Common Minimum API
The minimal collection of Web Platform APIs that ought to be implemented by Web-interoperable runtimes.
WinterCG
Web-interoperable Runtimes Community Group
The WinterCG is currently working on various efforts to improve web platform APIs across runtimes:
Web Crypto Streams
A proposal to define streaming support in the Web Crypto API.
Performance
The performance workstream is concerned with cross environment performance measurement.
Runtime Keys
A proposal defining standard identifier keys for various runtime environments.
Fetch
A fork of the WHATWG Fetch to make the upstream specification more suitable for server-side JavaScript environments.
Sockets API
A proposal incubating an API for establishing TCP connections in non-browser JavaScript environments.