<wx-open-launch-weapp
  id="launch-btn"
  username="gh_xxxxxxxx"
  path="pages/home/index?user=123&action=abc"
>
  <script type="text/wxtag-template">
    <style>.btn { padding: 12px }</style>
    <button class="btn">打开小程序</button>
  </script>
</wx-open-launch-weapp>
按照官方文档按钮不显示，把script改成template能显示了，但是点击无反应