<!DOCTYPE html>
<html>
<head>
<script src="../../build/react.js"></script>
<script src="../../build/react-dom.js"></script>
<script src="../../build/browser.min.js"></script>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
var TodoList = React.createClass({
render: function() {
var createItem = function(item) {
return <li key={item.id}>{item.text}</li>;
};
return <ul>{this.props.items.map(createItem)}</ul>;
},
});
var TodoApp = React.createClass({
getInitialState: function() {
return {items: [], text: ‘‘};
},
onChange: function(e) {
this.setState({text: e.target.value});
},
handleSubmit: function(e) {
e.preventDefault();
var nextItems = this.state.items.concat([{text: this.state.text, id: Date.now()}]);
var nextText = ‘‘;
this.setState({items: nextItems, text: nextText});
},
render: function() {
return (
<div>
<h3>TODO</h3>
<TodoList items={this.state.items} />
<form onSubmit={this.handleSubmit}>
<input onChange={this.onChange} value={this.state.text} />
<button>{‘Add #‘ + (this.state.items.length + 1)}</button>
</form>
</div>
);
},
});
ReactDOM.render(<TodoApp />, document.getElementById(‘example‘));
</script>
</body>
</html>
原文：http://www.cnblogs.com/cynthia-wuqian/p/5209439.html