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script.js
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script.js
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const cards = document.querySelectorAll('.card');
let hasFlippedCard = false;
let firstCard, secondCard;
let lockBoard = false;
function flipCard() {
if(lockBoard) return;
if(this === firstCard) return;
this.classList.add('flip');
if(!hasFlippedCard) { /*If it's false, then the first card is selected */
hasFlippedCard = true;
firstCard = this;
return;
}
secondCard = this;
hasFlippedCard = false;
checkForMath();
}
function checkForMath() {
if(firstCard.dataset.card === secondCard.dataset.card ){
disableCards();
return;
}
unflipCards();
}
function disableCards() {
firstCard.removeEventListener('click', flipCard);
secondCard.removeEventListener('click', flipCard);
resetBoard();
}
function unflipCards(){
lockBoard = true;
setTimeout(() => {
firstCard.classList.remove('flip');
secondCard.classList.remove('flip');
resetBoard();
}, 1500);
}
function resetBoard(){
[hasFlippedCard, lockBoard] = [false, false];
[firstCard, secondCard] = [null, null];
}
/*Immediately invoked function - Read more about it */
(function shuffle(){
cards.forEach((card) => {
let randomPosition = Math.floor(Math.random() * 12);
card.style.order = randomPosition;
})
})();
cards.forEach((card) => {
card.addEventListener('click', flipCard);
})