/
script.js
67 lines (51 loc) · 1.51 KB
/
script.js
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const cards = document.querySelectorAll('.memory-card');
let hasFlippedCard = false;
let lockBoard = false;
let firstCard, secondCard;
function flipCard() {
// 剛剛沒配對成功的話,就把牌蓋起來
if (lockBoard) return;
// 避免翻同一張牌當做第二張
if (this === firstCard) return;
this.classList.add('flip');
if (!hasFlippedCard) {
hasFlippedCard = true;
firstCard = this; // this => the clicked card
return;
}
secondCard = this;
checkForMatch();
}
function checkForMatch() {
// 如果牌組配對成功 => isMatch
// 就不可以再點擊那組牌 => disableCards()
// 配對錯誤就把該牌組蓋起來 => unflipCards()
let isMatch = firstCard.dataset.framework === secondCard.dataset.framework;
isMatch ? disableCards() : unflipCards();
}
function disableCards() {
// 移除監聽事件,釋放記憶體
firstCard.removeEventListener('click', flipCard);
secondCard.removeEventListener('click', flipCard);
resetBoard();
}
function unflipCards() {
lockBoard = true;
// 把牌蓋起來
setTimeout(() => {
firstCard.classList.remove('flip');
secondCard.classList.remove('flip');
resetBoard();
}, 1500);
}
function resetBoard() {
[hasFlippedCard, lockBoard] = [false, false];
[firstCard, secondCard] = [null, null];
}
(function shuffle() {
cards.forEach(card => {
let randomPos = Math.floor(Math.random() * 12);
card.style.order = randomPos;
});
})();
cards.forEach(card => card.addEventListener('click', flipCard));