Why does setting _ expanded to true in the data I bind to the table component of iview report an error
let tempData = response.data.data;
for (let i = 0; i < tempData.length; iPP) {
tempData[i].date = tempData[i].list[0].borrow_date.substring(0, 7);
tempData[i]._expanded = true;
}
_this.data1 = tempData;