Client-Side Variables (Frontend)f

In JENTIS Tag Manager, values or properties that are accessed or received on the client side — that is, within the website or browser environment — are referred to as Client-Side Variables. In this context, the client side is the web application as it runs in a user's browser. JENTIS lets you access these properties through client-side variables. Each variable has one evaluated, static value per state. You can learn more about this concept in the following section.

The first step in working with frontend variables is to choose and create the variable type.

JENTIS offers several options for selecting the parameter type. You can use a structured form, where you only define the parameter name to read the value from. Or you can write your own JavaScript function to return a specific value.

Template	Use Case	Description
Get First Party Cookie	Will read a value from a defined cookie name.	Source is the document.cookie browser API.
Get GTM data layer value	Read a value from the data layer used in many Google Tag Manager implementations. Detailed Article: GTM Data Layer Variable Use Case.	The default source is the global window.dataLayer object, and the value is read from that array.
Get JTM data layer value	Read a value from the data layer used with JENTIS Tag Manager (_jts.push() event values). Detailed Article: JTM Data Layer Variable Use Case.	This uses the JENTIS Data Layer API. Following the general JENTIS Data Layer schema, a property is always read from a specific object, such as pageview, product, or order
Get JavaScript variable	Read a websites JS global scope value.	Either a property from window or document can be read.
Click Trigger Properties	Used only with SELECTORACTION Trigger Type - a click (or any other action) property.	Use this only in combination with an according trigger to return an interacted items value (ie. inner text of clicked element).
Get URL Parameter	URL query parameter information.	Returns a URLs query parameter value, ie. gclid will return the value of the current websites URL gclid=<value>.
Client-Side Lookup Table	Mapping table of an input variable to case-switch specific values based on condition logics.	Use a dynamic input to return based on conditions of the input value certain static values.
Client-Side Javascript Code	Write your own JS function to compute and return a value.	Use our library of available functions and APIS in scope of the client-side JS function variable: - Client Side Function Scope - Available Function Input Arguments

More types may be added in the future, so this list may change.

As each type has its own configuration, the next sections explain how to set up the most common ones during the creation process.