Скачать или смотреть How to Create a Custom Trigger in Google Tag Manager When a Cookie is Created

Discover how to effectively create custom triggers in Google Tag Manager that activate upon cookie creation. This guide breaks down the essential steps for achieving your tracking goals!
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This video is based on the question https://stackoverflow.com/q/62413201/ asked by the user 'Alex Kessinger' ( https://stackoverflow.com/u/13342939/ ) and on the answer https://stackoverflow.com/a/62414095/ provided by the user 'Eike Pierstorff' ( https://stackoverflow.com/u/761212/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Create a Custom Trigger in Google Tag Manager When a Cookie is Created: A Complete Guide

Google Tag Manager (GTM) is a powerful tool for tracking user interactions on your website. A common scenario that many webmasters face is needing to trigger tags based on the creation of cookies. In this post, we'll explore the question of whether you can create a custom trigger to fire when a cookie is created and provide a detailed, step-by-step solution.

Understanding the Problem

You may find yourself in a situation where you're updating a website, leading to broken tags that require a quick fix. A practical approach in many cases involves setting a cookie in the browser and configuring a tag to fire once that cookie exists.

The Key Question

Can you create a custom trigger in Google Tag Manager that fires when a cookie is created, or do you need to consider an alternative workaround?

The Solution: Custom Event Triggers

While GTM does not offer a direct way for triggers to fire exclusively based on cookie creation, there is a workable solution involving custom events. Let’s break down the steps you need to implement this effectively.

Step 1: Understand Event Triggers

In GTM, triggers operate based on events. An event is characterized by a dataLayer push that introduces an object with the key "event" into the dataLayer array.

Types of Events in GTM:

Built-in Events: Such as page load, DOM ready, and other user interaction events (click, submit).

Custom Events: These are user-defined events where you specify an arbitrary value for the "event" key.

Step 2: Creating a Custom Event Trigger

To achieve a cookie-based trigger, follow these steps:

Create a Custom Event Trigger:

In your GTM workspace, create a new trigger of type Custom Event.

Use Regex for Broad Matching:

Tick the "Use regex" checkbox and enter .* (which matches any value). This means it will listen for any event.

Define the Firing Condition:

Use a condition for the trigger that states “update ready cookie does not equal undefined”. This way, the trigger will activate whenever the cookie you've set (named update ready cookie) is created and is defined.

Step 3: Implementing the Cookie Variable

Next, you need to create a first-party cookie variable in GTM that reads the update ready cookie. Here’s how:

Create a Variable:

Go to Variables New Variable Configuration 1st Party Cookie.

Name Your Variable:

Input the name of the cookie you are tracking, which in this case is update ready cookie.

Step 4: Linking Triggers to Tags

Now that you have your trigger and variable set up:

Link your newly created custom event trigger to the respective tags you want to fire once the cookie is detected.

Alternative Solution

If you are using JavaScript to set the cookie, consider pushing a custom event directly to the dataLayer instead. This allows you to bypass the cookie entirely and directly trigger the tags based on the JavaScript event. This method is also efficient and keeps your implementation tidy.

Conclusion

In summary, while GTM does not provide a simple switch to fire a trigger directly upon cookie creation, using a slight workaround with custom event triggers can achieve your goals effectively. Follow the steps outlined above to implement a reliable solution that fits your tracking strategy.

Now you're equipped to manage cookie-based triggers in GTM like a pro! If you have any questions or need further assistance, feel free to reach out.