chore(release): 4.2.0

Diff: https://github.com/socketio/socket.io/compare/4.1.3...4.2.0

.github/workflows/ci.yml

@@ -12,12 +12,12 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 14.x, 15.x]
+        node-version: [12, 14, 16]
 
     steps:
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm ci

CHANGELOG.md

@@ -1,3 +1,34 @@
+# [4.2.0](https://github.com/socketio/socket.io/compare/4.1.3...4.2.0) (2021-08-30)
+
+
+### Bug Fixes
+
+* **typings:** allow async listener in typed events ([ccfd8ca](https://github.com/socketio/socket.io/commit/ccfd8caba6d38b7ba6c5114bd8179346ed07671c))
+
+
+### Features
+
+* ignore the query string when serving client JavaScript ([#4024](https://github.com/socketio/socket.io/issues/4024)) ([24fee27](https://github.com/socketio/socket.io/commit/24fee27ba36485308f8e995879c10931532c814e))
+
+
+## [4.1.3](https://github.com/socketio/socket.io/compare/4.1.2...4.1.3) (2021-07-10)
+
+
+### Bug Fixes
+
+* fix io.except() method ([94e27cd](https://github.com/socketio/socket.io/commit/94e27cd072c8a4eeb9636f6ffbb7a21d382f36b0))
+* remove x-sourcemap header ([a4dffc6](https://github.com/socketio/socket.io/commit/a4dffc6527f412d51a786ae5bf2e9080fe1ca63c))
+
+
+## [4.1.2](https://github.com/socketio/socket.io/compare/4.1.1...4.1.2) (2021-05-17)
+
+
+### Bug Fixes
+
+* **typings:** ensure compatibility with TypeScript 3.x ([0cb6ac9](https://github.com/socketio/socket.io/commit/0cb6ac95b49a27483b6f1b6402fa54b35f82e36f))
+* ensure compatibility with previous versions of the adapter ([a2cf248](https://github.com/socketio/socket.io/commit/a2cf2486c366cb62293101c10520c57f6984a3fc))
+
+
 ## [4.1.1](https://github.com/socketio/socket.io/compare/4.1.0...4.1.1) (2021-05-11)
 
 

Readme.md

@@ -1,5 +1,5 @@
 # socket.io
-[![Run on Repl.it](https://repl.it/badge/github/socketio/socket.io)](https://repl.it/github/socketio/socket.io)
+[![Run on Repl.it](https://repl.it/badge/github/socketio/socket.io)](https://replit.com/@socketio/socketio-minimal-example)
 [![Backers on Open Collective](https://opencollective.com/socketio/backers/badge.svg)](#backers) [![Sponsors on Open Collective](https://opencollective.com/socketio/sponsors/badge.svg)](#sponsors)
 [![Build Status](https://github.com/socketio/socket.io/workflows/CI/badge.svg)](https://github.com/socketio/socket.io/actions)
 [![Dependency Status](https://david-dm.org/socketio/socket.io.svg)](https://david-dm.org/socketio/socket.io)

client-dist/socket.io.js

@@ -1,5 +1,5 @@
 /*!
- * Socket.IO v4.1.1
+ * Socket.IO v4.2.0
  * (c) 2014-2021 Guillermo Rauch
  * Released under the MIT License.
  */
@@ -142,7 +142,7 @@ function lookup(uri, opts) {
   }
 
   opts = opts || {};
-  var parsed = url_1.url(uri, opts.path || "/socket.io");
+  var parsed = (0, url_1.url)(uri, opts.path || "/socket.io");
   var source = parsed.source;
   var id = parsed.id;
   var path = parsed.path;
@@ -243,11 +243,11 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
@@ -258,6 +258,8 @@ exports.Manager = void 0;
 
 var eio = __webpack_require__(/*! engine.io-client */ "./node_modules/engine.io-client/lib/index.js");
 
+var util_1 = __webpack_require__(/*! engine.io-client/lib/util */ "./node_modules/engine.io-client/lib/util.js");
+
 var socket_1 = __webpack_require__(/*! ./socket */ "./build/socket.js");
 
 var parser = __webpack_require__(/*! socket.io-parser */ "./node_modules/socket.io-parser/dist/index.js");
@@ -280,6 +282,8 @@ var Manager = /*#__PURE__*/function (_typed_events_1$Stric) {
 
     _classCallCheck(this, Manager);
 
+    var _a;
+
     _this = _super.call(this);
     _this.nsps = {};
     _this.subs = [];
@@ -292,6 +296,7 @@ var Manager = /*#__PURE__*/function (_typed_events_1$Stric) {
     opts = opts || {};
     opts.path = opts.path || "/socket.io";
     _this.opts = opts;
+    (0, util_1.installTimerFunctions)(_assertThisInitialized(_this), opts);
 
     _this.reconnection(opts.reconnection !== false);
 
@@ -301,7 +306,7 @@ var Manager = /*#__PURE__*/function (_typed_events_1$Stric) {
 
     _this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
 
-    _this.randomizationFactor(opts.randomizationFactor || 0.5);
+    _this.randomizationFactor((_a = opts.randomizationFactor) !== null && _a !== void 0 ? _a : 0.5);
 
