css下划线仅带有箭头居中的文字

Question

格式化问题...我无法使用jsfiddle链接执行它要求我执行的操作。

Answer 1

h2 {
  line-height: 17px;
  padding-bottom: 15px;
  text-transform: uppercase;
  border-bottom: 2px solid #00a7a8;
  position: relative;
  display: inline-block;
}

h2:before {
  content: '\25bc';
  position: absolute;
  top: 100%;
  left: 5em;
  color: #00a7a8;
}


/* You can get quite a bit of control by adjusting the line-height of the pseudo-element */

<h2>The Header Is Here</h2>

Answer 2

h2 {
line-height: 17px;
padding-bottom: 15px;
text-transform: uppercase;
border-bottom: 2px solid #00a7a8;
position: relative;
display:inline-block;
}
h2:before {
    content: '\25bc';
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left:-12px;
    color: #00a7a8;
}

<h2>The Header Is Here</h2>