setState()

2017-07-17 16:37:00
admin
原创
561
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>React 实例</title>
    <script src="https://cdn.bootcss.com/react/15.4.2/react.min.js"></script>
	<script src="https://cdn.bootcss.com/react/15.4.2/react-dom.min.js"></script>
	<script src="https://cdn.bootcss.com/babel-standalone/6.22.1/babel.min.js"></script>
  </head>
 <body>
    <div id="message" align="center"></div>

    <script type="text/babel">
      var Counter = React.createClass({
        getInitialState: function () {
          return { clickCount: 0 };
        },
        handleClick: function () {
          this.setState(function(state) {
            return {clickCount: state.clickCount + 1};
          });
        },
        render: function () {
          return (<h2 onClick={this.handleClick}>点我!点击次数为: {this.state.clickCount}</h2>);
        }
      });
      ReactDOM.render(
        <Counter />,
        document.getElementById('message')
      );
    </script>
  </body>
</html>
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