Google Analytics session number now accessible via gtag.js get API update

The gtag.js get() API has been enhanced to support parsing the Google Analytics session number from the session cookie, expanding beyond the previous capability of only retrieving the session ID. This update aligns with Google Tag Manager's custom templates functionality.

gtag.js get() API Overview

The get command in gtag.js allows retrieval of various values, including those set with the set command, using the syntax:

gtag('get', '<target>', '<field_name>', callback)

• <target>: A string specifying the target to fetch values from (e.g., G-XXXXXXXXXX).
• <field_name>: The name of the field to retrieve.
• callback: A function invoked with the requested field value or undefined if the field is unset.

Supported Field Names

Field names can be custom fields set via gtag('set') or predefined fields:

This enhancement allows developers to access the session number directly, improving session tracking capabilities within Google Analytics 4 via gtag.js.