Sourced from socket.io's releases.

4.5.0

Bug Fixes

• typings: ensure compatibility with TypeScript 3.x (#4259) (02c87a8)

Features

• add support for catch-all listeners for outgoing packets (531104d)

This is similar to onAny(), but for outgoing packets.

Syntax:

socket.onAnyOutgoing((event, ...args) => {
  console.log(event);
});

• broadcast and expect multiple acks (8b20457)

Syntax:

io.timeout(1000).emit("some-event", (err, responses) => {
  // ...
});

• add the "maxPayload" field in the handshake details (088dcb4)

So that clients in HTTP long-polling can decide how many packets they have to send to stay under the maxHttpBufferSize value.

This is a backward compatible change which should not mandate a new major revision of the protocol (we stay in v4), as we only add a field in the JSON-encoded handshake data:

0{"sid":"lv_VI97HAXpY6yYWAAAC","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":5000,"maxPayload":1000000}

Links:

• Diff: socketio/socket.io@4.4.1...4.5.0
• Client release: 4.5.0
• engine.io version: ~6.2.0 (diff)
• ws version: ~8.2.3

Sourced from socket.io's changelog.

4.5.0 (2022-04-23)

Bug Fixes

• typings: ensure compatibility with TypeScript 3.x (#4259) (02c87a8)

Features

• add support for catch-all listeners for outgoing packets (531104d)

This is similar to onAny(), but for outgoing packets.

Syntax:

socket.onAnyOutgoing((event, ...args) => {
  console.log(event);
});

• broadcast and expect multiple acks (8b20457)

Syntax:

io.timeout(1000).emit("some-event", (err, responses) => {
  // ...
});

• add the "maxPayload" field in the handshake details (088dcb4)

So that clients in HTTP long-polling can decide how many packets they have to send to stay under the maxHttpBufferSize value.

This is a backward compatible change which should not mandate a new major revision of the protocol (we stay in v4), as we only add a field in the JSON-encoded handshake data:

0{"sid":"lv_VI97HAXpY6yYWAAAC","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":5000,"maxPayload":1000000}

• 8ecfcba chore(release): 4.5.0
• 572133a docs(examples): update example with webpack
• 6e1bb62 chore: bump engine.io to version 6.2.0
• 06e6838 docs(examples): add server bundling example with rollup
• 1f03a44 docs(examples): update create-react-app example (#4347)
• be3d7f0 docs(examples): add TODO example with Postgres and Node.js cluster
• d12aab2 docs(examples): add example with express-session
• 9f75868 docs(examples): pin the version of karma-jasmine-html-reporter
• 0b35dc7 refactor: make the protocol implementation stricter
• 531104d feat: add support for catch-all listeners for outgoing packets
• Additional commits viewable in compare view

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