<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>进行中...</title>
<style>
dot {
display:inline-block;
width:3ch;
text-indent:-1ch;
vertical-align:bottom;
overflow:hidden;
animation:dot 3s infinite step-start both;
}
@keyframes dot {
33% { text-indent: 0; }
66% { text-indent: -2ch; }
}
</style>
</head>
<body>
<a href="javascript:">进行中<dot>...</dot></a>
</body>
</html>