css - 我希望 .tabcontent 在 0.3 秒内从 0 中心显示为全尺寸动画

Question

Sample of hover effect

我希望悬停效果在 0.3 秒内从 0 中心开始到全尺寸动画。效果是我想要的，但动画不起作用。我要构建的页面将包含八个不同的图像(两列，每列四张)我希望这种悬停效果在您悬停每个图像时起作用。

#tabbox{
	height: 300px;
	position: relative;
	//border: 2px solid #888;
}

#tabbox img{
	cursor: pointer;
	display: block;
	width: 240px;
	height: 240px;
}

.tab {
	float: left;
}

.tabcontent{
	position: absolute;
	padding:10px;
	top:0;
	width: 0px;
	height: 0px;
	background:rgba(0, 0, 0, .5);
	border:1px solid #fff;
	margin:10px;
	color:#fff;
	display:none;
	overflow:hidden;
	-webkit-transition: height 0.3s ease-in-out;
	-moz-transition: height 0.3s ease-in-out;
	-o-transition: height 0.3s ease-in-out;
	transition: height 0.3s ease-in-out;
}

.tabcontent:before{
	content: "";
	position: absolute;
	z-index: -1;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	-webkit-transform: scale(0);
	transform: scale(0);
	-webkit-transition-property: transform;
	transition-property: transform;
	-webkit-transition-duration: 0.3s;
	transition-duration: 0.3s;
	-webkit-transition-timing-function: ease-out;
	transition-timing-function: ease-out;
}

.tab:hover > .tabcontent{
	display: block;
	width: 200px;
	height: 200px;
}

.tab:hover:before, .tab:active:before{
	-webkit-transform: scale(1);
	transform: scale(1);
}

<div id="tabbox">
	<div class="tab">
		<img src="http://zone1.gingermartinco.netdna-cdn.com/wp-content/uploads/2012/04/Napa-Real-Estate-Realtor.jpg" />
		<div class="tabcontent">
			<p>Text box to describe the images around when you hover over them, this description will change depending on what image you hover over.</p>
		</div><!--tabcontent-->
	</div><!--tab-->
</div><!--tabbox-->

Answer 1

只需从 .tabcontent 中删除 display: none;，因为此属性无法设置动画，只能设置数字属性。

fiddle :

https://jsfiddle.net/uxouomoy/