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epub.js/libs/rsvp/rsvp.js
Fred Chasen 82b4835c59 Updated CFI to use caretPositionFromPoint
2014-04-09 23:17:13 -07:00

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(function(global) {
var define, requireModule, require, requirejs;
(function() {
var registry = {}, seen = {};
define = function(name, deps, callback) {
registry[name] = { deps: deps, callback: callback };
};
requirejs = require = requireModule = function(name) {
requirejs._eak_seen = registry;
if (seen[name]) { return seen[name]; }
seen[name] = {};
if (!registry[name]) {
throw new Error("Could not find module " + name);
}
var mod = registry[name],
deps = mod.deps,
callback = mod.callback,
reified = [],
exports;
for (var i=0, l=deps.length; i<l; i++) {
if (deps[i] === 'exports') {
reified.push(exports = {});
} else {
reified.push(requireModule(resolve(deps[i])));
}
}
var value = callback.apply(this, reified);
return seen[name] = exports || value;
function resolve(child) {
if (child.charAt(0) !== '.') { return child; }
var parts = child.split("/");
var parentBase = name.split("/").slice(0, -1);
for (var i=0, l=parts.length; i<l; i++) {
var part = parts[i];
if (part === '..') { parentBase.pop(); }
else if (part === '.') { continue; }
else { parentBase.push(part); }
}
return parentBase.join("/");
}
};
})();
define("rsvp/all",
["./promise","exports"],
function(__dependency1__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
__exports__["default"] = function all(array, label) {
return Promise.all(array, label);
};
});
define("rsvp/all_settled",
["./promise","./utils","exports"],
function(__dependency1__, __dependency2__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
var isArray = __dependency2__.isArray;
var isNonThenable = __dependency2__.isNonThenable;
/**
`RSVP.allSettled` is similar to `RSVP.all`, but instead of implementing
a fail-fast method, it waits until all the promises have returned and
shows you all the results. This is useful if you want to handle multiple
promises' failure states together as a set.
Returns a promise that is fulfilled when all the given promises have been
settled. The return promise is fulfilled with an array of the states of
the promises passed into the `promises` array argument.
Each state object will either indicate fulfillment or rejection, and
provide the corresponding value or reason. The states will take one of
the following formats:
```javascript
{ state: 'fulfilled', value: value }
or
{ state: 'rejected', reason: reason }
```
Example:
```javascript
var promise1 = RSVP.Promise.resolve(1);
var promise2 = RSVP.Promise.reject(new Error('2'));
var promise3 = RSVP.Promise.reject(new Error('3'));
var promises = [ promise1, promise2, promise3 ];
RSVP.allSettled(promises).then(function(array){
// array == [
// { state: 'fulfilled', value: 1 },
// { state: 'rejected', reason: Error },
// { state: 'rejected', reason: Error }
// ]
// Note that for the second item, reason.message will be "2", and for the
// third item, reason.message will be "3".
}, function(error) {
// Not run. (This block would only be called if allSettled had failed,
// for instance if passed an incorrect argument type.)
});
```
@method @allSettled
@for RSVP
@param {Array} promises;
@param {String} label - optional string that describes the promise.
Useful for tooling.
@return {Promise} promise that is fulfilled with an array of the settled
states of the constituent promises.
*/
__exports__["default"] = function allSettled(entries, label) {
return new Promise(function(resolve, reject) {
if (!isArray(entries)) {
throw new TypeError('You must pass an array to allSettled.');
}
var remaining = entries.length;
var entry;
if (remaining === 0) {
resolve([]);
return;
}
var results = new Array(remaining);
function fulfilledResolver(index) {
return function(value) {
resolveAll(index, fulfilled(value));
};
}
function rejectedResolver(index) {
return function(reason) {
resolveAll(index, rejected(reason));
};
}
function resolveAll(index, value) {
results[index] = value;
if (--remaining === 0) {
resolve(results);
}
}
for (var index = 0; index < entries.length; index++) {
entry = entries[index];
if (isNonThenable(entry)) {
resolveAll(index, fulfilled(entry));
} else {
Promise.cast(entry).then(fulfilledResolver(index), rejectedResolver(index));
}
}
}, label);
};
function fulfilled(value) {
return { state: 'fulfilled', value: value };
}
function rejected(reason) {
return { state: 'rejected', reason: reason };
}
});
define("rsvp/asap",
["exports"],
function(__exports__) {
"use strict";
__exports__["default"] = function asap(callback, arg) {
var length = queue.push([callback, arg]);
if (length === 1) {
// If length is 1, that means that we need to schedule an async flush.
