Concept course
JavaScript for GTM
Just enough JavaScript to stop waiting on developers: variables and types, arrays and objects, the two places GTM runs your code, reshaping data for GA4, writing event listeners, and scraping the DOM safely.
Syllabus
- 1→
Why A Tagger Needs JavaScript
The point where the GTM UI runs out, and code begins.
- 2→
Values, Variables & Types
Strings, numbers, booleans, and why types bite you.
- 3→
Arrays, Objects & Loops
The data shapes GA4 ecommerce is built from.
- 4→
Where GTM Runs Your Code
Custom JS variables vs Custom HTML tags.
- 5→
Reshaping Data For GA4
Adapting a messy dataLayer to vendor requirements.
- 6→
Writing Event Listeners
Catching interactions GTM doesn't track by default.
- 7→
DOM Scraping, Safely
Reading values off the page without breaking it.
- 8→
Using AI, And Verifying It
Go faster with AI without shipping hallucinated code.