Slides from MeasureCamp BRU 2023-12-02.

1. Custom Tag Manager Templates
Demo: Build Robust & Helpful Tags & Variables
Markus Baersch

2. Why Templates?
Sandbox API vs. JS / HTML
● Limited JS
● Sandboxed = Secure(?)
● Transparency
● Updates
● “CSP safe”
● Gallery!!!
● It is not that hard!

3. Rocket Science?! My “most successful” Custom Variable GTM Template

4. Community Tags
More typical vendors available
● Amplitude
● Awin
● Criteo
● Hubspot
● Klaviyo
● Mailchimp
● Matomo
● Outbrain
● Snapchat
● Snowplow
● Taboola
● TikTok
● Piwik PRO
● …

5. Demo
DataLayer Event Repeater

6. Race Conditions:
CM vs. GTM
Tag Template: repeat
certain events when fired
Tasks:
1. get dataLayer copy
2. Find events to repeat
3. Push to dataLayer again

7. Full Tag Template:
https://github.com/mbaersch/
datalayer-event-repeater/

8. Full Tag Template:
41 lines of unformatted code

9. Prototype:
Only a few lines!

10. Prototype: Permissions

11. Prototype: Debugging (sort of)

12. Prototype: Adding tag
No settings required

13. Prototype: test in console

14. Prototype: results console / Tag Assistant

15. Done ;)

16. Build!
“Missing Manual”
(focus on ssGTM)
markus-baersch.de/gtmbook

17. Thank you! :)
Questions?
or feedback?
markus-baersch.de/bsky