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Contributing

If you're reading this, you're awesome! Thank you for helping us make this project great and being a part of the Material-UI community. Here are a few guidelines that will help you along the way.

Submitting a pull request

Material-UI is a community project, so pull requests are always welcome, but, before working on a large change, it is best to open an issue first to discuss it with the maintainers.

When in doubt, keep your pull requests small. To give a PR the best chance of getting accepted, don't bundle more than one feature or bug fix per pull request. It's always best to create two smaller PRs than one big one.

As with issues, please begin the title with [ComponentName].

When adding new features or modifying existing, please attempt to include tests to confirm the new behaviour. You can read more about our test setup in our test README.

When migrating a component to master, or submitting a new component, please add it to the lab.

Branch Structure

All stable releases are tagged (view tags). At any given time, master represents the latest development version of the library. Patches or hotfix releases are prepared on an independent branch.

master is unsafe

We will do our best to keep master in good shape, with tests passing at all times. However, in order to move fast, we will make API changes that your application might not be compatible with.

How to increase the chance of being accepted?

We will only accept a pull request for which all tests pass. Make sure the following is true:

  • The branch is not behind master.
  • If a feature is being added:
    • If the result was already achievable with the core library, explain why this feature needs to be added to the core.
    • It includes relevant tests.
    • If this is a common use case, considered adding an example to the documentation.
  • If a bug is being fixed, test cases that fail without the fix are included.
  • The code is formatted (run yarn prettier).
  • The code is linted (run yarn lint).
  • If API documentation is being changed in the source, yarn docs:api was run.
  • If prop types were changed, the TypeScript declarations were updated.
  • If TypeScript declarations were changed, yarn typescript passed.
  • The PR title follows the pattern [Component] Imperative commit message. (See: How to Write a Git Commit Message for a great explanation)

Getting started

Please create a new branch from an up to date master on your fork. (Note, urgent hotfixes should be branched off the latest stable release rather than master)

  1. Fork the Material-UI repository on Github
  2. Clone your fork to your local machine git clone git@github.com:<yourname>/material-ui.git
  3. Create a branch git checkout -b my-topic-branch
  4. Make your changes, lint, then push to to GitHub with git push --set-upstream origin my-topic-branch.
  5. Visit GitHub and make your pull request.

If you have an existing local repository, please update it before you start, to minimise the chance of merge conflicts.

git remote add upstream git@github.com:mui-org/material-ui.git
git checkout master
git pull upstream master
git checkout -b my-topic-branch
yarn

Testing the documentation site

The documentation site is built with Material-UI and contains examples of all the components. To get started:

yarn
yarn docs:dev

You can now access the documentation site locally.

Test coverage is limited at present, but where possible, please add tests for any changes you make. Tests can be run with yarn test.

Updating the component API documentation

To update the component API documentation (auto generated from component PropTypes comments), run:

yarn docs:api

Building locally

To use the provided build scripts with yarn you have to install yarn@^1.9.0. Depending on the package you want to build just run yarn workspace @material-ui/PACKAGE build.

Coding style

Please follow the coding style of the project. Material-UI uses eslint, so if possible, enable linting in your editor to get real-time feedback. The linting rules can be run manually with the following command yarn lint.

You can also run yarn prettier to reformat the code.

Finally, when you submit a pull request, they are run again by Circle CI, but hopefully by then your code is already clean!

How do I add a new demo in the documentation?

Let's get started.

It's simple. You just need to create a new file and modify two files. For example, let say you want to add new demos for buttons component, then you have to go through the following steps:

1. Add a new React component file under the related directory.

In this case, I'm going to add the new file to the following directory:

docs/src/pages/demos/buttons/

And let's give it a name: SuperButtons.js.

2. Edit the page Markdown file.

The Markdown file is the source for the website documentation. So, whatever you wrote there will be reflected on the website. In this case, the file you need to edit is docs/src/pages/demos/buttons/buttons.md, and I'm going to add a description about SuperButtons.

+ ### Super buttons
+
+ Sometimes, you need a super button to make your app looks **superb**. Yea ...
+
+ {{"demo": "pages/demos/buttons/SuperButtons.js"}}

3. Edit the Next.js page.

The Next.js page is saved in the following file. There is a direct mapping between the filename in the repository and the pathname in the documentation.

pages/demos/buttons.js

Then, you will need to add the following code:

+ 'pages/demos/buttons/SuperButtons.js': {
+   js: require('docs/src/pages/demos/buttons/SuperButtons').default,
+   raw: preval`
+ module.exports = require('fs')
+  .readFileSync(require.resolve('docs/src/pages/demos/buttons/SuperButtons'), 'utf8')
+`,
+        },

4. You are done 🎉!

In case you missed something, we have a real example that can be used as a summary report.

How do I use my local distribution of material-ui in any project?

Sometimes it is good to test your changes in a real world scenario, in order to do that you can install your local distribution of Material-UI in any project with yarn link.

First, you have to build your local distribution of Material-UI:

# From the root folder of the material-ui project
cd packages/material-ui
yarn build

Then, you create a link to your local distribution:

cd build
yarn link

Next, you link your local distribution of Material-UI to any project you want to try your changes:

# From the root folder of any project
yarn link "@material-ui/core"

Now, every time you import material-ui in your project, it is going to use your local distribution.

Roadmap

To get a sense of where Material-UI is heading, or for ideas on where you could contribute, take a look at the ROADMAP.

License

By contributing your code to the mui-org/material-ui GitHub repository, you agree to license your contribution under the MIT license.