     _this.backoff = new Backoff({
       min: _this.reconnectionDelay(),
@@ -412,12 +417,12 @@ var Manager = /*#__PURE__*/function (_typed_events_1$Stric) {
       this._readyState = "opening";
       this.skipReconnect = false; // emit `open`
 
-      var openSubDestroy = on_1.on(socket, "open", function () {
+      var openSubDestroy = (0, on_1.on)(socket, "open", function () {
         self.onopen();
         fn && fn();
       }); // emit `error`
 
-      var errorSub = on_1.on(socket, "error", function (err) {
+      var errorSub = (0, on_1.on)(socket, "error", function (err) {
         debug("error");
         self.cleanup();
         self._readyState = "closed";
@@ -441,7 +446,7 @@ var Manager = /*#__PURE__*/function (_typed_events_1$Stric) {
         } // set timer
 
 
-        var timer = setTimeout(function () {
+        var timer = this.setTimeoutFn(function () {
           debug("connect attempt timed out after %d", timeout);
           openSubDestroy();
           socket.close();
@@ -490,7 +495,7 @@ var Manager = /*#__PURE__*/function (_typed_events_1$Stric) {
       this.emitReserved("open"); // add new subs
 
       var socket = this.engine;
-      this.subs.push(on_1.on(socket, "ping", this.onping.bind(this)), on_1.on(socket, "data", this.ondata.bind(this)), on_1.on(socket, "error", this.onerror.bind(this)), on_1.on(socket, "close", this.onclose.bind(this)), on_1.on(this.decoder, "decoded", this.ondecoded.bind(this)));
+      this.subs.push((0, on_1.on)(socket, "ping", this.onping.bind(this)), (0, on_1.on)(socket, "data", this.ondata.bind(this)), (0, on_1.on)(socket, "error", this.onerror.bind(this)), (0, on_1.on)(socket, "close", this.onclose.bind(this)), (0, on_1.on)(this.decoder, "decoded", this.ondecoded.bind(this)));
     }
     /**
      * Called upon a ping.
@@ -689,7 +694,7 @@ var Manager = /*#__PURE__*/function (_typed_events_1$Stric) {
         var delay = this.backoff.duration();
         debug("will wait %dms before reconnect attempt", delay);
         this._reconnecting = true;
-        var timer = setTimeout(function () {
+        var timer = this.setTimeoutFn(function () {
           if (self.skipReconnect) return;
           debug("attempting reconnect");
 
@@ -781,7 +786,7 @@ exports.on = on;
 
 function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
 
-function _createForOfIteratorHelper(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
+function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
 
 function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
 
@@ -803,11 +808,11 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
@@ -855,6 +860,8 @@ var Socket = /*#__PURE__*/function (_typed_events_1$Stric) {
     _classCallCheck(this, Socket);
 
     _this = _super.call(this);
+    _this.connected = false;
+    _this.disconnected = true;
     _this.receiveBuffer = [];
     _this.sendBuffer = [];
     _this.ids = 0;
@@ -862,13 +869,6 @@ var Socket = /*#__PURE__*/function (_typed_events_1$Stric) {
     _this.flags = {};
     _this.io = io;
     _this.nsp = nsp;
-    _this.ids = 0;
-    _this.acks = {};
-    _this.receiveBuffer = [];
-    _this.sendBuffer = [];
-    _this.connected = false;
-    _this.disconnected = true;
-    _this.flags = {};
 
     if (opts && opts.auth) {
       _this.auth = opts.auth;
@@ -889,20 +889,25 @@ var Socket = /*#__PURE__*/function (_typed_events_1$Stric) {
     value: function subEvents() {
       if (this.subs) return;
       var io = this.io;
-      this.subs = [on_1.on(io, "open", this.onopen.bind(this)), on_1.on(io, "packet", this.onpacket.bind(this)), on_1.on(io, "error", this.onerror.bind(this)), on_1.on(io, "close", this.onclose.bind(this))];
+      this.subs = [(0, on_1.on)(io, "open", this.onopen.bind(this)), (0, on_1.on)(io, "packet", this.onpacket.bind(this)), (0, on_1.on)(io, "error", this.onerror.bind(this)), (0, on_1.on)(io, "close", this.onclose.bind(this))];
     }
     /**
      * Whether the Socket will try to reconnect when its Manager connects or reconnects
      */
 
   }, {
-    key: "connect",
-
+    key: "active",
+    get: function get() {
+      return !!this.subs;
+    }
     /**
      * "Opens" the socket.
      *
      * @public
      */
+
+  }, {
+    key: "connect",
     value: function connect() {
       if (this.connected) return this;
       this.subEvents();
@@ -1335,8 +1340,11 @@ var Socket = /*#__PURE__*/function (_typed_events_1$Stric) {
      */
 
   }, {
-    key: "onAny",
-
+    key: "volatile",
+    get: function get() {
+      this.flags["volatile"] = true;
+      return this;
+    }
     /**
      * Adds a listener that will be fired when any event is emitted. The event name is passed as the first argument to the
      * callback.
@@ -1344,6 +1352,9 @@ var Socket = /*#__PURE__*/function (_typed_events_1$Stric) {
      * @param listener
      * @public
      */
+
+  }, {
+    key: "onAny",
     value: function onAny(listener) {
       this._anyListeners = this._anyListeners || [];
 
