Browserify has been used in…

 

Browserify has been used in the WordPress core build process, but recently the core team decided to move in the direction of using Webpack (and ES6 imports) as the new bundler of choice. I think this is a good move. Read this trac ticket for more details.

If you aren't familiar with Webpack there are a number of introductions on the web, including this this one from Kimberley Cook.