// If additional callbacks are queued before the queue is flushed, they
// will be processed by this flush that we are scheduling.
scheduleFlush();
}
};
var browserGlobal = (typeof window !== 'undefined') ? window : {};
var BrowserMutationObserver = browserGlobal.MutationObserver || browserGlobal.WebKitMutationObserver;
// node
function useNextTick() {
return function() {
process.nextTick(flush);
};
}
function useMutationObserver() {
var iterations = 0;
var observer = new BrowserMutationObserver(flush);
var node = document.createTextNode('');
observer.observe(node, { characterData: true });
return function() {
node.data = (iterations = ++iterations % 2);
};
}
function useSetTimeout() {
return function() {
setTimeout(flush, 1);
};
}
var queue = [];
function flush() {
for (var i = 0; i < queue.length; i++) {
var tuple = queue[i];
var callback = tuple[0], arg = tuple[1];
callback(arg);
}
queue = [];
}
var scheduleFlush;
// Decide what async method to use to triggering processing of queued callbacks:
if (typeof process !== 'undefined' && {}.toString.call(process) === '[object process]') {
scheduleFlush = useNextTick();
} else if (BrowserMutationObserver) {
scheduleFlush = useMutationObserver();
} else {
scheduleFlush = useSetTimeout();
}
});
define("rsvp/config",
["./events","exports"],
function(__dependency1__, __exports__) {
"use strict";
var EventTarget = __dependency1__["default"];
var config = {
instrument: false
};
EventTarget.mixin(config);
function configure(name, value) {
if (name === 'onerror') {
// handle for legacy users that expect the actual
// error to be passed to their function added via
// `RSVP.configure('onerror', someFunctionHere);`
config.on('error', value);
return;
}
if (arguments.length === 2) {
config[name] = value;
} else {
return config[name];
}
}
__exports__.config = config;
__exports__.configure = configure;
});
define("rsvp/defer",
["./promise","exports"],
function(__dependency1__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
/**
`RSVP.defer` returns an object similar to jQuery's `$.Deferred` objects.
`RSVP.defer` should be used when porting over code reliant on `$.Deferred`'s
interface. New code should use the `RSVP.Promise` constructor instead.
The object returned from `RSVP.defer` is a plain object with three properties:
* promise - an `RSVP.Promise`.
* reject - a function that causes the `promise` property on this object to
become rejected
* resolve - a function that causes the `promise` property on this object to
become fulfilled.
Example:
```javascript
var deferred = RSVP.defer();
deferred.resolve("Success!");
defered.promise.then(function(value){
// value here is "Success!"
});
```
@method defer
@for RSVP
@param {String} label optional string for labeling the promise.
Useful for tooling.
@return {Object}
*/
__exports__["default"] = function defer(label) {
var deferred = { };
deferred.promise = new Promise(function(resolve, reject) {
deferred.resolve = resolve;
deferred.reject = reject;
}, label);
return deferred;
};
});
define("rsvp/events",
["exports"],
function(__exports__) {
"use strict";
var indexOf = function(callbacks, callback) {
for (var i=0, l=callbacks.length; i<l; i++) {
if (callbacks[i] === callback) { return i; }
}
return -1;
};
var callbacksFor = function(object) {
var callbacks = object._promiseCallbacks;
if (!callbacks) {
callbacks = object._promiseCallbacks = {};
}
return callbacks;
};
/**
//@module RSVP
//@class EventTarget
*/
__exports__["default"] = {
/**
`RSVP.EventTarget.mixin` extends an object with EventTarget methods. For
Example:
```javascript
var object = {};
RSVP.EventTarget.mixin(object);
object.on("finished", function(event) {
// handle event
});
object.trigger("finished", { detail: value });
```
`EventTarget.mixin` also works with prototypes:
```javascript
var Person = function() {};
RSVP.EventTarget.mixin(Person.prototype);
var yehuda = new Person();
var tom = new Person();
yehuda.on("poke", function(event) {
console.log("Yehuda says OW");
});
tom.on("poke", function(event) {
console.log("Tom says OW");
});
yehuda.trigger("poke");
tom.trigger("poke");
```
@method mixin
@param {Object} object object to extend with EventTarget methods
@private
*/
mixin: function(object) {
object.on = this.on;
object.off = this.off;
object.trigger = this.trigger;
object._promiseCallbacks = undefined;
return object;
},
/**
Registers a callback to be executed when `eventName` is triggered
```javascript
object.on('event', function(eventInfo){
// handle the event
});
object.trigger('event');
```
@method on
@param {String} eventName name of the event to listen for
@param {Function} callback function to be called when the event is triggered.
