The most basic example I can think of a Typescript project with Webpack + Karma + full coverage

I tried many routes to make this work properly. Some people have enough with a coverage report from the js file generated by webpack but I wanted a better user experience and invested some time finding a good solution.

In the proposed solution, karma-typescript can be also used instead of going through the webpack route but in more complex scenarios reusing the main webpack configuration may be very convenient.

• istanbul-instrumenter-loader to generate istanbul instrumentation data for coverage
• karma-coverage-istanbul-reporter to report coverage from istanbul
• karma-webpack to preprocess files through Webpack