Jquery 将鼠标悬停在单个元素上时会触发多个元素

Question

我正在创建多张卡片，当我将鼠标悬停在其中一张卡片上时，卡片内的图像会变大，我已经在 Jquery 上完成了。我的问题是当我放置多张卡片并将鼠标悬停在单个卡片元素上时，所有其他卡片也会被触发。除了在 CSS?

中为每张卡片单独设置类之外，还有什么方法可以解决这个问题吗？

$(document).ready(function() {
  $('.cardjs-1,.cardjs-2').mouseover(function() {
    $('.cardimage').addClass('card-js-hover');
    $('.cards').mouseout(function() {
      $('.cardimage').removeClass('card-js-hover');
    });
  });

});

.cards-container {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  align-content: center;
  justify-content: center;
  padding: 50px;
}

.cards {
  display: grid;
  grid-template-rows: 3fr 1fr 1fr 1fr;
  align-items: center;
  text-align: center;
  width: 200px;
  height: auto;
  background: #f2f2f2;
  border-radius: 15px;
  box-shadow: 10px 10px 80px 10px #a29d9d;
  overflow: hidden;
}

.cardimage {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100px;
  height: 100px;
  border-radius: 100px;
  transition: border-radius .1s, width .1s, height .1s;
}

.card-js-hover {
  border-radius: 0;
  width: 100%;
  height: 100%;
}

.btn-book {
  padding: 15px;
  background: #F25F5C;
  color: #fff;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="cards-container">
  <div class="cards cardjs-1">

    <img src="https://images.pexels.com/photos/338515/pexels-photo-338515.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" alt="paris-image" class="cardimage">
    <h4>PARIS</h4>
    <p>0/4 days</p>
    <a class="btn-book" href="#">Book Now</a>
  </div>
  <div class="cards cardjs-2">

    <img src="https://images.pexels.com/photos/2570063/pexels-photo-2570063.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" class="cardimage">
    <h4>BERLIN</h4>
    <p>0/3 days</p>
    <a class="btn-book" href="#">Book Now</a>
  </div>
</div>

Answer 1

问题是因为您 select 正在处理所有 .cardimage 元素。只是 select 使用 this 关键字和 jQuery 的 find() 方法与悬停的 .cards 元素相关的元素。

还要注意在下面的示例中使用单个 .cards selector 和 hover() 和 toggleClass() 来简化逻辑。

$(document).ready(function() {
  $('.cards').hover(function() {
    $(this).find('.cardimage').toggleClass('card-js-hover');
  });
});

.cards-container {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  align-content: center;
  justify-content: center;
  padding: 50px;
}

.cards {
  display: grid;
  grid-template-rows: 3fr 1fr 1fr 1fr;
  align-items: center;
  text-align: center;
  width: 200px;
  height: auto;
  background: #f2f2f2;
  border-radius: 15px;
  box-shadow: 10px 10px 80px 10px #a29d9d;
  overflow: hidden;
}

.cardimage {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100px;
  height: 100px;
  border-radius: 100px;
  transition: border-radius .1s, width .1s, height .1s;
}

.card-js-hover {
  border-radius: 0;
  width: 100%;
  height: 100%;
}

.btn-book {
  padding: 15px;
  background: #F25F5C;
  color: #fff;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="cards-container">
  <div class="cards cardjs-1">
    <img src="https://images.pexels.com/photos/338515/pexels-photo-338515.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" alt="paris-image" class="cardimage">
    <h4>PARIS</h4>
    <p>0/4 days</p>
    <a class="btn-book" href="#">Book Now</a>
  </div>
  <div class="cards cardjs-2">
    <img src="https://images.pexels.com/photos/2570063/pexels-photo-2570063.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" class="cardimage">
    <h4>BERLIN</h4>
    <p>0/3 days</p>
    <a class="btn-book" href="#">Book Now</a>
  </div>
</div>

但是，值得注意的是你不需要JS。您可以单独在 CSS 中实现完全相同的效果。这样做的好处是不依赖 JS 来使 UI 工作，并且执行很多更好，因为 CSS 是硬件加速的，JS 不是。

.cards-container {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  align-content: center;
  justify-content: center;
  padding: 50px;
}

.cards {
  display: grid;
  grid-template-rows: 3fr 1fr 1fr 1fr;
  align-items: center;
  text-align: center;
  width: 200px;
  height: auto;
  background: #f2f2f2;
  border-radius: 15px;
  box-shadow: 10px 10px 80px 10px #a29d9d;
  overflow: hidden;
}

.cardimage {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100px;
  height: 100px;
  border-radius: 100px;
  transition: border-radius .1s, width .1s, height .1s;
}

.cards:hover .cardimage, 
.card-js-hover {
  border-radius: 0;
  width: 100%;
  height: 100%;
}

.btn-book {
  padding: 15px;
  background: #F25F5C;
  color: #fff;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="cards-container">
  <div class="cards cardjs-1">
    <img src="https://images.pexels.com/photos/338515/pexels-photo-338515.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" alt="paris-image" class="cardimage">
    <h4>PARIS</h4>
    <p>0/4 days</p>
    <a class="btn-book" href="#">Book Now</a>
  </div>
  <div class="cards cardjs-2">
    <img src="https://images.pexels.com/photos/2570063/pexels-photo-2570063.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" class="cardimage">
    <h4>BERLIN</h4>
    <p>0/3 days</p>
    <a class="btn-book" href="#">Book Now</a>
  </div>
</div>

Answer 2

您可以只使用 css 选择器 .cards:hover .cardimage:

.cards-container {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  align-content: center;
  justify-content: center;
  padding: 50px;
}

.cards {
  display: grid;
  grid-template-rows: 3fr 1fr 1fr 1fr;
  align-items: center;
  text-align: center;
  width: 200px;
  height: auto;
  background: #f2f2f2;
  border-radius: 15px;
  box-shadow: 10px 10px 80px 10px #a29d9d;
  overflow: hidden;
}

.cardimage {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 100px;
  height: 100px;
  border-radius: 100px;
  transition: border-radius .1s, width .1s, height .1s;
}

.cards:hover .cardimage{
  border-radius: 0;
  width: 100%;
  height: 100%;
}

.btn-book {
  padding: 15px;
  background: #F25F5C;
  color: #fff;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="cards-container">
  <div class="cards cardjs-1">

    <img src="https://images.pexels.com/photos/338515/pexels-photo-338515.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" alt="paris-image" class="cardimage">
    <h4>PARIS</h4>
    <p>0/4 days</p>
    <a class="btn-book" href="#">Book Now</a>
  </div>
  <div class="cards cardjs-2">

    <img src="https://images.pexels.com/photos/2570063/pexels-photo-2570063.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" class="cardimage">
    <h4>BERLIN</h4>
    <p>0/3 days</p>
    <a class="btn-book" href="#">Book Now</a>
  </div>
</div>

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