@@ -1409,17 +1420,6 @@ var Socket = /*#__PURE__*/function (_typed_events_1$Stric) {
     value: function listenersAny() {
       return this._anyListeners || [];
     }
-  }, {
-    key: "active",
-    get: function get() {
-      return !!this.subs;
-    }
-  }, {
-    key: "volatile",
-    get: function get() {
-      this.flags["volatile"] = true;
-      return this;
-    }
   }]);
 
   return Socket;
@@ -1457,11 +1457,11 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
@@ -1499,14 +1499,14 @@ var StrictEventEmitter = /*#__PURE__*/function (_Emitter) {
 
   _createClass(StrictEventEmitter, [{
     key: "on",
-
+    value:
     /**
      * Adds the `listener` function as an event listener for `ev`.
      *
      * @param ev Name of the event
      * @param listener Callback function
      */
-    value: function on(ev, listener) {
+    function on(ev, listener) {
       _get(_getPrototypeOf(StrictEventEmitter.prototype), "on", this).call(this, ev, listener);
 
       return this;
@@ -2003,11 +2003,7 @@ function useColors() {
   // document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
 
 
-  return typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance || // Is firebug? http://stackoverflow.com/a/398120/376773
-  typeof window !== 'undefined' && window.console && (window.console.firebug || window.console.exception && window.console.table) || // Is firefox >= v31?
-  // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
-  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31 || // Double check webkit in userAgent just in case we are in a worker
-  typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/);
+  return typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance || typeof window !== 'undefined' && window.console && (window.console.firebug || window.console.exception && window.console.table) || typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31 || typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/);
 }
 /**
  * Colorize log arguments if enabled.
@@ -2150,7 +2146,7 @@ function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread n
 
 function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
 
-function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter); }
+function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter); }
 
 function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) return _arrayLikeToArray(arr); }
 
@@ -2215,6 +2211,8 @@ function setup(env) {
   function createDebug(namespace) {
     var prevTime;
     var enableOverride = null;
+    var namespacesCache;
+    var enabledCache;
 
     function debug() {
       for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
@@ -2278,7 +2276,16 @@ function setup(env) {
       enumerable: true,
       configurable: false,
       get: function get() {
-        return enableOverride === null ? createDebug.enabled(namespace) : enableOverride;
+        if (enableOverride !== null) {
+          return enableOverride;
+        }
+
+        if (namespacesCache !== createDebug.namespaces) {
+          namespacesCache = createDebug.namespaces;
+          enabledCache = createDebug.enabled(namespace);
+        }
+
+        return enabledCache;
       },
       set: function set(v) {
         enableOverride = v;
@@ -2308,6 +2315,7 @@ function setup(env) {
 
   function enable(namespaces) {
     createDebug.save(namespaces);
+    createDebug.namespaces = namespaces;
     createDebug.names = [];
     createDebug.skips = [];
     var i;
@@ -2490,11 +2498,11 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
@@ -2510,6 +2518,9 @@ var parseuri = __webpack_require__(/*! parseuri */ "./node_modules/parseuri/inde
 
 var parseqs = __webpack_require__(/*! parseqs */ "./node_modules/parseqs/index.js");
 
+var _require = __webpack_require__(/*! ./util */ "./node_modules/engine.io-client/lib/util.js"),
+    installTimerFunctions = _require.installTimerFunctions;
+
 var Socket = /*#__PURE__*/function (_Emitter) {
   _inherits(Socket, _Emitter);
 
@@ -2546,6 +2557,7 @@ var Socket = /*#__PURE__*/function (_Emitter) {
       opts.hostname = parseuri(opts.host).host;
     }
 
+    installTimerFunctions(_assertThisInitialized(_this), opts);
     _this.secure = null != opts.secure ? opts.secure : typeof location !== "undefined" && "https:" === location.protocol;
 
     if (opts.hostname && !opts.port) {
@@ -2665,7 +2677,7 @@ var Socket = /*#__PURE__*/function (_Emitter) {
         transport = "websocket";
       } else if (0 === this.transports.length) {
         // Emit error on next tick so it can be listened to
-        setTimeout(function () {
+        this.setTimeoutFn(function () {
           _this2.emit("error", "No transports available");
         }, 0);
         return;
@@ -2883,6 +2895,7 @@ var Socket = /*#__PURE__*/function (_Emitter) {
           case "ping":
             this.resetPingTimeout();
             this.sendPacket("pong");
+            this.emit("ping");
             this.emit("pong");
             break;
 
@@ -2933,8 +2946,8 @@ var Socket = /*#__PURE__*/function (_Emitter) {
     value: function resetPingTimeout() {
       var _this5 = this;
 
-      clearTimeout(this.pingTimeoutTimer);
-      this.pingTimeoutTimer = setTimeout(function () {
+      this.clearTimeoutFn(this.pingTimeoutTimer);
+      this.pingTimeoutTimer = this.setTimeoutFn(function () {
         _this5.onClose("ping timeout");
       }, this.pingInterval + this.pingTimeout);
 
