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Contributing

Development

System Requirements

node 16+, npm 8+ are recommended.

Compilation Target(s)

We target es2022, and publish both ES-modules and CommonJS modules.

Installation and Dependencies

Install dependencies with npm ci. npm install will update the package-lock.json with the most recent compatible versions.

We value having as few runtime dependencies as possible. The addition of any dependencies requires careful consideration and review.

Modules

This repository uses NPM workspaces to establish a simple monorepo. Within the root project, there is one common project (packages/shared) which features common interfaces and code, consumed by the published modules (packages/server and packages/client). The shared module is built and published separately, and is a peer dependency of the SDK packages. Consumers need not install it separately, since npm and yarn automatically install required peers. In order to prevent regressions cause by incompatibilities due to version mismatches, the SDKs are locked to a particular version of the @openfeature/core module, and the CI enforces that it's released before any dependant SDKs (see the related workflow).

Testing

Run tests with npm test.

End-to-End Tests

The continuous integration runs a set of gherkin e2e tests using in-memory provider. These tests run with the "e2e" npm script. If you'd like to run them locally, follow the steps below:

npm run e2e-server

for the server e2e tests and

npm run e2e-client

for the client e2e tests.

Packaging

Both ES modules and CommonJS modules are supported, so consumers can use both require and import functions to utilize this module. This is accomplished by building 2 variations of the output, under dist/esm and dist/cjs, respectively. To force resolution of the dist/esm/**.js* files as modules, a package json with only the context {"type": "module"} is included at a in a postbuild step. Type declarations are included at /dist/types/

Pull Request

All contributions to the OpenFeature project are welcome via GitHub pull requests.

To create a new PR, you will need to first fork the GitHub repository and clone upstream.

git clone https://github.com/open-feature/js-sdk.git openfeature-js-sdk

Navigate to the repository folder

cd openfeature-js-sdk

Add your fork as an origin

git remote add fork https://github.com/YOUR_GITHUB_USERNAME/js-sdk.git

Makes sure your development environment is all setup by building and testing

npm install
npm test

To start working on a new feature or bugfix, create a new branch and start working on it.

git checkout -b feat/NAME_OF_FEATURE
# Make your changes
git add --all
git commit --signoff
git push fork feat/NAME_OF_FEATURE

Open a pull request against the main js-sdk repository.

How to Receive Comments

  • If the PR is not ready for review, please mark it as draft.
  • Make sure all required CI checks are clear.
  • Submit small, focused PRs addressing a single concern/issue.
  • Make sure the PR title reflects the contribution.
  • Write a summary that helps understand the change.
  • Include usage examples in the summary, where applicable.

How to Get PRs Merged

A PR is considered to be ready to merge when:

  • Major feedback is resolved.
  • Urgent fix can take exception as long as it has been actively communicated.

Any Maintainer can merge the PR once it is ready to merge. Note, that some PRs may not be merged immediately if the repo is in the process of a release and the maintainers decided to defer the PR to the next release train.

If a PR has been stuck (e.g. there are lots of debates and people couldn't agree on each other), the owner should try to get people aligned by:

  • Consolidating the perspectives and putting a summary in the PR. It is recommended to add a link into the PR description, which points to a comment with a summary in the PR conversation.
  • Tagging domain experts (by looking at the change history) in the PR asking for suggestion.
  • Reaching out to more people on the CNCF OpenFeature Slack channel.
  • Stepping back to see if it makes sense to narrow down the scope of the PR or split it up.
  • If none of the above worked and the PR has been stuck for more than 2 weeks, the owner should bring it to the OpenFeatures meeting.

Design Choices

As with other OpenFeature SDKs, js-sdk follows the openfeature-specification.