Playing Cards JS Advanced

function createCard(face, suit) {
    // Define valid faces and suits
    const validFaces = ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K', 'A'];
    const validSuits = ['S', 'H', 'D', 'C'];

    // Check if the provided face and suit are valid
    if (validFaces.includes(face) && validSuits.includes(suit)) {
        const card = {
            face,
            suit,
            toString() {
                // Use Unicode symbols for suits
                const suitSymbol = {
                    'S': '\u2660', // Spades
                    'H': '\u2665', // Hearts
                    'D': '\u2666', // Diamonds
                    'C': '\u2663'  // Clubs
                };

                return `${this.face}${suitSymbol[this.suit]}`;
            }
        };

        return card;
    } else {
        throw new Error("Error");
    }
}