state.html

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>State</title></head><body>    <div id="app"></div>    <script src="react-15.3.1/build/react.js"></script>    <script src="react-15.3.1/build/react-dom.js"></script>    <script src="react-15.3.1/browser.js"></script>    <script type="text/babel">        var Counter=React.createClass({            getInitialState : function(){                return {                    msg : 0                };            },            clickHandler : function(){                this.setState({                    msg : this.state.msg + 1                });            },           render : function () {               return (                   <div>                       <button onClick={this.clickHandler}>click</button>                       <p>当前点击次数： {this.state.msg}次</p>                   </div>               );           }        });        ReactDOM.render(            <Counter/>,            document.getElementById("app")        )    </script></body></html>