javascript - 悬停内容也覆盖同级 div

Question

我在 inline-block 状态下有三张图片。每当我将鼠标悬停在这些图像上时，我都希望黑色覆盖 不透明度仅出现在图像上。我重新编写了我的代码，将我对图像的描述放在 div.home-image-blocks 中，以便我能够在不同的视口(viewport)中修改它。

问题:我不确定当悬停仅应用于 img 时，为什么黑色覆盖覆盖 div.home-img-wording-blocks block 容器中的内容。我还将 max-height 设置为 100% 和 overflow: hidden。

有没有人看到我在这方面做错了什么，悬停效果显示在下面的内容上，悬停让图像超出正常视点？

$('.home-img-block img').addClass(function() {
  return (this.width / this.height > 1) ? 'wide' : 'tall';
});

#home-img-block-section {
  width: 100%;
  height: 900px;  /*changed*/
}
#home-img-blocks {
  width: 100%;
  height: 750px;
}
.home-img-block {
  width: 33.33%;
  /*height: 100%;*/
  float: left;
  display: inline-block;
  overflow: hidden;
  cursor: pointer;
  position: relative;
}
.home-img-block:hover .overlay {
  background: rgba(0, 0, 0, 0.6);
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}
.home-img-block:after {
  content: attr(data-content);
  color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  border: 1px solid #fff;
  padding: 20px 25px;
  text-align: center;
}
.home-img-block:hover:after {
  opacity: 1;
}
.home-img-block img {
  display: block;
  -webkit-transition: all 1s ease;  /* Safari and Chrome */
  -moz-transition: all 1s ease;  /* Firefox */
  -ms-transition: all 1s ease;  /* IE 9 */
  -o-transition: all 1s ease;  /* Opera */
  transition: all 1s ease;
}
.home-img-block:hover img {
  -webkit-transform: scale(1.25);  /* Safari and Chrome */
  -moz-transform: scale(1.25);  /* Firefox */
  -ms-transform: scale(1.25);  /* IE 9 */
  -o-transform: scale(1.25);  /* Opera */
  transform: scale(1.25);
  background: rgba(0, 0, 0, 0.3);
  width: 33.33%;
  max-height: 100%;
  overflow: hidden;
}
.home-img-block img.wide {
  max-width: 100%;
  max-height: 100%;
  height: auto;
  width: 100%;
}
.home-img-block img.tall {
  max-width: 100%;
  max-height: 100%;
  width: auto;
}
#home-img-block-wording-container {
  width: 100%;
  height: 300px;
}
.home-img-wording-blocks {
  width: 100%;  /* changed was 33%*/
  height: 100%;
  text-align: center;
  display: inline-block;
  vertical-align: top;
}
.home-img-wording-block-title {
  padding-top: 30px;
  font-size: 1.7em;
}
.home-img-wording-block-description {
  padding: 25px 50px 0 50px;
  font-size: 1.1em;
  color: #5d5d5d;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="home-img-block-section">
  <div id="home-img-blocks">
    <div data-content="FIND OUT MORE" class="home-img-block">
      <img src="http://optimumwebdesigns.com/images/test1.jpg">
      <div class="overlay"></div>
      <div class="home-img-wording-blocks">
        <div class="home-img-wording-block-title">WEB DESIGN</div>
        <div class="home-img-wording-block-description">The OD team can see your web design visions brought to life, creating a site that promotes your uniqueness through specific functionalities and features.</div>
      </div>
    </div>
    <div data-content="FIND OUT MORE" class="home-img-block">
      <img src="http://optimumwebdesigns.com/images/test2new.jpg">
      <div class="overlay"></div>
      <div class="home-img-wording-blocks">
        <div class="home-img-wording-block-title">ECOMMERCE</div>
        <div class="home-img-wording-block-description">Custom built solutions catered towards you end goal.</div>
      </div>
    </div>
    <div data-content="FIND OUT MORE" class="home-img-block">
      <img src="http://optimumwebdesigns.com/images/test3new.jpg">
      <div class="overlay"></div>
      <div class="home-img-wording-blocks">
        <div class="home-img-wording-block-title">MARKETING STRATEGIES</div>
        <div class="home-img-wording-block-description">MARKETING STRATEGIES</div>
      </div>
    </div>
  </div>
</div>

