let arry = this.tableData
let arryNew = []
arry.map((item, index) => {
arryNew.push(Object.assign({}, item, { lineId: 1 }))
})
以上代碼遍歷數組tableData,併爲每一項加入一個新屬性lineId ,值爲1
tableData: [{
name: '1',
id: '1'
}, {
name: '2',
id: '2'
}, {
name: '3',
id: '3'
}]