npm events, expose EventEmitter via bundle

package-lock.json

@@ -13,6 +13,7 @@
                 "bowser": "^2.11.0",
                 "css-tree": "^2.0.4",
                 "esotope-hammerhead": "^0.6.1",
+                "events": "^3.3.0",
                 "idb": "^7.0.0",
                 "meriyah": "^4.2.0",
                 "mime-db": "^1.51.0",
@@ -1167,7 +1168,6 @@
             "version": "3.3.0",
             "resolved": "https://registry.npmjs.org/events/-/events-3.3.0.tgz",
             "integrity": "sha512-mQw+2fkQbALzQ7V0MY0IqdnXNOeTtP4r0lN9z7AAawCXgqea7bDii20AYrIBrFd/Hx0M2Ocz6S111CaFkUcb0Q==",
-            "dev": true,
             "engines": {
                 "node": ">=0.8.x"
             }
@@ -3580,8 +3580,7 @@
         "events": {
             "version": "3.3.0",
             "resolved": "https://registry.npmjs.org/events/-/events-3.3.0.tgz",
-            "integrity": "sha512-mQw+2fkQbALzQ7V0MY0IqdnXNOeTtP4r0lN9z7AAawCXgqea7bDii20AYrIBrFd/Hx0M2Ocz6S111CaFkUcb0Q==",
+            "integrity": "sha512-mQw+2fkQbALzQ7V0MY0IqdnXNOeTtP4r0lN9z7AAawCXgqea7bDii20AYrIBrFd/Hx0M2Ocz6S111CaFkUcb0Q=="
-            "dev": true
         },
         "fast-deep-equal": {
             "version": "3.1.3",

package.json

@@ -23,6 +23,7 @@
         "bowser": "^2.11.0",
         "css-tree": "^2.0.4",
         "esotope-hammerhead": "^0.6.1",
+        "events": "^3.3.0",
         "idb": "^7.0.0",
         "meriyah": "^4.2.0",
         "mime-db": "^1.51.0",

src/client/dom/attr.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class AttrApi extends EventEmitter {

src/client/dom/document.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class DocumentHook extends EventEmitter {

src/client/dom/element.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class ElementApi extends EventEmitter {

src/client/dom/node.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class NodeApi extends EventEmitter {

src/client/dom/style.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class StyleApi extends EventEmitter {

