<div>总计{{totalPrice}}</div>
this.list=[
{price:30,num:32,name:'book'},
{price:20,num:12,name:'apple'},
{price:10,num:31,name:'coffee'},
]
computed:{
// 总价
totalPrice(){
let total=0;
for(let i=0;i<this.list.length;i++){
total+=this.list[i].price*this.list[i].num
}
return total
// 千分位:total.toString().replace(/\B(?=(\d{3})+$)/g,',')
}
}