@@ -3122,8 +3135,8 @@ var Socket = /*#__PURE__*/function (_Emitter) {
       if ("opening" === this.readyState || "open" === this.readyState || "closing" === this.readyState) {
         debug('socket close with reason: "%s"', reason); // clear timers
 
-        clearTimeout(this.pingIntervalTimer);
-        clearTimeout(this.pingTimeoutTimer); // stop event from firing again for transport
+        this.clearTimeoutFn(this.pingIntervalTimer);
+        this.clearTimeoutFn(this.pingTimeoutTimer); // stop event from firing again for transport
 
         this.transport.removeAllListeners("close"); // ensure transport won't stay open
 
@@ -3219,11 +3232,11 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
@@ -3231,6 +3244,9 @@ var parser = __webpack_require__(/*! engine.io-parser */ "./node_modules/engine.
 
 var Emitter = __webpack_require__(/*! component-emitter */ "./node_modules/component-emitter/index.js");
 
+var _require = __webpack_require__(/*! ./util */ "./node_modules/engine.io-client/lib/util.js"),
+    installTimerFunctions = _require.installTimerFunctions;
+
 var debug = __webpack_require__(/*! debug */ "./node_modules/debug/src/browser.js")("engine.io-client:transport");
 
 var Transport = /*#__PURE__*/function (_Emitter) {
@@ -3250,6 +3266,7 @@ var Transport = /*#__PURE__*/function (_Emitter) {
     _classCallCheck(this, Transport);
 
     _this = _super.call(this);
+    installTimerFunctions(_assertThisInitialized(_this), opts);
     _this.opts = opts;
     _this.query = opts.query;
     _this.readyState = "";
@@ -3386,7 +3403,7 @@ module.exports = Transport;
 /*! no static exports found */
 /***/ (function(module, exports, __webpack_require__) {
 
-var XMLHttpRequest = __webpack_require__(/*! ../../contrib/xmlhttprequest-ssl/XMLHttpRequest */ "./node_modules/engine.io-client/lib/xmlhttprequest.js");
+var XMLHttpRequest = __webpack_require__(/*! xmlhttprequest-ssl */ "./node_modules/engine.io-client/lib/xmlhttprequest.js");
 
 var XHR = __webpack_require__(/*! ./polling-xhr */ "./node_modules/engine.io-client/lib/transports/polling-xhr.js");
 
@@ -3460,11 +3477,11 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
@@ -3519,13 +3536,18 @@ var JSONPPolling = /*#__PURE__*/function (_Polling) {
 
 
   _createClass(JSONPPolling, [{
-    key: "doClose",
-
+    key: "supportsBinary",
+    get: function get() {
+      return false;
+    }
     /**
      * Closes the socket.
      *
      * @api private
      */
+
+  }, {
+    key: "doClose",
     value: function doClose() {
       if (this.script) {
         // prevent spurious errors from being emitted when the window is unloaded
@@ -3580,7 +3602,7 @@ var JSONPPolling = /*#__PURE__*/function (_Polling) {
       var isUAgecko = "undefined" !== typeof navigator && /gecko/i.test(navigator.userAgent);
 
       if (isUAgecko) {
-        setTimeout(function () {
+        this.setTimeoutFn(function () {
           var iframe = document.createElement("iframe");
           document.body.appendChild(iframe);
           document.body.removeChild(iframe);
@@ -3673,11 +3695,6 @@ var JSONPPolling = /*#__PURE__*/function (_Polling) {
         this.iframe.onload = complete;
       }
     }
-  }, {
-    key: "supportsBinary",
-    get: function get() {
-      return false;
-    }
   }]);
 
   return JSONPPolling;
@@ -3710,23 +3727,24 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
 /* global attachEvent */
-var XMLHttpRequest = __webpack_require__(/*! ../../contrib/xmlhttprequest-ssl/XMLHttpRequest */ "./node_modules/engine.io-client/lib/xmlhttprequest.js");
+var XMLHttpRequest = __webpack_require__(/*! xmlhttprequest-ssl */ "./node_modules/engine.io-client/lib/xmlhttprequest.js");
 
 var Polling = __webpack_require__(/*! ./polling */ "./node_modules/engine.io-client/lib/transports/polling.js");
 
 var Emitter = __webpack_require__(/*! component-emitter */ "./node_modules/component-emitter/index.js");
 
 var _require = __webpack_require__(/*! ../util */ "./node_modules/engine.io-client/lib/util.js"),
-    pick = _require.pick;
+    pick = _require.pick,
+    installTimerFunctions = _require.installTimerFunctions;
 
 var globalThis = __webpack_require__(/*! ../globalThis */ "./node_modules/engine.io-client/lib/globalThis.browser.js");
 
@@ -3866,6 +3884,7 @@ var Request = /*#__PURE__*/function (_Emitter) {
     _classCallCheck(this, Request);
 
