Fisher-Yates アルゴリズムを使用して JavaScript で配列を効率的にシャッフルするにはどうすればよいですか?

/**
 * Shuffles an array in place.
 * @param {Array} a Array containing the elements to be shuffled.
 */
function shuffle(a) {
    for (let i = a.length - 1; i > 0; i--) {
        const j = Math.floor(Math.random() * (i + 1));
        [a[i], a[j]] = [a[j], a[i]];
    }
    return a;
}

/**
 * Shuffles an array in place. ES6 version.
 * @param {Array} a Array containing the elements to be shuffled.
 */
function shuffle(a) {
    for (let i = a.length - 1; i > 0; i--) {
        const j = Math.floor(Math.random() * (i + 1));
        [a[i], a[j]] = [a[j], a[i]];
    }
    return a;
}

Object.defineProperty(Array.prototype, 'shuffle', {
    value: function() {
        for (let i = this.length - 1; i > 0; i--) {
            const j = Math.floor(Math.random() * (i + 1));
            [this[i], this[j]] = [this[j], this[i]];
        }
        return this;
    }
});

let myArray = ['1', '2', '3', '4', '5', '6', '7', '8', '9'];
shuffle(myArray);