<body>
    <div class="header">
        <h1>Tic Tac Toe</h1>
    </div>

    <div class="box">
        <div class="row">
            <input class="btn" type="text" readonly>
            <input class="btn" type="text" readonly>
            <input class="btn" type="text" readonly>
        </div>
        <div class="row">
            <input class="btn" type="text" readonly>
            <input class="btn" type="text" readonly>
            <input class="btn" type="text" readonly>
        </div>
        <div class="row">
            <input class="btn" type="text" readonly>
            <input class="btn" type="text" readonly>
            <input class="btn" type="text" readonly>
        </div>

    </div>

    <p class="result">Player X Turn</p>

    <div class="reset">
        <button id="reset">Reset</button>
    </div>
  
</body>
@import url('https://fonts.googleapis.com/css2?family=Radio+Canada:wght@400;500;600;700&display=swap');

* {
    padding: 0;
    margin: 0;
    font-family: 'Radio Canada', sans-serif;
}

body {
    background-color: white;
}

.header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 15px;
}

.header h1 {
    text-align: center;
}

.box {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    margin: 35px;
}

.row {
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn {
    border: 1px solid black;
    border-radius: 5px;
    height: 75px;
    margin: 2px;
    width: 75px;
    text-align: center;
    font-size: 50px;
    font-weight: 500;
}

.btn:hover {
    cursor: pointer;
    background-color: rgb(240, 240, 240);
}

.btn:disabled {
    color: black;
    cursor: no-drop;
}

.result {
    text-align: center;
}

.reset {
    text-align: center;
}

#reset {
    border: 1px solid black;
    cursor: pointer;
    color: black;
    background-color: white;
    border-radius: 5px;
    padding: 5px 20px;
    font-size: 17px;
    margin: 35px;
    transition: all 0.1s ease-in-out;
}

#reset:hover {
    color: white;
    background-color: black;
}
let cells = ['', '', '', '', '', '', '', '', ''];
let currentPlayer = 'X';
let result = document.querySelector('.result');
let btns = document.querySelectorAll('.btn');
let conditions = [
    [0, 1, 2],
    [3, 4, 5],
    [6, 7, 8],
    [0, 3, 6],
    [1, 4, 7],
    [2, 5, 8],
    [0, 4, 8],
    [2, 4, 6]
];

const ticTacToe = (element, index) => {
    element.value = currentPlayer;
    element.disabled = true;
    cells[index] = currentPlayer;
    currentPlayer = currentPlayer == 'X' ? 'O' : 'X';
    result.innerHTML = `Player ${currentPlayer} Turn`;

    for (let i = 0; i < conditions.length; i++) {
        let condition = conditions[i];
        let a = cells[condition[0]];
        let b = cells[condition[1]];
        let c = cells[condition[2]];

        if (a == '' || b == '' || c == '') {
            continue;
        }

        if ((a == b) && (b == c)) {
            result.innerHTML = `Player ${a} Won 🎉`;
            btns.forEach((btn) => btn.disabled = true);
        }
    }
};

function reset() {
    cells = ['', '', '', '', '', '', '', '', ''];
    btns.forEach((btn) => {
        btn.value = '';
    });
    currentPlayer = 'X';
    result.innerHTML = `Player X Turn`;
    btns.forEach((btn) => btn.disabled = false);
};

document.querySelector('#reset').addEventListener('click', reset);

btns.forEach((btn, i) => {
    btn.addEventListener('click', () => ticTacToe(btn, i));
});

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.