Vue09 事件的修饰符

Vue中的事件修饰符:
1.prevent:阻止默认事件(常用);
2.stop:阻止事件冒泡(常用);
3.once:事件只触发一次(常用);
4.capture:使用事件的捕获模式;
5.self:只有event.target是当前操作的元素时才触发事件;
6.passive:事件的默认行为立即执行,无需等待事件回调执行完毕;

DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8" />
		<title>事件修饰符title>
		
		<script type="text/javascript" src="../js/vue.js">script>
		<style>
			*{
				margin-top: 20px;
			}
			.demo1{
				height: 50px;
				background-color: skyblue;
			}
			.box1{
				padding: 5px;
				background-color: skyblue;
			}
			.box2{
				padding: 5px;
				background-color: orange;
			}
			.list{
				width: 200px;
				height: 200px;
				background-color: peru;
				overflow: auto;
			}
			li{
				height: 100px;
			}
		style>
	head>
	<body>
		
		
		<div id="root">
			<h2>欢迎来到{{name}}学习h2>
			
			<a href="http://www.atguigu.com" @click.prevent="showInfo">点我提示信息a>

			
			<div class="demo1" @click="showInfo">
				<button @click.stop="showInfo">点我提示信息button>
				
				
			div>

			
			<button @click.once="showInfo">点我提示信息button>

			
			<div class="box1" @click.capture="showMsg(1)">
				div1
				<div class="box2" @click="showMsg(2)">
					div2
				div>
			div>

			
			<div class="demo1" @click.self="showInfo">
				<button @click="showInfo">点我提示信息button>
			div>

			
			<ul @wheel.passive="demo" class="list">
				<li>1li>
				<li>2li>
				<li>3li>
				<li>4li>
			ul>

		div>
	body>

	<script type="text/javascript">
		Vue.config.productionTip = false //阻止 vue 在启动时生成生产提示。

		new Vue({
			el:'#root',
			data:{
				name:'123'
			},
			methods:{
				showInfo(e){
					alert('同学你好!')
					// console.log(e.target)
				},
				showMsg(msg){
					console.log(msg)
				},
				demo(){
					for (let i = 0; i < 100000; i++) {
						console.log('#')
					}
					console.log('累坏了')
				}
			}
		})
	script>
html>

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