List any GTM tag.
Use the shell script to download and examine any GTM tag.
Edit tag ID-s and the subdomain link in the sample sandbox HTML page.
Use the customized sandbox HTML page
- to load tags
- to watch loaded containers
- to watch tracking cookies
- to analyze cross-domain tracking
See Analyze existing tag configurations
See the reference
<!-- Google Tag Manager -->
<script>
(function (w, d, s, l, i) {
w[l] = w[l] || [];
w[l].push({
'gtm.start': new Date().getTime(),
'event': 'gtm.js'
});
var f = d.getElementsByTagName(s)[0],
j = d.createElement(s),
dl = l !== 'dataLayer' ? '&l=' + l : '';
j.async = true;
j.src = 'https://www.googletagmanager.com/gtm.js?id=' + i + dl;
f.parentNode.insertBefore(j, f);
}(window, document, 'script', 'dataLayer', 'GTM-XXXXXXX'));
</script>
<!-- End Google Tag Manager -->