fix(deps): update socket.io packages to v4 (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
socket.io	^3.0.0 -> ^4.0.0
socket.io-client	2.5.0 -> 4.7.5

---

Release Notes

socketio/socket.io (socket.io)

v4.7.5

Compare Source

Bug Fixes

• close the adapters when the server is closed (bf64870)
• remove duplicate pipeline when serving bundle (e426f3e)

Dependencies

• engine.io@~6.5.2 (no change)
• ws@~8.11.0 (no change)

v4.7.4

Compare Source

Bug Fixes

• typings: calling io.emit with no arguments incorrectly errored (cb6d2e0), closes #​4914

Dependencies

• engine.io@~6.5.2 (no change)
• ws@~8.11.0 (no change)

v4.7.3

Compare Source

Bug Fixes

• return the first response when broadcasting to a single socket (#​4878) (df8e70f)
• typings: allow to bind to a non-secure Http2Server (#​4853) (8c9ebc3)

Dependencies

• engine.io@~6.5.2 (no change)
• ws@~8.11.0 (no change)

v4.7.2

Compare Source

Bug Fixes

• clean up child namespace when client is rejected in middleware (#​4773) (0731c0d)
• webtransport: properly handle WebTransport-only connections (3468a19)
• webtransport: add proper framing (a306db0)

Dependencies

• engine.io@~6.5.2 (diff)
• ws@~8.11.0 (no change)

v4.7.1

Compare Source

The client bundle contains a few fixes regarding the WebTransport support.

Dependencies

• engine.io@~6.5.0 (no change)
• ws@~8.11.0 (no change)

v4.7.0

Compare Source

Bug Fixes

• remove the Partial modifier from the socket.data type (#​4740) (e5c62ca)

Features

Support for WebTransport

The Socket.IO server 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/

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

import { readFileSync } from "fs";
import { createServer } from "https";
import { Server } from "socket.io";
import { Http3Server } from "@​fails-components/webtransport";

// WARNING: the total length of the validity period MUST NOT exceed two weeks (https://w3c.github.io/webtransport/#custom-certificate-requirements)
const cert = readFileSync("/path/to/my/cert.pem");
const key = readFileSync("/path/to/my/key.pem");

const httpsServer = createServer({
  key,
  cert
});

httpsServer.listen(3000);

const io = new Server(httpsServer, {
  transports: ["polling", "websocket", "webtransport"] // WebTransport is not enabled by default
});

const h3Server = new Http3Server({
  port: 3000,
  host: "0.0.0.0",
  secret: "changeit",
  cert,
  privKey: key,
});

(async () => {
  const stream = await h3Server.sessionStream("/socket.io/");
  const sessionReader = stream.getReader();

  while (true) {
    const { done, value } = await sessionReader.read();
    if (done) {
      break;
    }
    io.engine.onWebTransportSession(value);
  }
})();

h3Server.startServer();

Added in 123b68c.

Client bundles with CORS headers

The bundles will now have the right Access-Control-Allow-xxx headers.

Added in 63f181c.

Dependencies

• engine.io@~6.5.0 (diff)
• ws@~8.11.0 (no change)

v4.6.2

Compare Source

Bug Fixes

• exports: move types condition to the top (#​4698) (3d44aae)

Dependencies

• engine.io@~6.4.2 (diff)
• ws@~8.11.0 (no change)

v4.6.1

Compare Source

Bug Fixes

• properly handle manually created dynamic namespaces (0d0a7a2)
• types: fix nodenext module resolution compatibility (#​4625) (d0b22c6)

Dependencies

• engine.io@~6.4.1 (diff)
• ws@~8.11.0 (no change)

v4.6.0

Compare Source

Bug Fixes

• add timeout method to remote socket (#​4558) (0c0eb00)
• typings: properly type emits with timeout (f3ada7d)

Features

Promise-based acknowledgements

This commit adds some syntactic sugar around acknowledgements:

