gulp-babel-istanbul

A gulp plugin that instruments source files with Istanbul code coverage after Babel transpilation, enabling ES2015+ coverage reporting. Version 1.6.0 (latest) uses babel-istanbul under the hood. It integrates with any Node.js test framework via gulp, providing hooks for require and reports. Compared to alternatives like gulp-istanbul, it natively handles Babel-transpiled code. Browser testing is untested. Requires gulp, babel, and Istanbul. Slow release cadence; last update 2016. Consider seamless builds with webpack or karma for browser coverage.