Queue Implementation in JavaScript

function Queue() {
    this.reset();
}

Queue.prototype.dequeue = function () {
    if (this.empty() !== true) {
        this.length -= 1;
        return this.items.shift();
    }
    return undefined;
};
 
Queue.prototype.enqueue = function (item) {
    this.items.push(item);
    this.length += 1;
    return true;
};
 
Queue.prototype.empty = Stack.prototype.empty;
Queue.prototype.reset = Stack.prototype.reset;