     _this4 = _super2.call(this);
+    installTimerFunctions(_assertThisInitialized(_this4), opts);
     _this4.opts = opts;
     _this4.method = opts.method || "GET";
     _this4.uri = uri;
@@ -3945,7 +3964,7 @@ var Request = /*#__PURE__*/function (_Emitter) {
             } else {
               // make sure the `error` event handler that's user-set
               // does not throw in the same tick and gets caught here
-              setTimeout(function () {
+              _this5.setTimeoutFn(function () {
                 _this5.onError(typeof xhr.status === "number" ? xhr.status : 0);
               }, 0);
             }
@@ -3958,7 +3977,7 @@ var Request = /*#__PURE__*/function (_Emitter) {
         // Need to defer since .create() is called directly from the constructor
         // and thus the 'error' event can only be only bound *after* this exception
         // occurs.  Therefore, also, we cannot throw here at all.
-        setTimeout(function () {
+        this.setTimeoutFn(function () {
           _this5.onError(e);
         }, 0);
         return;
@@ -4131,11 +4150,11 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
@@ -4161,14 +4180,23 @@ var Polling = /*#__PURE__*/function (_Transport) {
   }
 
   _createClass(Polling, [{
-    key: "doOpen",
-
+    key: "name",
+    get:
+    /**
+     * Transport name.
+     */
+    function get() {
+      return "polling";
+    }
     /**
      * Opens the socket (triggers polling). We write a PING message to determine
      * when the transport is open.
      *
      * @api private
      */
+
+  }, {
+    key: "doOpen",
     value: function doOpen() {
       this.poll();
     }
@@ -4361,15 +4389,6 @@ var Polling = /*#__PURE__*/function (_Transport) {
       var ipv6 = this.opts.hostname.indexOf(":") !== -1;
       return schema + "://" + (ipv6 ? "[" + this.opts.hostname + "]" : this.opts.hostname) + port + this.opts.path + query;
     }
-  }, {
-    key: "name",
-
-    /**
-     * Transport name.
-     */
-    get: function get() {
-      return "polling";
-    }
   }]);
 
   return Polling;
@@ -4388,10 +4407,25 @@ module.exports = Polling;
 
 var globalThis = __webpack_require__(/*! ../globalThis */ "./node_modules/engine.io-client/lib/globalThis.browser.js");
 
+var nextTick = function () {
+  var isPromiseAvailable = typeof Promise === "function" && typeof Promise.resolve === "function";
+
+  if (isPromiseAvailable) {
+    return function (cb) {
+      return Promise.resolve().then(cb);
+    };
+  } else {
+    return function (cb, setTimeoutFn) {
+      return setTimeoutFn(cb, 0);
+    };
+  }
+}();
+
 module.exports = {
   WebSocket: globalThis.WebSocket || globalThis.MozWebSocket,
   usingBrowserWebSocket: true,
-  defaultBinaryType: "arraybuffer"
+  defaultBinaryType: "arraybuffer",
+  nextTick: nextTick
 };
 
 /***/ }),
@@ -4417,11 +4451,11 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
@@ -4439,7 +4473,8 @@ var _require = __webpack_require__(/*! ../util */ "./node_modules/engine.io-clie
 var _require2 = __webpack_require__(/*! ./websocket-constructor */ "./node_modules/engine.io-client/lib/transports/websocket-constructor.browser.js"),
     WebSocket = _require2.WebSocket,
     usingBrowserWebSocket = _require2.usingBrowserWebSocket,
-    defaultBinaryType = _require2.defaultBinaryType;
+    defaultBinaryType = _require2.defaultBinaryType,
+    nextTick = _require2.nextTick;
 
 var debug = __webpack_require__(/*! debug */ "./node_modules/debug/src/browser.js")("engine.io-client:websocket"); // detect ReactNative environment
 
@@ -4474,13 +4509,18 @@ var WS = /*#__PURE__*/function (_Transport) {
 
 
   _createClass(WS, [{
-    key: "doOpen",
-
+    key: "name",
+    get: function get() {
+      return "websocket";
+    }
     /**
      * Opens socket.
      *
      * @api private
      */
+
+  }, {
+    key: "doOpen",
     value: function doOpen() {
       if (!this.check()) {
         // let probe timeout
@@ -4587,11 +4627,11 @@ var WS = /*#__PURE__*/function (_Transport) {
           if (lastPacket) {
             // fake drain
             // defer to next tick to allow Socket to clear writeBuffer
-            setTimeout(function () {
+            nextTick(function () {
               _this3.writable = true;
 
               _this3.emit("drain");
-            }, 0);
+            }, _this3.setTimeoutFn);
           }
         });
       };
@@ -4673,11 +4713,6 @@ var WS = /*#__PURE__*/function (_Transport) {
     value: function check() {
       return !!WebSocket && !("__initialize" in WebSocket && this.name === WS.prototype.name);
     }
-  }, {
-    key: "name",
-    get: function get() {
-      return "websocket";
-    }
   }]);
 
   return WS;
@@ -4692,7 +4727,9 @@ module.exports = WS;
   !*** ./node_modules/engine.io-client/lib/util.js ***!
   \***************************************************/
 /*! no static exports found */
-/***/ (function(module, exports) {
+/***/ (function(module, exports, __webpack_require__) {
+
+var globalThis = __webpack_require__(/*! ./globalThis */ "./node_modules/engine.io-client/lib/globalThis.browser.js");
 
 module.exports.pick = function (obj) {
   for (var _len = arguments.length, attr = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
@@ -4706,6 +4743,20 @@ module.exports.pick = function (obj) {
 
     return acc;
   }, {});
+}; // Keep a reference to the real timeout functions so they can be used when overridden
+
+
+var NATIVE_SET_TIMEOUT = setTimeout;
+var NATIVE_CLEAR_TIMEOUT = clearTimeout;
+
+module.exports.installTimerFunctions = function (obj, opts) {
+  if (opts.useNativeTimers) {
+    obj.setTimeoutFn = NATIVE_SET_TIMEOUT.bind(globalThis);
+    obj.clearTimeoutFn = NATIVE_CLEAR_TIMEOUT.bind(globalThis);
+  } else {
+    obj.setTimeoutFn = setTimeout.bind(globalThis);
+    obj.clearTimeoutFn = clearTimeout.bind(globalThis);
+  }
 };
 
