The WebTransport Working Group has published WebTransport as a W3C Candidate Recommendation Snapshot. This document defines a set of ECMAScript APIs in WebIDL to allow data to be sent and received between a browser and server, utilizing [WEB-TRANSPORT-OVERVIEW]. This specification is being developed in conjunction with protocol specifications developed by the IETF WEBTRANS Working Group.
Comments are welcome via Github issues by 30 October 2026.