What is First Defined Variable?
Loop through items and if item does not equal undefined, "" or null then use it and ignore the rest.
First Defined Variable variable is created by christoph88. Once you set up server side tagging with MetricsGate, you can use this variable with Google Tag Manager to enhance your data analytics.
This variable template is part of an open-source community, with its source code accessible on Github, and its documentation can also be found online.
You can check its version history below:
- Initial release.