YARN WORKSPACES VS NPM WORKSPACES HOW TO
YARN WORKSPACES VS NPM WORKSPACES INSTALL
YARN WORKSPACES VS NPM WORKSPACES CODE

If you aren’t already using Yarn, install it globally. There’s other files and directories that you’ll need up to set up the cache.

YARN WORKSPACES VS NPM WORKSPACES CODE

If you’re already using Yarn, you have a yarn.lock file already checked into your code base’s git repository. You can do this by running: yarn plugin import workspace-tools This will be useful when running workspace scripts that you’ll use later. You should add this to your package.json: 'workspaces': [Īdditionally, add the workspaces-tools plugin. In the root package.json, set up the subdirectories under the workspaces key. How can we manage them? How do we optimize caching? This is where Yarn workspaces comes in. Each of the subdirectory’s package.json will have their own dependencies. This is a popular pattern for setting up a separation of concerns with a custom API client, a build or testing tool, or something else that may not have a place in the application logic.

Your JavaScript server has source code, but there’s an additional front end application that will be built and made available to users separately. For example, you may have the following set up: /app

A monorepo refers to a project, in this case, a JavaScript project, that has more than one section of the code base.

Workspacesįirst off, what are workspaces? Workspaces is Yarn’s solution to a monorepo structure for a JavaScript app or Node.js project. If you don’t have one, use the Heroku Getting Started with Node.js Project. To follow these guides, set up an existing Node project that makes use of a package.json too. Prerequisites for this include a development environment with Node installed. We will cover taking advantage of Yarn 2’s cache to manage monorepo dependencies. We’ll go over a popular use case for Yarn that is enhanced by Yarn 2: using workspaces to manage dependencies for your monorepo. Now, Yarn 2 is now officially supported by Heroku, and Heroku developers are able to take advantage of leveraging zero-installs during their Node.js builds. Yarn is a package manager that also provides developers a project management toolset. This includes the Yarn project’s release of Yarn 2 with a compressed cache of JavaScript dependencies, including a Yarn binary to reference, that can be used for a zero-install deployment. module.In true JavaScript fashion, there was no shortage of releases in the JavaScript ecosystem this year. This setup generates a code-coverage report and uses ts-jest which allows us to use TypeScript. To get our tests to run, we need to create a Jest configuration file located at the root of our project ( ). The package.json needs to modified to NPM where to find the packages will be located. npm install -save-dev typescript jest ts-jest packages will be located in the packages directory. We'll be using jest as the test framework. Next we can install some dependencies that we'll use to compile and test our packages. The first thing we need to do is create a directory for our project and initiate a private NPM package. Step 1: Setting up the top-level NPM project In a couple of steps I'll walk through setting up a multi-package mon0-repo for a TypeScript project that uses Jest for testing.

YARN WORKSPACES VS NPM WORKSPACES HOW TO

After figuring out how to do it, I thought I'd share this for those who are looking to do the same. It wasn't immediately clear how to set this up. While I was setting up a project, I tried to search for a way to combine workspaces with scoped packages. Since version 7 NPM follows suit by adding support for workspaces, opening up the world of multi-package tooling for NPM-only users. Lerna and Yarn workspaces provide tools to ease the lives of multi-package mono-repo maintainers.

Yarn workspaces vs npm workspaces