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Tracking Exposed toolkit

This monorepo will eventually include all packages needed and platforms supported by Tracking Exposed:


unit test execution:

yarn test spec --coverage
  1. It executes all the test files you can find with find platforms/ -name '*.spec.ts
  2. Check the output in coverage/lcov-report/index.html

To run end to end test:

yarn pm2 start platforms/ecosystem.config.js --env test
yarn test e2e
yarn pm2 stop all

To start the services in production:

yarn pm2 start platforms/ecosystem.config.js
yarn pm2 status

(also for extension reviewer) how to build the extensions:

  • tiktok: yarn; yarn tk:ext dist; ls platforms/tktrex/extension/dist/*.zip
  • youtube: yarn; yarn yt:ext dist; ls platforms/yttrex/extension/dist/*.zip
  • youchoose: yarn; yarn ycai dist; ls platforms/ycai/studio/build/extension/*.zip

To assist debug

you might run yarn tsc-diagnostics and check out the content of diagnostics/ directory.

Supported Platforms


The browser extension of the tiktok algorithm analysis toolkit for researcher, power user, and algorithm analysts.


The browser extension of the youtube algorithm analysis toolkit for researcher, power user, and algorithm analysts.

Initially sponsored by ALEX from University of Amsterdam DATACTIVE reseaerch group. Maintained by the Technical team of Tracking Exposed, more details on


A complete Pupetteer wrapper to orchestrate reproducible data collection with YTTrEx extension, documented with the name of Guardoni

Maintained by the Technical and Research team of Tracking Exposed, more details on


The browser extension for YouChoose.AI and studio dashboard

Sponsored by the European Commission Ledger project in 2021, Develope by the technical team of YouChoose AI a project by Tracking Exposed. It is listed separately as we consider YouChoose should develop its own governance, reach out to us if you want to know more.

Note on supported platforms

As you can see in Tracking Exposed website a few other platforms are supported, work in progress, or discontinued. For example: Pornhub, Facebook, Amazon. They are not imported in this repository, but making this repository a shared resource and a monorepo is part of the refactor begun in 2021.



A portable data table written in React to display TRex data by pre-configured API.


Affero-GPL 3, as file attached in this repository display.