• emitWithAck()

try {
  const responses = await io.timeout(1000).emitWithAck("some-event");
  console.log(responses); // one response per client
} catch (e) {
  // some clients did not acknowledge the event in the given delay
}

io.on("connection", async (socket) => {
    // without timeout
  const response = await socket.emitWithAck("hello", "world");

  // with a specific timeout
  try {
    const response = await socket.timeout(1000).emitWithAck("hello", "world");
  } catch (err) {
    // the client did not acknowledge the event in the given delay
  }
});

• serverSideEmitWithAck()

try {
  const responses = await io.timeout(1000).serverSideEmitWithAck("some-event");
  console.log(responses); // one response per server (except itself)
} catch (e) {
  // some servers did not acknowledge the event in the given delay
}

Added in 184f3cf.

Connection state recovery

This feature allows a client to reconnect after a temporary disconnection and restore its state:

• id
• rooms
• data
• missed packets

Usage:

import { Server } from "socket.io";

const io = new Server({
  connectionStateRecovery: {
    // default values
    maxDisconnectionDuration: 2 * 60 * 1000,
    skipMiddlewares: true,
  },
});

io.on("connection", (socket) => {
  console.log(socket.recovered); // whether the state was recovered or not
});

Here's how it works:

• the server sends a session ID during the handshake (which is different from the current id attribute, which is public and can be freely shared)
• the server also includes an offset in each packet (added at the end of the data array, for backward compatibility)
• upon temporary disconnection, the server stores the client state for a given delay (implemented at the adapter level)
• upon reconnection, the client sends both the session ID and the last offset it has processed, and the server tries to restore the state

The in-memory adapter already supports this feature, and we will soon update the Postgres and MongoDB adapters. We will also create a new adapter based on Redis Streams, which will support this feature.

Added in 54d5ee0.

Compatibility (for real) with Express middlewares

This feature implements middlewares at the Engine.IO level, because Socket.IO middlewares are meant for namespace authorization and are not executed during a classic HTTP request/response cycle.

Syntax:

io.engine.use((req, res, next) => {
  // do something

  next();
});

// with express-session
import session from "express-session";

io.engine.use(session({
  secret: "keyboard cat",
  resave: false,
  saveUninitialized: true,
  cookie: { secure: true }
}));

// with helmet
import helmet from "helmet";

io.engine.use(helmet());

A workaround was possible by using the allowRequest option and the "headers" event, but this feels way cleaner and works with upgrade requests too.

Added in 24786e7.

Error details in the disconnecting and disconnect events

The disconnect event will now contain additional details about the disconnection reason.

io.on("connection", (socket) => {
  socket.on("disconnect", (reason, description) => {
    console.log(description);
  });
});

Added in 8aa9499.

Automatic removal of empty child namespaces

This commit adds a new option, "cleanupEmptyChildNamespaces". With this option enabled (disabled by default), when a socket disconnects from a dynamic namespace and if there are no other sockets connected to it then the namespace will be cleaned up and its adapter will be closed.

import { createServer } from "node:http";
import { Server } from "socket.io";

const httpServer = createServer();
const io = new Server(httpServer, {
  cleanupEmptyChildNamespaces: true
});

Added in 5d9220b.

A new "addTrailingSlash" option

The trailing slash which was added by default can now be disabled:

import { createServer } from "node:http";
import { Server } from "socket.io";

const httpServer = createServer();
const io = new Server(httpServer, {
  addTrailingSlash: false
});

In the example above, the clients can omit the trailing slash and use /socket.io instead of /socket.io/.

Added in d0fd474.

Performance Improvements

• precompute the WebSocket frames when broadcasting (da2b542)

Dependencies

• engine.io@~6.4.0 (socketio/engine.io@6.2.1...6.4.0)
• ws@~8.11.0 (websockets/ws@8.2.3...8.11.0)

v4.5.4

Compare Source

This release contains a bump of:

• engine.io in order to fix CVE-2022-41940
• socket.io-parser in order to fix CVE-2022-2421.

