计时器
<!DOCTYPE html>
<html>
<body>
<div id="container"></div>
<script src="https://fb.me/react-0.14.7.js"></script>
<script src="https://fb.me/react-dom-0.14.7.js"></script>
<script>
var ExampleApplication = React.createClass({
render: function() {
var elapsed = Math.round(this.props.elapsed / 100);
var seconds = elapsed / 10 + (elapsed % 10 ? '' : '.0' );
var message =
'React has been successfully running for ' + seconds + ' seconds.';
return React.DOM.p(null, message);
}
});
var start = new Date().getTime();
setInterval(function() {
ReactDOM.render(
React.createElement(ExampleApplication,{elapsed: new Date().getTime() - start}),
document.getElementById('container')
);
}, 50);
</script>
</body>
</html>
1. 疑惑点
- 使用react,必须引入
react和react-dom
this.props.属性 : 外部调用本组件传递的属性值.React.createClass中的render : 返回的为该组件显示的内容ReactDOM.render(显示的组件,带插入的节点)