vue.js - vue 计算 : add new computed value from created lifecycle hook

Question

我是vue初学者

我正在尝试使用 name 推送计算数据，该名称来自创建实例后出现的 vuex

如何将新的计算属性推送到 created() Hook 中的实例？？

这是代码

computed: {
            // 3 - i want to extract the object properties here computed 
            // that is easy bu using spread operator ...
            // Problem : vue intialize computed before the created() hook
            // so the spreed work befor passing the filling the object
            ...this.mapGettersObj
        },

        created(){
            // 1- i can access only this line after creating the object
            this.stocks = this.$store.state
            let arr=[]
            for (let stock in this.stocks){
                arr.push(stock+'Getter')
            }
            // 2 - mapGetters returns an object
            this.mapGettersObj=mapGetters(arr)
        }

如果我可以在创建后创建新的计算值就可以解决问题

Answer 1

你可以在 beforeCreate 钩子(Hook)中这样做。

beforeCreate: function() {
  this.$options.computed = {
     demo2: function() {
       return this.demo
     }
  }
}