Dependencies

• engine.io@~6.2.1 (diff)
• ws@~8.2.3 (no change)

v4.5.3

Compare Source

Bug Fixes

• typings: accept an HTTP2 server in the constructor (d3d0a2d)
• typings: apply types to "io.timeout(...).emit()" calls (e357daf)

Dependencies

• engine.io@~6.2.0 (no change)
• ws@~8.2.3 (no change)

v4.5.2

Compare Source

Bug Fixes

• prevent the socket from joining a room after disconnection (18f3fda)
• uws: prevent the server from crashing after upgrade (ba497ee)

Dependencies

• engine.io@~6.2.0 (no change)
• ws@~8.2.3 (no change)

v4.5.1

Compare Source

Bug Fixes

• forward the local flag to the adapter when using fetchSockets() (30430f0)
• typings: add HTTPS server to accepted types (#​4351) (9b43c91)

Dependencies

• engine.io@~6.2.0 (no change)
• ws@~8.2.3 (no change)

v4.5.0

Compare Source

Bug Fixes

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

Features

Catch-all listeners for outgoing packets

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

Syntax:

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

Added in 531104d.

Broadcast and expect multiple acknowledgements

Syntax:

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

Added in 8b20457.

maxHttpBufferSize value negotiation

A "maxPayload" field is now included in the Engine.IO handshake, 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}

Added in 088dcb4.

Dependencies

• engine.io@~6.2.0 (socketio/engine.io@6.1.0...6.2.0)
• ws@~8.2.3 (no change)

4.4.1 (2022-01-06)

Bug Fixes

• types: make RemoteSocket.data type safe (#​4234) (770ee59)
• types: pass SocketData type to custom namespaces (#​4233) (f2b8de7)

v4.4.1

Compare Source

Bug Fixes

• types: make RemoteSocket.data type safe (#​4234) (770ee59)
• types: pass SocketData type to custom namespaces (#​4233) (f2b8de7)

v4.4.0

Compare Source

Bug Fixes

• only set 'connected' to true after middleware execution (02b0f73)

Features

• add an implementation based on uWebSockets.js (c0d8c5a)
• add timeout feature (f0ed42f)
• add type information to socket.data (#​4159) (fe8730c)

4.3.2 (2021-11-08)

Bug Fixes

• fix race condition in dynamic namespaces (#​4137) (9d86397)

4.3.1 (2021-10-16)

Bug Fixes

• fix server attachment (#​4127) (0ef2a4d)

v4.3.2

Compare Source

Bug Fixes

• fix race condition in dynamic namespaces (#​4137) (9d86397)

v4.3.1

Compare Source

Bug Fixes

• fix server attachment (#​4127) (0ef2a4d)

v4.3.0

Compare Source

Bug Fixes

• typings: add name field to cookie option (#​4099) (033c5d3)
• send volatile packets with binary attachments (dc81fcf)

Features

• serve ESM bundle (60edecb)

v4.2.0

Compare Source

Bug Fixes

• typings: allow async listener in typed events (ccfd8ca)

Features

• ignore the query string when serving client JavaScript (#​4024) (24fee27)

4.1.3 (2021-07-10)

Bug Fixes

• fix io.except() method (94e27cd)
• remove x-sourcemap header (a4dffc6)

4.1.2 (2021-05-17)

Bug Fixes

• typings: ensure compatibility with TypeScript 3.x (0cb6ac9)
• ensure compatibility with previous versions of the adapter (a2cf248)

4.1.1 (2021-05-11)

Bug Fixes

• typings: properly type server-side events (b84ed1e)
• typings: properly type the adapter attribute (891b187)

v4.1.3

Compare Source

Bug Fixes

• fix io.except() method (94e27cd)
• remove x-sourcemap header (a4dffc6)

v4.1.2

Compare Source

Bug Fixes

• typings: ensure compatibility with TypeScript 3.x (0cb6ac9)
• ensure compatibility with previous versions of the adapter (a2cf248)

v4.1.1

Compare Source

Bug Fixes

• typings: properly type server-side events (b84ed1e)
• typings: properly type the adapter attribute (891b187)

v4.1.0

Compare Source

Features

• add support for inter-server communication (93cce05)
• notify upon namespace creation (499c892)
• add a "connection_error" event (7096e98, from engine.io)
• add the "initial_headers" and "headers" events (2527543, from engine.io)