 /***/ }),
@@ -5523,11 +5574,11 @@ function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || func
 
 function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
 
-function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
+function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
 
 function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
 
-function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }
+function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
 
 function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
 
@@ -5580,14 +5631,14 @@ var Encoder = /*#__PURE__*/function () {
 
   _createClass(Encoder, [{
     key: "encode",
-
+    value:
     /**
      * Encode a packet as a single string if non-binary, or as a
      * buffer sequence, depending on packet type.
      *
      * @param {Object} obj - packet object
      */
-    value: function encode(obj) {
+    function encode(obj) {
       debug("encoding packet %j", obj);
 
       if (obj.type === PacketType.EVENT || obj.type === PacketType.ACK) {
@@ -5800,11 +5851,11 @@ var Decoder = /*#__PURE__*/function (_Emitter) {
     }
   }, {
     key: "destroy",
-
+    value:
     /**
      * Deallocates a parser's resources
      */
-    value: function destroy() {
+    function destroy() {
       if (this.reconstructor) {
         this.reconstructor.finishedReconstruction();
       }

examples/basic-crud-application/server/package.json

@@ -24,6 +24,7 @@
     "uuid": "^8.3.2"
   },
   "devDependencies": {
+    "@types/mocha": "^8.2.3",
     "@types/chai": "^4.2.16",
     "@types/uuid": "^8.3.0",
     "chai": "^4.3.4",

examples/webpack-build-server/index.js

@@ -0,0 +1,20 @@
+const { Server } = require("socket.io");
+
+const clientFile = require("./node_modules/socket.io/client-dist/socket.io.min?raw");
+const clientMap = require("./node_modules/socket.io/client-dist/socket.io.min.js.map?raw");
+
+Server.sendFile = (filename, req, res) => {
+  res.end(filename.endsWith(".map") ? clientMap : clientFile);
+};
+
+const io = new Server();
+
+io.on("connection", socket => {
+  console.log(`connect ${socket.id}`);
+
+  socket.on("disconnect", (reason) => {
+    console.log(`disconnect ${socket.id} due to ${reason}`);
+  });
+});
+
+io.listen(3000);

examples/webpack-build-server/lib/index.js

@@ -1,15 +0,0 @@
-
-const server = require('http').createServer();
-const io = require('socket.io')(server, {
-  serveClient: false
-});
-const port = process.env.PORT || 3000;
-
-io.on('connect', onConnect);
-server.listen(port, () => console.log('server listening on port ' + port));
-
-function onConnect(socket){
-  console.log('connect ' + socket.id);
-
-  socket.on('disconnect', () => console.log('disconnect ' + socket.id));
-}

examples/webpack-build-server/package.json

@@ -4,13 +4,15 @@
   "description": "A sample Webpack build (for the server)",
   "scripts": {
     "start": "node dist/server.js",
-    "build": "webpack --config ./support/webpack.config.js"
+    "build": "webpack"
   },
   "author": "Damien Arrachequesne",
   "license": "MIT",
   "devDependencies": {
+    "bufferutil": "^4.0.3",
     "socket.io": "^4.0.0",
-    "webpack": "~4.43.0",
-    "webpack-cli": "~3.3.11"
+    "utf-8-validate": "^5.0.5",
+    "webpack": "^5.39.0",
+    "webpack-cli": "^4.7.2"
   }
 }

examples/webpack-build-server/support/webpack.config.js

@@ -1,10 +0,0 @@
-
-module.exports = {
-  entry: './lib/index.js',
-  target: 'node',
-  output: {
-    path: require('path').join(__dirname, '../dist'),
-    filename: 'server.js'
-  },
-  mode: 'production'
-};

examples/webpack-build-server/webpack.config.js

@@ -0,0 +1,19 @@
+const path = require("path");
+
+module.exports = {
+  entry: "./index.js",
+  target: "node",
+  mode: "production",
+  output: {
+    path: path.resolve(__dirname, "dist"),
+    filename: "index.js",
+  },
+  module: {
+    rules: [
+      {
+        resourceQuery: /raw/,
+        type: "asset/source",
+      },
+    ],
+  },
+};

lib/broadcast-operator.ts

@@ -10,7 +10,8 @@ import type {
 } from "./typed-events";
 