src/client/events.js

@@ -1,522 +0,0 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-'use strict';
-
-var R = typeof Reflect === 'object' ? Reflect : null;
-var ReflectApply =
-    R && typeof R.apply === 'function'
-        ? R.apply
-        : function ReflectApply(target, receiver, args) {
-              return Function.prototype.apply.call(target, receiver, args);
-          };
-
-var ReflectOwnKeys;
-if (R && typeof R.ownKeys === 'function') {
-    ReflectOwnKeys = R.ownKeys;
-} else if (Object.getOwnPropertySymbols) {
-    ReflectOwnKeys = function ReflectOwnKeys(target) {
-        return Object.getOwnPropertyNames(target).concat(
-            Object.getOwnPropertySymbols(target)
-        );
-    };
-} else {
-    ReflectOwnKeys = function ReflectOwnKeys(target) {
-        return Object.getOwnPropertyNames(target);
-    };
-}
-
-function ProcessEmitWarning(warning) {
-    if (console && console.warn) console.warn(warning);
-}
-
-var NumberIsNaN =
-    Number.isNaN ||
-    function NumberIsNaN(value) {
-        return value !== value;
-    };
-
-function EventEmitter() {
-    EventEmitter.init.call(this);
-}
-
-export default EventEmitter;
-
-// Backwards-compat with node 0.10.x
-EventEmitter.EventEmitter = EventEmitter;
-
-EventEmitter.prototype._events = undefined;
-EventEmitter.prototype._eventsCount = 0;
-EventEmitter.prototype._maxListeners = undefined;
-
-// By default EventEmitters will print a warning if more than 10 listeners are
-// added to it. This is a useful default which helps finding memory leaks.
-var defaultMaxListeners = 10;
-
-function checkListener(listener) {
-    if (typeof listener !== 'function') {
-        throw new TypeError(
-            'The "listener" argument must be of type Function. Received type ' +
-                typeof listener
-        );
-    }
-}
-
-Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
-    enumerable: true,
-    get: function () {
-        return defaultMaxListeners;
-    },
-    set: function (arg) {
-        if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {
-            throw new RangeError(
-                'The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' +
-                    arg +
-                    '.'
-            );
-        }
-        defaultMaxListeners = arg;
-    },
-});
-
-EventEmitter.init = function () {
-    if (
-        this._events === undefined ||
-        this._events === Object.getPrototypeOf(this)._events
-    ) {
-        this._events = Object.create(null);
-        this._eventsCount = 0;
-    }
-
-    this._maxListeners = this._maxListeners || undefined;
-};
-
-// Obviously not all Emitters should be limited to 10. This function allows
-// that to be increased. Set to zero for unlimited.
-EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
-    if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {
-        throw new RangeError(
-            'The value of "n" is out of range. It must be a non-negative number. Received ' +
-                n +
-                '.'
-        );
-    }
-    this._maxListeners = n;
-    return this;
-};
-
-function _getMaxListeners(that) {
-    if (that._maxListeners === undefined)
-        return EventEmitter.defaultMaxListeners;
-    return that._maxListeners;
-}
-
-EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
-    return _getMaxListeners(this);
-};
-
-EventEmitter.prototype.emit = function emit(type) {
-    var args = [];
-    for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);
-    var doError = type === 'error';
-
-    var events = this._events;
-    if (events !== undefined) doError = doError && events.error === undefined;
-    else if (!doError) return false;
-
-    // If there is no 'error' event listener then throw.
-    if (doError) {
-        var er;
-        if (args.length > 0) er = args[0];
-        if (er instanceof Error) {
-            // Note: The comments on the `throw` lines are intentional, they show
-            // up in Node's output if this results in an unhandled exception.
-            throw er; // Unhandled 'error' event
-        }
-        // At least give some kind of context to the user
-        var err = new Error(
-            'Unhandled error.' + (er ? ' (' + er.message + ')' : '')
-        );
-        err.context = er;
-        throw err; // Unhandled 'error' event
-    }
-
-    var handler = events[type];
-
-    if (handler === undefined) return false;
-
-    if (typeof handler === 'function') {
-        ReflectApply(handler, this, args);
-    } else {
-        var len = handler.length;
-        var listeners = arrayClone(handler, len);
-        for (var i = 0; i < len; ++i) ReflectApply(listeners[i], this, args);
-    }
-
-    return true;
-};
-
-function _addListener(target, type, listener, prepend) {
-    var m;
-    var events;
-    var existing;
-
-    checkListener(listener);
-
-    events = target._events;
-    if (events === undefined) {
-        events = target._events = Object.create(null);
-        target._eventsCount = 0;
-    } else {
-        // To avoid recursion in the case that type === "newListener"! Before
-        // adding it to the listeners, first emit "newListener".
-        if (events.newListener !== undefined) {
-            target.emit(
-                'newListener',
-                type,
-                listener.listener ? listener.listener : listener
-            );
-
-            // Re-assign `events` because a newListener handler could have caused the
-            // this._events to be assigned to a new object
-            events = target._events;
-        }
-        existing = events[type];
-    }
-
-    if (existing === undefined) {
-        // Optimize the case of one listener. Don't need the extra array object.
-        existing = events[type] = listener;
-        ++target._eventsCount;
-    } else {
-        if (typeof existing === 'function') {
-            // Adding the second element, need to change to array.
-            existing = events[type] = prepend
-                ? [listener, existing]
-                : [existing, listener];
-            // If we've already got an array, just append.
-        } else if (prepend) {
-            existing.unshift(listener);
-        } else {
-            existing.push(listener);
-        }
-
-        // Check for listener leak
-        m = _getMaxListeners(target);
-        if (m > 0 && existing.length > m && !existing.warned) {
-            existing.warned = true;
-            // No error code for this since it is a Warning
-            // eslint-disable-next-line no-restricted-syntax
-            var w = new Error(
-                'Possible EventEmitter memory leak detected. ' +
-                    existing.length +
-                    ' ' +
-                    String(type) +
-                    ' listeners ' +
-                    'added. Use emitter.setMaxListeners() to ' +
-                    'increase limit'
-            );
-            w.name = 'MaxListenersExceededWarning';
-            w.emitter = target;
-            w.type = type;
-            w.count = existing.length;
-            ProcessEmitWarning(w);
-        }
-    }
-
-    return target;
-}
-
-EventEmitter.prototype.addListener = function addListener(type, listener) {
-    return _addListener(this, type, listener, false);
-};
-
-EventEmitter.prototype.on = EventEmitter.prototype.addListener;
-
-EventEmitter.prototype.prependListener = function prependListener(
-    type,
-    listener
-) {
-    return _addListener(this, type, listener, true);
-};
-
-function onceWrapper() {
-    if (!this.fired) {
-        this.target.removeListener(this.type, this.wrapFn);
-        this.fired = true;
-        if (arguments.length === 0) return this.listener.call(this.target);
-        return this.listener.apply(this.target, arguments);
-    }
-}
-
-function _onceWrap(target, type, listener) {
-    var state = {
-        fired: false,
-        wrapFn: undefined,
-        target: target,
-        type: type,
-        listener: listener,
-    };
-    var wrapped = onceWrapper.bind(state);
-    wrapped.listener = listener;
-    state.wrapFn = wrapped;
-    return wrapped;
-}
-
-EventEmitter.prototype.once = function once(type, listener) {
-    checkListener(listener);
-    this.on(type, _onceWrap(this, type, listener));
-    return this;
-};
-
-EventEmitter.prototype.prependOnceListener = function prependOnceListener(
-    type,
-    listener
-) {
-    checkListener(listener);
-    this.prependListener(type, _onceWrap(this, type, listener));
-    return this;
-};
-
-// Emits a 'removeListener' event if and only if the listener was removed.
-EventEmitter.prototype.removeListener = function removeListener(
-    type,
-    listener
-) {
-    var list, events, position, i, originalListener;
-
-    checkListener(listener);
-
-    events = this._events;
-    if (events === undefined) return this;
-
-    list = events[type];
-    if (list === undefined) return this;
-
-    if (list === listener || list.listener === listener) {
-        if (--this._eventsCount === 0) this._events = Object.create(null);
-        else {
-            delete events[type];
-            if (events.removeListener)
-                this.emit('removeListener', type, list.listener || listener);
-        }
-    } else if (typeof list !== 'function') {
-        position = -1;
-
-        for (i = list.length - 1; i >= 0; i--) {
-            if (list[i] === listener || list[i].listener === listener) {
-                originalListener = list[i].listener;
-                position = i;
-                break;
-            }
-        }
-
-        if (position < 0) return this;
-
-        if (position === 0) list.shift();
-        else {
-            spliceOne(list, position);
-        }
-
-        if (list.length === 1) events[type] = list[0];
-
-        if (events.removeListener !== undefined)
-            this.emit('removeListener', type, originalListener || listener);
-    }
-
-    return this;
-};
-
-EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
-
-EventEmitter.prototype.removeAllListeners = function removeAllListeners(type) {
-    var listeners, events, i;
-
-    events = this._events;
-    if (events === undefined) return this;
-
-    // not listening for removeListener, no need to emit
-    if (events.removeListener === undefined) {
-        if (arguments.length === 0) {
-            this._events = Object.create(null);
-            this._eventsCount = 0;
-        } else if (events[type] !== undefined) {
-            if (--this._eventsCount === 0) this._events = Object.create(null);
-            else delete events[type];
-        }
-        return this;
-    }
-
-    // emit removeListener for all listeners on all events
-    if (arguments.length === 0) {
-        var keys = Object.keys(events);
-        var key;
-        for (i = 0; i < keys.length; ++i) {
-            key = keys[i];
-            if (key === 'removeListener') continue;
-            this.removeAllListeners(key);
-        }
-        this.removeAllListeners('removeListener');
-        this._events = Object.create(null);
-        this._eventsCount = 0;
-        return this;
-    }
-
-    listeners = events[type];
-
-    if (typeof listeners === 'function') {
-        this.removeListener(type, listeners);
-    } else if (listeners !== undefined) {
-        // LIFO order
-        for (i = listeners.length - 1; i >= 0; i--) {
-            this.removeListener(type, listeners[i]);
-        }
-    }
-
-    return this;
-};
-
-function _listeners(target, type, unwrap) {
-    var events = target._events;
-
-    if (events === undefined) return [];
-
-    var evlistener = events[type];
-    if (evlistener === undefined) return [];
-
-    if (typeof evlistener === 'function')
-        return unwrap ? [evlistener.listener || evlistener] : [evlistener];
-
-    return unwrap
-        ? unwrapListeners(evlistener)
-        : arrayClone(evlistener, evlistener.length);
-}
-
-EventEmitter.prototype.listeners = function listeners(type) {
-    return _listeners(this, type, true);
-};
-
-EventEmitter.prototype.rawListeners = function rawListeners(type) {
-    return _listeners(this, type, false);
-};
-
-EventEmitter.listenerCount = function (emitter, type) {
-    if (typeof emitter.listenerCount === 'function') {
-        return emitter.listenerCount(type);
-    } else {
-        return listenerCount.call(emitter, type);
-    }
-};
-
-EventEmitter.prototype.listenerCount = listenerCount;
-function listenerCount(type) {
-    var events = this._events;
-
-    if (events !== undefined) {
-        var evlistener = events[type];
-
-        if (typeof evlistener === 'function') {
-            return 1;
-        } else if (evlistener !== undefined) {
-            return evlistener.length;
-        }
-    }
-
-    return 0;
-}
-
-EventEmitter.prototype.eventNames = function eventNames() {
-    return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
-};
-
-function arrayClone(arr, n) {
-    var copy = new Array(n);
-    for (var i = 0; i < n; ++i) copy[i] = arr[i];
-    return copy;
-}
-
-function spliceOne(list, index) {
-    for (; index + 1 < list.length; index++) list[index] = list[index + 1];
-    list.pop();
-}
-
-function unwrapListeners(arr) {
-    var ret = new Array(arr.length);
-    for (var i = 0; i < ret.length; ++i) {
-        ret[i] = arr[i].listener || arr[i];
-    }
-    return ret;
-}
-
-function once(emitter, name) {
-    return new Promise(function (resolve, reject) {
-        function errorListener(err) {
-            emitter.removeListener(name, resolver);
-            reject(err);
-        }
-
-        function resolver() {
-            if (typeof emitter.removeListener === 'function') {
-                emitter.removeListener('error', errorListener);
-            }
-            resolve([].slice.call(arguments));
-        }
-
-        eventTargetAgnosticAddListener(emitter, name, resolver, { once: true });
-        if (name !== 'error') {
-            addErrorHandlerIfEventEmitter(emitter, errorListener, {
-                once: true,
-            });
-        }
-    });
-}
-
-function addErrorHandlerIfEventEmitter(emitter, handler, flags) {
-    if (typeof emitter.on === 'function') {
-        eventTargetAgnosticAddListener(emitter, 'error', handler, flags);
-    }
-}
-
-function eventTargetAgnosticAddListener(emitter, name, listener, flags) {
-    if (typeof emitter.on === 'function') {
-        if (flags.once) {
-            emitter.once(name, listener);
-        } else {
-            emitter.on(name, listener);
-        }
-    } else if (typeof emitter.addEventListener === 'function') {
-        // EventTarget does not have `error` event semantics like Node
-        // EventEmitters, we do not listen for `error` events here.
-        emitter.addEventListener(name, function wrapListener(arg) {
-            // IE does not have builtin `{ once: true }` support so we
-            // have to do it manually.
-            if (flags.once) {
-                emitter.removeEventListener(name, wrapListener);
-            }
-            listener(arg);
-        });
-    } else {
-        throw new TypeError(
-            'The "emitter" argument must be of type EventEmitter. Received type ' +
-                typeof emitter
-        );
-    }
-}