Performance Improvements

• add support for the "wsPreEncoded" writing option (dc381b7)

4.0.2 (2021-05-06)

Bug Fixes

• typings: make "engine" attribute public (b81ce4c)
• properly export the Socket class (d65b6ee)

4.0.1 (2021-03-31)

Bug Fixes

• typings: add fallback to untyped event listener (#​3834) (a11152f)
• typings: update return type from emit (#​3843) (1a72ae4)

v4.0.2

Compare Source

Bug Fixes

• typings: make "engine" attribute public (b81ce4c)
• properly export the Socket class (d65b6ee)

v4.0.1

Compare Source

Bug Fixes

• typings: add fallback to untyped event listener (#​3834) (a11152f)
• typings: update return type from emit (#​3843) (1a72ae4)

v4.0.0

Compare Source

Bug Fixes

• make io.to(...) immutable (ac9e8ca)

Features

• add some utility methods (b25495c)
• add support for typed events (#​3822) (0107510)
• allow to exclude specific rooms when broadcasting (#​3789) (7de2e87)
• allow to pass an array to io.to(...) (085d1de)

3.1.2 (2021-02-26)

Bug Fixes

• ignore packets received after disconnection (494c64e)

3.1.1 (2021-02-03)

Bug Fixes

• properly parse the CONNECT packet in v2 compatibility mode (6f4bd7f)
• typings: add return types and general-case overload signatures (#​3776) (9e8f288)
• typings: update the types of "query", "auth" and "headers" (4f2e9a7)

socketio/socket.io-client (socket.io-client)

v4.7.5

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Bug Fixes

• discard acknowledgements upon disconnection (34cbfbb)

Dependencies

• engine.io-client@~6.5.2 (no change)
• ws@~8.11.0 (no change)

v4.7.4

Compare Source

There were some minor bug fixes on the server side, which mandate a client bump.

Dependencies

• engine.io-client@~6.5.2 (no change)
• ws@~8.11.0 (no change)

v4.7.3

Compare Source

Bug Fixes

• improve compatibility with node16 module resolution (#​1595) (605de78)
• typings: accept string | undefined as init argument (5a3eafe)
• typings: fix the type of the socket#id attribute (f9c16f2)

Dependencies

• engine.io-client@~6.5.2 (no change)
• ws@~8.11.0 (no change)

v4.7.2

Compare Source

Some bug fixes are included from the engine.io-client package:

• webtransport: add proper framing (d55c39e)
• webtransport: honor the binaryType attribute (8270e00)

Dependencies

• engine.io-client@~6.5.2 (diff)
• ws@~8.11.0 (no change)

v4.7.1

Compare Source

Some bug fixes are included from the engine.io-client package:

• make closeOnBeforeunload default to false (a63066b)
• webtransport: properly handle abruptly closed connections (cf6aa1f)

Dependencies

• engine.io-client@~6.5.1 (diff)
• ws@~8.11.0 (no change)

v4.7.0

Compare Source

Bug Fixes

• properly report timeout error when connecting (5bc94b5)
• use same scope for setTimeout and clearTimeout calls (#​1568) (f2892ab)

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 { io } from "socket.io-client";

const socket = io("https://example.com", {
  withCredentials: true
});

Added in 5fc88a6.

Conditional import of the ESM build with debug logs

By default, the ESM build does not include the debug package in the browser environments, because it increases the bundle size (see 16b6569).

Which means that, unfortunately, debug logs are not available in the devtools console, even when setting the localStorage.debug = ... attribute.

You can now import the build which includes the debug packages with a conditional import. Example with vite:

import { defineConfig } from 'vite'
import react from '@​vitejs/plugin-react'

export default defineConfig({
  plugins: [react()],
  server: {
    port: 4000
  },
  resolve: {
    conditions: ["development"]
  }
})

Reference: https://v2.vitejs.dev/config/#resolve-conditions

Added in 781d753.

