Move item in an array JS

move.js

const moveInArray = (arr, from, to) => {
	if (to >= arr.length) {
		var k = to - arr.length + 1
		while (k--) {
			arr.push(undefined)
		}
	}
	arr.splice(to, 0, arr.splice(from, 1)[0])
	return arr
}