Only load widget script after clicking button

https://support.zendesk.com/hc/en-us/articles/229167008?page=5#comment_360001007367

By Gab Guinto 

To have the widget script load only upon clicking the button, you just have to insert this to your html:

<script>
  function widget(d) {
      var script = d.createElement('script');
      script.type = 'text/javascript';
      script.id = 'ze-snippet';
      script.async = true;
      script.src = 'https://static.zdassets.com/ekr/snippet.js?key=<key>';
      d.getElementsByTagName('head')[0].appendChild(script);
  };
  </script>

Just replace <key> with your own widget key. We can't guarantee that it will work on your account, but we tested this and it worked on a test account.

Hope this helps.