Current Dev State

static/js/ketcher2/node_modules/when/lib/makePromise.js

@@ -0,0 +1,955 @@
+/** @license MIT License (c) copyright 2010-2014 original author or authors */
+/** @author Brian Cavalier */
+/** @author John Hann */
+
+(function(define) { 'use strict';
+define(function() {
+
+	return function makePromise(environment) {
+
+		var tasks = environment.scheduler;
+		var emitRejection = initEmitRejection();
+
+		var objectCreate = Object.create ||
+			function(proto) {
+				function Child() {}
+				Child.prototype = proto;
+				return new Child();
+			};
+
+		/**
+		 * Create a promise whose fate is determined by resolver
+		 * @constructor
+		 * @returns {Promise} promise
+		 * @name Promise
+		 */
+		function Promise(resolver, handler) {
+			this._handler = resolver === Handler ? handler : init(resolver);
+		}
+
+		/**
+		 * Run the supplied resolver
+		 * @param resolver
+		 * @returns {Pending}
+		 */
+		function init(resolver) {
+			var handler = new Pending();
+
+			try {
+				resolver(promiseResolve, promiseReject, promiseNotify);
+			} catch (e) {
+				promiseReject(e);
+			}
+
+			return handler;
+
+			/**
+			 * Transition from pre-resolution state to post-resolution state, notifying
+			 * all listeners of the ultimate fulfillment or rejection
+			 * @param {*} x resolution value
+			 */
+			function promiseResolve (x) {
+				handler.resolve(x);
+			}
+			/**
+			 * Reject this promise with reason, which will be used verbatim
+			 * @param {Error|*} reason rejection reason, strongly suggested
+			 *   to be an Error type
+			 */
+			function promiseReject (reason) {
+				handler.reject(reason);
+			}
+
+			/**
+			 * @deprecated
+			 * Issue a progress event, notifying all progress listeners
+			 * @param {*} x progress event payload to pass to all listeners
+			 */
+			function promiseNotify (x) {
+				handler.notify(x);
+			}
+		}
+
+		// Creation
+
+		Promise.resolve = resolve;
+		Promise.reject = reject;
+		Promise.never = never;
+
+		Promise._defer = defer;
+		Promise._handler = getHandler;
+
+		/**
+		 * Returns a trusted promise. If x is already a trusted promise, it is
+		 * returned, otherwise returns a new trusted Promise which follows x.
+		 * @param  {*} x
+		 * @return {Promise} promise
+		 */
+		function resolve(x) {
+			return isPromise(x) ? x
+				: new Promise(Handler, new Async(getHandler(x)));
+		}
+
+		/**
+		 * Return a reject promise with x as its reason (x is used verbatim)
+		 * @param {*} x
+		 * @returns {Promise} rejected promise
+		 */
+		function reject(x) {
+			return new Promise(Handler, new Async(new Rejected(x)));
+		}
+
+		/**
+		 * Return a promise that remains pending forever
+		 * @returns {Promise} forever-pending promise.
+		 */
+		function never() {
+			return foreverPendingPromise; // Should be frozen
+		}
+
+		/**
+		 * Creates an internal {promise, resolver} pair
+		 * @private
+		 * @returns {Promise}
+		 */
+		function defer() {
+			return new Promise(Handler, new Pending());
+		}
+
+		// Transformation and flow control
+
+		/**
+		 * Transform this promise's fulfillment value, returning a new Promise
+		 * for the transformed result.  If the promise cannot be fulfilled, onRejected
+		 * is called with the reason.  onProgress *may* be called with updates toward
+		 * this promise's fulfillment.
