License

AngularJS is an open source project licensed under the MIT license. Your contributions are always welcome. When working with AngularJS code base, please follow the guidelines provided on this page.

Contributing to Source Code

We'd love for you to contribute to our source code and to make AngularJS even better than it is today! Here are the guidelines we'd like you to follow:

Major changes that you intend to contribute to the project should be discussed first on our mailing list so that we can better coordinate our efforts, prevent duplication of work, and help you to craft the change so that it is successfully accepted upstream.
Small changes and bug fixes can be crafted and submitted to Github as a pull request.

Applying Code Standards

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.
All public API methods must be documented with ngdoc, an extended version of jsdoc (we added support for markdown and templating via @ngdoc tag). To see how we document our APIs, please check out the existing ngdocs.
With the exceptions listed below, we follow the rules contained in Google's JavaScript Style Guide:
- Do not use namespaces: Instead, we wrap the entire angular code base in an anonymous closure and export our API explicitly rather than implicitly.
- Wrap all code at 100 characters.
- Instead of complex inheritance hierarchies, we prefer simple objects. We use prototypical inheritance only when absolutely necessary.
- We love functions and closures and, whenever possible, prefer them over objects.
- To write concise code that can be better minified, internally we use aliases that map to the external API. See our existing code to see what we mean.
- We don't go crazy with type annotations for private internal APIs unless it's an internal API that is used throughout AngularJS. The best guidance is to do what makes the most sense.

Checking Out and Building Angular

The AngularJS source code is hosted at Github, which we also use to accept code contributions. The AngularJS repository can be found at https://github.com/angular/angular.js.

Several steps are needed to check out and build AngularJS:

Installation Dependencies

Before you can build AngularJS, you must install or configure the following dependencies on your machine:

Rake: We use Rake as our build system, which is pre-installed on most Macintosh and Linux machines. If that is not true in your case, you can grab it from the Rake website.
Git: The Github Guide to Installing Git is quite a good source for information on Git.
Node.js: We use Node to generate the documentation and to run a development web server. Depending on your system, you can install Node either from source or as a pre-packaged bundle.

Once installed, you'll also need several npms (node packages), which you can install once you checked out a local copy of the Angular repository (see below) with:
- cd angular.js
- npm install

Creating a Github Account and Forking Angular

To create a Github account, follow the instructions here. Afterwards, go ahead and fork the main angular repository.

Building AngularJS

To build AngularJS, you check out the source code and use Rake to generate the non-minified and minified AngularJS files:

To clone your Github repository, run:

git clone git@github.com:<github username>/angular.js.git

To go to the AngularJS directory, run:
```
cd angular.js
```
To add the main AngularJS repository as an upstream remote to your repository, run:
```
git remote add upstream https://github.com/angular/angular.js.git
```
To add node.js dependencies
```
npm install
```
To build AngularJS, run:
```
rake package
```

The build output can be located under the build directory. It consists of the following files and directories:

angular-<version>.zip — This is the complete zip file, which contains all of the release build artifacts.
angular.js — The non-minified angular script.
angular.min.js — The minified angular script.
angular-scenario.js — The angular End2End test runner.
docs/ — A directory that contains all of the files needed to run docs.angularjs.org.
docs/index.html — The main page for the documentation.
docs/docs-scenario.html — The End2End test runner for the documentation application.

Running a Local Development Web Server

To debug code and run end-to-end tests, it is often useful to have a local HTTP server. For this purpose, we have made available a local web server based on Node.js.

To start the web server, run:
```
rake webserver
```
To access the local server, go to this website:
```
http://localhost:8000/
```
By default, it serves the contents of the AngularJS project directory.

Running the Unit Test Suite

Our unit and integration tests are written with Jasmine and executed with Testacular. To run all of the tests once on Chrome run:

rake test:unit

To run the tests on other browsers (Chrome, ChromeCanary, Firefox, Opera and Safari are pre-configured) use:

rake test:unit[Opera+Firefox]

During development it's however more productive to continuously run unit tests every time the source or test files change. To execute tests in this mode run:

To start the Testacular server, capture Chrome browser and run unit tests, run:
```
rake autotest:jqlite
```
To capture more browsers, open this url in the desired browser (url might be different if you have multiple instance of Testacular running, read Testacular's console output for the correct url):
```
http://localhost:9876/
```
To re-run tests just change any source or test file.

To learn more about all of the preconfigured Rake tasks run:

rake -T

Running the end-to-end Test Suite

To run the E2E test suite:

Start the local web server if it's not running already.
```
rake webserver
```

In a browser, go to:

http://localhost:8000/build/docs/docs-scenario.html

or in terminal run:

rake test:e2e

Submitting Your Changes

To create and submit a change:

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.
Create a new branch off the master for your changes:
```
git branch my-fix-branch
```
Check out the branch:
```
git checkout my-fix-branch
```
Create your patch, make sure to have plenty of tests (that pass).
Commit your changes and create a descriptive commit message (the commit message is used to generate release notes, please check out our commit message conventions and our commit message presubmit hook validate-commit-msg.js):
```
git commit -a
```
Push your branch to Github:
```
git push origin my-fix-branch
```
In Github, send a pull request to angular:master.
When the patch is reviewed and merged, delete your branch and pull yours — and other — changes from the main (upstream) repository:
1. To delete the branch in Github, run:
```
git push origin :my-fix-branch
```
2. To check out the master branch, run:
```
git checkout master
```
3. To delete a local branch, run:
```
git branch -D my-fix-branch
```
4. To update your master with the latest upstream version, run:
```
git pull --ff upstream master
```

That's it! Thank you for your contribution!