HC || Form Submission tracking for GTM
https://gist.github.com/dan-donica/346f7d606dbee9525d9c72b0f5ba9b72
<!-- Begin "Form Submission tracking for GTM" || Help center -->
<!-- Insert in Settings->Javascript->Footer -->
<!-- IN:20200924-10-0 -->
<script type="text/javascript">
window.instapageFormSubmitSuccess = function (form) {
window.dataLayer = window.dataLayer || [];
window.dataLayer.push({
'event': 'formSubmissionSuccess',
'formId': 'contactForm'
});
};
</script>
<!-- End "Form Submission tracking for GTM" || Help center -->