Emmet filter for BEM: If you’re writing your HTML and CSS code in OOCSS-style, Yandex’s BEM style specifically, you will like this filter. It provides some aliases and automatic insertions of common block and element names in classes.
Polymer Project: The Polymer library is designed to make it easier and faster for developers to create great, reusable components for the modern web.
Building web components using ES6 classes: Web components evolve markup into something that’s meaningful, maintainable, and highly modular. Thanks to these new API primitives, not only do we have improved ergonomics when building apps, but we gain better overall structure, design, and reusability.
What is shady DOM?: On browsers that support shadow DOM, it’s possible to have an element that is rendered with complex DOM, but have that complexity hidden away as implementation detail.
SMACSS: SMACSS (pronounced “smacks”) is a way to examine your design process and as a way to fit those rigid frameworks into a flexible thought process. It is an attempt to document a consistent approach to site development when using CSS.