vue添加后端接口里不存在的字段

async getList() {
      this.listLoading = true
      const { data } = await fetchList(this.listQuery)
      const items = data.items
      this.list = items.map(v => {
        this.$set(v, 'edit', false) // https://vuejs.org/v2/guide/reactivity.html
        v.originalTitle = v.title //  will be used when user click the cancel botton
        return v
      })
      this.listLoading = false
    },