react-tutorial/react/component/src/render/condition-rendering.html at master · Wscats/react-tutorial · GitHub

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<!DOCTYPE html>
<html lang="en">
    <head>
        <title>React-Component-define</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <!--React 核心库-->
        <script src="../../../js/react.js"></script>
        <!--React 跟 Dom 相关的功能库-->
        <script src="../../../js/react-dom.js"></script>
        <!--jsx 转换 js 的框架 babel-->
        <script src="../../../js/browser.min.js"></script>
    </head>
    <body>
        <div id="div1"></div>

        <!--jsx 语法-->
        <script type="text/babel">
            //定义
            function Login(props){
                return <input type="button" value="login" onClick={props.click}/>;
            }

            function Logout(props){
                return <input type="button" value="logout" onClick={props.click}/>;
            }
            var Component1 = React.createClass({
                getInitialState: function(){
                    return {
                        status: 0
                    }
                },
                login: function(){
                    this.setState({status: 1})
                },
                logout: function(){
                    this.setState({status: 0})
                },
                render: function(){
                    var button = null;
                    if(this.state.status == 1){
                        button = <Logout click={this.logout}/>
                    } else {
                        button = <Login click={this.login} />
                    }
                    return (
                        <div>
                            {button}
                        </div>
                    )
                }
            })
            //使用
            ReactDOM.render(<Component1 />, document.getElementById('div1'));
        </script>
    </body>
</html>