Karma's documentation should describes how to collect code coverage using the old version of Istanbul (https://github.com/gotwarlost/istanbul) which is deprecated two years ago and doesn't support new ECMAScript versions. Currently this is being done by using the "karma-coverage" package (https://www.npmjs.com/package/karma-coverage).
Expected behaviour
Karma's documentation should describe how to collect code coverage using the new version of IstanbulJS using the new "karma-coverage-istanbul-reporter" package (https://www.npmjs.com/package/karma-coverage-istanbul-reporter).
Actual behaviour
Karma's documentation should describes how to collect code coverage using the old version of Istanbul (https://github.com/gotwarlost/istanbul) which is deprecated two years ago and doesn't support new ECMAScript versions. Currently this is being done by using the "karma-coverage" package (https://www.npmjs.com/package/karma-coverage).
Steps to reproduce the behaviour
Checkout this link: https://karma-runner.github.io/3.0/config/preprocessors.html