使用date-*属性实现纯css的tooltip

HTML：

 <p data-tip="Hover Me!Hover Me!" style="margin-top:80px">Hover Me!</p>

 <p data-tip="图文消息" style="margin-top:80px">Hover Me!</p>

CSS：

  p {
    cursor: pointer;
    position: relative;
  }

  p:hover:before{
    content:"";
    position: absolute;
    left: 25px;
    top: -10px;
    border-bottom: 8px solid transparent;
    border-right: 8px solid transparent;
    border-left: 8px solid transparent;
    border-top: 8px solid #555556;
    display: inline-block;
    width: 0;
    height: 0;
  }

  p:hover:after {
    content:attr(data-tip) ;
    position:absolute;
    left:-10px;
    top:-38px;
    border-radius:3px;
    background-color: #555556;
    color: #fff;
    padding: 5px 5px;
    margin-left: 10px;
  }

效果如图：