小例子（点击按钮数值加一）

最新推荐文章于 2025-10-28 15:42:58 发布

原创最新推荐文章于 2025-10-28 15:42:58 发布 · 3.7k 阅读

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <title>W3Cschool教程 React 实例</title>
    <script src="//www.w3cschool.cn/statics/assets/react/react.min.js"></script>
    <script src="//www.w3cschool.cn/statics/assets/react/react-dom.min.js"></script>
    <script src="//www.w3cschool.cn/statics/assets/react/babel.min.js"></script>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
    var HelloMessage = React.createClass({
        getInitialState: function() {
            return {count: 0};
        },
        handleChange: function(event) {
            this.setState({count: event.target.value});
        },
        render: function(){
            let count = this.state.count;
            return <div>
                <button type="text" value={1+parseInt(count)} onClick={this.handleChange} >点击按钮加1</button>
                <h4>{count}</h4>
            </div>;
        }
    });
    ReactDOM.render(
            <HelloMessage />,
        document.getElementById('example')
    );
</script>
</body>
</html>