<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>computed-全选</title>
</head>
<body>
<div id="app">
<input type="checkbox" v-model=‘selected‘>全选/全不选
<br>
<span>
<span v-for="(item,index) in hobbyList">
<input type="checkbox" :id="item.id|handleId" :value="item.value" v-model=‘checkList‘>
<label :for="item.id|handleId" v-text="item.name">
</label>
</span>
</span>
<button @click="submit"> 提交 </button>
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
let vm = new Vue({
el: "#app",
data: {
hobbyList:[
{
id:1,
name:‘唱歌‘,
value:‘song‘
},
{
id:2,
name:‘跳舞‘,
value:‘dance‘
},
{
id:3,
name:‘阅读‘,
value:‘read‘
},
{
id:4,
name:‘睡觉‘,
value:‘sleep‘
}
],
// 存储选中的兴趣爱好
checkList:[],
// 存储全选按钮的选中状态
// selected: false
},
computed:{
// 存储全选按钮的选中状态
selected:{
get(){
return this.checkList.length === this.hobbyList.length;
},
set(value){
// 点击 全选 和 非全选的时候
//value 存储是 选中的状态
// console.log(value)
if(value){
this.hobbyList.forEach(item => {
this.checkList.push(item.value)
});
return
}
this.checkList = []
}
}
},
filters:{
handleId(value){
return ‘hobby‘ + value;
}
},
methods:{
submit(){
}
}
});
</script>
</body>
</html>
