<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>事件绑定</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
<div id="root">
    <h2>{{name}}</h2>
    <button @click.once="showInfo">点击我，事件仅执行一次</button>


</div>
<script type="text/javascript">
    Vue.config.productionTip = false;

    const vm = new Vue({
        el:'#root',
        data:{
            name:'虾米大王'
        },
        methods:{
            showInfo(){

                alert('点击了我，显示提示');

            }
        }
    })


</script>
</body>
</html>