<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./node_modules/react/umd/react.development.js"></script>
    <script src="./node_modules/react-dom/umd/react-dom.development.js"></script>
    <script src="./node_modules/babel-standalone/babel.min.js"></script>
    <script src="./node_modules/prop-types/prop-types.js"></script>
</head>
<body>
<div id="demoReact">

</div>
<script type="text/babel">
    class Com extends  React.Component{
        constructor(props) {
            super(props);
    this.state={
        bool:true
    }
        }
fun(){
         this.setState({
             bool:!this.state.bool
         })
}
        render(){
            let text;
            if(this.state.bool){
                text="你好"
            }else{
                text="世界"
            }
            return(
                <div>
                    我是组件
                    <button onClick={this.fun.bind(this)}>点我</button>
                    {text}
                    <p>三元运算符:{this.state.bool?"哈哈":"呵呵呵"}</p>
                </div>
            )
        }
    }

    ReactDOM.render(<Com/>,document.getElementById('demoReact'))



</script>
</body>
</html>

运行结果