Testaccount
/
1.Test


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
     <!-- 将jsx转为js -->
     <script src="./babel.min.js"></script>
     <!-- react核心库 -->
     <script src="./react.development.js"></script>
     <!-- react中dom操作库 -->
     <script src="./react-dom.development.js"></script>
</head>
<body>
    <div id="root"></div>
    <script type="text/babel">
        class Yes extends React.Component{
            state={
                title:"计数器",
                count:0,
            };
            handleAdd(){
                this.setState({
                    count:this.state.count+1,
                });
                console.log(this.state,'加法');
            }
            handleReduce=()=>{
                console.log(this)
                this.setState({
                    count:this.state.count-1,
                });
            };
            render() {
          return (
            <div>
              <h2>{this.state.title}</h2>
              <p>当前数值:{this.state.count}</p>
              <button onClick={this.handleAdd.bind(this)}>+</button>
              <button onClick={this.handleReduce}>-</button>
            </div>
          );
        }
    }
        let element=<Yes/>;
        ReactDOM.createRoot(document.querySelector("#root")).render(element);
    </script>
</body>
</html>