\u672c\u3002<\/p>\n\n\n\n
\u9664\u4e86if\u8bed\u53e5\u548c\u4e09\u5143\u8fd0\u7b97\u7b26\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u903b\u8f91\u8fd0\u7b97\u7b26\u6765\u5b9e\u73b0\u6761\u4ef6\u6e32\u67d3\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n
javascriptCopy codefunction Greeting(props) {\n return (\n <div>\n {props.isLoggedIn && <h1>Welcome back!<\/h1>}\n <\/div>\n );\n}\n\nReactDOM.render(\n <Greeting isLoggedIn={true} \/>,\n document.getElementById('root')\n);\n<\/code><\/pre>\n\n\n\n\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u903b\u8f91\u4e0e\u8fd0\u7b97\u7b26\u6765\u5224\u65adprops.isLoggedIn\u7684\u503c\u662f\u5426\u4e3atrue\uff0c\u5982\u679c\u662ftrue\uff0c\u5219\u6e32\u67d3<h1>Welcome back!<\/h1>\uff0c\u5426\u5219\u4e0d\u6e32\u67d3\u4efb\u4f55\u5185\u5bb9\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u7684\u4e0e\u8fd0\u7b97\u7b26\u548c\u903b\u8f91\u8fd0\u7b97\u7b26<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u4e0e\u8fd0\u7b97\u7b26\uff08&&\uff09\u548c\u903b\u8f91\u8fd0\u7b97\u7b26\uff08||\uff09\u5e38\u5e38\u7528\u4e8e\u6761\u4ef6\u6e32\u67d3\u548c\u7b80\u5316\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u7f16\u5199\u3002<\/p>\n\n\n\n
\n- \u4e0e\u8fd0\u7b97\u7b26\uff08&&\uff09 \u4e0e\u8fd0\u7b97\u7b26\u53ef\u4ee5\u7528\u6765\u6839\u636e\u67d0\u4e2a\u6761\u4ef6\u6765\u51b3\u5b9a\u662f\u5426\u6e32\u67d3\u67d0\u4e2a\u7ec4\u4ef6\u6216\u5143\u7d20\u3002\u5f53\u6761\u4ef6\u4e3a\u771f\u65f6\uff0c\u8fd4\u56de\u9700\u8981\u6e32\u67d3\u7684\u7ec4\u4ef6\u6216\u5143\u7d20\uff0c\u5426\u5219\u8fd4\u56denull\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n\n\n\n
javascriptCopy codefunction App() {\n const isLoggedIn = true;\n return (\n <div>\n {isLoggedIn && <p>Welcome back!<\/p>}\n <\/div>\n );\n}\n<\/code><\/pre>\n\n\n\n\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u5f53isLoggedIn\u4e3atrue\u65f6\uff0c\u4f1a\u6e32\u67d3<p>Welcome back!<\/p>\u7ec4\u4ef6\uff0c\u5426\u5219\u4ec0\u4e48\u90fd\u4e0d\u4f1a\u6e32\u67d3\u3002<\/p>\n\n\n\n
\n- \u903b\u8f91\u8fd0\u7b97\u7b26\uff08||\uff09 \u903b\u8f91\u8fd0\u7b97\u7b26\u5e38\u5e38\u7528\u4e8e\u7b80\u5316\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u7f16\u5199\u3002\u5f53\u7b2c\u4e00\u4e2a\u64cd\u4f5c\u6570\u4e3a\u5047\u65f6\uff0c\u8fd4\u56de\u7b2c\u4e8c\u4e2a\u64cd\u4f5c\u6570\uff1b\u5426\u5219\u8fd4\u56de\u7b2c\u4e00\u4e2a\u64cd\u4f5c\u6570\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n\n\n\n
javascriptCopy codefunction App() {\n const username = '';\n const displayName = username || 'Guest';\n return (\n <div>\n <h1>Hello, {displayName}!<\/h1>\n <\/div>\n );\n}\n<\/code><\/pre>\n\n\n\n\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u5982\u679cusername\u4e3a\u7a7a\u5b57\u7b26\u4e32\uff0c\u5219\u4f1a\u5c06displayName\u8bbe\u7f6e\u4e3a’Guest’\uff0c\u5426\u5219\u5c06displayName\u8bbe\u7f6e\u4e3ausername\u7684\u503c\u3002<\/p>\n\n\n\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u4f7f\u7528\u903b\u8f91\u8fd0\u7b97\u7b26\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u64cd\u4f5c\u6570\u7684\u7c7b\u578b\u548c\u503c\u3002\u4f8b\u5982\uff0c0\u3001null\u3001undefined\u3001false\u3001NaN\u7b49\u5728\u903b\u8f91\u8fd0\u7b97\u4e2d\u90fd\u4f1a\u88ab\u89c6\u4e3a\u5047\uff0c\u800c\u975e0\u6570\u5b57\u3001\u7a7a\u5b57\u7b26\u4e32\u3001\u