@private
*/
on: function(eventName, callback) {
var allCallbacks = callbacksFor(this), callbacks;
callbacks = allCallbacks[eventName];
if (!callbacks) {
callbacks = allCallbacks[eventName] = [];
}
if (indexOf(callbacks, callback) === -1) {
callbacks.push(callback);
}
},
/**
You can use `off` to stop firing a particular callback for an event:
```javascript
function doStuff() { // do stuff! }
object.on('stuff', doStuff);
object.trigger('stuff'); // doStuff will be called
// Unregister ONLY the doStuff callback
object.off('stuff', doStuff);
object.trigger('stuff'); // doStuff will NOT be called
```
If you don't pass a `callback` argument to `off`, ALL callbacks for the
event will not be executed when the event fires. For example:
```javascript
var callback1 = function(){};
var callback2 = function(){};
object.on('stuff', callback1);
object.on('stuff', callback2);
object.trigger('stuff'); // callback1 and callback2 will be executed.
object.off('stuff');
object.trigger('stuff'); // callback1 and callback2 will not be executed!
```
@method off
@param {String} eventName event to stop listening to
@param {Function} callback optional argument. If given, only the function
given will be removed from the event's callback queue. If no `callback`
argument is given, all callbacks will be removed from the event's callback
queue.
@private
*/
off: function(eventName, callback) {
var allCallbacks = callbacksFor(this), callbacks, index;
if (!callback) {
allCallbacks[eventName] = [];
return;
}
callbacks = allCallbacks[eventName];
index = indexOf(callbacks, callback);
if (index !== -1) { callbacks.splice(index, 1); }
},
/**
Use `trigger` to fire custom events. For example:
```javascript
object.on('foo', function(){
console.log('foo event happened!');
});
object.trigger('foo');
// 'foo event happened!' logged to the console
```
You can also pass a value as a second argument to `trigger` that will be
passed as an argument to all event listeners for the event:
```javascript
object.on('foo', function(value){
console.log(value.name);
});
object.trigger('foo', { name: 'bar' });
// 'bar' logged to the console
```
@method trigger
@param {String} eventName name of the event to be triggered
@param {Any} options optional value to be passed to any event handlers for
the given `eventName`
@private
*/
trigger: function(eventName, options) {
var allCallbacks = callbacksFor(this),
callbacks, callbackTuple, callback, binding;
if (callbacks = allCallbacks[eventName]) {
// Don't cache the callbacks.length since it may grow
for (var i=0; i<callbacks.length; i++) {
callback = callbacks[i];
callback(options);
}
}
}
};
});
define("rsvp/filter",
["./all","./map","./utils","exports"],
function(__dependency1__, __dependency2__, __dependency3__, __exports__) {
"use strict";
var all = __dependency1__["default"];
var map = __dependency2__["default"];
var isFunction = __dependency3__.isFunction;
var isArray = __dependency3__.isArray;
/**
`RSVP.filter` is similar to JavaScript's native `filter` method, except that it
waits for all promises to become fulfilled before running the `filterFn` on
each item in given to `promises`. `RSVP.filterFn` returns a promise that will
become fulfilled with the result of running `filterFn` on the values the
promises become fulfilled with.
For example:
```javascript
var promise1 = RSVP.resolve(1);
var promise2 = RSVP.resolve(2);
var promise3 = RSVP.resolve(3);
var filterFn = function(item){
return item > 1;
};
RSVP.filter(promises, filterFn).then(function(result){
// result is [ 2, 3 ]
});
```
If any of the `promises` given to `RSVP.filter` are rejected, the first promise
that is rejected will be given as an argument to the returned promises's
rejection handler. For example:
```javascript
var promise1 = RSVP.resolve(1);
var promise2 = RSVP.reject(new Error("2"));
var promise3 = RSVP.reject(new Error("3"));
var promises = [ promise1, promise2, promise3 ];
var filterFn = function(item){
return item > 1;
};
RSVP.filter(promises, filterFn).then(function(array){
// Code here never runs because there are rejected promises!
}, function(reason) {
// reason.message === "2"
});
```
`RSVP.filter` will also wait for any promises returned from `filterFn`.
For instance, you may want to fetch a list of users then return a subset
of those users based on some asynchronous operation:
```javascript
var alice = { name: 'alice' };
var bob = { name: 'bob' };
var users = [ alice, bob ];
var promises = users.map(function(user){
return RSVP.resolve(user);
});
var filterFn = function(user){
// Here, Alice has permissions to create a blog post, but Bob does not.
return getPrivilegesForUser(user).then(function(privs){
return privs.can_create_blog_post === true;
});
};
RSVP.filter(promises, filterFn).then(function(users){
// true, because the server told us only Alice can create a blog post.
users.length === 1;
// false, because Alice is the only user present in `users`
users[0] === bob;
});
```
@method filter
@for RSVP
@param {Array} promises
@param {Function} filterFn - function to be called on each resolved value to
filter the final results.
