(function (window) {
'use strict';
const vm = new Vue ({
el:'#app',
data:{
name:'',
list:[
{id:1,name:'抽烟',completed:false},
{id:2,name:'喝酒',completed:true},
{id:3,name:'烫头',completed:false},
]
},
methods:{
add(){
if(this.name.trim() === ''){
return
}
let id
if(this.name.length === 0){
id = 1
}else{
id=this.name[this.name.length - 1].id+1
}
//数据为0的时候 -1产生的错误 this.list.push({id,name:this.name,completed:false})
this.name=''
}
},
})
})(window);
来源：https://www.cnblogs.com/xiannv/p/10996603.html