+		 * @param {function=} onFulfilled fulfillment handler
+		 * @param {function=} onRejected rejection handler
+		 * @param {function=} onProgress @deprecated progress handler
+		 * @return {Promise} new promise
+		 */
+		Promise.prototype.then = function(onFulfilled, onRejected, onProgress) {
+			var parent = this._handler;
+			var state = parent.join().state();
+
+			if ((typeof onFulfilled !== 'function' && state > 0) ||
+				(typeof onRejected !== 'function' && state < 0)) {
+				// Short circuit: value will not change, simply share handler
+				return new this.constructor(Handler, parent);
+			}
+
+			var p = this._beget();
+			var child = p._handler;
+
+			parent.chain(child, parent.receiver, onFulfilled, onRejected, onProgress);
+
+			return p;
+		};
+
+		/**
+		 * If this promise cannot be fulfilled due to an error, call onRejected to
+		 * handle the error. Shortcut for .then(undefined, onRejected)
+		 * @param {function?} onRejected
+		 * @return {Promise}
+		 */
+		Promise.prototype['catch'] = function(onRejected) {
+			return this.then(void 0, onRejected);
+		};
+
+		/**
+		 * Creates a new, pending promise of the same type as this promise
+		 * @private
+		 * @returns {Promise}
+		 */
+		Promise.prototype._beget = function() {
+			return begetFrom(this._handler, this.constructor);
+		};
+
+		function begetFrom(parent, Promise) {
+			var child = new Pending(parent.receiver, parent.join().context);
+			return new Promise(Handler, child);
+		}
+
+		// Array combinators
+
+		Promise.all = all;
+		Promise.race = race;
+		Promise._traverse = traverse;
+
+		/**
+		 * Return a promise that will fulfill when all promises in the
+		 * input array have fulfilled, or will reject when one of the
+		 * promises rejects.
+		 * @param {array} promises array of promises
+		 * @returns {Promise} promise for array of fulfillment values
+		 */
+		function all(promises) {
+			return traverseWith(snd, null, promises);
+		}
+
+		/**
+		 * Array<Promise<X>> -> Promise<Array<f(X)>>
+		 * @private
+		 * @param {function} f function to apply to each promise's value
+		 * @param {Array} promises array of promises
+		 * @returns {Promise} promise for transformed values
+		 */
+		function traverse(f, promises) {
+			return traverseWith(tryCatch2, f, promises);
+		}
+
+		function traverseWith(tryMap, f, promises) {
+			var handler = typeof f === 'function' ? mapAt : settleAt;
+
+			var resolver = new Pending();
+			var pending = promises.length >>> 0;
+			var results = new Array(pending);
+
+			for (var i = 0, x; i < promises.length && !resolver.resolved; ++i) {
+				x = promises[i];
+
+				if (x === void 0 && !(i in promises)) {
+					--pending;
+					continue;
+				}
+
+				traverseAt(promises, handler, i, x, resolver);
+			}
+
+			if(pending === 0) {
+				resolver.become(new Fulfilled(results));
+			}
+
+			return new Promise(Handler, resolver);
+
+			function mapAt(i, x, resolver) {
+				if(!resolver.resolved) {
+					traverseAt(promises, settleAt, i, tryMap(f, x, i), resolver);
+				}
+			}
+
+			function settleAt(i, x, resolver) {
+				results[i] = x;
+				if(--pending === 0) {
+					resolver.become(new Fulfilled(results));
+				}
+			}
+		}
+
+		function traverseAt(promises, handler, i, x, resolver) {
+			if (maybeThenable(x)) {
+				var h = getHandlerMaybeThenable(x);
+				var s = h.state();
+
+				if (s === 0) {
+					h.fold(handler, i, void 0, resolver);
+				} else if (s > 0) {
+					handler(i, h.value, resolver);
+				} else {
+					resolver.become(h);
+					visitRemaining(promises, i+1, h);
+				}
+			} else {
+				handler(i, x, resolver);
+			}
+		}
+
+		Promise._visitRemaining = visitRemaining;
+		function visitRemaining(promises, start, handler) {
+			for(var i=start; i<promises.length; ++i) {
+				markAsHandled(getHandler(promises[i]), handler);
+			}
+		}
+
+		function markAsHandled(h, handler) {
+			if(h === handler) {
+				return;
+			}
+
+			var s = h.state();
+			if(s === 0) {
+				h.visit(h, void 0, h._unreport);
+			} else if(s < 0) {
+				h._unreport();
+			}
+		}
+
+		/**
+		 * Fulfill-reject competitive race. Return a promise that will settle
+		 * to the same state as the earliest input promise to settle.