src/client/history.js

@@ -1,4 +1,4 @@
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 import HookEvent from './hook.js';
 
 class History extends EventEmitter {

src/client/index.js

@@ -13,7 +13,7 @@ import MessageApi from './message.js';
 import NavigatorApi from './navigator.js';
 import Workers from './worker.js';
 import URLApi from './url.js';
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 import StorageApi from './storage.js';
 import StyleApi from './dom/style.js';
 

src/client/location.js

@@ -1,4 +1,4 @@
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 
 class LocationApi extends EventEmitter {
     constructor(ctx) {

src/client/message.js

@@ -1,4 +1,4 @@
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 import HookEvent from './hook.js';
 
 class MessageApi extends EventEmitter {

src/client/native/function.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class FunctionHook extends EventEmitter {

src/client/native/object.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class ObjectHook extends EventEmitter {

src/client/navigator.js

@@ -1,4 +1,4 @@
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 import HookEvent from './hook.js';
 
 class NavigatorApi extends EventEmitter {

src/client/requests/eventsource.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class EventSourceApi extends EventEmitter {

src/client/requests/fetch.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class Fetch extends EventEmitter {

src/client/requests/xhr.js

@@ -1,4 +1,4 @@
-import EventEmitter from '../events.js';
+import EventEmitter from 'events';
 import HookEvent from '../hook.js';
 
 class Xhr extends EventEmitter {

src/client/storage.js

@@ -1,4 +1,4 @@
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 import HookEvent from './hook.js';
 
 class StorageApi extends EventEmitter {

src/client/url.js

@@ -1,4 +1,4 @@
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 import HookEvent from './hook.js';
 
