Quick Gist of Uno deck

uno.js

class Deck {
    constructor(...suits) {
        let self = [],
            uuid = (...values) => values.join('-') + '-' + Math.random().toString(36).replace(/^\d*\./, '').slice(-4),
            properties = { configurable: false, enumerable: false, writable: false };

        for(let suit of suits) {
            // Cards that have 2 copies (suit-oriented)
            for(let card of [1, 2, 3, 4, 5, 6, 7, 8, 9, 'A', 'B', 'C'])
                self.push(
                    { value: card, owner: null, uuid: uuid(suit, card), suit },
                    { value: card, owner: null, uuid: uuid(suit, card), suit }
                );
            // Cards that have 1 copy (suit-oriented)
            for(let card of [0])
                self.push({ value: card, owner: null, uuid: uuid(suit, card), suit });
            // Cards that have 4 copies (suit-free)
            for(let card of ['D', 'E'])
                self.push({ value: card, owner: null, uuid: uuid(suit, card) });
        }

        self = self.sort(() => Math.random() >= 0.5? +1: -1);

        for(let card of self)
            this[card.uuid] = card;

        for(let property of 'length'.split(' '))
            Object.defineProperty(this, property, { value: self[property], ...properties });

        Object.defineProperty(this, '__introspection__', { value: [...self], ...properties });

        return this;
    }

    shuffle() {
        let self = this.__introspection__;

        this.__introspection__ = self = self.sort(() => Math.random() >= 0.5? +1: -1);

        for(let card of self)
            this[card] = self[card];

        return this;
    }
}

/* 0-9, A (skip), B (reverse), C (+2), D (wild), E (+4 & wild) */
let Uno = new Deck('red', 'yellow', 'green', 'blue');