html-使用CSS从下至上对div进行动画处理

我需要为从下到上的div设置动画.
这种情况：
我有一个缩略图,其中包含电影的标题和描述.我想隐藏描述,仅在用户将鼠标悬停在其上时显示.

我尝试调整容器的高度,但将值设置为“自动”时,您无法设置其动画效果,并且我无法提供具体的大小,因为每个电影的标题可能会有所不同.
众所周知,您无法使用“底部”和“顶部”属性从底部到顶部进行动画处理.

这是html：

<div class="thumbnail-component">
  <img class="thumbnail-component__background" src="background.jpg" alt="">
  <div class="thumbnail-component__gradient"></div>
  <div class="text">

    <div class="text__content">
        <p class="text__title">The movie title</p>
        <div class="text__separator"></div>
        <p class="text__description">
            Lorem ipsum dolor sit amet,consectetur adipiscing elit,sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
        </p>
        <p class="text__author">Published by Author</p>
    </div>
</div>

这是我要完成的工作的图像：

老实说,我完全迷路了,我想我尝试了一切.
对不起,我的英语不太好.

最佳答案

完全灵活且响应迅速
没有硬编码或任意高度,不涉及JS.

基本上,

>将标题转换为-100％,悬停动画为0
>将标题和内容都包装到DIV中(即：.anim)
>将.anim转换为100％,然后悬停将其动画为0

全页打开示例以查看发生的情况及其工作方式：

/*QuickReset*/*{margin:0;Box-sizing:border-Box;}

.thumb {
  width: 140px;
  background: #eee;
}

.anim {
  transition: 0.5s;
  transform: translateY(100%);
}

.title {
  color: red;
  transition: 0.5s;
  transform: translateY(-100%);
}

.author {
  color: blue;
}

/* ANIMATE */

.thumb:hover .anim,.thumb:hover .title {
  transform: translateY(0);
}

<div class="thumb">
  <div class="anim">
    <div class="title">The movie even longer title</div>
    <div class="description">
      Text lenghts of Title and Author or even Description do not matter. They will all perfectly accommodate into .thumb on hover
    </div>
  </div>
  <div class="author">Published by super long some Author</div>
</div>

FlexBox网格！

概念的真实案例示例：

/*QuickReset*/

* {
  margin: 0;
  Box-sizing: border-Box;
}

html {
  height: 100%
}

body {
  min-height: 100%;
  font: 14px/1.4 sans-serif;
}

.grid-3 {
  display: flex;
  flex-flow: row wrap;
}

.thumb {
  display: flex;
  flex-flow: column nowrap;
  position: relative;
  overflow: hidden;
  width: 33.333%;
  color: #fff;
}

.thumb-gradient,.thumb-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumb-gradient {
  background: linear-gradient(to bottom,rgba(0,0.24) 0%,0.56) 100%);
}

.thumb-anim {
  margin-top: auto;  /* pushes all content to bottom */
  position: relative;
  transition: 0.5s;
  transform: translateY(100%);
}

.thumb-title {
  text-transform: uppercase;
  padding: 20px;
  transition: 0.5s;
  transform: translateY(-100%);
}

.thumb-description {
  padding: 10px 20px;
  transition: 0.5s;
  opacity: 0;
  flex: 1;
}

.thumb-author {
  padding: 20px;
  position: relative;
}


/* ANIMATE */

.thumb:hover .thumb-anim {
  transform: translateY(0);
}

.thumb:hover .thumb-title {
  transform: translateY(0%);
}

.thumb:hover .thumb-description {
  opacity: 1;
}

<div class="grid-3">

  <div class="thumb">
    <img class="thumb-img" src="http://placekitten.com/300/300" alt="Catz!">
    <div class="thumb-gradient"></div>
    <div class="thumb-anim">
      <h3 class="thumb-title">The movie title</h3>
      <p class="thumb-description">
        Text lenghts of Title and Author or even Description do not matter. They will all perfectly accommodate into .thumb on hover
      </p>
    </div>
    <div class="thumb-author">Published by super long some Author</div>
  </div>

  <div class="thumb">
    <img class="thumb-img" src="http://placekitten.com/400/300" alt="Catz!">
    <div class="thumb-gradient"></div>
    <div class="thumb-anim">
      <h3 class="thumb-title">The movie title</h3>
      <p class="thumb-description">
        The row heights are dictated by the tallest in the horizontal group
      </p>
    </div>
    <div class="thumb-author">Published</div>
  </div>

  <div class="thumb">
    <img class="thumb-img" src="http://placekitten.com/230/300" alt="Catz!">
    <div class="thumb-gradient"></div>
    <div class="thumb-anim">
      <h3 class="thumb-title">The movie title a super long title here</h3>
      <p class="thumb-description">
        Lorem ipsum dolor sit amet,consectetur adipisicing elit. Repellendus facilis beatae,numquam aliquam eveniet. Iure porro provident itaque hic quae tempora. Quaerat doloribus dolore facilis similique,soluta asperiores quas sapiente.
      </p>
    </div>
    <div class="thumb-author">Published by super long some Author</div>
  </div>

  <div class="thumb">
    <img class="thumb-img" src="http://placekitten.com/270/300" alt="Catz!">
    <div class="thumb-gradient"></div>
    <div class="thumb-anim">
      <h3 class="thumb-title">The movie title</h3>
      <p class="thumb-description">
        Text lenghts of Title and Author or even Description do not matter. They will all perfectly accommodate into .thumb on hover
      </p>
    </div>
    <div class="thumb-author">Published by super long some Author</div>
  </div>

  <div class="thumb">
    <img class="thumb-img" src="http://placekitten.com/250/370" alt="Catz!">
    <div class="thumb-gradient"></div>
    <div class="thumb-anim">
      <h3 class="thumb-title">The movie title</h3>
      <p class="thumb-description">
        Text lenghts of Title and Author or even Description do not matter. They will all perfectly accommodate into .thumb on hover
      </p>
    </div>
    <div class="thumb-author">Yep. Lorem ipsum dolor sit amet,consectetur adipisicing elit. Cupiditate sequi aspernatur cumque SAEpe incidunt enim,nihil dolores ipsam numquam architecto velit labore quod laboriosam aliquam distinctio tempora unde ad totam.</div>
  </div>

  <div class="thumb">
    <img class="thumb-img" src="http://placekitten.com/290/340" alt="Catz!">
    <div class="thumb-gradient"></div>
    <div class="thumb-anim">
      <h3 class="thumb-title">The movie title</h3>
      <p class="thumb-description">
        Text lenghts of Title and Author or even Description do not matter. They will all perfectly accommodate into .thumb on hover
      </p>
    </div>
    <div class="thumb-author">Published by super long some Author</div>
  </div>

</div>

原文链接：https://www.f2er.com/html/530475.html

html-使用CSS从下至上对div进行动画处理

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