This repo is a proof-of-concept for bunding an Angular application with Google Closure Compiler. It contains a minimal Hello World application with a single component.

This example app builds a single .js file for an Angular 2 application. No other scripts are needed (eg. zone.js)

The current size is:

-rw-r--r--   1 alexeagle  eng  130472 Dec 16 10:05 bundle.js
-rw-------   1 alexeagle  eng   34955 Dec 16 10:05 bundle.js.brotli
-rw-r--r--   1 alexeagle  eng   40244 Dec 16 10:05 bundle.js.gz

At NgConf'16 we announced a 21.6k bundle, but this did not include zone.js. The angular2-polyfills.min.js file from that era was 28k, so the total JS payload for an Angular app was about 50k. So as of December 2016 we have a 32% reduction in total payload.

See angular/angular#8550 for more context.

Try it

$ npm install
$ npm run build
$ python -m SimpleHTTPServer

Where does the size come from?

$ npm run explore

Notes

This requires an ES6 distro of Angular. I have published my own personal snapshot, which is built from this branch: https://github.com/alexeagle/angular/tree/closure

See package.json for how this is used in the demo.

Requires Node 6.x since the ngc tool (and its deps) are now shipped as ES6 as well.

Requires building rxjs from https://github.com/alexeagle/rxjs/tree/closure2 using npm run compile_dist_es6_for_closure. Copy this into the vendor directory.

TODO

• Get an official Angular distro with ES6, don't use my branch.
• Need rxjs to produce a closure-compatible ES6 distro, don't use my branch.
• Remove the hack of needing node_modules/rxjs for nodejs and vendor/rxjs for browser
• Extend the demo to use a 3rd party component, like @angular/material