Skip to content



You can find our open issues in the project's issue tracker. Please let us know if you find any issues or have any feature requests there.


If you want to contribute to the project, your help is very welcome. Just fork the project, make your changes and send us a pull request. You can find the detailed description of how to do this in Github's guide to contributing to projects.

Our Roadmap page is a comprehensive list of tasks we want to do in the future. It is a good place to start if you want to contribute to Vizzu. In case you have something else in mind, that's awesome and we are very interested in hearing about it.


Development environment

For contributing to the project, it is recommended to use Node.js 18. However, for the documentation we are also using Python. If you plan to contribute to this part of the project, you will need Python, preferably version 3.10.

The following steps demonstrate how to set up the development environment on an Ubuntu 22.04 operating system. However, the process can be adapted for other operating systems as well.

To start using the Vizzu-Story development environment, you need to install the development dependencies.

npm install

If you want to work with the documantation too, you need to set up the Python development environment.

python3.10 -m venv ".venv"
source .venv/bin/activate
pip install pdm==2.8.0
pdm install

The development requirements are installed based on the package-lock.json and pdm.lock files. To update the development requirements, you can use the command npm run lock.

Note: For all available npm scripts, run npm run --list.

For better development practices, you can set up pre-commit and pre-push hooks in your local Git repository. The pre-commit hook will format the code automatically, and the pre-push hook will run the CI steps before pushing your changes.

npx husky install

Note: The provided pre-commit and pre-push hook configuration file is tailored for Ubuntu 22.04. If you intend to use another operating system, you may need to create a custom configuration file suitable for that environment.


The CI pipeline includes code formatting checks, code analysis, typing validation, and unit tests for the Vizzu-Story project.

To run the entire CI pipeline, execute the following npm script:

npm run ci

However, if you want to run the CI steps on specific parts of the project, you can use the following scripts: ci:src, ci:docs, or ci:tools.


You can check the code's formatting using the format script:

npm run format

If you need to fix any formatting issues, you can use the fix-format script:

npm run fix-format

If you wish to format specific parts of the project, you can use the following scripts: format:src, format:docs, format:tools, or fix-format:src, fix-format:docs, fix-format:tools.

Code analyses

To perform code analyses, you can use the lint script:

npm run lint

If you need to run code analyses for specific parts of the project, you can utilize the following scripts: lint:src, lint:docs, or lint:tools.


For type checking, you can use the type script:

npm run type

If you want to check specific parts of the project, you can use the following scripts: type:src or type:tools.


The project is tested using the jest testing framework. To run the tests, you can use the test script:

npm test


To build the documentation, you can use the build-docs script:

npm run build-docs

You can read the online version at


Vizzu-Story is distributed on npm. Note: You need to be an administrator to release the project.

To release Vizzu-Story, follow the steps below:

  • You should increase the version number in package.json. The version bump should be in a separated commit.
  • Generate the release notes and publish the new release on Releases.

Note: Publishing a new release will automatically trigger the release workflow which builds and uploads the Vizzu-Story package to npm.

Before making a release, you can build and check the package using the build script:

npm run build