7a7a\u5bf9\u8c61\u7b49\u5728\u903b\u8f91\u8fd0\u7b97\u4e2d\u4f1a\u88ab\u89c6\u4e3a\u771f\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u4e2d\u4ec0\u4e48\u662f\u5217\u8868<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u5217\u8868\u662f\u6307\u5c06\u4e00\u7ec4\u6570\u636e\u6e32\u67d3\u4e3a\u591a\u4e2a\u7ec4\u4ef6\u6216\u5143\u7d20\u7684\u64cd\u4f5c\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u4f1a\u4f7f\u7528JavaScript\u4e2d\u7684\u6570\u7ec4\u6765\u5b58\u50a8\u8fd9\u4e9b\u6570\u636e\uff0c\u7136\u540e\u901a\u8fc7\u904d\u5386\u6570\u7ec4\u6765\u6e32\u67d3\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n\n\n\n
React\u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u4fbf\u7684\u65b9\u5f0f\u6765\u904d\u5386\u6570\u7ec4\u5e76\u6e32\u67d3\u6bcf\u4e2a\u5143\u7d20\uff0c\u5373\u4f7f\u7528map()\u65b9\u6cd5\u3002map()\u65b9\u6cd5\u4f1a\u5bf9\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u6307\u5b9a\u7684\u64cd\u4f5c\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u5bf9\u539f\u59cb\u6570\u7ec4\u4e2d\u6bcf\u4e2a\u5143\u7d20\u7684\u5904\u7406\u7ed3\u679c\u3002\u5728React\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528map()\u65b9\u6cd5\u6765\u904d\u5386\u6570\u636e\u6570\u7ec4\u5e76\u6e32\u67d3\u5217\u8868\u3002<\/p>\n\n\n\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u6f14\u793a\u5982\u4f55\u4f7f\u7528map()\u65b9\u6cd5\u6e32\u67d3\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868\uff1a<\/p>\n\n\n\n
javascriptCopy codefunction App() {\n const items = ['apple', 'banana', 'orange'];\n\n return (\n <ul>\n {items.map((item) => (\n <li key={item}>{item}<\/li>\n ))}\n <\/ul>\n );\n}\n<\/code><\/pre>\n\n\n\n\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5148\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4items\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4e09\u4e2a\u6c34\u679c\u7684\u540d\u79f0\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528map()\u65b9\u6cd5\u904d\u5386\u8fd9\u4e2a\u6570\u7ec4\uff0c\u5bf9\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u64cd\u4f5c\uff0c\u6e32\u67d3\u4e00\u4e2a<li>\u5143\u7d20\u3002\u5728\u6e32\u67d3\u6bcf\u4e2a<li>\u5143\u7d20\u65f6\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u5143\u7d20\u7684\u503c\u4f5c\u4e3akey\u5c5e\u6027\u7684\u503c\uff0c\u4ee5\u786e\u4fddReact\u53ef\u4ee5\u6b63\u786e\u5730\u8ddf\u8e2a\u6bcf\u4e2a\u5143\u7d20\u7684\u53d8\u5316\u3002\u6700\u540e\uff0c\u6211\u4eec\u5c06\u6e32\u67d3\u597d\u7684<li>\u5143\u7d20\u653e\u7f6e\u5728\u4e00\u4e2a<ul>\u5143\u7d20\u4e2d\uff0c\u5f62\u6210\u4e00\u4e2a\u5b8c\u6574\u7684\u5217\u8868\u3002<\/p>\n\n\n\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u6e32\u67d3\u5217\u8868\u65f6\uff0c\u5fc5\u987b\u4e3a\u6bcf\u4e2a\u5143\u7d20\u8bbe\u7f6e\u4e00\u4e2a\u552f\u4e00\u7684key\u5c5e\u6027\u3002\u8fd9\u4e2a\u5c5e\u6027\u53ef\u4ee5\u5e2e\u52a9React\u6b63\u786e\u5730\u8ddf\u8e2a\u6bcf\u4e2a\u5143\u7d20\u7684\u53d8\u5316\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u5e76\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6e32\u67d3\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5143\u7d20\u7684\u7d22\u5f15\u3001ID\u3001\u552f\u4e00\u6807\u8bc6\u7b26\u7b49\u4f5c\u4e3akey\u5c5e\u6027\u7684\u503c\u3002<\/p>\n\n\n\n\n\n<\/figure>\n\n\n\n\u8bf7\u8be6\u7ec6\u89e3\u91caReact\u5217\u8868\u6e32\u67d3<\/p>\n\n\n\n
