Features

Support for WebTransport

The Engine.IO client can now use WebTransport as the underlying transport.

WebTransport is a web API that uses the HTTP/3 protocol as a bidirectional transport. It's intended for two-way communications between a web client and an HTTP/3 server.

References:

• https://w3c.github.io/webtransport/
• https://developer.mozilla.org/en-US/docs/Web/API/WebTransport
• https://developer.chrome.com/articles/webtransport/

For Node.js clients: until WebTransport support lands in Node.js, you can use the @fails-components/webtransport package:

import { WebTransport } from "@fails-components/webtransport";
global.WebTransport = WebTransport;

Added in 7195c0f.

Cookie management for the Node.js client

When setting the withCredentials option to true, the Node.js client will now include the cookies in the HTTP requests, making it easier to use it with cookie-based sticky sessions.

import { Socket } from "engine.io-client";
const socket = new Socket("https://example.com", {
  withCredentials: true
});

Added in 5fc88a6.

Links

• Diff: 6.4.0...6.5.0
• Server release: 6.5.0
• ws version: ~8.11.0 (no change)