xx

B/P06.html

@@ -1,7 +1,7 @@
 <!--
  * @Author: chenxuan
  * @Date: 2021-12-26 16:30:03
- * @LastEditTime: 2021-12-29 00:19:18
+ * @LastEditTime: 2021-12-30 22:12:26
  * @LastEditors: chenxuan
 -->
 <!DOCTYPE html>
@@ -26,15 +26,19 @@
 			}
 			render(){
 				const {ishot}=this.state;
-				return <h1 onClick={demo}>今天天气很{ishot ? '炎热' : '凉爽'}</h1>
+				// 解决this指向问题
+				return <h1 onClick={this.demo.bind(this)}>今天天气很{ishot ? '炎热' : '凉爽'}</h1>
+			}
+			demo(){
+				this.setState({
+					ishot:!this.state.ishot
+				})
 			}
 		}
 		ReactDOM.render(
 			<Weather/>,document.getElementById('app')
 		)
-		function demo(){
+		
-			console.log('xxx')
-		}
     </script>
 </body>
 </html>

B/P07.html

@@ -0,0 +1,38 @@
+<!--
+ * @Author: chenxuan
+ * @Date: 2021-12-31 00:08:42
+ * @LastEditTime: 2021-12-31 00:11:18
+ * @LastEditors: chenxuan
+-->
+<!DOCTYPE html>
+<html>
+<head>
+	<meta charset="utf-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1">
+	<title>state</title>
+</head>
+<body>
+	<div id="app"></div>
+	<script src="./package/old/react.development.js"></script>
+    <script src="./package/old/react-dom.development.js"></script>
+    <script src="./package/old/babel.min.js"></script>
+    <script type="text/babel">
+    	class Weather extends React.Component{
+            state={ishot:true}
+			render(){
+				const {ishot}=this.state;
+				return <h1 onClick={this.demo}>今天天气很{ishot ? '炎热' : '凉爽'}</h1>
+			}
+			demo=()=>{
+				this.setState({
+					ishot:!this.state.ishot
+				})
+			}
+		}
+		ReactDOM.render(
+			<Weather/>,document.getElementById('app')
+		)
+		
+    </script>
+</body>
+</html>