摘要
实现一个登录的react 组件， 包含组件更新、ajax 交互、渲染新组建。
代码
<head>
<meta charset="utf-8">
<title></title>
<script src="../build/react.js"></script>
<script src="../build/react-dom.js"></script>
<script src="../build/browser.min.js"></script>
<script src="../build/jquery.min.js"></script>
</head>
<body>
<div id="loginForm"></div>
<script type="text/babel">
var LoginForm = React.createClass({
getInitialState: function(){
return {
username: '',
password: '',
info: ''
};
},
handlerNameChange: function(event) {
var name = event.target.value;
// 验证name 有效性
if (name.length < 2) {
this.setState({name: name, info: '名称长度过短'});
}else {
this.setState({name: name, info: ''});
}
},
handlePasswordChange: function(event) {
var password = event.target.value;
// 验证password是否有效
if (password.length < 2) {
this.setState({password: password, info: '密码长度过短'});
}else {
this.setState({password: password, info: ''});
}
},
handlerLogin: function(event) {
var that = this;
var name = this.state.name;
var password = this.state.password;
if ((name.length < 2) || (password.length < 2)) {
that.setState({info: '名称/密码长度过短'});
}else {
// 模拟发送ajax 请求
$.ajax({
url: 'https://api.github.com/search/repositories?q=javascript&sort=stars',
type: 'get',
}).done(function(data) {
var incomplete_results = data.incomplete_results;
if(!incomplete_results) {
// that.setState({info: '登录成功'});
ReactDOM.render(<SuccessForm/>, document.getElementById('loginForm'));
}else {
that.setState({info: '登录失败，请检查名称or密码是否正确'});
}
});
}
},
render: function(){
return (
<div>
<div>姓名：<input type="text" value={this.state.name} onChange={this.handlerNameChange}/></div>
<div>密码：<input type="password" value={this.state.password} onChange={this.handlePasswordChange} /></div>
<div><span>{this.state.info}</span><button onClick={this.handlerLogin} type="button">登录</button></div>
</div>
);
}
});
ReactDOM.render(<LoginForm/>, document.getElementById('loginForm'));
var SuccessForm = React.createClass({
render: function() {
return (
<div>Success!</div>
);
}
});
</script>