v-on指令事件
- v-on:click(鼠标单击事件)
- v-on:dblclick(鼠标双击事件)
- v-on:focusin(获得焦点事件)
- v-on:focusout(失去焦点事件)
- v-on:mousedown(鼠标任意一个键按下去的事件)
- v-on:mouseup(鼠标任意一个键弹起来的事件)
示例
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>关注和取消关注练习</title>
<!-- 通过CDN引入Vue.js -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<link rel="stylesheet" type="text/css" href="css/font-awesome.min.css"/>
<style type="text/css">
.followed{
color: #ddd;
}
.cancel-followed{
color: green;
}
.link{
cursor: pointer;
}
.btn{
width: 100px;
height: 35px;
color: rgb(234,11,90);
border-radius: 20px;
font-size: 14px;
background-color: #fff;
border: 1px solid rgb(234,11,90);
outline: none;
cursor: pointer;
}
.btn1{
width: 100px;
height: 35px;
color: rgb(234,11,90);
border-radius: 20px;
font-size: 14px;
background-color:orangered;
border: 1px solid rgb(234,11,90);
outline: none;
cursor: pointer;
}
</style>
</head>
<body>
<!-- vueapp的根容器 -->
<div id="app">
<h2>{{name}}</h2>
<span class="followed link" v-show="followed" @click="handlefollow"><i class="icon-ok"></i>已关注</span>
<span class="cancel-followed link" v-show="followed===false" @click="handlefollow"><i class="icon-plus"></i>关注</span>
<button type="button" class="btn" v-show="like" @click="iffollow"><i class="icon-heart-empty"></i>喜欢 |{{likes}}</button>
<button type="button" class="btn1" v-show="like===false" @click="unfollow(1)"><i class="icon-heart"></i>喜欢 |{{likes}}</button>
</div>
<script type="text/javascript">
// 实例化一个vue对象
var app = new Vue({
el: '#app',
data: {
name:'简书作者',
followed:false,
likes:1000,
like:true
},
methods:{
handlefollow:function(){
this.followed=!this.followed;
},
iffollow:function(){
this.like=!this.like;
if(like=true){
this.likes+=1;
}
},
unfollow:function(num){
this.like=!this.like;
this.likes-=num;
}
}
})
</script>
</body>
</html>
在methods下面放方法，注意每个方法后面加“，”最后一个不用加，v-on:click可以简写成@click="方法名"可以加在任意一个元素后边
