Polyfill for construct stylesheets
We can use some css-in-js solution, but we're trying to keep dependencies at an absolute minimum
Progressively enhance the CSSStyleSheet (the one we use) Code by Joni Korpi
Can also be use with the polyfill for constructable stylesheets by Caleb Williams, but we're progressively enhancing it instead.
Then there's this crazy trick using a service worker by Jason Miller to basically roll your own CSS Modules.
SystemJS is implementing some