glTF – Runtime 3D Asset Delivery

Pattern matching syntax for ECMAScript

CSS for clean and fast web apps

ECMAScript Proposal, specs, and reference implementation for Realms

WebCodecs is a flexible web API for encoding and decoding audio and video.

Specs and explainers maintained by the editing task force

The Lurker's Guide to Babylon 5

Media Capabilities API

AV Artifact Atlas (AVAA) is a community-built resource for identifying errors and anomalies in video files.