财产“排名”我刚开始学习javascipt的,在这个错误的教程中间很为难:遗漏的类型错误:无法读取的不确定
我试图创造各种各样的小游戏,我翻转卡和查找匹配。
我有一个数组中的对象,并试图根据选择哪个卡(对象)来调用'rank'的特定值。
在控制台中运行代码给我一个错误: 未捕获TypeError:无法读取未定义的属性'等级'。
的Javascript:
console.log("Up and running");
var cards = [
{
rank: "queen",
suit: "hearts",
cardImage: "images/queen-of-hearts.png"
},
{
rank: "queen",
suit: "diamonds",
cardImage: "images/queen-of-diamonds.png"
},
{
rank: "king",
suit: "hearts",
cardImage: "images/king-of-hearts.png"
},
{
rank: "king",
suit: "diamonds",
cardImage: "images/king-of-diamonds.png"
}
];
var cardsInPlay = [];
var checkForMatch = function() {
if (cardsInPlay[0] === cardsInPlay[1]) {
alert("You found a match!");
} else alert("Sorry, try again");
}
var flipCard = function(cardId) {
console.log("User flipped " + cards[cardId].rank);
/*issue is with calling the rank*/
console.log(cards[cardId].cardImage);
console.log(cards[cardId].suit);
cardsInPlay.push(cards[cardId].rank);
if (cardsInPlay.length === 2) {
checkForMatch();
};
}
var createBoard = function() {
for (var i = 0; i < cards.length; i ++) {
var cardElement = document.createElement('img');
cardElement.setAttribute("img", "images/back.png");
cardElement.setAttribute("data-id", i);
cardElement.addEventListener("click", flipCard());
document.getElementById("game-board").appendChild(cardElement);
}
}
createBoard();
flipCard(0);
flipCard(2);
是我的错误是由于我把银行卡使用[CardId中] .rank从对象价值的方式?
活页片功能需要一个CardId中的参数,当你调用上单击事件'flipcard'你不传递任何参数,它是不确定的。 – Gntem