\u5728React\u4e2d\uff0c\u6e32\u67d3\u5217\u8868\u901a\u5e38\u4f7f\u7528map()\u51fd\u6570\u6765\u904d\u5386\u4e00\u4e2a\u6570\u7ec4\u5e76\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u7ec4\u4ef6\u6216\u5143\u7d20\u7684\u6570\u7ec4\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n
javascriptCopy codefunction App() {\n const list = [\"apple\", \"banana\", \"orange\"];\n\n return (\n <ul>\n {list.map((item) => (\n <li key={item}>{item}<\/li>\n ))}\n <\/ul>\n );\n}\n<\/code><\/pre>\n\n\n\n\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5305\u542b\u4e09\u4e2a\u5b57\u7b26\u4e32\u7684\u6570\u7ec4list\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528map()\u51fd\u6570\u904d\u5386\u8be5\u6570\u7ec4\uff0c\u5e76\u4e3a\u6bcf\u4e2a\u5143\u7d20\u8fd4\u56de\u4e00\u4e2a<li>\u5143\u7d20\u3002\u5728\u6e32\u67d3\u6bcf\u4e2a<li>\u5143\u7d20\u65f6\uff0c\u6211\u4eec\u4f7f\u7528\u5143\u7d20\u7684\u503c\u4f5c\u4e3akey\u5c5e\u6027\u7684\u503c\uff0c\u4ee5\u786e\u4fddReact\u80fd\u591f\u6b63\u786e\u5730\u8ddf\u8e2a\u6bcf\u4e2a\u5143\u7d20\u7684\u53d8\u5316\u3002<\/p>\n\n\n\n
\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u4f7f\u7528map()\u51fd\u6570\u904d\u5386\u6570\u7ec4\u65f6\uff0c\u9700\u8981\u4e3a\u6bcf\u4e2a\u5143\u7d20\u6307\u5b9a\u4e00\u4e2a\u552f\u4e00\u7684key\u5c5e\u6027\u3002\u8fd9\u4e2a\u5c5e\u6027\u53ef\u4ee5\u5e2e\u52a9React\u5728\u66f4\u65b0\u5217\u8868\u65f6\u66f4\u5feb\u5730\u627e\u5230\u53d8\u5316\u7684\u5143\u7d20\uff0c\u4ece\u800c\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n
\u5728\u4f7f\u7528map()\u51fd\u6570\u6e32\u67d3\u5217\u8868\u65f6\uff0c\u8fd8\u53ef\u4ee5\u5c06\u6bcf\u4e2a\u5143\u7d20\u7684\u5c5e\u6027\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u88ab\u6e32\u67d3\u7684\u7ec4\u4ef6\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3aTodoItem\u7684\u7ec4\u4ef6\uff0c\u5b83\u6e32\u67d3\u4e00\u4e2a\u5f85\u529e\u4e8b\u9879\u7684\u5217\u8868\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5c06\u6bcf\u4e2a\u5143\u7d20\u7684\u5c5e\u6027\u4f20\u9012\u7ed9TodoItem\u7ec4\u4ef6\u6765\u6e32\u67d3\u5f85\u529e\u4e8b\u9879\u5217\u8868\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n
javascriptCopy codefunction App() {\n const todoList = [\n { id: 1, text: \"Buy milk\" },\n { id: 2, text: \"Finish homework\" },\n { id: 3, text: \"Go for a run\" },\n ];\n\n return (\n <ul>\n {todoList.map((item) => (\n <TodoItem key={item.id} id={item.id} text={item.text} \/>\n ))}\n <\/ul>\n );\n}\n\nfunction TodoItem(props) {\n return <li>{props.text}<\/li>;\n}\n<\/code><\/pre>\n\n\n\n\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5305\u542b\u4e09\u4e2a\u5bf9\u8c61\u7684\u6570\u7ec4todoList\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u5305\u542b\u4e00\u4e2aid\u548c\u4e00\u4e2atext\u5c5e\u6027\u3002\u6211\u4eec\u4f7f\u7528map()\u51fd\u6570\u904d\u5386\u8fd9\u4e2a\u6570\u7ec4\uff0c\u5e76\u5c06\u6bcf\u4e2a\u5143\u7d20\u7684id\u548ctext\u5c5e\u6027\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9TodoItem\u7ec4\u4ef6\uff0c\u4ece\u800c\u6e32\u67d3\u4e00\u4e2a\u5f85\u529e\u4e8b\u9879\u5217\u8868\u3002\u5728TodoItem\u7ec4\u4ef6\u4e2d\uff0c\u6211\u4eec\u53ea\u6e32\u67d3\u4e86\u5f85\u529e\u4e8b\u9879\u7684\u6587\u672c\u5185\u5bb9\uff0c\u800c\u5ffd\u7565\u4e86id\u5c5e\u6027\u3002<\/p>\n\n\n\n\n\n