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app.js
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app.js
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// HTML Elements
const statusDiv = document.querySelector('.status')
const resetDiv = document.querySelector('.reset')
const cellDivs = document.querySelectorAll('.game-cell')
// game constants
const xSymbol = '×'
const oSymbol = '○'
// game variables
let gameIsLive = true;
let xIsNext = true;
// functions
const letterToSymbol = (letter) => letter === 'x' ? xSymbol : oSymbol;
const handleWin = (letter) => {
gameIsLive = false;
if (letter === 'x') {
statusDiv.innerHTML = `${letterToSymbol(letter)} has won!`
}
else {
statusDiv.innerHTML = `<span>${letterToSymbol(letter)} has won!</span>`
}
}
const checkGameStatus = () => {
const topLeft = cellDivs[0].classList[1]
const topMiddle = cellDivs[1].classList[1]
const topRight = cellDivs[2].classList[1]
const middleLeft = cellDivs[3].classList[1]
const middleMiddle = cellDivs[4].classList[1]
const middleRight = cellDivs[5].classList[1]
const bottomLeft = cellDivs[6].classList[1]
const bottomMiddle = cellDivs[7].classList[1]
const bottomRight = cellDivs[8].classList[1]
// check winner
if (topLeft && topLeft === topMiddle && topLeft === topRight) {
handleWin(topLeft)
cellDivs[0].classList.add('won')
cellDivs[1].classList.add('won')
cellDivs[2].classList.add('won')
}
else if (middleLeft && middleLeft === middleMiddle && middleLeft === middleRight){
handleWin(middleLeft)
cellDivs[3].classList.add('won')
cellDivs[4].classList.add('won')
cellDivs[5].classList.add('won')
}
else if (bottomLeft && bottomLeft === bottomMiddle && bottomLeft === bottomRight){
handleWin(bottomLeft)
cellDivs[6].classList.add('won')
cellDivs[7].classList.add('won')
cellDivs[8].classList.add('won')
}
else if (topLeft && topLeft === middleLeft && topLeft === bottomLeft) {
handleWin(topLeft)
cellDivs[0].classList.add('won')
cellDivs[3].classList.add('won')
cellDivs[6].classList.add('won')
}
else if (topMiddle && topMiddle === middleMiddle && topMiddle === bottomMiddle) {
handleWin(topMiddle)
cellDivs[1].classList.add('won')
cellDivs[4].classList.add('won')
cellDivs[7].classList.add('won')
}
else if (topRight && topRight === middleRight && topRight === bottomRight) {
handleWin(topRight)
cellDivs[2].classList.add('won')
cellDivs[5].classList.add('won')
cellDivs[8].classList.add('won')
}
else if (topLeft && topLeft === middleMiddle && topLeft === bottomRight) {
handleWin(topLeft)
cellDivs[0].classList.add('won')
cellDivs[4].classList.add('won')
cellDivs[8].classList.add('won')
}
else if (topRight && topRight === middleMiddle && topRight === bottomLeft) {
handleWin(topRight)
cellDivs[2].classList.add('won')
cellDivs[4].classList.add('won')
cellDivs[6].classList.add('won')
}
else if(topLeft && topMiddle && topRight && middleLeft && middleMiddle && middleRight && bottomLeft && bottomMiddle && bottomRight) {
gameIsLive = false;
statusDiv.innerHTML = 'Game is tied!';
}
else {
xIsNext = !xIsNext;
if (xIsNext) {
statusDiv.innerHTML = `${xSymbol} is next`
}
else {
statusDiv.innerHTML = `<span>${oSymbol} is next</span>`
}
}
}
// event Handlers
const handleReset = () => {
xIsNext = true;
statusDiv.innerHTML = `${xSymbol} is next`
for (const cellDiv of cellDivs) {
cellDiv.classList.remove('x')
cellDiv.classList.remove('o')
cellDiv.classList.remove('won')
}
gameIsLive = true;
}
const handleCellClick = (e) => {
const classList = e.target.classList
if (!gameIsLive || classList[1] === "x" || classList[1] === "o") {
return;
}
if (xIsNext) {
classList.add('x')
checkGameStatus();
}
else {
classList.add('o')
checkGameStatus();
}
}
// event listeners
resetDiv.addEventListener('click', handleReset)
for (const cellDiv of cellDivs) {
cellDiv.addEventListener('click', handleCellClick)
}