computed的原始模式 : get 和 set

        // 完整的写法:
        fullname: {
          get: function() {
            return this.firstname + " " + this.lastname
          },
          set: function(value) {
            const names = value.split(" ")
            this.firstname = names[0]
            this.lastname = names[1]
          }
        }    

标签：function,set,computed,firstname,get,lastname,names
来源： https://www.cnblogs.com/qd-lbxx/p/16592529.html