javascript - 我如何让多个类来监听 Javascript 中的点击事件？

Question

我有多个卡片，我想在每次点击时通过 3D 转换单独旋转(不是同时)。但是，我似乎只能翻转第一个，而不能翻转后续的。

var card = document.querySelector('.card');
card.addEventListener( 'click', function() {
  card.classList.toggle('is-flipped');
});

body { font-family: sans-serif; }

.scene {
  width: 200px;
  height: 260px;
  border: 1px solid #CCC;
  margin: 40px 0;
  perspective: 600px;
}

.card {
  width: 100%;
  height: 100%;
  transition: transform 1s;
  transform-style: preserve-3d;
  cursor: pointer;
  position: relative;
}

.card.is-flipped {
  transform: rotateY(180deg);
}

.card__face {
  position: absolute;
  width: 100%;
  height: 100%;
  line-height: 260px;
  color: white;
  text-align: center;
  font-weight: bold;
  font-size: 40px;
  backface-visibility: hidden;
}

.card__face--front {
  background: red;
}

.card__face--back {
  background: blue;
  transform: rotateY(180deg);
}

<div class="scene">
  <div class="card">
    <div class="card__face card__face--front">front</div>
    <div class="card__face card__face--back">back</div>
  </div>
</div>
<div class="scene">
  <div class="card">
    <div class="card__face card__face--front">front</div>
    <div class="card__face card__face--back">back</div>
  </div>
</div>

我尝试将整个东西包装到 class="wrapper"和以下代码中，但仍然没有用:

var x = document.getElementsByClassName("wrapper").querySelectorAll(".scene");  
    x.addEventListener( 'click', function() {
    x.classList.toggle('is-flipped');

Answer 1

您正在使用 document.querySelector()，它只返回类为 card 的第一个元素。你应该使用 Document.querySelectorAll()然后 forEach() .在循环中添加事件监听器。

var cards = document.querySelectorAll('.card');
Array.from(cards).forEach(card => {
  card.addEventListener( 'click', function() {
    card.classList.toggle('is-flipped');
  });
})

body { font-family: sans-serif; }

.scene {
  width: 200px;
  height: 260px;
  border: 1px solid #CCC;
  margin: 40px 0;
  perspective: 600px;
}

.card {
  width: 100%;
  height: 100%;
  transition: transform 1s;
  transform-style: preserve-3d;
  cursor: pointer;
  position: relative;
}

.card.is-flipped {
  transform: rotateY(180deg);
}

.card__face {
  position: absolute;
  width: 100%;
  height: 100%;
  line-height: 260px;
  color: white;
  text-align: center;
  font-weight: bold;
  font-size: 40px;
  backface-visibility: hidden;
}

.card__face--front {
  background: red;
}

.card__face--back {
  background: blue;
  transform: rotateY(180deg);
}

<div class="scene">
  <div class="card">
    <div class="card__face card__face--front">front</div>
    <div class="card__face card__face--back">back</div>
  </div>
</div>
<div class="scene">
  <div class="card">
    <div class="card__face card__face--front">front</div>
    <div class="card__face card__face--back">back</div>
  </div>
</div>