@orodio/interleave Install yarn add @orodio/interleave Use import { interleave } from '@orodio/interleave' const arr1 = [1, 2, 3, 4, 5] const arr2 = ["a", "b", "c", "d"] const arr3 = interleave(arr1, arr2) const arr4 = [1, "a", 2, "b", 3, "c", 4, "d", 5] assert(arr3, arr4)