Scoper
A polyfill for scoped style elements. Just add scoper.js to your page.
How It Works
Each <style scoped> element's parent is wrapped with a span that is given a unique ID. Its rules are moved to head and all selectors prepended with their respective ID.
Scoper is only active when the page contains scoped styles and the browser doesn't support them.
Tests
Tests can be run with the command mocha test/test.js.