Answer 1

您需要将 img 和 div.overlay 单独包装到它们自己的 div 中。根据所提供的代码，覆盖元素绝对相对于包含 div.homve-img-wording-blocks 的 div.home-img-block 元素定位> 同样，设置height:100%时，表示div.home-img-block元素的全高(包括描述所占用的高度文字也)。

同样 img 也从父级派生高度，所以 max-height: 100% 意味着它可以扩展直到填满整个父级的高度(包括说明)。但是应用于元素的缩放变换仅将其高度增加 25%，因此其缩放后的高度不会超过父容器的高度，因此不会溢出。

当您将 img 和 .overlay 放入它们自己的容器元素中时，它们的高度不是基于 .home-img-block 导出的(包括描述文本)。由于我们没有在这个包装器元素上明确设置任何高度，它的高度刚好足以容纳内容，因此叠加层和图像不会溢出到描述所占据的区域。

$('.home-img-block img').addClass(function() {
  return (this.width / this.height > 1) ? 'wide' : 'tall';
});

#home-img-block-section {
  width: 100%;
  height: 900px;
}
#home-img-blocks {
  width: 100%;
  height: 750px;
}
.home-img-block {
  width: 33.33%;
  float: left;
  display: inline-block;
  overflow: hidden;
  position: relative;
}
.home-img-container {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.home-img-container:hover .overlay {
  background: rgba(0, 0, 0, 0.6);
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}
.home-img-container:after {
  content: attr(data-content);
  color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: all 0.5s;
  border: 1px solid #fff;
  padding: 20px 25px;
  text-align: center;
}
.home-img-container:hover:after {
  opacity: 1;
}
.home-img-block img {
  display: block;
  transition: all 1s ease;
}
.home-img-container:hover img {
  transform: scale(1.25);
  background: rgba(0, 0, 0, 0.3);
  width: 33.33%;
  max-height: 100%;
  overflow: hidden;
}
.home-img-block img.wide {
  max-width: 100%;
  max-height: 100%;
  height: auto;
  width: 100%;
}
.home-img-block img.tall {
  max-width: 100%;
  max-height: 100%;
  width: auto;
}
#home-img-block-wording-container {
  width: 100%;
  height: 300px;
}
.home-img-wording-blocks {
  width: 100%;
  height: 100%;
  text-align: center;
  display: inline-block;
  vertical-align: top;
}
.home-img-wording-block-title {
  padding-top: 30px;
  font-size: 1.7em;
}
.home-img-wording-block-description {
  padding: 25px 50px 0 50px;
  font-size: 1.1em;
  color: #5d5d5d;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="home-img-block-section">
  <div id="home-img-blocks">
    <div class="home-img-block">
      <div data-content="FIND OUT MORE" class='home-img-container'>
        <img src="http://optimumwebdesigns.com/images/test1.jpg">
        <div class="overlay"></div>
      </div>
      <div class="home-img-wording-blocks">
        <div class="home-img-wording-block-title">WEB DESIGN</div>
        <div class="home-img-wording-block-description">The OD team can see your web design visions brought to life, creating a site that promotes your uniqueness through specific functionalities and features.</div>
      </div>
    </div>
    <div class="home-img-block">
      <div data-content="FIND OUT MORE" class='home-img-container'>
        <img src="http://optimumwebdesigns.com/images/test2new.jpg">
        <div class="overlay"></div>
      </div>
      <div class="home-img-wording-blocks">
        <div class="home-img-wording-block-title">ECOMMERCE</div>
        <div class="home-img-wording-block-description">Custom built solutions catered towards you end goal.</div>
      </div>
    </div>
    <div class="home-img-block">
      <div data-content="FIND OUT MORE" class='home-img-container'>
        <img src="http://optimumwebdesigns.com/images/test3new.jpg">
        <div class="overlay"></div>
      </div>
      <div class="home-img-wording-blocks">
        <div class="home-img-wording-block-title">MARKETING STRATEGIES</div>
        <div class="home-img-wording-block-description">MARKETING STRATEGIES</div>
      </div>
    </div>
  </div>
</div>