Socket.IO 4.3.0

Hello everyone!

We have just published a new minor version of Socket.IO: 4.3.0

An ESM bundle is now provided:

<script type="module">
  import { io } from "https://cdn.socket.io/4.3.0/socket.io.esm.min.js";

  const socket = io();

  socket.emit("hello", "world");
</script>

The bundle size has been greatly reduced, thanks to:

• the migration to rollup
• the cleanup of some unused code
• the removal of debug calls from the bundle (explanation here)

And finally, the Socket.IO client is now compatible with Vite (#1492).

Links

• Server: Release notes / Diff
• Client: Release notes / Diff
• ws version: ~8.2.3 (diff)

Size of the bundles:

	min	min+gzip
socket.io.min.js	39.9 KB (-24.6 KB ⬇️)	12.9 KB (-3.1 KB ⬇️)
socket.io.msgpack.min.js	45.1 KB (-25.6 KB ⬇️)	14 KB (-2.6 KB ⬇️)
socket.io.esm.min.js	32.7 KB	11.1 KB

That's all for this release, thanks for reading!