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Just is a library that organizes build tasks for your JS projects. It consists of

  • a build task build definition library
  • sane preset build flows for node and browser projects featuring TypeScript, Webpack and jest
  • project scaffold tool that generates no-ejection needed repos that tracks template changes


All the documentation is online at


This README contains only the instructions on how to build and contribute to the project. This is a monorepo that uses the lerna monorepo management utility. To get started, simply run the following:


and build all the packages this way:

yarn build

Development is usually done one package at a time. So go into each package and develop with the innerloop npm script:

cd packages/just-task
yarn dev

Tests are run with the test npm script:

cd packages/just-task
yarn test


Package Description
create-just Invoked by npm init just, a tool that scaffolds project repos
just-task The task definition library that wraps undertaker and yargs libraries
just-scripts A reusable preset of frequently used tasks in node and browser projects
just-stack-* A set of templates to be used by the scaffold tool create-just
just-scripts-utils A set of utilities that are shared between just-scripts and create-just
just-task-logger A shared pretty logger used to display timestamps along with a message
documentation The Docusaurus site content and styles which generates the Github page for this library


This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit Please refer Contribution guide for more details

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact with any additional questions or comments.