使下划线CSS转换方向改变

Question

我正在使用我在this website找到的某种样式来创建有效的下划线幻灯片。例如，请参阅jsfiddle 如您所见，下划线从左到右。我将如何在文本顶部创建另一行，从右到左过渡？我可以简单地调整当前的代码片段，还是必须完全使用其他方法？

＆＃13;

＆＃13;

.cmn-t-underline {
  position: relative;
  color: #ff3296;
}
.cmn-t-underline:after {
  display: block;
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 0;
  height: 10px;
  background-color: #2E9AFE;
  content: "";
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  -o-transition: all 0.3s;
  transition: all 0.3s;
  height:2px;
}
.cmn-t-underline:hover {
  color: #98004a;
}
.cmn-t-underline:hover:after {
  width: 100%;
	height:2px;
}

＆＃13;

<h1 class="cmn-t-underline">Test</h1>

＆＃13;

＆＃13;

＆＃13;

Answer 1

试试这个，它可以随心所欲地工作

.cmn-t-underline {
  position: relative;
  color: #ff3296;
}
.cmn-t-underline:after {
  display: block;
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 0;
  height: 10px;
  background-color: #2E9AFE;
  content: "";
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  -o-transition: all 0.3s;
  transition: all 0.3s;
  height:2px;
}
.cmn-t-underline:hover {
  color: #98004a;
}
.cmn-t-underline:hover:after {
  width: 100%;
	height:2px;
}

.cmn-t-underline:hover:before {
  width: 100%;
	height:2px;
}

.cmn-t-underline:before {
  display: block;
  position: absolute;
  right: 0;
  top: 0px;
  width: 0;
  height: 10px;
  background-color: #2E9AFE;
  content: "";
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  -o-transition: all 0.3s;
  transition: all 0.3s;
  height:2px;
}

<h1 class="cmn-t-underline">Test</h1>

Answer 2

http://jsfiddle.net/juhL2256/1/

从左到右更改。

.cmn-t-underline:after {
  display: block;
  position: absolute;
  right: 0;
  bottom: -10px;
  width: 0;
  height: 10px;
  background-color: #2E9AFE;
  content: "";
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  -o-transition: all 0.3s;
  transition: all 0.3s;
  height:2px;
}