document_head.hbs

Code 3 - Zendesk Help Center integration

<script>
  function getScript(url, success) {
    var script = document.createElement('script');
    script.src = url;
    var head = document.getElementsByTagName('head')[0],
    done = false;
    // Attach handlers for all browsers
    script.onload = script.onreadystatechange = function() {
      if (!done && (!this.readyState || this.readyState == 'loaded' || this.readyState == 'complete')) {
        done = true;
        // callback function provided as param
        success();
        script.onload = script.onreadystatechange = null;
        head.removeChild(script);
      };
    };
    head.appendChild(script);
  };
</script>