Log

log Function

The this.log() function provides a way to output debug information from within server-side variables in JENTIS. Since console.log() is not supported in this environment, this.log() is your go-to method for debugging logic and inspecting values during execution.

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Purpose

Use this.log() to:

• Debug the behavior of your server-side variables

• Log the state of intermediate values or conditions

• Trace why a variable returns a specific result

• Monitor runtime outputs inside the JENTIS Preview/Debug Monitor

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Function Definition

Property	Description
Function Name	this.log
Type	function
Available In	Server-Side Variables
Returns	void (no return value)

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Parameters

Parameter	Description	Type	Required	Example
value	Any value (string, number, object, array)	any		"Debug message"

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Example Usage

async function() {
    const gclid = this.getFrontendVariable("gclid");
    this.log("Extracted GCLID: " + gclid); // Will show up in the debug monitor
    return gclid;
}

You can also log objects and arrays:

this.log({ status: "ok", data: [1, 2, 3] });

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Where to View Logs

Logs created via this.log() will appear:

• In the Preview Mode of the JENTIS Tag Manager

• Under the "Variables" tab for the executed tracking event

• Associated with the server-side variable that made the log call

This provides visibility into the variable’s internal logic, even if the value doesn't return as expected.

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Use Cases

• Debug conditional branches

• Log HTTP response payloads

• Check whether values from this.getFrontendVariable(), this.userStorage.read(), etc., are being resolved correctly

• Understand the flow of asynchronous logic

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Notes

• This is a debug-only tool — logs are visible only in preview/debug mode.

• Does not output to the browser console or persist in production logs.

• Avoid logging sensitive information (e.g., personal identifiers) even in debug mode.

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Summary

this.log() is the official way to debug and trace the behavior of your server-side variables in JENTIS. It helps you inspect values in real-time during preview mode, making troubleshooting and development faster, safer, and more transparent.