+		 *
+		 * WARNING: The ES6 Promise spec requires that race()ing an empty array
+		 * must return a promise that is pending forever.  This implementation
+		 * returns a singleton forever-pending promise, the same singleton that is
+		 * returned by Promise.never(), thus can be checked with ===
+		 *
+		 * @param {array} promises array of promises to race
+		 * @returns {Promise} if input is non-empty, a promise that will settle
+		 * to the same outcome as the earliest input promise to settle. if empty
+		 * is empty, returns a promise that will never settle.
+		 */
+		function race(promises) {
+			if(typeof promises !== 'object' || promises === null) {
+				return reject(new TypeError('non-iterable passed to race()'));
+			}
+
+			// Sigh, race([]) is untestable unless we return *something*
+			// that is recognizable without calling .then() on it.
+			return promises.length === 0 ? never()
+				 : promises.length === 1 ? resolve(promises[0])
+				 : runRace(promises);
+		}
+
+		function runRace(promises) {
+			var resolver = new Pending();
+			var i, x, h;
+			for(i=0; i<promises.length; ++i) {
+				x = promises[i];
+				if (x === void 0 && !(i in promises)) {
+					continue;
+				}
+
+				h = getHandler(x);
+				if(h.state() !== 0) {
+					resolver.become(h);
+					visitRemaining(promises, i+1, h);
+					break;
+				} else {
+					h.visit(resolver, resolver.resolve, resolver.reject);
+				}
+			}
+			return new Promise(Handler, resolver);
+		}
+
+		// Promise internals
+		// Below this, everything is @private
+
+		/**
+		 * Get an appropriate handler for x, without checking for cycles
+		 * @param {*} x
+		 * @returns {object} handler
+		 */
+		function getHandler(x) {
+			if(isPromise(x)) {
+				return x._handler.join();
+			}
+			return maybeThenable(x) ? getHandlerUntrusted(x) : new Fulfilled(x);
+		}
+
+		/**
+		 * Get a handler for thenable x.
+		 * NOTE: You must only call this if maybeThenable(x) == true
+		 * @param {object|function|Promise} x
+		 * @returns {object} handler
+		 */
+		function getHandlerMaybeThenable(x) {
+			return isPromise(x) ? x._handler.join() : getHandlerUntrusted(x);
+		}
+
+		/**
+		 * Get a handler for potentially untrusted thenable x
+		 * @param {*} x
+		 * @returns {object} handler
+		 */
+		function getHandlerUntrusted(x) {
+			try {
+				var untrustedThen = x.then;
+				return typeof untrustedThen === 'function'
+					? new Thenable(untrustedThen, x)
+					: new Fulfilled(x);
+			} catch(e) {
+				return new Rejected(e);
+			}
+		}
+
+		/**
+		 * Handler for a promise that is pending forever
+		 * @constructor
+		 */
+		function Handler() {}
+
+		Handler.prototype.when
+			= Handler.prototype.become
+			= Handler.prototype.notify // deprecated
+			= Handler.prototype.fail
+			= Handler.prototype._unreport
+			= Handler.prototype._report
+			= noop;
+
+		Handler.prototype._state = 0;
+
+		Handler.prototype.state = function() {
+			return this._state;
+		};
+
+		/**
+		 * Recursively collapse handler chain to find the handler
+		 * nearest to the fully resolved value.
