Contributing to Angular Material
We would love for you to contribute to Angular Material and help make it ever better! As a contributor, here are the guidelines we would like you to follow:
- Code of Conduct
- Question or Problem?
- Issues and Bugs
- Feature Requests
- Submission Guidelines
- Coding Rules
- Commit Message Guidelines
- Signing the CLA
Help us keep Angular open and inclusive. Please read and follow our Code of Conduct.
Please do not open issues for general support questions as we want to keep GitHub issues for bug reports and feature requests. You've got much better chances of getting your question answered on StackOverflow where the questions should be tagged with tag
StackOverflow is a much better place to ask questions since:
- there are thousands of people willing to help on StackOverflow
- questions and answers stay available for public viewing so your question / answer might help someone else
- StackOverflow's voting system assures that the best answers are prominently visible.
To save your and our time, we will be systematically closing all the issues that are requests for general support and redirecting people to StackOverflow.
If you would like to chat about the question in real-time, you can reach out via our gitter channel.
If you find a bug in the source code or a mistake in the documentation, you can help us by submitting an issue to our GitHub Repository. Including an issue reproduction (via CodePen, JsBin, Plunkr, etc.) is the absolute best way to help the team quickly diagnose the problem. Screenshots are also helpful.
You can help the team even more and submit a Pull Request with a fix.
You can request a new feature by submitting an issue to our GitHub Repository. If you would like to implement a new feature, please submit an issue with a proposal for your work first, to be sure that we can use it. Please consider what kind of change it is:
- For a Major Feature, first open an issue and outline your proposal so that it can be discussed. This will also allow us to better coordinate our efforts, prevent duplication of work, and help you to craft the change so that it is successfully accepted into the project.
- Small Features can be crafted and directly submitted as a Pull Request.
Before you submit an issue, search the archive, maybe your question was already answered.
If your issue appears to be a bug, and hasn't been reported, open a new issue. Help us to maximize the effort we can spend fixing issues and adding new features by not reporting duplicate issues. Providing the following information will increase the chances of your issue being dealt with quickly:
- Overview of the Issue - if an error is being thrown a non-minified stack trace helps
- Angular and Material Versions - which versions of Angular and Material are affected (e.g. 2.0.0-alpha.53)
- Motivation for or Use Case - explain what are you trying to do and why the current behavior is a bug for you
- Browsers and Operating System - is this a problem with all browsers?
- Reproduce the Error - provide a live example (using CodePen, JsBin, Plunker, etc.) or a unambiguous set of steps
- Screenshots - Due to the visual nature of Angular Material, screenshots can help the team triage issues far more quickly than a text description.
- Related Issues - has a similar issue been reported before?
- Suggest a Fix - if you can't fix the bug yourself, perhaps you can point to what might be causing the problem (line of code or commit)
You can file new issues by providing the above information here.
Before you submit your Pull Request (PR) consider the following guidelines:
Search GitHub for an open or closed PR that relates to your submission. You don't want to duplicate effort.
Please sign our Contributor License Agreement (CLA) before sending PRs. We cannot accept code without this.
Make your changes in a new git branch:
git checkout -b my-fix-branch master
Create your patch, including appropriate test cases.
Follow our Coding Rules.
Test your changes with our supported browsers and screen readers.
Run the full Angular Material test suite, as described in the developer documentation, and ensure that all tests pass.
Commit your changes using a descriptive commit message that follows our commit message conventions. Adherence to these conventions is necessary because release notes are automatically generated from these messages.
git commit -a
Note: the optional commit
-acommand line option will automatically "add" and "rm" edited files.
Push your branch to GitHub:
git push my-fork my-fix-branch
In GitHub, send a pull request to
If we suggest changes then:
Make the required updates.
Re-run the Angular Material test suites to ensure tests are still passing.
Rebase your branch and force push to your GitHub repository (this will update your Pull Request):
git rebase master -i git push -f
That's it! Thank you for your contribution!
After your pull request is merged
After your pull request is merged, you can safely delete your branch and pull the changes from the main (upstream) repository:
Delete the remote branch on GitHub either through the GitHub web UI or your local shell as follows:
git push my-fork --delete my-fix-branch
Check out the master branch:
git checkout master -f
Delete the local branch:
git branch -D my-fix-branch
Update your master with the latest upstream version:
git pull --ff upstream master
To ensure consistency throughout the source code, keep these rules in mind as you are working:
- All features or bug fixes must be tested by one or more specs (unit-tests).
- All public API methods must be documented. (Details TBD).
We have very precise rules over how our git commit messages can be formatted. This leads to more readable messages that are easy to follow when looking through the project history. But also, we use the git commit messages to generate the Angular Material change log.
Commit Message Format
Each commit message consists of a header, a body and a footer. The header has a special format that includes a type, a scope and a subject:
<type>(<scope>): <subject> <BLANK LINE> <body> <BLANK LINE> <footer>
The header is mandatory and the scope of the header is optional.
Any line of the commit message cannot be longer 100 characters! This allows the message to be easier to read on GitHub as well as in various git tools.
If the commit reverts a previous commit, it should begin with
revert:, followed by the header of
the reverted commit. In the body it should say:
This reverts commit <hash>., where the hash is
the SHA of the commit being reverted.
Must be one of the following:
- feat: A new feature
- fix: A bug fix
- docs: Documentation only changes
- style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
- refactor: A code change that neither fixes a bug nor adds a feature
- perf: A code change that improves performance
- test: Adding missing tests or correcting existing tests
- build: Changes that affect the build system, CI configuration or external dependencies (example scopes: gulp, broccoli, npm)
- chore: Other changes that don't modify
The scope could be anything specifying place of the commit change. For example
The subject contains succinct description of the change:
- use the imperative, present tense: "change" not "changed" nor "changes"
- don't capitalize first letter
- no dot (.) at the end
Just as in the subject, use the imperative, present tense: "change" not "changed" nor "changes". The body should include the motivation for the change and contrast this with previous behavior.
The footer should contain any information about Breaking Changes and is also the place to reference GitHub issues that this commit Closes.
Breaking Changes should start with the word
BREAKING CHANGE: with a space or two newlines.
The rest of the commit message is then used for this.
A detailed explanation can be found in this document.
Please sign our Contributor License Agreement (CLA) before sending pull requests. For any code changes to be accepted, the CLA must be signed. It's a quick process, we promise!
- For individuals we have a simple click-through form.
- For corporations we'll need you to print, sign and one of scan+email, fax or mail the form.