Description

WebTransport is an API for accesing HTTP/3 protocol in browser, similar to WebSockets but with very nice UDP features like unreliable and out-of-order (but very much faster) delivery.

Rationale

It is very useful in web games, because it allows for a very fast (but unreliable) messaging.

It is enabled in desktop Chrome, Edge, and Opera, and mobile Samsung Internet and Android Browser.

Specification

https://w3c.github.io/webtransport/

Tests

https://wpt.fyi/results/?label=master&label=experimental&aligned&view=subtest&q=webtransport