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When developing, please:

  • Comply with Standard JS. This is checked with superlinter when you create pull requests and commit to natural.
  • Comply with ts-standard. This is tested when you create pull requests and commit to natural.
  • Prevent code duplication. Use jscpd to test this. This is tested when you commit to natural.
  • Write unit tests for jasmine. Make sure your unit tests pass.
  • For compatibility with browsers, do not use the file system fs. If you need to read files, use JSON and require.
  • Write documentation and commit this to the gh-pages branch.

The current configuration of the unit tests requires the following environment variable to be set:

    export NODE_PATH=.

CD/CD pipeline

The repository uses Github Actions for testing and publishing.

Currently, there three workflows:

  • Node CI: tests natural on the four most recent releases of Nodejs. Code coverage is analysed with Istanbul. Results are forwarded to Coveralls. In the README a badge shows the coverage.
  • Nodejs package: The natural package is automatically published to NPM when a release is created (tagged).
  • Lint Code Base: the repository is linted using the Github super linter which includes jslint and jscpd.

Github workflows can be found at ./.github/workflows.


We apply semantic versioning. Given natural’s version number MAJOR.MINOR.PATCH, increment the:

  • MAJOR version when you make incompatible API changes,
  • MINOR version when you add functionality in a backwards compatible manner, and
  • PATCH version when you make backwards compatible bug fixes.

Using the library in a browser

The package can be used in the browser using Webpack. It is tested using Webpack, Gulp and Jasmine. The test suite is run using the command: npm run test_browser. The server is at http://localhost:8888. You should uncheck “run tests in random order” in the browser to make it work. There are some tests that are sensitive to the order in which tests are run.