removeCost: function (item) {

  let index = this.form.addReceiptsCostVOList.indexOf(item)
    let ids = []
  for (var i = 0; i < this.form.addReceiptsCostVOList.length; i++) {
    ids.push(item.costId)
    this.form.delCostIds = ids
  }
  if (index !== -1) {
      this.form.addReceiptsCostVOList.splice(index, 1)
    }
      console.log('form', this.form)
}
想着在删除一条数据后，获取删除数据的id,组成一个数组，怎么删除多条数据，获取多个id ,怎么设置循环条件