Check the User Agent of the user that triggers a Google Tag Manager event

问题

I have a datalayer event push in JS and was wondering if it is also possible to learn the User-Agent of the users triggering the event.

回答1:

You need to create variable which will return user agent

1) Go to Variables -> New

2) Name: User Agent

3) Type: Custom JavaScript

4) Code:

function () {return  navigator.userAgent;}

Then you can use this variable in your tags like that {{User Agent}}

回答2:

Even more simply, can't you use a "JavaScript Variable" (instead of a "Custom JavaScript" and then just set navigator.userAgent?

回答3:

Google analytics custom dimension field can be maximum 150 characters and user agent data (when encoded) usually exceed the limit. You need to find a way to shorten the user agent information within a custom js script before sending to GA. You may crop the first 150 character of the user agent information or remove the unnecessary sections or remove the blank characters.

来源：https://stackoverflow.com/questions/45844098/check-the-user-agent-of-the-user-that-triggers-a-google-tag-manager-event