Hi , i recently start using ionic2 and im testing it, im really new also with typescript and i don’t know how to use webpack …
after everyu build i see that ionic generate the file app.bundle.js but it contains comments, whitespaces of angular2 and it’s size is pointless… there is a way to compress it?
You need add uglifyjs to gulp task. Google it 
This should be part of the default process, at least for the production release.
Tried to add .pipe(uglify()) in the ionic-gulp-browserify-typescript script by it just hangs. Seems to need some Javascript fixing before…
I not tested with Ionic yet, but with pure javascript I use Obfuscator a lot to leave a dirty code.
@dugwood Check out the following post for a example how to achieve it using gulpfile.js. And it’s on the roadmap - here’s the issue on Github. I guess that it’ll soon become part of the build process for production releases.
Sorry, didn’t look for the issue on Github, I thought it was the only topic about it, my bad.
I’ve tried a similar approach to yours (changed directly the main module for testing purposes). But I have the same issue as in Ionic 2 - app.bundle.js - Minification
Anyway, I’ll wait for it to be fixed, thanks for the heads up 
@allpref: I’ve tried YUI compressor, which works great on all my javascript files, but it hanged on app.bundle.js too. That how I found this thread.
UPDATE: The minification is now part of the standard build process for TypeScript and JavaScript.
There’s an example in the linked post on how to enable it:
Besides updating to the latest version of ionic-gulp-tasks don’t forget to also update your gulpfile.js accordingly using the one in ionic2-app-base as template (TypeScript or JavaScript).