javascript - 根据高度div向上移动div给他

Question

我正在制作信息横幅。有几个 div 彼此重叠，上面有一个悬停 mask 。在悬停时，他们会更改文本。有时悬停文本会比父级长，悬停文本下方的 div 应移动到悬停文本下方。

div.quick-banner {
  width: 440px;
  margin: 0 0 0 15px;
  position: relative;
}
div.quick-banner div.mask-banner {
  width: 420px;
  position: absolute;
  top: 0;
  left: 0;
  padding: 10px;
  text-align: center;
}
div.quick-banner div.mask-banner h2 {
   color: #fff;
   text-align: center;
   position: relative;
   font-size: 17px;
   padding: 3px;
   background: rgba(0, 0, 0, 0.8);
   margin: 0;
}
div.quick-banner div.mask-banner {
   -ms-filter: "progid: DXImageTransform.Microsoft.Alpha(Opacity=0)";
   filter: alpha(opacity=0);
   opacity: 0;
   background-color: #004f6e;
   -webkit-transition: all 0.4s ease-in-out;
   -moz-transition: all 0.4s ease-in-out;
   -o-transition: all 0.4s ease-in-out;
   -ms-transition: all 0.4s ease-in-out;
   transition: all 0.4s ease-in-out;
}
div.quick-banner:hover div.mask-banner {
   -ms-filter: "progid: DXImageTransform.Microsoft.Alpha(Opacity=100)";
   filter: alpha(opacity=100);
   opacity: 1;
}
div.quick-banner div.mask-banner h2 {
   -webkit-transform: translateY(-100px);
   -moz-transform: translateY(-100px);
   -o-transform: translateY(-100px);
   -ms-transform: translateY(-100px);
   transform: translateY(-100px);
   -ms-filter: "progid: DXImageTransform.Microsoft.Alpha(Opacity=0)";
   filter: alpha(opacity=0);
   opacity: 0;
   -webkit-transition: all 0.2s ease-in-out;
   -moz-transition: all 0.2s ease-in-out;
   -o-transition: all 0.2s ease-in-out;
   -ms-transition: all 0.2s ease-in-out;
   transition: all 0.2s ease-in-out;
}
div.quick-banner div.mask-banner:hover h2,
div.quick-banner div.mask-banner:hover p,
div.quick-banner div.mask-banner:hover a.info {
   -ms-filter: "progid: DXImageTransform.Microsoft.Alpha(Opacity=100)";
   filter: alpha(opacity=100);
   opacity: 1;
   -webkit-transform: translateY(0px);
   -moz-transform: translateY(0px);
   -o-transform: translateY(0px);
   -ms-transform: translateY(0px);
   transform: translateY(0px);
}
div.quick-banner div.mask-banner p {
   -webkit-transform: translateY(100px);
   -moz-transform: translateY(100px);
   -o-transform: translateY(100px);
   -ms-transform: translateY(100px);
   transform: translateY(100px);
   -ms-filter: "progid: DXImageTransform.Microsoft.Alpha(Opacity=0)";
   filter: alpha(opacity=0);
   opacity: 0;
   -webkit-transition: all 0.2s linear;
   -moz-transition: all 0.2s linear;
   -o-transition: all 0.2s linear;
   -ms-transition: all 0.2s linear;
   transition: all 0.2s linear;
}

<div class="quick-banner">
    <div class="main-banner">
        <h2>Head 1</h2>
        <p>This is first text of first banner.</p>
    </div>
    <div class="mask-banner">
        <h2>Head HOVER 1</h2>
        <p>Text after hover longer (3-5 rows). Text after hover       longer (3-5 rows). Text after hover longer (3-5 rows). Text after hover longer (3-5 rows)</p>
    </div>
</div>
<div class="quick-banner">
    <div class="main-banner">
        <h2>Head 2</h2>
        <p>This is first text of first banner.</p>
    </div>
    <div class="mask-banner">
        <h2>Head HOVER 2</h2>
        <p>Text after hover longer (3-5 rows). Text after hover       longer (3-5 rows). Text after hover longer (3-5 rows). Text after hover longer (3-5 rows)</p>
    </div>
</div>

在悬停时，我更改了主横幅和 mask 横幅的不透明度，这是有效的，但第二个 div 出现在悬停的文本上。 是否有解决方案(纯 CSS 最好)根据悬停文本的相对高度将下一个 div 移动到悬停 div 下？

Answer 1

您将无法为 .mask-banner 使用 position: absolute;，因为它会将其从文档流中移除，而其他元素不会注意它。您可以通过以下方式解决此问题:

