javascript - 元素悬停在 css3 淡入淡出效果中无法正常工作

Question

我正在做一个简单的元素，其中单个 block 元素悬停将显示 4 倍缩放元素。我是通过纯 css 和 css3 转换完成的。请参阅 jsfiddle 演示。将有四个元素，每个元素都有不同的悬停元素。但是当我将鼠标悬停在它上面时，尽管它与该 block 或元素没有关联，但只显示一个悬停元素。

查看演示以发表自己的意见。

.main {
  position: relative;
  width: 300px;
  overflow: hidden
}

.main a {
  width: 50%;
  height: 50%;
  float: left;
}

.main a .child {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  background: gray;
  filter: alpha(opacity=0);
  opacity: 0;
  -webkit-transition: opacity 0.5s ease-out;
  -moz-transition: opacity 0.5s ease-out;
  -ms-transition: opacity 0.5s ease-out;
  -o-transition: opacity 0.5s ease-out;
  transition: opacity 0.5s ease-out;
}

.main a:hover .child {
  -webkit-transition: opacity 0.2s ease-in;
  -moz-transition: opacity 0.2s ease-in;
  -ms-transition: opacity 0.2s ease-in;
  -o-transition: opacity 0.2s ease-in;
  transition: opacity 0.2s ease-in;
  zoom: 1;
  filter: alpha(opacity=100);
  opacity: 1.0;
}

<div class="main">
  <a href="">
    <img src="http://placehold.it/150x150">
    <div class="child">
      <h4>1.Text</h4>
    </div>
  </a>
  <a href="">
    <img src="http://placehold.it/150x150">
    <div class="child">
      <h4>2.Text</h4>
    </div>
  </a>
  <a href="">
    <img src="http://placehold.it/150x150">
    <div class="child">
      <h4>3.Text</h4>
    </div>
  </a>
  <a href="">
    <img src="http://placehold.it/150x150">
    <div class="child">
      <h4>4.Text</h4>
    </div>
  </a>

</div>

Demo project on JSFiddle

重要说明:如果我使用不显示或在悬停状态下阻止 css3 过渡，那么它工作正常，但我需要淡入淡出效果。

Answer 1

这里的问题是当悬停在元素上时显示四个 .child 元素，但只有最后一个 .child 是可见的，要解决此问题，请使用 visibility 属性而不是 display:

https://jsfiddle.net/f9m1mnce/

.main{
	position: relative;
	width: 300px;
	overflow:hidden	
}
.main a{
	width: 50%;
	height: 50%; 
	float:left;
}
.main a > .child{
	position: absolute; 
	left:0;
	right:0;
	bottom:0;
	top: 0;
    visibility: hidden;
	background: gray;
	filter: alpha(opacity=0);
	opacity: 0;
	-webkit-transition: opacity 0.5s ease-out;
	-moz-transition: opacity 0.5s ease-out;
	-ms-transition: opacity 0.5s ease-out;
	-o-transition: opacity 0.5s ease-out;
	transition: opacity 0.5s ease-out;					
}
.main a:hover > .child{
	-webkit-transition: opacity 0.2s ease-in .2;
	-moz-transition: opacity 0.2s ease-in .2 ;
	-ms-transition: opacity 0.2s ease-in .2;
	-o-transition: opacity 0.2s ease-in .2;
	transition: opacity 0.2s ease-in .2; 
    top: 0;
    visibility: visible;
	zoom: 1;
	filter: alpha(opacity=100);
	opacity: 1.0;
}

<div class="main">
	<a href="">
		<img src="http://placehold.it/150x150">
		<div class="child">
			<h4>1 Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
		</div>
	</a>
	<a href="">
		<img src="http://placehold.it/150x150">
		<div class="child">
			<h4>2 Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
		</div>
	</a>
	<a href="">
		<img src="http://placehold.it/150x150">
		<div class="child">
			<h4>3 Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
		</div>
	</a>
	<a href="">
		<img src="http://placehold.it/150x150">
		<div class="child">
			<h4>4 Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
		</div>
	</a>
	
</div>