This repo is the demo/seed for bunding an Angular application with Google Closure Compiler. It contains a minimal Hello World application with a single component.

The compressed JS size for an Angular 5.0.1 Hello World app is 39.99kb.

-rw-r--r--  1 29055 Nov  9 18:42 dist/bundle.js.brotli
-rw-r--r--  1 32554 Nov  9 18:42 dist/bundle.js.gz
-rw-r--r--  1 11896 Nov  9 18:42 node_modules/zone.js/dist/zone.min.js.brotli
-rw-r--r--  1 12988 Nov  9 18:32 node_modules/zone.js/dist/zone.min.js.gz

See angular/angular#8550 for more context.

Try it

First, install brotli, which is a more modern compression algorithm than gzip. It gives a 13% smaller JS file, no work required! The commands below use it, but you don't have to.

On Mac, brew install brotli.

$ yarn install
$ yarn run build
$ yarn run serve

Where does the size come from?

$ yarn run explore

Notes

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

Requires Java installed to run the Closure Compiler. We recommend installing http://zulu.org/download-dev/.

How To Reproduce

Run the build as is

How To Fix

Rollup rxjs and rxjs/operators as FESM

$ npm run rollup:rxjs

Edit node_modules/rxjs/package.json and change the line that points to the es2015 bundle to now point to the FESM:

"es2015": "./_fesm2015/index.js"

Repeat for all rxjs modules. By default, only operators is needed by the typical @angular packages.

Edit node_modules/rxjs/operators/package.json.

"es2015": "../_fesm2015/operators/index.js"

Change paths in closure.conf to the new fesm

--js node_modules/rxjs/package.json
--js node_modules/rxjs/_fesm2015/index.js

--js node_modules/rxjs/operators/package.json
--js node_modules/rxjs/_fesm2015/operators/index.js