Note that style scoping comes with Shadow DOM, so once browsers support that (it's happening now), you can get scoping with no libraries. Polymer also adds a C

Note that style scoping comes with Shadow DOM, so once browsers support that (it's happening now), you can get scoping with no libraries. Polymer also adds a CSS custom properties polyfill and a CSS mixins (@apply) polyfill. Custom properties are implemented in FF and Chrome already, @apply is being worked on in Chrome. Polymer always tries to be forward compatible with actual web standards, one of it's main benefits :) Eventually Polymer will mostly be just templating and convenience helpers on top of native standards.