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index.js
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index.js
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window.addEventListener('DOMContentLoaded', () =>{
const tiles = Array.from(document.querySelectorAll('.tile'));
const playerDisplay = document.querySelector('.display-player');
const resetButton = document.querySelector('#reset');
const announcer = document.querySelector('.announcer');
// variables which we will need
let board = ['','','','','','','','',''];
let currentPlayer = 'X';
let isGameActive = true;
// strings needed for announcement of winner
const PLAYERX_WON = 'PLAYERX_WON';
const PLAYERO_WON = 'PLAYERO_WON';
const TIE = 'TIE';
// now lets store all our winning conditions
const winningConditions = [
[0,1,2],
[3,4,5],
[6,7,8],
[0,3,6],
[1,4,7],
[2,5,8],
[0,4,8],
[2,4,6],
];
function handleResultValidation() {
let roundWon = false;
for(let i=0; i <= 7; i++) {
const winCondition = winningConditions[i];
const a = board[winCondition[0]];
const b = board[winCondition[1]];
const c = board[winCondition[2]];
if(a == '' || b == '' || c == '') {
continue;
}
if(a === b && b === c){
roundWon = true;
break;
}
}
if(roundWon) {
announce(currentPlayer === 'X' ? PLAYERX_WON : PLAYERO_WON);
isGameActive = false;
return;
}
if(!board.includes(''))
announce(TIE);
}
const announce = (type) => {
switch(type){
case PLAYERO_WON:
announcer.innerHTML = 'Player <span class="playerO">O</span> Won';
break;
case PLAYERX_WON:
announcer.innerHTML = 'Player <span class="playerX">X</span> Won';
break;
case TIE:
announcer.innerHTML = 'Tie';
}
announcer.classList.remove('hide');
};
const isValidAction = (tile) => {
if(tile.innerHTML === 'X' || tile.innerHTML === 'O'){
return false;
}
return true;
};
const updateBoard = (index) => {
board[index] = currentPlayer;
}
const changePlayer = () => {
playerDisplay.classList.remove(`player${currentPlayer}`);
currentPlayer = currentPlayer === 'X' ? 'O' : 'X';
playerDisplay.innerHTML = currentPlayer;
playerDisplay.classList.add(`player${currentPlayer}`);
}
const userAction = (tile, index) => {
if(isValidAction(tile) && isGameActive){
tile.innerHTML = currentPlayer;
tile.classList.add(`player${currentPlayer}`);
updateBoard(index);
handleResultValidation();
changePlayer();
}
}
const resetBoard = () => {
board = ['','','','','','','','',''];
isGameActive = true;
announcer.classList.add('hide');
if(currentPlayer === 'O')
{
changePlayer();
}
tiles.forEach(tile => {
tile.innerHTML = '';
tile.classList.remove('playerX');
tile.classList.remove('playerO');
});
}
tiles.forEach( (tile, index) => {
tile.addEventListener('click', () => userAction(tile, index));
});
// tile reference here is used for updating the UI and index will be useful to update the board in memory
resetButton.addEventListener('click', resetBoard);
});