 class URLApi extends EventEmitter {

src/client/worker.js

@@ -1,4 +1,4 @@
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 import HookEvent from './hook.js';
 
 class Workers extends EventEmitter {

src/rewrite/css.js

@@ -1,5 +1,5 @@
 import { parse, walk, generate } from 'css-tree';
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 import parsel from './parsel.js';
 
 class CSS extends EventEmitter {

src/rewrite/events.js

@@ -1,522 +0,0 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-'use strict';
-
-var R = typeof Reflect === 'object' ? Reflect : null;
-var ReflectApply =
-    R && typeof R.apply === 'function'
-        ? R.apply
-        : function ReflectApply(target, receiver, args) {
-              return Function.prototype.apply.call(target, receiver, args);
-          };
-
-var ReflectOwnKeys;
-if (R && typeof R.ownKeys === 'function') {
-    ReflectOwnKeys = R.ownKeys;
-} else if (Object.getOwnPropertySymbols) {
-    ReflectOwnKeys = function ReflectOwnKeys(target) {
-        return Object.getOwnPropertyNames(target).concat(
-            Object.getOwnPropertySymbols(target)
-        );
-    };
-} else {
-    ReflectOwnKeys = function ReflectOwnKeys(target) {
-        return Object.getOwnPropertyNames(target);
-    };
-}
-
-function ProcessEmitWarning(warning) {
-    if (console && console.warn) console.warn(warning);
-}
-
-var NumberIsNaN =
-    Number.isNaN ||
-    function NumberIsNaN(value) {
-        return value !== value;
-    };
-
-function EventEmitter() {
-    EventEmitter.init.call(this);
-}
-
-export default EventEmitter;
-
-// Backwards-compat with node 0.10.x
-EventEmitter.EventEmitter = EventEmitter;
-
-EventEmitter.prototype._events = undefined;
-EventEmitter.prototype._eventsCount = 0;
-EventEmitter.prototype._maxListeners = undefined;
-
-// By default EventEmitters will print a warning if more than 10 listeners are
-// added to it. This is a useful default which helps finding memory leaks.
-var defaultMaxListeners = 10;
-
-function checkListener(listener) {
-    if (typeof listener !== 'function') {
-        throw new TypeError(
-            'The "listener" argument must be of type Function. Received type ' +
-                typeof listener
-        );
-    }
-}
-
-Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
-    enumerable: true,
-    get: function () {
-        return defaultMaxListeners;
-    },
-    set: function (arg) {
-        if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {
-            throw new RangeError(
-                'The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' +
-                    arg +
-                    '.'
-            );
-        }
-        defaultMaxListeners = arg;
-    },
-});
-
-EventEmitter.init = function () {
-    if (
-        this._events === undefined ||
-        this._events === Object.getPrototypeOf(this)._events
-    ) {
-        this._events = Object.create(null);
-        this._eventsCount = 0;
-    }
-
-    this._maxListeners = this._maxListeners || undefined;
-};
-
-// Obviously not all Emitters should be limited to 10. This function allows
-// that to be increased. Set to zero for unlimited.
-EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
-    if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {
-        throw new RangeError(
-            'The value of "n" is out of range. It must be a non-negative number. Received ' +
-                n +
-                '.'
-        );
-    }
-    this._maxListeners = n;
-    return this;
-};
-
-function _getMaxListeners(that) {
-    if (that._maxListeners === undefined)
-        return EventEmitter.defaultMaxListeners;
-    return that._maxListeners;
-}
-
-EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
-    return _getMaxListeners(this);
-};
-
-EventEmitter.prototype.emit = function emit(type) {
-    var args = [];
-    for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);
-    var doError = type === 'error';
-
-    var events = this._events;
-    if (events !== undefined) doError = doError && events.error === undefined;
-    else if (!doError) return false;
-
-    // If there is no 'error' event listener then throw.
-    if (doError) {
-        var er;
-        if (args.length > 0) er = args[0];
-        if (er instanceof Error) {
-            // Note: The comments on the `throw` lines are intentional, they show
-            // up in Node's output if this results in an unhandled exception.
-            throw er; // Unhandled 'error' event
-        }
-        // At least give some kind of context to the user
-        var err = new Error(
-            'Unhandled error.' + (er ? ' (' + er.message + ')' : '')
-        );
-        err.context = er;
-        throw err; // Unhandled 'error' event
-    }
-
-    var handler = events[type];
-
-    if (handler === undefined) return false;
-
-    if (typeof handler === 'function') {
-        ReflectApply(handler, this, args);
-    } else {
-        var len = handler.length;
-        var listeners = arrayClone(handler, len);
-        for (var i = 0; i < len; ++i) ReflectApply(listeners[i], this, args);
-    }
-
-    return true;
-};
-
-function _addListener(target, type, listener, prepend) {
-    var m;
-    var events;
-    var existing;
-
-    checkListener(listener);
-
-    events = target._events;
-    if (events === undefined) {
-        events = target._events = Object.create(null);
-        target._eventsCount = 0;
-    } else {
-        // To avoid recursion in the case that type === "newListener"! Before
-        // adding it to the listeners, first emit "newListener".
-        if (events.newListener !== undefined) {
-            target.emit(
-                'newListener',
-                type,
-                listener.listener ? listener.listener : listener
-            );
-
-            // Re-assign `events` because a newListener handler could have caused the
-            // this._events to be assigned to a new object
-            events = target._events;
-        }
-        existing = events[type];
-    }
-
-    if (existing === undefined) {
-        // Optimize the case of one listener. Don't need the extra array object.
-        existing = events[type] = listener;
-        ++target._eventsCount;
-    } else {
-        if (typeof existing === 'function') {
-            // Adding the second element, need to change to array.
-            existing = events[type] = prepend
-                ? [listener, existing]
-                : [existing, listener];
-            // If we've already got an array, just append.
-        } else if (prepend) {
-            existing.unshift(listener);
-        } else {
-            existing.push(listener);
-        }
-
-        // Check for listener leak
-        m = _getMaxListeners(target);
-        if (m > 0 && existing.length > m && !existing.warned) {
-            existing.warned = true;
-            // No error code for this since it is a Warning
-            // eslint-disable-next-line no-restricted-syntax
-            var w = new Error(
-                'Possible EventEmitter memory leak detected. ' +
-                    existing.length +
-                    ' ' +
-                    String(type) +
-                    ' listeners ' +
-                    'added. Use emitter.setMaxListeners() to ' +
-                    'increase limit'
-            );
-            w.name = 'MaxListenersExceededWarning';
-            w.emitter = target;
-            w.type = type;
-            w.count = existing.length;
-            ProcessEmitWarning(w);
-        }
-    }
-
-    return target;
-}
-
-EventEmitter.prototype.addListener = function addListener(type, listener) {
-    return _addListener(this, type, listener, false);
-};
-
-EventEmitter.prototype.on = EventEmitter.prototype.addListener;
-
-EventEmitter.prototype.prependListener = function prependListener(
