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Fork this repository, clone your fork and add this repository as the upstream remote (see below).

You will need to have corepack enabled so that you can use pnpm.

git clone <<FORKED_REPO_URL>>
cd remirror
git remote add upstream
corepack enable
pnpm --version
pnpm install

# Checkout a branch and start working on it
git checkout -b <<SOME_BRANCH_NAME>>

If you already have a previous version of the repository checked out then make sure to clean your node_modules by running the following command before installation.

pnpm clean:all
pnpm install

# An alternative which combines these to commands
pnpm refresh


When importing code from another package in the monorepo, ensure that it is referenced in the package.json file in the package you're modifying. This is normally as a dependency (expect in the case of @remirror/pm which in most cases is a peer dependency)


pnpm run watch

When developing Remirror, you need to open a terminal window and run the command above. This command will keep watching the source code from all packages and compile them when there are changes. Error messages will be printed in the terminal if the compilation didn't succeed.

Set the environment variable DEBUG to true to see more detailed logs.

# for Linux and macOS
export DEBUG=true
pnpm run watch

Under the hood, for most packages, this command uses esbuild to compile TypeScript to JavaScript, and tsc to output type definitions.

Some packages have their own build scripts, e.g. @remirror/theme uses babel and linaria to produce CSS files. pnpm run watch will execute the build scripts in these packages too.

If you only want to build all packages once, run the following command:

pnpm run build

If you only want to build some specific packages, run the following command:

pnpm remirror-cli build @remirror/extension-bold @remirror/extension-italic


pnpm run storybook

When run this builds all packages and then watches for changes to reload as necessary. If you are running storybook, then it will run pnpm run watch automatically, so you don't need to do it yourself.

Project Structure

  • .github - The GitHub specific configuration for workflows, issue templates and pull request templates.
  • docs - The documentation for this project. This is also used by the docusaurus website.
  • packages - The packages provided by remirror. Within this folder there are top level packages like remirror and jest-remirror and also scope packages within the @remirror/* folder like @remirror/core.
  • support - This is the package that provides the configuration files, the website, and many other folders. Each directory includes a readme file that explains it's functionality. Take a look.


From the root directory use the following command to launch the documentation site.

pnpm docs:dev

Once the build completes (can take a minute the first time) navigate to http://localhost:3000 (or another port if that one is already being used).

The documentation is written using docusaurus and all files and dependencies are available in the /website subdirectory. To add a new dependency, you will need to add it to /website/package.json and not the top level package.json file. You can either do this by manually editing the /website/package.json file or you use the following command.

cd website
pnpm add <package>

Adding Documentation

The following command will help create a markdown file with the documentation already scaffold.

pnpm generate:docs

This will present you with a list of potential documentation targets.

At the time of writing you will be able to select from:

  • packages
  • extensions
  • commands

Some Tips

When writing new documentation consider these three questions.

  • What is this?
    • A concise introduction.
  • Why does it exist?
    • The problem that is solved.
    • The features it enables (with examples).
  • How can / do I use it?
    • Installation
    • Examples
    • Detailed walk through guide


Unit tests can be run with the following commands.

# Unit
pnpm test
pnpm test:watch

# E2E
pnpm e2e
pnpm e2e:watch

Always create all your tests inside of the __tests__/ sub-folder within the package that is being tested. So for @remirror/react-core all tests would be placed inside packages/remirror__react-core/__tests__/.

Always create your e2e tests inside of a __e2e__/ subfolder within the package or example that is being tested. So for testing stories you would add the new tests to examples/react-storybook/__e2e__.

Sometimes you will want to narrow down tests to run only a specific file or folder.

pnpm test dom.spec.ts # Runs the test file matching dom.spec.ts once.
pnpm test:watch @remirror/react # Runs every test in the `@remirror/react` package under watch mode.

Once in watch mode you can also press p and type out the file you want to focus on. Press enter to select the file.

For naming conventions, use the following.