Dependencies

• engine.io-client@~6.5.0 (diff)
• ws@~8.11.0 (no change)

v4.6.2

Compare Source

Bug Fixes

• exports: move types condition to the top (#​1580) (7ead241)

Dependencies

• engine.io-client@~6.4.0 (no change)
• ws@~8.11.0 (no change)

v4.6.1

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Bug Fixes

• do not drain the queue while the socket is offline (4996f9e)
• prevent duplicate connections when multiplexing (46213a6)

Dependencies

• engine.io-client@~6.4.0 (no change)
• ws@~8.11.0 (no change)

v4.6.0

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Bug Fixes

• typings: do not expose browser-specific types (4d6d95e)
• ensure manager.socket() returns an active socket (b7dd891)
• typings: properly type emits with timeout (#​1570) (33e4172)

Features

A new "addTrailingSlash" option

The trailing slash which was added by default can now be disabled:

import { io } from "socket.io-client";

const socket = io("https://example.com", {
  addTrailingSlash: false
});

In the example above, the request URL will be https://example.com/socket.io instead of https://example.com/socket.io/.

Added in 21a6e12.

Promise-based acknowledgements

This commit adds some syntactic sugar around acknowledgements:

// without timeout
const response = await socket.emitWithAck("hello", "world");

// with a specific timeout
try {
  const response = await socket.timeout(1000).emitWithAck("hello", "world");
} catch (err) {
  // the server did not acknowledge the event in the given delay
}

Note: environments that do not support Promises will need to add a polyfill in order to use this feature.

Added in 47b979d.

Connection state recovery

This feature allows a client to reconnect after a temporary disconnection and restore its ID and receive any packets that was missed during the disconnection gap. It must be enabled on the server side.

A new boolean attribute named recovered is added on the socket object:

socket.on("connect", () => {
  console.log(socket.recovered); // whether the recovery was successful
});

Added in 54d5ee0 (server) and b4e20c5 (client).

Retry mechanism

Two new options are available:

• retries: the maximum number of retries. Above the limit, the packet will be discarded.
• ackTimeout: the default timeout in milliseconds used when waiting for an acknowledgement (not to be mixed up with the already existing timeout option, which is used by the Manager during the connection)

const socket = io({
  retries: 3,
  ackTimeout: 10000
});

// implicit ack
socket.emit("my-event");

// explicit ack
socket.emit("my-event", (err, val) => { /* ... */ });

// custom timeout (in that case the ackTimeout is optional)
socket.timeout(5000).emit("my-event", (err, val) => { /* ... */ });

In all examples above, "my-event" will be sent up to 4 times (1 + 3), until the server sends an acknowledgement.

Assigning a unique ID to each packet is the duty of the user, in order to allow deduplication on the server side.

Added in 655dce9.

Dependencies

• engine.io-client@~6.4.0 (diff)
• ws@~8.11.0 (diff)

v4.5.4

Compare Source

This release contains a bump of the socket.io-parser dependency, in order to fix CVE-2022-2421.

Dependencies

• engine.io-client@~6.2.3 (no change)
• ws@~8.2.3 (no change)

v4.5.3

Compare Source

Bug Fixes

• do not swallow user exceptions (2403b88)

Dependencies

• engine.io-client@~6.2.3 (socketio/engine.io-client@6.2.1...6.2.3)
• ws@~8.2.3 (no change)

v4.5.2

Compare Source

Bug Fixes

• handle ill-formatted packet from server (c597023)

Dependencies

• engine.io-client@~6.2.1 (no change)
• ws@~8.2.3 (no change)

v4.5.1

Compare Source

There were some minor bug fixes on the server side, which mandate a client bump.

Dependencies

• engine.io-client@~6.2.1 (no change)
• ws@~8.2.3 (no change)

v4.5.0

Compare Source

Features

Additional details for the disconnect event

The "disconnect" event will now include additional details to help debugging if anything has gone wrong.