-    type,
-    listener
-) {
-    return _addListener(this, type, listener, true);
-};
-
-function onceWrapper() {
-    if (!this.fired) {
-        this.target.removeListener(this.type, this.wrapFn);
-        this.fired = true;
-        if (arguments.length === 0) return this.listener.call(this.target);
-        return this.listener.apply(this.target, arguments);
-    }
-}
-
-function _onceWrap(target, type, listener) {
-    var state = {
-        fired: false,
-        wrapFn: undefined,
-        target: target,
-        type: type,
-        listener: listener,
-    };
-    var wrapped = onceWrapper.bind(state);
-    wrapped.listener = listener;
-    state.wrapFn = wrapped;
-    return wrapped;
-}
-
-EventEmitter.prototype.once = function once(type, listener) {
-    checkListener(listener);
-    this.on(type, _onceWrap(this, type, listener));
-    return this;
-};
-
-EventEmitter.prototype.prependOnceListener = function prependOnceListener(
-    type,
-    listener
-) {
-    checkListener(listener);
-    this.prependListener(type, _onceWrap(this, type, listener));
-    return this;
-};
-
-// Emits a 'removeListener' event if and only if the listener was removed.
-EventEmitter.prototype.removeListener = function removeListener(
-    type,
-    listener
-) {
-    var list, events, position, i, originalListener;
-
-    checkListener(listener);
-
-    events = this._events;
-    if (events === undefined) return this;
-
-    list = events[type];
-    if (list === undefined) return this;
-
-    if (list === listener || list.listener === listener) {
-        if (--this._eventsCount === 0) this._events = Object.create(null);
-        else {
-            delete events[type];
-            if (events.removeListener)
-                this.emit('removeListener', type, list.listener || listener);
-        }
-    } else if (typeof list !== 'function') {
-        position = -1;
-
-        for (i = list.length - 1; i >= 0; i--) {
-            if (list[i] === listener || list[i].listener === listener) {
-                originalListener = list[i].listener;
-                position = i;
-                break;
-            }
-        }
-
-        if (position < 0) return this;
-
-        if (position === 0) list.shift();
-        else {
-            spliceOne(list, position);
-        }
-
-        if (list.length === 1) events[type] = list[0];
-
-        if (events.removeListener !== undefined)
-            this.emit('removeListener', type, originalListener || listener);
-    }
-
-    return this;
-};
-
-EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
-
-EventEmitter.prototype.removeAllListeners = function removeAllListeners(type) {
-    var listeners, events, i;
-
-    events = this._events;
-    if (events === undefined) return this;
-
-    // not listening for removeListener, no need to emit
-    if (events.removeListener === undefined) {
-        if (arguments.length === 0) {
-            this._events = Object.create(null);
-            this._eventsCount = 0;
-        } else if (events[type] !== undefined) {
-            if (--this._eventsCount === 0) this._events = Object.create(null);
-            else delete events[type];
-        }
-        return this;
-    }
-
-    // emit removeListener for all listeners on all events
-    if (arguments.length === 0) {
-        var keys = Object.keys(events);
-        var key;
-        for (i = 0; i < keys.length; ++i) {
-            key = keys[i];
-            if (key === 'removeListener') continue;
-            this.removeAllListeners(key);
-        }
-        this.removeAllListeners('removeListener');
-        this._events = Object.create(null);
-        this._eventsCount = 0;
-        return this;
-    }
-
-    listeners = events[type];
-
-    if (typeof listeners === 'function') {
-        this.removeListener(type, listeners);
-    } else if (listeners !== undefined) {
-        // LIFO order
-        for (i = listeners.length - 1; i >= 0; i--) {
-            this.removeListener(type, listeners[i]);
-        }
-    }
-
-    return this;
-};
-
-function _listeners(target, type, unwrap) {
-    var events = target._events;
-
-    if (events === undefined) return [];
-
-    var evlistener = events[type];
-    if (evlistener === undefined) return [];
-
-    if (typeof evlistener === 'function')
-        return unwrap ? [evlistener.listener || evlistener] : [evlistener];
-
-    return unwrap
-        ? unwrapListeners(evlistener)
-        : arrayClone(evlistener, evlistener.length);
-}
-
-EventEmitter.prototype.listeners = function listeners(type) {
-    return _listeners(this, type, true);
-};
-
-EventEmitter.prototype.rawListeners = function rawListeners(type) {
-    return _listeners(this, type, false);
-};
-
-EventEmitter.listenerCount = function (emitter, type) {
-    if (typeof emitter.listenerCount === 'function') {
-        return emitter.listenerCount(type);
-    } else {
-        return listenerCount.call(emitter, type);
-    }
-};
-
-EventEmitter.prototype.listenerCount = listenerCount;
-function listenerCount(type) {
-    var events = this._events;
-
-    if (events !== undefined) {
-        var evlistener = events[type];
-
-        if (typeof evlistener === 'function') {
-            return 1;
-        } else if (evlistener !== undefined) {
-            return evlistener.length;
-        }
-    }
-
-    return 0;
-}
-
-EventEmitter.prototype.eventNames = function eventNames() {
-    return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
-};
-
-function arrayClone(arr, n) {
-    var copy = new Array(n);
-    for (var i = 0; i < n; ++i) copy[i] = arr[i];
-    return copy;
-}
-
-function spliceOne(list, index) {
-    for (; index + 1 < list.length; index++) list[index] = list[index + 1];
-    list.pop();
-}
-
-function unwrapListeners(arr) {
-    var ret = new Array(arr.length);
-    for (var i = 0; i < ret.length; ++i) {
-        ret[i] = arr[i].listener || arr[i];
-    }
-    return ret;
-}
-
-function once(emitter, name) {
-    return new Promise(function (resolve, reject) {
-        function errorListener(err) {
-            emitter.removeListener(name, resolver);
-            reject(err);
-        }
-
-        function resolver() {
-            if (typeof emitter.removeListener === 'function') {
-                emitter.removeListener('error', errorListener);
-            }
-            resolve([].slice.call(arguments));
-        }
-
-        eventTargetAgnosticAddListener(emitter, name, resolver, { once: true });
-        if (name !== 'error') {
-            addErrorHandlerIfEventEmitter(emitter, errorListener, {
-                once: true,
-            });
-        }
-    });
-}
-
-function addErrorHandlerIfEventEmitter(emitter, handler, flags) {
-    if (typeof emitter.on === 'function') {
-        eventTargetAgnosticAddListener(emitter, 'error', handler, flags);
-    }
-}
-
-function eventTargetAgnosticAddListener(emitter, name, listener, flags) {
-    if (typeof emitter.on === 'function') {
-        if (flags.once) {
-            emitter.once(name, listener);
-        } else {
-            emitter.on(name, listener);
-        }
-    } else if (typeof emitter.addEventListener === 'function') {
-        // EventTarget does not have `error` event semantics like Node
-        // EventEmitters, we do not listen for `error` events here.
-        emitter.addEventListener(name, function wrapListener(arg) {
-            // IE does not have builtin `{ once: true }` support so we
-            // have to do it manually.
-            if (flags.once) {
-                emitter.removeEventListener(name, wrapListener);
-            }
-            listener(arg);
-        });
-    } else {
-        throw new TypeError(
-            'The "emitter" argument must be of type EventEmitter. Received type ' +
-                typeof emitter
-        );
-    }
-}

