Contributing to React Router

Thanks for contributing, you rock!

When it comes to open source, there are many different kinds of contributions that can be made, all of which are valuable. Here are a few guidelines that should help you as you prepare your contribution.

Setup

Before you can contribute to the codebase, you will need to fork the repo. This will look a bit different depending on what type of contribution you are making:

All new features, bug-fixes, or anything that touches react-router code should be branched off of and merged into the dev branch
Changes that only touch documentation can be branched off of and merged into the main branch

The following steps will get you set up to contribute changes to this repo:

Fork the repo (click the Fork button at the top right of this page)
Clone your fork locally

# in a terminal, cd to parent directory where you want your clone to be, then
git clone https://github.com/<your_github_username>/react-router.git
cd react-router

# if you are making *any* code changes, make sure to checkout the dev branch
git checkout dev

Install dependencies and build. React Router uses yarn (version 1), so you should too. If you install using npm, unnecessary package-lock.json files will be generated.

Think You Found a Bug?

Please conform to the issue template and provide a clear path to reproduction with a code example. Best is a pull request with a failing test. Next best is a link to CodeSandbox or repository that illustrates the bug.

Proposing New or Changed API?

Please provide thoughtful comments and some sample code that show what you'd like to do with React Router in your app. It helps the conversation if you can show us how you're limited by the current API first before jumping to a conclusion about what needs to be changed and/or added.

We have learned by experience that small APIs are usually better, so we may be a little reluctant to add something new unless there's an obvious limitation with the current API. That being said, we are always anxious to hear about cases that we just haven't considered before, so please don't be shy! :)

Issue Not Getting Attention?

If you need a bug fixed and nobody is fixing it, your best bet is to provide a fix for it and make a pull request. Open source code belongs to all of us, and it's all of our responsibility to push it forward.

Making a Pull Request?

Pull requests need only the approval of two or more collaborators to be merged; when the PR author is a collaborator, that counts as one.

When creating the PR in GitHub, make sure that you set the base to the correct branch. If you are submitting a PR that touches any code, this should be the dev branch. You set the base in GitHub when authoring the PR with the dropdown below the "Compare changes" heading:

Tests

All commits that fix bugs or add features need a test.

<blink>Do not merge code without tests!</blink>

Docs + Examples

All commits that change or add to the API must be done in a pull request that also updates all relevant examples and docs.

Development

Packages

React Router uses a monorepo to host code for multiple packages. These packages live in the packages directory.

We use Yarn workspaces to manage installation of dependencies and running various scripts. To get everything installed, make sure you have Yarn (version 1) installed, and then run yarn or yarn install from the repo root.

Building

Calling yarn build from the root directory will run the build, which should take only a few seconds. It's important to build all the packages together because react-router-dom and react-router-native both use react-router as a dependency.

Testing

Before running the tests, you need to run a build. After you build, running yarn test from the root directory will run every package's tests. If you want to run tests for a specific package, use yarn test --projects packages/<package-name>:

# Test all packages
yarn test

# Test only react-router-dom
yarn test --projects packages/react-router-dom

Repository Branching

This repo maintains separate branches for different purposes. They will look something like this:

- main   > the most recent release and current docs
- dev    > code under active development between stable releases
- v5     > the most recent code for a specific major release

There may be other branches for various features and experimentation, but all of the magic happens from these branches.

New Releases

When it's time to cut a new release, we follow a process based on our branching strategy depending on the type of release.

`react-router@next` Releases

We create experimental releases from the current state of the dev branch. They can be installed by using the @next tag:

yarn add react-router-dom@next
# or
npm install react-router-dom@next

These releases will be automated as PRs are merged into the dev branch.

Latest Major Releases

# Start from the dev branch.
git checkout dev

# Merge the main branch into dev to ensure that any hotfixes and
# docs updates are available in the release.
git merge main

# Create a new release branch from dev.
git checkout -b release/v6.1.0

# Create a new tag and update version references throughout the
# codebase.
yarn run version minor # | "patch" | "major"

# Push the release branch along with the new release tag.
git push origin release/v6.1.0 --follow-tags

# Wait for GitHub actions to run all tests. If the tests pass, the
# release is ready to go! Merge the release branch into main and dev.
git checkout main
git merge release/v6.1.0
git checkout dev
git merge release/v6.1.0

# The release branch can now be deleted.
git branch -D release/v6.1.0
git push origin --delete release/v6.1.0

# Now go to GitHub and create the release from the new tag. Let
# GitHub Actions take care of the rest!

Hot-fix Releases

Sometimes we have a crucial bug that needs to be patched right away. If the bug affects the latest release, we can create a new version directly from main (or the relevant major release branch where the bug exists):

# From the main branch, make sure to run the build and all tests
# before creating a new release.
yarn && yarn build && yarn test

# Assuming the tests pass, create the release tag and update
# version references throughout the codebase.
yarn run version patch

# Push changes along with the new release tag.
git push origin main --follow-tags

# In GitHub, create the release from the new tag and it will be
# published via GitHub actions

# When the hot-fix is done, merge the changes into dev and clean
# up conflicts as needed.
git checkout dev
git merge main
git push origin dev