app.js

/*
GAME RULES:

- The game has 2 players, playing in rounds
- In each turn, a player rolls a dice as many times as he whishes. Each result get added to his ROUND score
- BUT, if the player rolls a 1, all his ROUND score gets lost. After that, it's the next player's turn
- The player can choose to 'Hold', which means that his ROUND score gets added to his GLBAL score. After that, it's the next player's turn
- The first player to reach 100 points on GLOBAL score wins the game

*/

var scores, roundScore, activePlayer;

init();

document.querySelector('.btn-roll').addEventListener('click', function () {
    var dice = Math.floor(Math.random() * 6) + 1;

    var diceDom = document.querySelector('.dice');
    diceDom.style.display = 'block'
    diceDom.src = 'dice-' + dice + '.png';

    if (dice !== 1) {
        roundScore += dice;
        document.querySelector('#current-' + activePlayer).textContent = roundScore;
    } else {
        nextPlayer();
    }
})

document.querySelector('.btn-hold').addEventListener('click', function (){

    scores[activePlayer] += roundScore;
    document.getElementById('score-' + activePlayer).textContent = scores[activePlayer];
    if (scores[activePlayer] >= 100) {
        alert('Player ' + (activePlayer + 1)  + ' won the game!');
        hideDice();
        document.querySelector('.btn-roll').disabled = true;
        document.querySelector('.btn-hold').disabled = true;

    } else {
        nextPlayer();
    }
    
})

document.querySelector('.btn-new').addEventListener('click', init);

function nextPlayer (){
    activePlayer === 0 ? activePlayer = 1 : activePlayer = 0;
    roundScore = 0;

    document.getElementById('current-0').textContent = '0';
    document.getElementById('current-1').textContent = '0';

    document.querySelector('.player-0-panel').classList.toggle('active');
    document.querySelector('.player-1-panel').classList.toggle('active');

    hideDice();
}

function hideDice (){
    document.querySelector('.dice').style.display = 'none';
}

function init () {
    scores = [0,0];
    roundScore = 0;
    activePlayer = 0;
    
    document.querySelector('.dice').style.display = 'none';
    
    document.getElementById('score-0').textContent = 0;
    document.getElementById('score-1').textContent = 0;
    document.getElementById('current-0').textContent = 0;
    document.getElementById('current-1').textContent = 0;
    
    document.querySelector('.player-0-panel').classList.add('active');
    document.querySelector('.player-1-panel').classList.remove('active');
    document.querySelector('.btn-roll').disabled = false;
    document.querySelector('.btn-hold').disabled = false;
}