  • Unit tests: *.spec.ts(x)
  • Integration tests: *.e2e.test.ts within the __e2e__/ folder

Unit tests can be run limited to a specific package or test file name, e.g. for extension-bold:

pnpm test extension-bold

This also supports watching the tests for the specific file.

pnpm test:watch extension-bold


Stories are an integral part of this repository. They serve as the package level documentation and are used as the building blocks for the e2e tests. Stories are primarily user experience focused.

For example the bold extension will have a story which shows how the commands can be used to toggle bold text within the editor.

Each story should be placed within the stories folder and the file should end with the pattern *.stories.ts(x).

Following the 1.0.0 release of remirror there will be a big push to add more stories documenting the usage of all the extensions, commands and hooks available.

Using Git

I recommend that while working on your code you commit early and often. You won't be judged. All worked submitted in a pull request (see following section) will be squashed into one commit before merging (unless it makes sense to keep the commits as separate items).

Pull Request (PR) Process

Once your work is complete you'll want to create a Pull Request to share all that goodness with the rest of us.

  1. Create a pull request using the github interface. The template will automatically populate the description for you; use a PR name following the "Conventional Commits" conventions.
  2. Add a description and reference the issue this pull request addresses where applicable. The description will be used as the body of the git commit message since all pull request are squashed down into one commit before merging.
  3. Tick off all relevant check boxes by placing an x between the square brackets i.e. [ ] to [x].
  4. Please add a screenshot where the change is related to the user interface or design. It makes it so much easier to grasp the intentions of your work. You can use your favourite GIF screenshare tool for creating animated screenshots.
  5. Once submitted the PR will be addressed at our earliest convenience.

Code style

Over time this project has accumulated quite an active set of lint rules.

The following are some personal preferences for coding style.

  • Functions with more than two arguments should condense these arguments into a parameter object.
  • Comment everything. Even if the comment is just to say, I have no idea what I'm doing, there is a lot of information in that comment.
  • Choose simplicity over performance. Performance is abstract and it's often better to start with a simple implementation that can be made more performant, than something that's complex from day one.
  • Use const Arrow Functions when declaring components.
import React from 'react';

const MyComponent = () => {
return <div />;
  • Use Function Declarations when creating top level functions.
// ✅ - GOOD
function doSomething(something: string) {
return `Cannot do ${something}`;

// ❌ - BAD
const doSomething = (something: string) => {
return `Cannot do ${something}`;

Creating packages


The easiest way to create a new scoped package in this repo is to run pnpm run create:package NAME --description "DESCRIPTION". For example the following command would create a package called @remirror/extension-chill.

pnpm run create:package @remirror/extension-chill --description "The time to be chill."


If you prefer not to use the automated method for creating extension the following also works.

  1. Copy support/templates/extension-template to packages/remirror__extension-<name>.
  2. Rename template, Template and TEMPLATE in the new package to <name>, <Name> and <NAME>.
  3. Replace TEMPLATE_DESCRIPTION with a suitable description.
  4. Rename the files from template- to <name>-.

Edit remirror package.

If you think this package is important and most users would want it, you can add it into the remirror package so that users won't need to install it separately.

  1. Edit packages/remirror/package.json to add dependency and entrypoint.
  2. Edit packages/remirror/src/extensions.ts. to export your extension.

Final steps

  1. (OPTIONAL) Add your name and email as a contributor to the package.json.
  2. Run pnpm i in root.

Code of Conduct

Our Pledge

In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.

Our Standards

Examples of behavior that contributes to creating a positive environment include:

  • Using welcoming and inclusive language
  • Being respectful of differing viewpoints and experiences
  • Gracefully accepting constructive criticism
  • Focusing on what is best for the community
  • Showing empathy towards other community members

Examples of unacceptable behavior by participants include:

  • The use of sexualized language or imagery and unwelcome sexual attention or advances
  • Trolling, insulting/derogatory comments, and personal or political attacks
  • Public or private harassment
  • Publishing others' private information, such as a physical or electronic address, without explicit permission
  • Other conduct which could reasonably be considered inappropriate in a professional setting

Our Responsibilities

Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.

Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.


This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.


Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.

Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.


This Code of Conduct is adapted from the Contributor Covenant, version 1.4, available at