 export class BroadcastOperator<EmitEvents extends EventsMap>
-  implements TypedEventBroadcaster<EmitEvents> {
+  implements TypedEventBroadcaster<EmitEvents>
+{
   constructor(
     private readonly adapter: Adapter,
     private readonly rooms: Set<Room> = new Set<Room>(),
@@ -186,7 +187,7 @@ export class BroadcastOperator<EmitEvents extends EventsMap>
         return sockets.map((socket) => {
           if (socket instanceof Socket) {
             // FIXME the TypeScript compiler complains about missing private properties
-            return (socket as unknown) as RemoteSocket<EmitEvents>;
+            return socket as unknown as RemoteSocket<EmitEvents>;
           } else {
             return new RemoteSocket(this.adapter, socket as SocketDetails);
           }
@@ -257,7 +258,8 @@ interface SocketDetails {
  * Expose of subset of the attributes and methods of the Socket class
  */
 export class RemoteSocket<EmitEvents extends EventsMap>
-  implements TypedEventBroadcaster<EmitEvents> {
+  implements TypedEventBroadcaster<EmitEvents>
+{
   public readonly id: SocketId;
   public readonly handshake: Handshake;
   public readonly rooms: Set<Room>;

lib/client.ts

@@ -13,6 +13,7 @@ const debug = debugModule("socket.io:client");
 interface WriteOptions {
   compress?: boolean;
   volatile?: boolean;
+  preEncoded?: boolean;
   wsPreEncoded?: string;
 }
 
@@ -200,12 +201,14 @@ export class Client<
    * @param {Object} opts
    * @private
    */
-  _packet(packet: Packet, opts: WriteOptions = {}): void {
+  _packet(packet: Packet | any[], opts: WriteOptions = {}): void {
     if (this.conn.readyState !== "open") {
       debug("ignoring packet write %j", packet);
       return;
     }
-    const encodedPackets = this.encoder.encode(packet);
+    const encodedPackets = opts.preEncoded
+      ? (packet as any[]) // previous versions of the adapter incorrectly used socket.packet() instead of writeToEngine()
+      : this.encoder.encode(packet as Packet);
     for (const encodedPacket of encodedPackets) {
       this.writeToEngine(encodedPacket, opts);
     }

lib/index.ts

@@ -201,10 +201,8 @@ export class Server<
   /**
    * @private
    */
-  _nsps: Map<
-    string,
-    Namespace<ListenEvents, EmitEvents, ServerSideEvents>
-  > = new Map();
+  _nsps: Map<string, Namespace<ListenEvents, EmitEvents, ServerSideEvents>> =
+    new Map();
   private parentNsps: Map<
     ParentNspNameMatchFn,
     ParentNamespace<ListenEvents, EmitEvents, ServerSideEvents>
@@ -336,7 +334,7 @@ export class Server<
     this.clientPathRegex = new RegExp(
       "^" +
         escapedPath +
-        "/socket\\.io(\\.min|\\.msgpack\\.min)?\\.js(\\.map)?$"
+        "/socket\\.io(\\.min|\\.msgpack\\.min)?\\.js(\\.map)?(?:\\?|$)"
     );
     return this;
   }
@@ -471,7 +469,7 @@ export class Server<
     const evs = srv.listeners("request").slice(0);
     srv.removeAllListeners("request");
     srv.on("request", (req, res) => {
-      if (this.clientPathRegex.test(req.url)) {
+      if (this.clientPathRegex.test(req.url!)) {
         this.serve(req, res);
       } else {
         for (let i = 0; i < evs.length; i++) {
@@ -489,7 +487,7 @@ export class Server<
    * @private
    */
   private serve(req: http.IncomingMessage, res: http.ServerResponse): void {
-    const filename = req.url!.replace(this._path, "");
+    const filename = req.url!.replace(this._path, "").replace(/\?.*$/, "");
     const isMap = dotMapRegex.test(filename);
     const type = isMap ? "map" : "source";
 
@@ -517,9 +515,6 @@ export class Server<
     );
     res.setHeader("ETag", expectedEtag);
 
-    if (!isMap) {
-      res.setHeader("X-SourceMap", filename.substring(1) + ".map");
-    }
     Server.sendFile(filename, req, res);
   }
 
@@ -705,11 +700,8 @@ export class Server<
    * @return self
    * @public
    */
-  public except(
-    name: Room | Room[]
-  ): Server<ListenEvents, EmitEvents, ServerSideEvents> {
-    this.sockets.except(name);
-    return this;
+  public except(name: Room | Room[]): BroadcastOperator<EmitEvents> {
+    return this.sockets.except(name);
   }
 
   /**

lib/namespace.ts

@@ -307,7 +307,7 @@ export class Namespace<
    *
    * @private
    */
-  _onServerSideEmit(args: [eventName: string, ...args: any[]]) {
+  _onServerSideEmit(args: [string, ...any[]]) {
     super.emitUntyped.apply(this, args);
   }
 

lib/parent-namespace.ts

@@ -14,9 +14,8 @@ export class ParentNamespace<
   ServerSideEvents extends EventsMap = DefaultEventsMap
 > extends Namespace<ListenEvents, EmitEvents, ServerSideEvents> {
   private static count: number = 0;
-  private children: Set<
-    Namespace<ListenEvents, EmitEvents, ServerSideEvents>
-  > = new Set();
+  private children: Set<Namespace<ListenEvents, EmitEvents, ServerSideEvents>> =
+    new Set();
 
