Use case: Ecosystem partner application and PetHub widget reside on the same page.
The following script would also need to be included after the iFrame code:
<script> var iframe = document.getElementById('pbph-widget') if(typeof(iframe) != 'undefined' && iframe != null) { var url = iframe.src var addQueryParam = url?key1="+{value1}" iframe.src= addQueryParam } </script>