{"id":4590,"date":"2023-01-04T16:34:10","date_gmt":"2023-01-04T08:34:10","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4590"},"modified":"2023-01-04T16:34:10","modified_gmt":"2023-01-04T08:34:10","slug":"%e5%ad%b8%e7%bf%92react-js%e4%b8%ad%e7%9a%84%e7%b5%84%e4%bb%b6%e7%8b%80%e6%85%8bstate","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/react-js\/%e5%ad%b8%e7%bf%92react-js%e4%b8%ad%e7%9a%84%e7%b5%84%e4%bb%b6%e7%8b%80%e6%85%8bstate\/","title":{"rendered":"\u5b78\u7fd2React.js\u4e2d\u7684\u7d44\u4ef6\u72c0\u614b(state)"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"React, React \u7d44\u4ef6\u72c0\u614b(state)\"><\/p>\n<p>React \u7d44\u4ef6\u72c0\u614b(state)\u662f React.js 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\u7d44\u4ef6\u72c0\u614b(state)\u53ef\u4ee5\u88ab\u7528\u4f86\u5132\u5b58\u4efb\u4f55\u985e\u578b\u7684\u8cc7\u6599\uff0c\u4f8b\u5982\uff1a\u5b57\u4e32\u3001\u6578\u5b57\u3001\u7269\u4ef6\u3001\u9663\u5217\u7b49\u7b49\u3002\u5b83\u53ef\u4ee5\u88ab\u7528\u4f86\u5efa\u7acb\u53ef\u8b8a\u52d5\u7684\u8cc7\u6599\uff0c\u4e26\u4e14\u53ef\u4ee5\u5728\u7d44\u4ef6\u4e2d\u88ab\u4f7f\u7528\uff0c\u4e5f\u53ef\u4ee5\u88ab\u50b3\u905e\u5230\u5176\u4ed6\u7d44\u4ef6\u4e2d\u3002<\/p>\n<h2>\u5982\u4f55\u4f7f\u7528 React \u7d44\u4ef6\u72c0\u614b(state)<\/h2>\n<p>\u8981\u4f7f\u7528 React \u7d44\u4ef6\u72c0\u614b(state)\uff0c\u4f60\u9700\u8981\u5148\u5b9a\u7fa9\u4e00\u500b state \u7269\u4ef6\uff0c\u4e26\u4e14\u5c07\u5b83\u653e\u5728\u7d44\u4ef6\u7684 constructor \u4e2d\uff1a<\/p>\n<pre class=\"brush: javascript\">\nclass MyComponent extends React.Component {\n  constructor(props) {\n    super(props);\n    this.state = {\n      name: 'John',\n      age: 30\n    };\n  }\n  \/\/ ...\n}\n<\/pre>\n<p>\u63a5\u8457\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 this.state \u4f86\u5b58\u53d6\u7d44\u4ef6\u72c0\u614b(state)\uff1a<\/p>\n<pre class=\"brush: javascript\">\nrender() {\n  return (\n    <div>\n      My name is {this.state.name}\n      My age is {this.state.age}\n    <\/div>\n  );\n}\n<\/pre>\n<p>\u4f60\u4e5f\u53ef\u4ee5\u4f7f\u7528 this.setState() \u4f86\u66f4\u65b0\u7d44\u4ef6\u72c0\u614b(state)\uff1a<\/p>\n<pre class=\"brush: javascript\">\nhandleClick() {\n  this.setState({\n    name: 'Jane',\n    age: 25\n  });\n}\n<\/pre>\n<h2>\u7e3d\u7d50<\/h2>\n<p>React \u7d44\u4ef6\u72c0\u614b(state)\u662f React.js 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