let arr10 = [ { id: 1, value: 'aa' }, { id: 2, value: 'bb' } ] let arr20 = [ { id: 5, value: 'cc' }, ] // 判断数组arr20、arr10中存不存在id相同的项 function noInArr(arr1, arr2) { let res = false let ids = arr2.map(i => i.id) ids.forEach(id => { arr1.forEach(item => { if (item.id === id) { res = true } }) }) return res } console.log(noInArr(arr10, arr20))
