测试微信开放标签功能“ wx-open-launch-app” ，如果App没杀掉进程，微信是可以正常跳转到指定App的，如果App杀掉进程，就不能正常跳转

<wx-open-launch-app
    id="launch-btn"
    appid="xxx"
    extinfo="your-extinfo"
  >
  <script type="text/wxtag-template">
    <style>.btn { padding: 12px }</style>
    <button class="btn">App内查看<button>
  </script>
  </wx-open-launch-app>
  
  <script>
    var btn = document.getElementById('launch-btn');
    btn.addEventListener('launch', function (e) {
      alert("launch-success")
      console.log('success');
    });
    btn.addEventListener('error', function (e) {
      alert(JSON.stringify(e.detail))
      console.log('fail', e.detail);
    });
  </script>