+		 * @returns {object} handler nearest the fully resolved value
+		 */
+		Handler.prototype.join = function() {
+			var h = this;
+			while(h.handler !== void 0) {
+				h = h.handler;
+			}
+			return h;
+		};
+
+		Handler.prototype.chain = function(to, receiver, fulfilled, rejected, progress) {
+			this.when({
+				resolver: to,
+				receiver: receiver,
+				fulfilled: fulfilled,
+				rejected: rejected,
+				progress: progress
+			});
+		};
+
+		Handler.prototype.visit = function(receiver, fulfilled, rejected, progress) {
+			this.chain(failIfRejected, receiver, fulfilled, rejected, progress);
+		};
+
+		Handler.prototype.fold = function(f, z, c, to) {
+			this.when(new Fold(f, z, c, to));
+		};
+
+		/**
+		 * Handler that invokes fail() on any handler it becomes
+		 * @constructor
+		 */
+		function FailIfRejected() {}
+
+		inherit(Handler, FailIfRejected);
+
+		FailIfRejected.prototype.become = function(h) {
+			h.fail();
+		};
+
+		var failIfRejected = new FailIfRejected();
+
+		/**
+		 * Handler that manages a queue of consumers waiting on a pending promise
+		 * @constructor
+		 */
+		function Pending(receiver, inheritedContext) {
+			Promise.createContext(this, inheritedContext);
+
+			this.consumers = void 0;
+			this.receiver = receiver;
+			this.handler = void 0;
+			this.resolved = false;
+		}
+
+		inherit(Handler, Pending);
+
+		Pending.prototype._state = 0;
+
+		Pending.prototype.resolve = function(x) {
+			this.become(getHandler(x));
+		};
+
+		Pending.prototype.reject = function(x) {
+			if(this.resolved) {
+				return;
+			}
+
+			this.become(new Rejected(x));
+		};
+
+		Pending.prototype.join = function() {
+			if (!this.resolved) {
+				return this;
+			}
+
+			var h = this;
+
+			while (h.handler !== void 0) {
+				h = h.handler;
+				if (h === this) {
+					return this.handler = cycle();
+				}
+			}
+
+			return h;
+		};
+
+		Pending.prototype.run = function() {
+			var q = this.consumers;
+			var handler = this.handler;
+			this.handler = this.handler.join();
+			this.consumers = void 0;
+
+			for (var i = 0; i < q.length; ++i) {
+				handler.when(q[i]);
+			}
+		};
+
+		Pending.prototype.become = function(handler) {
+			if(this.resolved) {
+				return;
+			}
+
+			this.resolved = true;
+			this.handler = handler;
+			if(this.consumers !== void 0) {
+				tasks.enqueue(this);
+			}
+
+			if(this.context !== void 0) {
+				handler._report(this.context);
+			}
+		};
+
+		Pending.prototype.when = function(continuation) {
+			if(this.resolved) {
+				tasks.enqueue(new ContinuationTask(continuation, this.handler));
+			} else {
+				if(this.consumers === void 0) {
+					this.consumers = [continuation];
+				} else {
+					this.consumers.push(continuation);
+				}
+			}
+		};
+
+		/**
+		 * @deprecated
+		 */
+		Pending.prototype.notify = function(x) {
+			if(!this.resolved) {
+				tasks.enqueue(new ProgressTask(x, this));
+			}
+		};
+
+		Pending.prototype.fail = function(context) {
+			var c = typeof context === 'undefined' ? this.context : context;
+			this.resolved && this.handler.join().fail(c);
+		};
+
+		Pending.prototype._report = function(context) {
+			this.resolved && this.handler.join()._report(context);
+		};
+
+		Pending.prototype._unreport = function() {
+			this.resolved && this.handler.join()._unreport();
+		};
+
+		/**
+		 * Wrap another handler and force it into a future stack
+		 * @param {object} handler
+		 * @constructor
+		 */
+		function Async(handler) {
+			this.handler = handler;
+		}
+
+		inherit(Handler, Async);
+
+		Async.prototype.when = function(continuation) {