src/rewrite/html.js

@@ -1,4 +1,4 @@
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 import { parse, parseFragment, serialize } from 'parse5';
 
 class HTML extends EventEmitter {

src/rewrite/index.js

@@ -37,6 +37,7 @@ import parsel from './parsel.js';
 import UVClient from '../client/index.js';
 import Bowser from 'bowser';
 import BareClient from '@tomphttp/bare-client';
+import EventEmitter from 'events';
 
 const valid_chars =
     "!#$%&'*+-.0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ^_`abcdefghijklmnopqrstuvwxyz|~";
@@ -214,6 +215,7 @@ class Ultraviolet {
     static openDB = openDB;
     static Bowser = Bowser;
     static BareClient = BareClient;
+    static EventEmitter = EventEmitter;
 }
 
 export default Ultraviolet;

src/rewrite/js.js

@@ -1,7 +1,7 @@
 import { parseScript } from 'meriyah';
 // import { parse } from 'acorn-hammerhead';
 import { generate } from 'esotope-hammerhead';
-import EventEmitter from './events.js';
+import EventEmitter from 'events';
 
 class JS extends EventEmitter {
     constructor() {

src/uv.sw.js

@@ -31,7 +31,7 @@ const cspHeaders = [
 const emptyMethods = ['GET', 'HEAD'];
 const emptyStatus = [204, 304];
 