Example when a payload is over the maxHttpBufferSize value in HTTP long-polling mode:

socket.on("disconnect", (reason, details) => {
  console.log(reason); // "transport error"

  // in that case, details is an error object
  console.log(details.message); "xhr post error"
  console.log(details.description); // 413 (the HTTP status of the response)

  // details.context refers to the XMLHttpRequest object
  console.log(details.context.status); // 413
  console.log(details.context.responseText); // ""
});

Added in b862924.

Catch-all listeners for outgoing packets

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

Syntax:

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

Added in 74e3e60.

Slice write buffer according to the maxPayload value

The server will now include a "maxPayload" field in the handshake details, allowing the clients to decide how many packets they have to send to stay under the maxHttpBufferSize value.

Added in 46fdc2f.

Dependencies

• engine.io-client@~6.2.1 (socketio/engine.io-client@6.1.1...6.2.1)
• ws@~8.2.3 (no change)

4.4.1 (2022-01-06)

v4.4.1

Compare Source

v4.4.0

Compare Source

Bug Fixes

• add package name in nested package.json (53d8fca), closes socketio/socket.io-client#1513
• fix socket.disconnect().connect() usage (99c2cb8)
• prevent socket from reconnecting after middleware failure (d54d12c)

Features

• add timeout feature (ccf7998)

socket.timeout(5000).emit("my-event", (err) => {
  if (err) {
    // the server did not acknowledge the event in the given delay
  }
});

4.3.2 (2021-10-16)

Bug Fixes

• restore the default export (bis) (6780f29)

4.3.1 (2021-10-15)

Bug Fixes

• restore the default export (f0aae84)
• restore the namespace export (8737d0a)

v4.3.2

Compare Source

Bug Fixes

• restore the default export (bis) (6780f29)

v4.3.1

Compare Source

Bug Fixes

• restore the default export (f0aae84)
• restore the namespace export (8737d0a)

v4.3.0

Compare Source

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>

Features

• typings: add missing types for some emitter methods (#​1502) (a9e5b85)
• provide an ESM build with and without debug (16b6569)
• migrate to rollup (0661564)

v4.2.0

Compare Source

Bug Fixes

• typings: allow async listener in typed events (66e00b7)
• allow to set randomizationFactor to 0 (#​1447) (dfb46b5)

Features

• add an option to use native timer functions (#​1479) (4e1b656)

4.1.3 (2021-07-10)

4.1.2 (2021-05-17)

Bug Fixes

• typings: add missing closeOnBeforeunload option (#​1469) (35d27df)
• typings: add missing requestTimeout option (#​1467) (c8dfbb1)

4.1.1 (2021-05-11)

There were some minor bug fixes on the server side, which mandate a client bump.

v4.1.3

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v4.1.2

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Bug Fixes

• typings: add missing closeOnBeforeunload option (#​1469) (35d27df)
• typings: add missing requestTimeout option (#​1467) (c8dfbb1)

v4.1.1

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There were some minor bug fixes on the server side, which mandate a client bump.

v4.1.0

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Features

• add the "closeOnBeforeunload" option (dcb85e9, from engine.io-client)

4.0.2 (2021-05-06)

Bug Fixes

• typings: add fallback to untyped event listener (5394669)
• ensure buffered events are sent in order (34f822f)
• ensure connections are properly multiplexed (dd2a8fc)
• properly export the Socket class (e20d487)

4.0.1 (2021-03-31)

Bug Fixes

• typings: make auth property public (#​1455) (c150223)
• typings: update definition to match wrapper.mjs (#​1456) (48f573f)

3.1.3 (2021-03-12)

Bug Fixes

• bundle: restore support for JS modules (afa7953)

v4.0.2

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Bug Fixes

• typings: add fallback to untyped event listener (5394669)
• ensure buffered events are sent in order (34f822f)
• ensure connections are properly multiplexed (dd2a8fc)
• properly export the Socket class ([e20d487](https://togithub.com/socketio/socket.io-clien

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