+			tasks.enqueue(new ContinuationTask(continuation, this));
+		};
+
+		Async.prototype._report = function(context) {
+			this.join()._report(context);
+		};
+
+		Async.prototype._unreport = function() {
+			this.join()._unreport();
+		};
+
+		/**
+		 * Handler that wraps an untrusted thenable and assimilates it in a future stack
+		 * @param {function} then
+		 * @param {{then: function}} thenable
+		 * @constructor
+		 */
+		function Thenable(then, thenable) {
+			Pending.call(this);
+			tasks.enqueue(new AssimilateTask(then, thenable, this));
+		}
+
+		inherit(Pending, Thenable);
+
+		/**
+		 * Handler for a fulfilled promise
+		 * @param {*} x fulfillment value
+		 * @constructor
+		 */
+		function Fulfilled(x) {
+			Promise.createContext(this);
+			this.value = x;
+		}
+
+		inherit(Handler, Fulfilled);
+
+		Fulfilled.prototype._state = 1;
+
+		Fulfilled.prototype.fold = function(f, z, c, to) {
+			runContinuation3(f, z, this, c, to);
+		};
+
+		Fulfilled.prototype.when = function(cont) {
+			runContinuation1(cont.fulfilled, this, cont.receiver, cont.resolver);
+		};
+
+		var errorId = 0;
+
+		/**
+		 * Handler for a rejected promise
+		 * @param {*} x rejection reason
+		 * @constructor
+		 */
+		function Rejected(x) {
+			Promise.createContext(this);
+
+			this.id = ++errorId;
+			this.value = x;
+			this.handled = false;
+			this.reported = false;
+
+			this._report();
+		}
+
+		inherit(Handler, Rejected);
+
+		Rejected.prototype._state = -1;
+
+		Rejected.prototype.fold = function(f, z, c, to) {
+			to.become(this);
+		};
+
+		Rejected.prototype.when = function(cont) {
+			if(typeof cont.rejected === 'function') {
+				this._unreport();
+			}
+			runContinuation1(cont.rejected, this, cont.receiver, cont.resolver);
+		};
+
+		Rejected.prototype._report = function(context) {
+			tasks.afterQueue(new ReportTask(this, context));
+		};
+
+		Rejected.prototype._unreport = function() {
+			if(this.handled) {
+				return;
+			}
+			this.handled = true;
+			tasks.afterQueue(new UnreportTask(this));
+		};
+
+		Rejected.prototype.fail = function(context) {
+			this.reported = true;
+			emitRejection('unhandledRejection', this);
+			Promise.onFatalRejection(this, context === void 0 ? this.context : context);
+		};
+
+		function ReportTask(rejection, context) {
+			this.rejection = rejection;
+			this.context = context;
+		}
+
+		ReportTask.prototype.run = function() {
+			if(!this.rejection.handled && !this.rejection.reported) {
+				this.rejection.reported = true;
+				emitRejection('unhandledRejection', this.rejection) ||
+					Promise.onPotentiallyUnhandledRejection(this.rejection, this.context);
+			}
+		};
+
+		function UnreportTask(rejection) {
+			this.rejection = rejection;
+		}
+
+		UnreportTask.prototype.run = function() {
+			if(this.rejection.reported) {
+				emitRejection('rejectionHandled', this.rejection) ||
+					Promise.onPotentiallyUnhandledRejectionHandled(this.rejection);
+			}
+		};
+
+		// Unhandled rejection hooks
+		// By default, everything is a noop
+
+		Promise.createContext
+			= Promise.enterContext
+			= Promise.exitContext
+			= Promise.onPotentiallyUnhandledRejection
+			= Promise.onPotentiallyUnhandledRejectionHandled
+			= Promise.onFatalRejection
+			= noop;
+
+		// Errors and singletons
+
+		var foreverPendingHandler = new Handler();
+		var foreverPendingPromise = new Promise(Handler, foreverPendingHandler);
+
+		function cycle() {
+			return new Rejected(new TypeError('Promise cycle'));
+		}
+
+		// Task runners
+
+		/**
+		 * Run a single consumer
+		 * @constructor
+		 */
+		function ContinuationTask(continuation, handler) {
