Feature.js is a fast, simple and lightweight browser feature detection library in 1kb.

Former home of import maps (now merged into HTML)

Methods for working with iterators in ECMAScript

ECMAScript proposal for Optional Chaining (aka Existential Operator, aka Null Propagation)

Universal CSS styleguide generator for grunt. Easily integrate Styledocco or KSS styleguide generation into your development workflow.

A repository for the Display Locking spec

A simple Safari extension to enable keyword search from the address bar