@jsdevtools/coverage-istanbul-loader
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This is a Webpack loader that uses Istanbul to add code coverage instrumentation to your code. This is especially useful for in-browser testing, in a tool like Karma, where you can use karma-coverage-istanbul-reporter to output code coverage data in a variety of formats that are supported by services like Coveralls or Codacy.
Coverage Istanbul Loader is based on Istanbul Instrumenter Loader, but uses a newer version of the Istanbul API and has better support for source maps.
See the examples folder for usage examples for various use cases.
"hello, world" example
This is the most simplistic example. It just uses coverage-istanbul-loader with its default options to produce an output bundle that contains code coverage instrumentation.
TypeScript example
This example demonstrates using coverage-istanbul-loader with transpiled code. It correctly maps the instrumented JavaScript code back to the original TypeScript source code.
Karma example
This example demonstrates using coverage-istanbul-loader with Karma and karma-coverage-istanbul-reporter to produce code coverage reports for browser tests.
Example with options
This example demonstrates passing options to coverage-istanbul-loader. The options are passed-on to istanbul-lib-instrument, so all the same options are supported.
Contributions, enhancements, and bug-fixes are welcome! Open an issue on GitHub and submit a pull request.
To build/test the project locally on your computer:
Clone this repo
git clone https://github.com/JS-DevTools/coverage-istanbul-loader.git
Install dependencies
npm install
Build the code
npm run build
Run the tests
npm test
coverage-istanbul-loader is 100% free and open-source, under the MIT license. Use it however you want.
This package is Treeware. If you use it in production, then we ask that you buy the world a tree to thank us for our work. By contributing to the Treeware forest you’ll be creating employment for local families and restoring wildlife habitats.
Thanks to these awesome companies for their support of Open Source developers ❤
FAQs
A Webpack loader that uses Istanbul to add code coverage instrumentation
The npm package @jsdevtools/coverage-istanbul-loader receives a total of 347,815 weekly downloads. As such, @jsdevtools/coverage-istanbul-loader popularity was classified as popular.
We found that @jsdevtools/coverage-istanbul-loader demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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