2020-10-20转化成固定个数的二维数组

computed:{
    pages(){
      const pages = []
      this.list.forEach((item,index)=>{
        const page = Math.floor(index/8)
        if(!pages[page]){
          pages[page] = []
        }
        pages[page].push(item)
      })
      return pages
    }
  }