為什么我給iview的table組件綁定的數(shù)據(jù)中把_expanded設(shè)為true會報錯
let tempData = response.data.data;

    for (let i = 0; i < tempData.length; i++) {
      tempData[i].date = tempData[i].list[0].borrow_date.substring(0, 7);
      tempData[i]._expanded = true;
    }
    _this.data1 = tempData;