display: block;
text-align: center;
}
a:link,a:visited,a:hover,a:active{
color:#fff;
text-decoration: none;
}
.no{
-webkit-tap-highlight-color:rgba(0,0,0,0);
}
.hasRed{
-webkit-tap-highlight-color:rgba(255,0,0,1);
}
</style>
</head>
<body>
<p>默认<br><a href="javascript:void(0)">a标签</a></p>
<p>无色块<br><a href="javascript:void(0)" class="no">a标签</a></p>
<p>点击之后有红色块<br><a href="javascript:void(0)" class="hasRed">a标签</a></p>
</body>
</html>
