This version is written with the most pure code, it uses Proxy with set and deleteProperty handlers. All the CSS has been rewrite to fit with the same quality of the JS code.
./build.sh dev build the development version
./build.sh prod build the production version
Only the production version works offline.
The entire production version weighs 5KB, and 25% of this is the favicon.
I didn't recode my own framework and the code is still perfectly maintenable.