標籤：
<!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 Timer = React.createClass({ getInitialState : function(){ return {secondsElapsed:0}; }, tick : function(){ this.setState({secondsElapsed:this.state.secondsElapsed + 1}); }, componentDidMount : function(){ this.interval = setInterval(this.tick,1000); }, componentWillUnmount : function(){ clearInterval(this.interval); }, render : function(){ return ( <div>secondsElapsed:{this.state.secondsElapsed}</div> ) }, }); ReactDOM.render( <Timer />, document.getElementById(‘example‘) ); </script> </body></html>
react-conponent-secondesElapsed
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