how to get an array and randomize code example

Example 1: js shuffle array

yourArray.sort(function() { return 0.5 - Math.random() });

Example 2: javascript random sort array

// O(n)
function shuffleArray(array) {
    for (let i = array.length - 1; i > 0; i--) {
        const j = Math.floor(Math.random() * (i + 1));
        [array[i], array[j]] = [array[j], array[i]];
    }
}