-class UVServiceWorker extends EventEmitter {
+class UVServiceWorker extends Ultraviolet.EventEmitter {
     constructor(config = __uv$config) {
         super();
         if (!config.bare) config.bare = '/bare/';
@@ -344,501 +344,3 @@ class HookEvent {
         this.#intercepted = true;
     }
 }
-
-var R = typeof Reflect === 'object' ? Reflect : null;
-var ReflectApply =
-    R && typeof R.apply === 'function'
-        ? R.apply
-        : function ReflectApply(target, receiver, args) {
-              return Function.prototype.apply.call(target, receiver, args);
-          };
-
-var ReflectOwnKeys;
-if (R && typeof R.ownKeys === 'function') {
-    ReflectOwnKeys = R.ownKeys;
-} else if (Object.getOwnPropertySymbols) {
-    ReflectOwnKeys = function ReflectOwnKeys(target) {
-        return Object.getOwnPropertyNames(target).concat(
-            Object.getOwnPropertySymbols(target)
-        );
-    };
-} else {
-    ReflectOwnKeys = function ReflectOwnKeys(target) {
-        return Object.getOwnPropertyNames(target);
-    };
-}
-
-function ProcessEmitWarning(warning) {
-    if (console && console.warn) console.warn(warning);
-}
-
-var NumberIsNaN =
-    Number.isNaN ||
-    function NumberIsNaN(value) {
-        return value !== value;
-    };
-
-function EventEmitter() {
-    EventEmitter.init.call(this);
-}
-
-// Backwards-compat with node 0.10.x
-EventEmitter.EventEmitter = EventEmitter;
-
-EventEmitter.prototype._events = undefined;
-EventEmitter.prototype._eventsCount = 0;
-EventEmitter.prototype._maxListeners = undefined;
-
-// By default EventEmitters will print a warning if more than 10 listeners are
-// added to it. This is a useful default which helps finding memory leaks.
-var defaultMaxListeners = 10;
-
-function checkListener(listener) {
-    if (typeof listener !== 'function') {
-        throw new TypeError(
-            'The "listener" argument must be of type Function. Received type ' +
-                typeof listener
-        );
-    }
-}
-
-Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
-    enumerable: true,
-    get: function () {
-        return defaultMaxListeners;
-    },
-    set: function (arg) {
-        if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {
-            throw new RangeError(
-                'The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' +
-                    arg +
-                    '.'
-            );
-        }
-        defaultMaxListeners = arg;
-    },
-});
-
-EventEmitter.init = function () {
-    if (
-        this._events === undefined ||
-        this._events === Object.getPrototypeOf(this)._events
-    ) {
-        this._events = Object.create(null);
-        this._eventsCount = 0;
-    }
-
-    this._maxListeners = this._maxListeners || undefined;
-};
-
-// Obviously not all Emitters should be limited to 10. This function allows
-// that to be increased. Set to zero for unlimited.
-EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
-    if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {
-        throw new RangeError(
-            'The value of "n" is out of range. It must be a non-negative number. Received ' +
-                n +
-                '.'
-        );
-    }
-    this._maxListeners = n;
-    return this;
-};
-
-function _getMaxListeners(that) {
-    if (that._maxListeners === undefined)
-        return EventEmitter.defaultMaxListeners;
-    return that._maxListeners;
-}
-
-EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
-    return _getMaxListeners(this);
-};
-
-EventEmitter.prototype.emit = function emit(type) {
-    var args = [];
-    for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);
-    var doError = type === 'error';
-
-    var events = this._events;
-    if (events !== undefined) doError = doError && events.error === undefined;
-    else if (!doError) return false;
-
-    // If there is no 'error' event listener then throw.
-    if (doError) {
-        var er;
-        if (args.length > 0) er = args[0];
-        if (er instanceof Error) {
-            // Note: The comments on the `throw` lines are intentional, they show
-            // up in Node's output if this results in an unhandled exception.
-            throw er; // Unhandled 'error' event
-        }
-        // At least give some kind of context to the user
-        var err = new Error(
-            'Unhandled error.' + (er ? ' (' + er.message + ')' : '')
-        );
-        err.context = er;
-        throw err; // Unhandled 'error' event
-    }
-
-    var handler = events[type];
-
-    if (handler === undefined) return false;
-
-    if (typeof handler === 'function') {
-        ReflectApply(handler, this, args);
-    } else {
-        var len = handler.length;
-        var listeners = arrayClone(handler, len);
-        for (var i = 0; i < len; ++i) ReflectApply(listeners[i], this, args);
-    }
-
-    return true;
-};
-
-function _addListener(target, type, listener, prepend) {
-    var m;
-    var events;
-    var existing;
-
-    checkListener(listener);
-
-    events = target._events;
-    if (events === undefined) {
-        events = target._events = Object.create(null);
-        target._eventsCount = 0;
-    } else {
-        // To avoid recursion in the case that type === "newListener"! Before
-        // adding it to the listeners, first emit "newListener".
-        if (events.newListener !== undefined) {
-            target.emit(
-                'newListener',
-                type,
-                listener.listener ? listener.listener : listener
-            );
-
-            // Re-assign `events` because a newListener handler could have caused the
-            // this._events to be assigned to a new object
-            events = target._events;
-        }
-        existing = events[type];
-    }
-
-    if (existing === undefined) {
-        // Optimize the case of one listener. Don't need the extra array object.
-        existing = events[type] = listener;
-        ++target._eventsCount;
-    } else {
-        if (typeof existing === 'function') {
-            // Adding the second element, need to change to array.
-            existing = events[type] = prepend
-                ? [listener, existing]
-                : [existing, listener];
-            // If we've already got an array, just append.
-        } else if (prepend) {
-            existing.unshift(listener);
-        } else {
-            existing.push(listener);
-        }
-
-        // Check for listener leak
-        m = _getMaxListeners(target);
-        if (m > 0 && existing.length > m && !existing.warned) {
-            existing.warned = true;
-            // No error code for this since it is a Warning
-            // eslint-disable-next-line no-restricted-syntax
-            var w = new Error(
-                'Possible EventEmitter memory leak detected. ' +
-                    existing.length +
-                    ' ' +
-                    String(type) +
-                    ' listeners ' +
-                    'added. Use emitter.setMaxListeners() to ' +
-                    'increase limit'
-            );
-            w.name = 'MaxListenersExceededWarning';
-            w.emitter = target;
-            w.type = type;
-            w.count = existing.length;
-            ProcessEmitWarning(w);
-        }
-    }
-
-    return target;
-}
-
-EventEmitter.prototype.addListener = function addListener(type, listener) {
-    return _addListener(this, type, listener, false);
-};
-
-EventEmitter.prototype.on = EventEmitter.prototype.addListener;
-
-EventEmitter.prototype.prependListener = function prependListener(
-    type,
-    listener
-) {
-    return _addListener(this, type, listener, true);
-};
-
-function onceWrapper() {