+			this.continuation = continuation;
+			this.handler = handler;
+		}
+
+		ContinuationTask.prototype.run = function() {
+			this.handler.join().when(this.continuation);
+		};
+
+		/**
+		 * Run a queue of progress handlers
+		 * @constructor
+		 */
+		function ProgressTask(value, handler) {
+			this.handler = handler;
+			this.value = value;
+		}
+
+		ProgressTask.prototype.run = function() {
+			var q = this.handler.consumers;
+			if(q === void 0) {
+				return;
+			}
+
+			for (var c, i = 0; i < q.length; ++i) {
+				c = q[i];
+				runNotify(c.progress, this.value, this.handler, c.receiver, c.resolver);
+			}
+		};
+
+		/**
+		 * Assimilate a thenable, sending it's value to resolver
+		 * @param {function} then
+		 * @param {object|function} thenable
+		 * @param {object} resolver
+		 * @constructor
+		 */
+		function AssimilateTask(then, thenable, resolver) {
+			this._then = then;
+			this.thenable = thenable;
+			this.resolver = resolver;
+		}
+
+		AssimilateTask.prototype.run = function() {
+			var h = this.resolver;
+			tryAssimilate(this._then, this.thenable, _resolve, _reject, _notify);
+
+			function _resolve(x) { h.resolve(x); }
+			function _reject(x)  { h.reject(x); }
+			function _notify(x)  { h.notify(x); }
+		};
+
+		function tryAssimilate(then, thenable, resolve, reject, notify) {
+			try {
+				then.call(thenable, resolve, reject, notify);
+			} catch (e) {
+				reject(e);
+			}
+		}
+
+		/**
+		 * Fold a handler value with z
+		 * @constructor
+		 */
+		function Fold(f, z, c, to) {
+			this.f = f; this.z = z; this.c = c; this.to = to;
+			this.resolver = failIfRejected;
+			this.receiver = this;
+		}
+
+		Fold.prototype.fulfilled = function(x) {
+			this.f.call(this.c, this.z, x, this.to);
+		};
+
+		Fold.prototype.rejected = function(x) {
+			this.to.reject(x);
+		};
+
+		Fold.prototype.progress = function(x) {
+			this.to.notify(x);
+		};
+
+		// Other helpers
+
+		/**
+		 * @param {*} x
+		 * @returns {boolean} true iff x is a trusted Promise
+		 */
+		function isPromise(x) {
+			return x instanceof Promise;
+		}
+
+		/**
+		 * Test just enough to rule out primitives, in order to take faster
+		 * paths in some code
+		 * @param {*} x
+		 * @returns {boolean} false iff x is guaranteed *not* to be a thenable
+		 */
+		function maybeThenable(x) {
+			return (typeof x === 'object' || typeof x === 'function') && x !== null;
+		}
+
+		function runContinuation1(f, h, receiver, next) {
+			if(typeof f !== 'function') {
+				return next.become(h);
+			}
+
+			Promise.enterContext(h);
+			tryCatchReject(f, h.value, receiver, next);
+			Promise.exitContext();
+		}
+
+		function runContinuation3(f, x, h, receiver, next) {
+			if(typeof f !== 'function') {
+				return next.become(h);
+			}
+
+			Promise.enterContext(h);
+			tryCatchReject3(f, x, h.value, receiver, next);
+			Promise.exitContext();
+		}
+
+		/**
+		 * @deprecated
+		 */
+		function runNotify(f, x, h, receiver, next) {
+			if(typeof f !== 'function') {
+				return next.notify(x);
+			}
+
+			Promise.enterContext(h);
+			tryCatchReturn(f, x, receiver, next);
+			Promise.exitContext();
+		}
+
+		function tryCatch2(f, a, b) {
+			try {
+				return f(a, b);
+			} catch(e) {
+				return reject(e);
+			}
+		}
+
+		/**
+		 * Return f.call(thisArg, x), or if it throws return a rejected promise for
+		 * the thrown exception
+		 */
+		function tryCatchReject(f, x, thisArg, next) {
+			try {
+				next.become(getHandler(f.call(thisArg, x)));
+			} catch(e) {
+				next.become(new Rejected(e));
+			}
+		}
+
+		/**
+		 * Same as above, but includes the extra argument parameter.