• 将 hover 检测移动到父级 .quick-banner
• 在流程中保持.mask-banner(不要使用position: absolute;)
• .quick-banner悬停时隐藏.main-banner的内容

要保持动画完整，您将无法使用 display: none; 隐藏 mask-banner，因此您可以使用 height 来做到这一点: 0; 和 overflow: hidden; 代替。

div.quick-banner {
    width: 440px;
    margin: 0 0 0 15px;
    position: relative;
}
div.quick-banner div.mask-banner {
    width: 420px;
    position: relative; /*Change this*/
    top: 0;
    left: 0;
    padding: 0; /*Change this*/
    text-align: center;
    height: 0; /*Add this*/
    overflow: hidden; /*Add this*/
}
div.quick-banner div.mask-banner h2 {
    color: #fff;
    text-align: center;
    position: relative;
    font-size: 17px;
    padding: 3px;
    background: rgba(0, 0, 0, 0.8);
    margin: 0;
}
div.quick-banner div.mask-banner {
    -ms-filter:"progid: DXImageTransform.Microsoft.Alpha(Opacity=0)";
    filter: alpha(opacity=0);
    opacity: 0;
    background-color: #004f6e;
    -webkit-transition: all 0.4s ease-in-out;
    -moz-transition: all 0.4s ease-in-out;
    -o-transition: all 0.4s ease-in-out;
    -ms-transition: all 0.4s ease-in-out;
    transition: all 0.4s ease-in-out;
}
div.quick-banner:hover div.mask-banner {
    -ms-filter:"progid: DXImageTransform.Microsoft.Alpha(Opacity=100)";
    filter: alpha(opacity=100);
    opacity: 1;
    height: auto; /*Add this*/
    padding: 10px; /*Add this*/
}
div.quick-banner div.mask-banner h2 {
    -webkit-transform: translateY(-100px);
    -moz-transform: translateY(-100px);
    -o-transform: translateY(-100px);
    -ms-transform: translateY(-100px);
    transform: translateY(-100px);
    -ms-filter:"progid: DXImageTransform.Microsoft.Alpha(Opacity=0)";
    filter: alpha(opacity=0);
    opacity: 0;
    -webkit-transition: all 0.2s ease-in-out;
    -moz-transition: all 0.2s ease-in-out;
    -o-transition: all 0.2s ease-in-out;
    -ms-transition: all 0.2s ease-in-out;
    transition: all 0.2s ease-in-out;
}
/*Change this*/
div.quick-banner:hover div.mask-banner h2, div.quick-banner:hover div.mask-banner p, div.quick-banner:hover div.mask-banner a.info {
    -ms-filter:"progid: DXImageTransform.Microsoft.Alpha(Opacity=100)";
    filter: alpha(opacity=100);
    opacity: 1;
    -webkit-transform: translateY(0px);
    -moz-transform: translateY(0px);
    -o-transform: translateY(0px);
    -ms-transform: translateY(0px);
    transform: translateY(0px);
}
div.quick-banner div.mask-banner p {
    -webkit-transform: translateY(100px);
    -moz-transform: translateY(100px);
    -o-transform: translateY(100px);
    -ms-transform: translateY(100px);
    transform: translateY(100px);
    -ms-filter:"progid: DXImageTransform.Microsoft.Alpha(Opacity=0)";
    filter: alpha(opacity=0);
    opacity: 0;
    -webkit-transition: all 0.2s linear;
    -moz-transition: all 0.2s linear;
    -o-transition: all 0.2s linear;
    -ms-transition: all 0.2s linear;
    transition: all 0.2s linear;
}
/*Add this*/
div.quick-banner:hover div.main-banner {
    display: none;
}

<div class="quick-banner">
    <div class="main-banner">
         <h2>Head 1</h2>

        <p>This is first text of first banner.</p>
    </div>
    <div class="mask-banner">
         <h2>Head HOVER 1</h2>

        <p>Text after hover longer (3-5 rows). Text after hover longer (3-5 rows). Text after hover longer (3-5 rows). Text after hover longer (3-5 rows)</p>
    </div>
</div>
<div class="quick-banner">
    <div class="main-banner">
         <h2>Head 2</h2>

        <p>This is first text of first banner.</p>
    </div>
    <div class="mask-banner">
         <h2>Head HOVER 2</h2>

        <p>Text after hover longer (3-5 rows). Text after hover longer (3-5 rows). Text after hover longer (3-5 rows). Text after hover longer (3-5 rows)</p>
    </div>
</div>

JS fiddle : http://jsfiddle.net/xtfzgrcm/2/