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Ladle Contributing Guide

Thanks for your interest to contribute to Ladle. Please take a moment and read through this guide:

Repository

Ladle is a monorepo using pnpm workspaces. The package manager used to install and link dependencies must be pnpm v9. It can be installed as:

npm install -g pnpm@9

Install the dependencies after forking and cloning the repository

pnpm install

Install playwright dependencies used in testing

pnpm exec playwright install

NOTE: this project has a VS Code Devcontainer configuration which enables development in a Docker container, as well as on GitHub Codespaces. This is a great option if you want to contribute to the project, but don't necessarily want to install this project's toolset and dependencies globally on your computer.

Developing

The main @ladle/react package can be found in packages/ladle. You can quickly test and debug your changes in @ladle/react by running packages/example (it's a toy project so feel free to add more stories there):

cd packages/example
pnpm ladle serve
pnpm ladle build

Tests

Before creating a PR you should make sure all tests are still passing:

# root
pnpm typecheck
pnpm lint

# root or individual packages
pnpm build
pnpm test

There are unit tests and end-to-end tests powered by Playwright in e2e/ folder. If you are adding a new feature, you will be almost always asked to add a new e2e test. You can add it to one of the existing suites / test applications or create new one.

NOTE When you want to debug by launching a browser in E2E testing, you can move to the e2e/{ANY_FOLDER} and use pnpm run test-dev --headed. You can also run a specific test only by using test.only.

-test("a11y addon works", async ({ page }) => {
+test.only("a11y addon works", async ({ page }) => {

Documentation

If applicable, your changes should be also documented on ladle.dev. The doc site can be started as:

cd packages/website
pnpm start

Changesets

Ladle uses changesets to manage the changelog and releases. If you are changing @ladle/react you need to add a changeset (or you will be prompted in your PR):

pnpm changeset

You will be asked to select the scope (pick @ladle/react) and version (patch, minor, major). Then you should describe it:

  • WHAT the change is
  • WHY the change was made
  • HOW a consumer should update their code (if applicable)

This will create an .changeset/*.md file that gets merged with your PR and attached to the release by admins later.

Creating a new package

You can create a new package in packages or e2e (playwright apps+tests). It needs to be added to:

  • package.json#workspaces
  • pnpm-workspace.yaml#packages