评论按日期排序

 async getComment() {
      const res = await this.$http.getComment(this.id, { limit: 100 })
      res.data.message.sort((a, b) => {
        return Date.parse(b.add_time) - Date.parse(a.add_time)
      })
      this.comment = res.data.message
      console.log(this.comment)
    },

sort 结合 Date.parse 排序