Проверка массивов на эквивалентность содержимого.

example7.js

Array.isEqual = function (...arrays) {
	if (arrays.length == 0) return false;
	if (arrays.length == 1) return true;

	const ctrl = arrays[0]
		, length = ctrl.length;

	for (let i = 1; i < arrays.length; i++) {
		const array = arrays[i];

		if (length != array.length)
			return false;

		for (let j = 1; j < length; j++)
			if (!array.includes(ctrl[i]) ||
				!ctrl.includes(array[i])
			) return false;
	}

	return true;
}

console.log(Array.isEqual([], [], [])); // true
console.log(Array.isEqual([1, 2, 3], [2, 1, 3], [3, 2, 1])); // true

console.log(Array.isEqual([1, 2, 3], [2, 1, 3], [3, 2, '1'])); // false
console.log(Array.isEqual([1, 2, 3], [2, 1, 3], [3, 2, 1, 4])); // false