arrayEqual.js

export const arrayEqual = (arr1, arr2) => {
    // If either item is falsey we can short circuit and warn
    if (!arr1 || !arr2) {
        console.warn('arrayEqual(): One of the supplied arrays is falsey.');
        return false;
    }

    // If they're equal we can short circuit
    if (arr1 === arr2) return true;

    // If the lengths are different we can short circuit
    if (arr1.length !== arr2.length) return false;

    // Loop through every item in array 2
    for (let i = 0; i < arr2.length; i++) {
        // If the first array doesn't contain the current
        // item, the arrays are not equal.
        if (!arr1.includes(arr2[i])) {
            return false;
        }
    }

    // We got this far - the arrays must be the same!
    return true;
};