<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue菜鸟之路</title>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<div id="app1">
<div>你的购物车：</div>
<input type="checkbox" v-model="isAll" value='true' @input="handleInputAll()"> 全选
<div v-for="data in commodities">
<input type="checkbox" v-model="checkArr" :value='data' @input="handleInput()"> {{ data.name }}：{{ data.price }}元 ✖️ {{ data.number }}件
<button @click="handleClick(data,false)">-</button>
<button @click="handleClick(data,true)">+</button>
</div>
总计：{{ sum }}元
</div>
<script>
var app1 = new Vue({
el:'#app1',
data:{
checkArr: [],
sum: 0,
isAll: false,
commodities: [
{
id: "001",
name: "小刀",
number: 10,
price: 2
},
{
id: "002",
name: "胶水",
number: 200,
price: 5
},
{
id: "003",
name: "剪刀",
number: 2,
price: 10
},
]
},
methods: {
handleInput(){
this.sum=0;
for(var i in this.checkArr){
this.sum+=this.checkArr[i].number*this.checkArr[i].price;
}
},
handleInputAll(){
this.checkArr=[]
if(this.isAll){
this.checkArr=this.commodities
}
this.handleInput()
},
handleClick(data,add_or_sub){
temp=add_or_sub?1:-1
data.number+=temp
if(data.number<1){
data.number=1
}
this.handleInput()
}
}
})
</script>
</body>
</html>
