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Kameleoon has deprecated kameleoon.js and replaced it with engine.js in all Kameleoon implementation snippets. Kameleoon will no longer support kameleoon.js after October 1, 2026. After this date, any campaigns on websites still referencing kameleoon.js will stop functioning. Update your implementation snippet accordingly.

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Setting up a worker in Cloudflare

Log in to your Cloudflare account and create a worker to point the original request back to your Kameleoon Web Experimentation snippet. You will need to configure the necessary Cloudflare route and script.

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Route

Add the following path: *<your_website_url_here>/kameleoonjs/script.js.

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Script

You need a script that listens for requests from the /enginejs/ route and replaces that route with the one that leads to your Kameleoon snippet. You can use the script below. Replace YOUR_SITECODE with your Kameleoon Project ID (follow the steps outlined in this article to retrieve it).
The domain for your Kameleoon scripts (https://[your-site-code].kameleoon.xx) may vary from one project to another. Your projects may use either kameleoon.eu or kameleoon.io, depending on their creation date. Ensure you use the domain displayed in your project in the Kameleoon app.

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Add the Kameleoon snippet in your source code

Refer to this article to understand how to implement Kameleoon on your website.
The final step is to replace the default Kameleoon application file URL in the installation tag with your Cloudflare URL (for example, <your_website_url_here>/kameleoonjs/script.js if you have chosen this route). For instance, if you are using the JavaScript File (Asynchronous Loading with Anti-Flicker) implementation method, the Kameleoon application file is by default hosted on //SITE_CODE.kameleoon.io/engine.js. You just need to change this URL in the installation tag, replacing it with your own URL.