3.1.1

Bug Fixes

• include the path in the manager ID (7a0c2b5)
• remove polyfill for process in the bundle (61afc5d)
• typings: add return types and general-case overload signatures (#1440) (47f917a)
• typings: fix the type of the "query" option (#1439) (f02ab3b)

Links:

• Diff: 3.1.0...3.1.1
• Server release: 3.1.1
• engine.io-client version: ~4.1.0
• ws version: ~7.4.2
• Build size
  • socket.io.min.js: 60.2 KB (+ 0.1 KB)
  • socket.io.msgpack.min.js: 61.3 KB (+ 0.1 KB)

3.1.0

Bug Fixes

• typings: make Manager#opts public (#1437) (fe97243)
• allow integers as event names (1c220dd)

Links:

• Diff: 3.0.5...3.1.0
• Server release: 3.1.0
• engine.io-client version: ~4.1.0
• ws version: ~7.4.2
• Build size
  • socket.io.min.js: 60.1 KB (+ 0.1 KB)
  • socket.io.msgpack.min.js: 61.2 KB (+ 0.1 KB)

3.0.5

Bug Fixes

• emit a connect_error event upon connection failure (53c7374)
• typings: make sendBuffer and receiveBuffer public (b83f89c)

Links:

• Milestone: -
• Diff: 3.0.4...3.0.5
• Server release: 3.0.5
• engine.io-client version: ~4.0.6
• ws version: ~7.4.2
• Build size
  • socket.io.min.js: 60 KB (- 0.4 KB)
  • socket.io.msgpack.min.js: 61.1 KB (- 0.3 KB)

2.4.0

The minor bump is matching the bump of the server, but there is no new feature in this release.

Links:

• Milestone: -
• Diff: 2.3.1...2.4.0
• Server release: 2.4.0
• engine.io-client version: ~3.5.0
• ws version: ~7.4.2

3.0.4

Bug Fixes

• emit an error when reaching a v2.x server (ec1f8c3)
• keep track of active sockets (f8f60fc)
• typings: export extraHeaders option (#1410) (b3de861)

Links:

• Milestone: 3.0.4
• Diff: 3.0.3...3.0.4
• Server release: 3.0.4
• engine.io-client version: ~4.0.0
• ws version: ~7.2.1
• Build size
  • socket.io.min.js: 60.4 KB (+ 0.2 KB)
  • socket.io.msgpack.min.js: 61.4 KB (+ 0.1 KB)

3.0.3

Bug Fixes

• properly export io in ES modules wrapper (bec1524)

Links:

• Milestone: 3.0.3
• Diff: 3.0.2...3.0.3
• Server release: 3.0.3
• engine.io-client version: ~4.0.0
• ws version: ~7.2.1
• Build size
  • socket.io.min.js: 60.2 KB
  • socket.io.msgpack.min.js: 61.3 KB

3.0.2

Bug Fixes

• typings: export withCredentials option (7193078)
• typings: export ManagerOptions (#1398) (96cd2c9)
• add io as named exports (7b3ec9f)

Links:

• Milestone: 3.0.2
• Diff: 3.0.1...3.0.2
• Server release: 3.0.2
• engine.io-client version: ~4.0.0
• ws version: ~7.2.1
• Build size
  • socket.io.min.js: 60.2 KB (-0.4 KB)
  • socket.io.msgpack.min.js: 61.3 KB (-0.4 KB)

3.0.1

Bug Fixes

• typings: export Socket and SocketOptions types (#1394) (19ab1e9)

Links:

• Milestone: 3.0.1
• Diff: 3.0.0...3.0.1
• Server release: 3.0.1
• engine.io-client version: ~4.0.0
• ws version: ~7.2.1
• Build size
  • socket.io.min.js: 60.6 KB (-0.2 KB)
  • socket.io.msgpack.min.js: 61.7 KB (-0.1 KB)

3.0.0

More details about this release in the blog post: https://socket.io/blog/socket-io-3-release/

Dedicated migration guide: https://socket.io/docs/migrating-from-2-x-to-3-0/

Features

• emit an Error object upon middleware error (0939395)
• add bundle with msgpack parser (71d6048)
• add support for catch-all listeners (55f464f)
• add volatile events (7ddad2c)
• move binary detection back to the parser (1789094)
• add ES6 module export (cbabb03)
• do not reuse the Engine.IO id (bbe94ad)
• remove the implicit connection to the default namespace (249e0be)
• split the events of the Manager and Socket (132f8ec)
• throw upon reserved event names (6494f61)

BREAKING CHANGES

• the Socket instance will now emit a "connect_error" event instead of "error" (which is not a reserved event anymore)

// before
socket.on("error", () => {});

// after
socket.on("connect_error", () => {});

• the Socket#binary() method is removed, as this use case is now covered by the ability to provide your own parser.

• the Socket instance will no longer forward the events of its Manager

Those events can still be accessed on the Manager instance though:

socket.io.on("reconnect", () => {
  // ...
});

Links:

• Milestone: 3.0.0
• Diff: 2.3.1...3.0.0
• Server release: 3.0.0
• engine.io-client version: ~4.0.0
• ws version: ~7.2.1
• Build size
  • socket.io.min.js: 60.7 KB
  • socket.io.msgpack.min.js: 61.8 KB

3.0.0-rc4

Features

• emit an Error object upon middleware error (0939395)

Links:

• Milestone: 3.0.0
• Diff: 3.0.0-rc3...3.0.0-rc4
• Server release: 3.0.0-rc4
• engine.io-client version: ~4.0.0
• ws version: ~6.1.0
• Build size
  • socket.io.min.js: 60.7 KB (-0.1 KB)
  • socket.io.msgpack.min.js: 61.8 KB (-0.2 KB)