sns-sdk.html

<!-- 判断微信浏览器，并引入微信的 SDK -->
<script>
if (/MicroMessenger/i.test(navigator.userAgent))
  document.write('<script src="//res.wx.qq.com/open/js/jweixin-1.0.0.js"><\/script>')
</script>
<!-- 引入依赖 UParams -->
<script src="//github.elemecdn.com/YanagiEiichi/uparams/1.3.0/uparams.min.js"></script>
<!-- 引入 sns-sdk -->
<script src="//github.elemecdn.com/eleme/sns-sdk/1.0.0-rc.1/sns-sdk.js"></script>

<!-- 使用 -->
<script>
  sns.authorize();  //唤起微信授权
</script>