<!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>Document</title>
</head>
<body>
<div id="app">
<div>
<span>全选:</span>
<input type="checkbox" v-model="isAll" />
<button @click="reverseBtn">反选</button>
<ul>
<li v-for="(item,index) in arr" :key="index">
<input type="checkbox" v-model="item.checked"/>
<span>{{item.name}}</span>
</li>
</ul>
</div>
</div>
<script src="./vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
arr: [
{
name: "猪八戒",
checked: false,
},
{
name: "孙悟空",
checked: false,
},
{
name: "唐僧",
checked: false,
},
{
name: "白龙马",
checked: false,
},
],
},
computed:{
isAll:{
get(){
return this.arr.every(item=>item.checked)
},
set(value){
this.arr.forEach(item=>item.checked=value)
}
}
},
methods:{
reverseBtn(){
this.isAll=!this.isAll
}
}
})
</script>
</body>
</html>