-    if (!this.fired) {
-        this.target.removeListener(this.type, this.wrapFn);
-        this.fired = true;
-        if (arguments.length === 0) return this.listener.call(this.target);
-        return this.listener.apply(this.target, arguments);
-    }
-}
-
-function _onceWrap(target, type, listener) {
-    var state = {
-        fired: false,
-        wrapFn: undefined,
-        target: target,
-        type: type,
-        listener: listener,
-    };
-    var wrapped = onceWrapper.bind(state);
-    wrapped.listener = listener;
-    state.wrapFn = wrapped;
-    return wrapped;
-}
-
-EventEmitter.prototype.once = function once(type, listener) {
-    checkListener(listener);
-    this.on(type, _onceWrap(this, type, listener));
-    return this;
-};
-
-EventEmitter.prototype.prependOnceListener = function prependOnceListener(
-    type,
-    listener
-) {
-    checkListener(listener);
-    this.prependListener(type, _onceWrap(this, type, listener));
-    return this;
-};
-
-// Emits a 'removeListener' event if and only if the listener was removed.
-EventEmitter.prototype.removeListener = function removeListener(
-    type,
-    listener
-) {
-    var list, events, position, i, originalListener;
-
-    checkListener(listener);
-
-    events = this._events;
-    if (events === undefined) return this;
-
-    list = events[type];
-    if (list === undefined) return this;
-
-    if (list === listener || list.listener === listener) {
-        if (--this._eventsCount === 0) this._events = Object.create(null);
-        else {
-            delete events[type];
-            if (events.removeListener)
-                this.emit('removeListener', type, list.listener || listener);
-        }
-    } else if (typeof list !== 'function') {
-        position = -1;
-
-        for (i = list.length - 1; i >= 0; i--) {
-            if (list[i] === listener || list[i].listener === listener) {
-                originalListener = list[i].listener;
-                position = i;
-                break;
-            }
-        }
-
-        if (position < 0) return this;
-
-        if (position === 0) list.shift();
-        else {
-            spliceOne(list, position);
-        }
-
-        if (list.length === 1) events[type] = list[0];
-
-        if (events.removeListener !== undefined)
-            this.emit('removeListener', type, originalListener || listener);
-    }
-
-    return this;
-};
-
-EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
-
-EventEmitter.prototype.removeAllListeners = function removeAllListeners(type) {
-    var listeners, events, i;
-
-    events = this._events;
-    if (events === undefined) return this;
-
-    // not listening for removeListener, no need to emit
-    if (events.removeListener === undefined) {
-        if (arguments.length === 0) {
-            this._events = Object.create(null);
-            this._eventsCount = 0;
-        } else if (events[type] !== undefined) {
-            if (--this._eventsCount === 0) this._events = Object.create(null);
-            else delete events[type];
-        }
-        return this;
-    }
-
-    // emit removeListener for all listeners on all events
-    if (arguments.length === 0) {
-        var keys = Object.keys(events);
-        var key;
-        for (i = 0; i < keys.length; ++i) {
-            key = keys[i];
-            if (key === 'removeListener') continue;
-            this.removeAllListeners(key);
-        }
-        this.removeAllListeners('removeListener');
-        this._events = Object.create(null);
-        this._eventsCount = 0;
-        return this;
-    }
-
-    listeners = events[type];
-
-    if (typeof listeners === 'function') {
-        this.removeListener(type, listeners);
-    } else if (listeners !== undefined) {
-        // LIFO order
-        for (i = listeners.length - 1; i >= 0; i--) {
-            this.removeListener(type, listeners[i]);
-        }
-    }
-
-    return this;
-};
-
-function _listeners(target, type, unwrap) {
-    var events = target._events;
-
-    if (events === undefined) return [];
-
-    var evlistener = events[type];
-    if (evlistener === undefined) return [];
-
-    if (typeof evlistener === 'function')
-        return unwrap ? [evlistener.listener || evlistener] : [evlistener];
-
-    return unwrap
-        ? unwrapListeners(evlistener)
-        : arrayClone(evlistener, evlistener.length);
-}
-
-EventEmitter.prototype.listeners = function listeners(type) {
-    return _listeners(this, type, true);
-};
-
-EventEmitter.prototype.rawListeners = function rawListeners(type) {
-    return _listeners(this, type, false);
-};
-
-EventEmitter.listenerCount = function (emitter, type) {
-    if (typeof emitter.listenerCount === 'function') {
-        return emitter.listenerCount(type);
-    } else {
-        return listenerCount.call(emitter, type);
-    }
-};
-
-EventEmitter.prototype.listenerCount = listenerCount;
-function listenerCount(type) {
-    var events = this._events;
-
-    if (events !== undefined) {
-        var evlistener = events[type];
-
-        if (typeof evlistener === 'function') {
-            return 1;
-        } else if (evlistener !== undefined) {
-            return evlistener.length;
-        }
-    }
-
-    return 0;
-}
-
-EventEmitter.prototype.eventNames = function eventNames() {
-    return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
-};
-
-function arrayClone(arr, n) {
-    var copy = new Array(n);
-    for (var i = 0; i < n; ++i) copy[i] = arr[i];
-    return copy;
-}
-
-function spliceOne(list, index) {
-    for (; index + 1 < list.length; index++) list[index] = list[index + 1];
-    list.pop();
-}
-
-function unwrapListeners(arr) {
-    var ret = new Array(arr.length);
-    for (var i = 0; i < ret.length; ++i) {
-        ret[i] = arr[i].listener || arr[i];
-    }
-    return ret;
-}
-
-function once(emitter, name) {
-    return new Promise(function (resolve, reject) {
-        function errorListener(err) {
-            emitter.removeListener(name, resolver);
-            reject(err);
-        }
-
-        function resolver() {
-            if (typeof emitter.removeListener === 'function') {
-                emitter.removeListener('error', errorListener);
-            }
-            resolve([].slice.call(arguments));
-        }
-
-        eventTargetAgnosticAddListener(emitter, name, resolver, { once: true });
-        if (name !== 'error') {
-            addErrorHandlerIfEventEmitter(emitter, errorListener, {
-                once: true,
-            });
-        }
-    });
-}
-
-function addErrorHandlerIfEventEmitter(emitter, handler, flags) {
-    if (typeof emitter.on === 'function') {
-        eventTargetAgnosticAddListener(emitter, 'error', handler, flags);
-    }
-}
-
-function eventTargetAgnosticAddListener(emitter, name, listener, flags) {
-    if (typeof emitter.on === 'function') {
-        if (flags.once) {
-            emitter.once(name, listener);
-        } else {
-            emitter.on(name, listener);
-        }
-    } else if (typeof emitter.addEventListener === 'function') {
-        // EventTarget does not have `error` event semantics like Node
-        // EventEmitters, we do not listen for `error` events here.
-        emitter.addEventListener(name, function wrapListener(arg) {
-            // IE does not have builtin `{ once: true }` support so we
-            // have to do it manually.
-            if (flags.once) {
-                emitter.removeEventListener(name, wrapListener);
-            }
-            listener(arg);
-        });
-    } else {
-        throw new TypeError(
-            'The "emitter" argument must be of type EventEmitter. Received type ' +
-                typeof emitter
-        );
-    }
-}