   constructor(server: Server<ListenEvents, EmitEvents, ServerSideEvents>) {
     super(server, "/_" + ParentNamespace.count++);

lib/socket.ts

@@ -130,9 +130,8 @@ export class Socket<
   private readonly server: Server<ListenEvents, EmitEvents, ServerSideEvents>;
   private readonly adapter: Adapter;
   private acks: Map<number, () => void> = new Map();
-  private fns: Array<
-    (event: Array<any>, next: (err?: Error) => void) => void
-  > = [];
+  private fns: Array<(event: Array<any>, next: (err?: Error) => void) => void> =
+    [];
   private flags: BroadcastFlags = {};
   private _anyListeners?: Array<(...args: any[]) => void>;
 

lib/typed-events.ts

@@ -58,7 +58,7 @@ export type ReservedOrUserListener<
  * Needed because of https://github.com/microsoft/TypeScript/issues/41778
  */
 type FallbackToUntypedListener<T> = [T] extends [never]
-  ? (...args: any[]) => void
+  ? (...args: any[]) => void | Promise<void>
   : T;
 
 /**
@@ -91,7 +91,8 @@ export abstract class StrictEventEmitter<
     ReservedEvents extends EventsMap = {}
   >
   extends EventEmitter
-  implements TypedEventBroadcaster<EmitEvents> {
+  implements TypedEventBroadcaster<EmitEvents>
+{
   /**
    * Adds the `listener` function as an event listener for `ev`.
    *

package.json

@@ -1,6 +1,6 @@
 {
   "name": "socket.io",
-  "version": "4.1.1",
+  "version": "4.2.0",
   "description": "node.js realtime framework server",
   "keywords": [
     "realtime",
@@ -45,33 +45,30 @@
     "prepack": "npm run compile"
   },
   "dependencies": {
-    "@types/cookie": "^0.4.0",
-    "@types/cors": "^2.8.8",
+    "@types/cookie": "^0.4.1",
+    "@types/cors": "^2.8.12",
     "@types/node": ">=10.0.0",
     "accepts": "~1.3.4",
     "base64id": "~2.0.0",
-    "debug": "~4.3.1",
-    "engine.io": "~5.1.0",
-    "socket.io-adapter": "~2.3.0",
-    "socket.io-parser": "~4.0.3"
+    "debug": "~4.3.2",
+    "engine.io": "~5.2.0",
+    "socket.io-adapter": "~2.3.2",
+    "socket.io-parser": "~4.0.4"
   },
   "devDependencies": {
-    "@types/mocha": "^8.0.4",
-    "babel-eslint": "^10.1.0",
-    "eslint": "^7.14.0",
-    "eslint-config-prettier": "^6.11.0",
+    "@types/mocha": "^9.0.0",
     "expect.js": "0.3.1",
     "mocha": "^3.5.3",
     "nyc": "^15.1.0",
-    "prettier": "^2.2.0",
+    "prettier": "^2.3.2",
     "rimraf": "^3.0.2",
-    "socket.io-client": "4.1.1",
+    "socket.io-client": "4.2.0",
     "socket.io-client-v2": "npm:socket.io-client@^2.4.0",
     "superagent": "^6.1.0",
-    "supertest": "^6.0.1",
-    "ts-node": "^9.0.0",
-    "tsd": "^0.14.0",
-    "typescript": "^4.1.2"
+    "supertest": "^6.1.6",
+    "ts-node": "^10.2.1",
+    "tsd": "^0.17.0",
+    "typescript": "^4.4.2"
   },
   "contributors": [
     {

test/socket.io.ts

@@ -59,7 +59,7 @@ describe("socket.io", () => {
             if (err) return done(err);
             expect(res.headers["content-type"]).to.be("application/javascript");
             expect(res.headers.etag).to.be('"' + clientVersion + '"');
-            expect(res.headers["x-sourcemap"]).to.be(filename + ".map");
+            expect(res.headers["x-sourcemap"]).to.be(undefined);
             expect(res.text).to.match(/engine\.io/);
             expect(res.status).to.be(200);
             done();
@@ -83,6 +83,10 @@ describe("socket.io", () => {
       };
 
       it("should serve client", testSource("socket.io.js"));
+      it(
+        "should serve client with query string",
+        testSource("socket.io.js?buster=" + Date.now())
+      );
       it("should serve source map", testSourceMap("socket.io.js.map"));
       it("should serve client (min)", testSource("socket.io.min.js"));
 
@@ -836,6 +840,27 @@ describe("socket.io", () => {
     });
 
     it("should exclude a specific socket when emitting", (done) => {
+      const srv = createServer();
+      const io = new Server(srv);
+
+      srv.listen(() => {
+        const socket1 = client(srv, "/");
+        const socket2 = client(srv, "/");
+
+        socket2.on("a", () => {
+          done(new Error("should not happen"));
+        });
+        socket1.on("a", () => {
+          done();
+        });
+
+        socket2.on("connect", () => {
+          io.except(socket2.id).emit("a");
+        });
+      });
+    });
+
+    it("should exclude a specific socket when emitting (in a namespace)", (done) => {
       const srv = createServer();
       const sio = new Server(srv);