+		 */
+		function tryCatchReject3(f, x, y, thisArg, next) {
+			try {
+				f.call(thisArg, x, y, next);
+			} catch(e) {
+				next.become(new Rejected(e));
+			}
+		}
+
+		/**
+		 * @deprecated
+		 * Return f.call(thisArg, x), or if it throws, *return* the exception
+		 */
+		function tryCatchReturn(f, x, thisArg, next) {
+			try {
+				next.notify(f.call(thisArg, x));
+			} catch(e) {
+				next.notify(e);
+			}
+		}
+
+		function inherit(Parent, Child) {
+			Child.prototype = objectCreate(Parent.prototype);
+			Child.prototype.constructor = Child;
+		}
+
+		function snd(x, y) {
+			return y;
+		}
+
+		function noop() {}
+
+		function hasCustomEvent() {
+			if(typeof CustomEvent === 'function') {
+				try {
+					var ev = new CustomEvent('unhandledRejection');
+					return ev instanceof CustomEvent;
+				} catch (ignoredException) {}
+			}
+			return false;
+		}
+
+		function hasInternetExplorerCustomEvent() {
+			if(typeof document !== 'undefined' && typeof document.createEvent === 'function') {
+				try {
+					// Try to create one event to make sure it's supported
+					var ev = document.createEvent('CustomEvent');
+					ev.initCustomEvent('eventType', false, true, {});
+					return true;
+				} catch (ignoredException) {}
+			}
+			return false;
+		}
+
+		function initEmitRejection() {
+			/*global process, self, CustomEvent*/
+			if(typeof process !== 'undefined' && process !== null
+				&& typeof process.emit === 'function') {
+				// Returning falsy here means to call the default
+				// onPotentiallyUnhandledRejection API.  This is safe even in
+				// browserify since process.emit always returns falsy in browserify:
+				// https://github.com/defunctzombie/node-process/blob/master/browser.js#L40-L46
+				return function(type, rejection) {
+					return type === 'unhandledRejection'
+						? process.emit(type, rejection.value, rejection)
+						: process.emit(type, rejection);
+				};
+			} else if(typeof self !== 'undefined' && hasCustomEvent()) {
+				return (function (self, CustomEvent) {
+					return function (type, rejection) {
+						var ev = new CustomEvent(type, {
+							detail: {
+								reason: rejection.value,
+								key: rejection
+							},
+							bubbles: false,
+							cancelable: true
+						});
+
+						return !self.dispatchEvent(ev);
+					};
+				}(self, CustomEvent));
+			} else if(typeof self !== 'undefined' && hasInternetExplorerCustomEvent()) {
+				return (function(self, document) {
+					return function(type, rejection) {
+						var ev = document.createEvent('CustomEvent');
+						ev.initCustomEvent(type, false, true, {
+							reason: rejection.value,
+							key: rejection
+						});
+
+						return !self.dispatchEvent(ev);
+					};
+				}(self, document));
+			}
+
+			return noop;
+		}
+
+		return Promise;
+	};
+});
+}(typeof define === 'function' && define.amd ? define : function(factory) { module.exports = factory(); }));