@param {String} label optional string describing the promise. Useful for
tooling.
@return {Promise}
*/
function filter(promises, filterFn, label) {
if (!isArray(promises)) {
throw new TypeError('You must pass an array to filter.');
}
if (!isFunction(filterFn)){
throw new TypeError("You must pass a function to filter's second argument.");
}
return all(promises, label).then(function(values){
return map(promises, filterFn, label).then(function(filterResults){
var i,
valuesLen = values.length,
filtered = [];
for (i = 0; i < valuesLen; i++){
if(filterResults[i]) filtered.push(values[i]);
}
return filtered;
});
});
}
__exports__["default"] = filter;
});
define("rsvp/hash",
["./promise","./utils","exports"],
function(__dependency1__, __dependency2__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
var isNonThenable = __dependency2__.isNonThenable;
var keysOf = __dependency2__.keysOf;
/**
`RSVP.hash` is similar to `RSVP.all`, but takes an object instead of an array
for its `promises` argument.
Returns a promise that is fulfilled when all the given promises have been
fulfilled, or rejected if any of them become rejected. The returned promise
is fulfilled with a hash that has the same key names as the `promises` object
argument. If any of the values in the object are not promises, they will
simply be copied over to the fulfilled object.
Example:
```javascript
var promises = {
myPromise: RSVP.resolve(1),
yourPromise: RSVP.resolve(2),
theirPromise: RSVP.resolve(3),
notAPromise: 4
};
RSVP.hash(promises).then(function(hash){
// hash here is an object that looks like:
// {
// myPromise: 1,
// yourPromise: 2,
// theirPromise: 3,
// notAPromise: 4
// }
});
````
If any of the `promises` given to `RSVP.hash` are rejected, the first promise
that is rejected will be given as as the first argument, or as the reason to
the rejection handler. For example:
```javascript
var promises = {
myPromise: RSVP.resolve(1),
rejectedPromise: RSVP.reject(new Error("rejectedPromise")),
anotherRejectedPromise: RSVP.reject(new Error("anotherRejectedPromise")),
};
RSVP.hash(promises).then(function(hash){
// Code here never runs because there are rejected promises!
}, function(reason) {
// reason.message === "rejectedPromise"
});
```
An important note: `RSVP.hash` is intended for plain JavaScript objects that
are just a set of keys and values. `RSVP.hash` will NOT preserve prototype
chains.
Example:
```javascript
function MyConstructor(){
this.example = RSVP.resolve("Example");
}
MyConstructor.prototype = {
protoProperty: RSVP.resolve("Proto Property")
};
var myObject = new MyConstructor();
RSVP.hash(myObject).then(function(hash){
// protoProperty will not be present, instead you will just have an
// object that looks like:
// {
// example: "Example"
// }
//
// hash.hasOwnProperty('protoProperty'); // false
// 'undefined' === typeof hash.protoProperty
});
```
@method hash
@for RSVP
@param {Object} promises
@param {String} label - optional string that describes the promise.
Useful for tooling.
@return {Promise} promise that is fulfilled when all properties of `promises`
have been fulfilled, or rejected if any of them become rejected.
*/
__exports__["default"] = function hash(object, label) {
return new Promise(function(resolve, reject){
var results = {};
var keys = keysOf(object);
var remaining = keys.length;
var entry, property;
if (remaining === 0) {
resolve(results);
return;
}
function fulfilledTo(property) {
return function(value) {
results[property] = value;
if (--remaining === 0) {
resolve(results);
}
};
}
function onRejection(reason) {
remaining = 0;
reject(reason);
}
for (var i = 0; i < keys.length; i++) {
property = keys[i];
entry = object[property];
if (isNonThenable(entry)) {
results[property] = entry;
if (--remaining === 0) {
resolve(results);
}
} else {
Promise.cast(entry).then(fulfilledTo(property), onRejection);
}
}
});
};
});
define("rsvp/instrument",
["./config","./utils","exports"],
function(__dependency1__, __dependency2__, __exports__) {
"use strict";
var config = __dependency1__.config;
var now = __dependency2__.now;
__exports__["default"] = function instrument(eventName, promise, child) {
// instrumentation should not disrupt normal usage.
