Google Experiments Bundler

Common errors

• Failed to bundle Google Experiments. This is expected as Google Optimize and Content Experiments are defunct.

  cause The package attempts to download experiment scripts from `www.google-analytics.com/cx/api.js`. This URL no longer serves the required content, often resulting in a network error (e.g., 404 Not Found) when the bundler tries to fetch it.
  fix This package is obsolete. The Google Analytics A/B testing methods it supports have been discontinued. Use a modern A/B testing platform integrated with GA4 instead.

• ReferenceError: require is not defined

  cause The package is published as CommonJS (using `require`), but the user is attempting to import it in an ECMAScript Module (ESM) environment (e.g., a modern Node.js project with `"type": "module"` in `package.json` or a browser-side script that implicitly treats `.js` as ESM).
  fix If you absolutely must use this package (which is not recommended due to its deprecation and defunct functionality), ensure your environment supports CommonJS `require()` statements. For Node.js, this means not setting `"type": "module"` in `package.package.json` or explicitly loading it with `createRequire` if in an ESM context.

Warnings

• breaking The core functionality of this package, which relies on Google Analytics Content Experiments and subsequently Google Optimize, is completely defunct. Google Optimize was sunset on September 30, 2023, and Content Experiments were deprecated earlier. This package can no longer fetch the necessary `cx/api.js` files and will not function as intended.
  Fix: Do not use this package. Migrate to a modern third-party A/B testing platform that integrates with Google Analytics 4 for experimentation, as Google no longer provides a native A/B testing solution.
• gotcha This package downloads JavaScript files from `www.google-analytics.com/cx/api.js` at runtime. Relying on external, unversioned, and now defunct scripts for critical application logic is a significant security risk and a point of failure.
  Fix: Avoid packages that fetch external code from non-CDN sources without proper validation or versioning. Modern experimentation platforms offer more secure and robust solutions.

Install

• npm install ga-experiments-bundler npm
• yarn add ga-experiments-bundler yarn
• pnpm add ga-experiments-bundler pnpm

Imports

• bundler
  wrong:

  import bundler from 'ga-experiments-bundler';

  correct:

  const bundler = require('ga-experiments-bundler');

  This package is CommonJS-only based on its usage in the README. Attempting ESM `import` will likely result in a runtime error like 'require is not defined in ESM module scope'.
• bundle
  wrong:

  import { bundle } from 'ga-experiments-bundler';

  correct:

  const bundler = require('ga-experiments-bundler');
  bundler.bundle(['id1', 'id2']);

  The `bundle` function is accessed as a method on the default CommonJS export `bundler` (e.g., `bundler.bundle`). Direct named import `bundle` is incorrect as per the `require` example.

Quickstart

Demonstrates how to use the `ga-experiments-bundler` API to attempt to bundle a list of Google Experiment IDs. This code will likely fail due to the deprecation of the underlying Google service.

const bundler = require('ga-experiments-bundler');
const fs = require('fs');

const experimentIds = [
    'nY2RGW2IQcWuvbYca51vhg',
    'ZWQgYW5kIHRyYW5zZmVyca',
    'UlNRSBjb250ZW50IHRyeHR'
];

bundler.bundle(experimentIds)
    .then(function(js){
        console.log('Successfully attempted to bundle experiments. Writing to cxapi.js...');
        fs.writeFileSync('cxapi.js', js);
        console.log('Bundle written. Note: The functionality of this bundle is defunct.');
    })
    .catch(function(error) {
        console.error('Failed to bundle Google Experiments. This is expected as Google Optimize and Content Experiments are defunct.', error.message);
    });