Add Google Tag Manager container and dataLayer

tips & tricks
1

Hi everyone,
just for developer and analyst 's hugers! Meanwhile I developed my blog (migration from wordpress), I had a tips about implementation of container (script) of Google Tag Manager.

So, here my guide how I implemented it.

file config.toml or similar
I added new params

[params]

Enable container by entering your Google Tag Manager container ID

google_tag_manager = “GTM-XXXXXX” // change XXX’s with your containerID

After in your theme > layouts > partials find your header.html

add before tag those lines:

{{ if $.Site.Params.google_tag_manager }}
  <!-- Google Tag Manager -->
  <!-- create dataLayer -->
  <script>
   <!-- OPTIONAL dataLayer -->
    var dataLayer = window.dataLayer = window.dataLayer || [];
    dataLayer.push({
      page:'{{ .Title }}',
      categories:'only examples about your dataLayer'
    });
  </script>
  <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','{{ $.Site.Params.google_tag_manager }}');</script>
  <!-- End Google Tag Manager -->
  {{ end }}

and after tag, first line:

  {{ if $.Site.Params.google_tag_manager }}
    <!-- Google Tag Manager (noscript) -->
    <noscript><iframe src="https://www.googletagmanager.com/ns.html?id={{ $.Site.Params.google_tag_manager }}"
    height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
    <!-- End Google Tag Manager (noscript) -->
  {{ end }}

It’s all and works fine your Google Tag Manager.

So, if you can add first dataLayer as my code, you can add new values.

2

You may want to wrap your google analytics code with

{{ if not .Site.IsServer }}
...
{{ end }}

So that your analytics results aren’t polluted when running hugo server locally.

3

Good point!
Yes, I had this rule above, instead old Google Analytics script, and I forgot to extend {{end}} at the final of Google Tag Manager script.

Thank you @zwbetz

4

Hi! In case others are reading this topic. I’m a digital analyst working on a Hugo blog. I’ve created a GTM integration for Hugo with Google Tag Manager. I wrote a blog to help you get started if you want to use it: How to add Google Tag Manager to Hugo.

The idea is to integrate the Hugo variables in the datalayer and also inject the container code into the website.

I hope it’s useful!