try {
config.trigger(eventName, {
guid: promise._guidKey + promise._id,
eventName: eventName,
detail: promise._detail,
childGuid: child && promise._guidKey + child._id,
label: promise._label,
timeStamp: now(),
stack: new Error(promise._label).stack
});
} catch(error) {
setTimeout(function(){
throw error;
}, 0);
}
};
});
define("rsvp/map",
["./promise","./all","./utils","exports"],
function(__dependency1__, __dependency2__, __dependency3__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
var all = __dependency2__["default"];
var isArray = __dependency3__.isArray;
var isFunction = __dependency3__.isFunction;
/**
`RSVP.map` is similar to JavaScript's native `map` method, except that it
waits for all promises to become fulfilled before running the `mapFn` on
each item in given to `promises`. `RSVP.map` returns a promise that will
become fulfilled with the result of running `mapFn` on the values the promises
become fulfilled with.
For example:
```javascript
var promise1 = RSVP.resolve(1);
var promise2 = RSVP.resolve(2);
var promise3 = RSVP.resolve(3);
var promises = [ promise1, promise2, promise3 ];
var mapFn = function(item){
return item + 1;
};
RSVP.map(promises, mapFn).then(function(result){
// result is [ 2, 3, 4 ]
});
```
If any of the `promises` given to `RSVP.map` are rejected, the first promise
that is rejected will be given as an argument to the returned promises's
rejection handler. For example:
```javascript
var promise1 = RSVP.resolve(1);
var promise2 = RSVP.reject(new Error("2"));
var promise3 = RSVP.reject(new Error("3"));
var promises = [ promise1, promise2, promise3 ];
var mapFn = function(item){
return item + 1;
};
RSVP.map(promises, mapFn).then(function(array){
// Code here never runs because there are rejected promises!
}, function(reason) {
// reason.message === "2"
});
```
`RSVP.map` will also wait if a promise is returned from `mapFn`. For example,
say you want to get all comments from a set of blog posts, but you need
the blog posts first becuase they contain a url to those comments.
```javscript
var mapFn = function(blogPost){
// getComments does some ajax and returns an RSVP.Promise that is fulfilled
// with some comments data
return getComments(blogPost.comments_url);
};
// getBlogPosts does some ajax and returns an RSVP.Promise that is fulfilled
// with some blog post data
RSVP.map(getBlogPosts(), mapFn).then(function(comments){
// comments is the result of asking the server for the comments
// of all blog posts returned from getBlogPosts()
});
```
@method map
@for RSVP
@param {Array} promises
@param {Function} mapFn function to be called on each fulfilled promise.
@param {String} label optional string for labeling the promise.
Useful for tooling.
@return {Promise} promise that is fulfilled with the result of calling
`mapFn` on each fulfilled promise or value when they become fulfilled.
The promise will be rejected if any of the given `promises` become rejected.
*/
__exports__["default"] = function map(promises, mapFn, label) {
if (!isArray(promises)) {
throw new TypeError('You must pass an array to map.');
}
if (!isFunction(mapFn)){
throw new TypeError("You must pass a function to map's second argument.");
}
return all(promises, label).then(function(results){
var resultLen = results.length,
mappedResults = [],
i;
for (i = 0; i < resultLen; i++){
mappedResults.push(mapFn(results[i]));
}
return all(mappedResults, label);
});
};
});
define("rsvp/node",
["./promise","exports"],
function(__dependency1__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
var slice = Array.prototype.slice;
function makeNodeCallbackFor(resolve, reject) {
return function (error, value) {
if (error) {
reject(error);
} else if (arguments.length > 2) {
resolve(slice.call(arguments, 1));
} else {
resolve(value);
}
};
}
/**
`RSVP.denodeify` takes a "node-style" function and returns a function that
will return an `RSVP.Promise`. You can use `denodeify` in Node.js or the
browser when you'd prefer to use promises over using callbacks. For example,
`denodeify` transforms the following:
```javascript
var fs = require('fs');
fs.readFile('myfile.txt', function(err, data){
if (err) return handleError(err);
handleData(data);
});
```
into:
```javascript
var fs = require('fs');
var readFile = RSVP.denodeify(fs.readFile);
readFile('myfile.txt').then(handleData, handleError);
```
Using `denodeify` makes it easier to compose asynchronous operations instead
of using callbacks. For example, instead of:
```javascript
var fs = require('fs');
var log = require('some-async-logger');
fs.readFile('myfile.txt', function(err, data){
if (err) return handleError(err);
fs.writeFile('myfile2.txt', data, function(err){
if (err) throw err;
log('success', function(err) {
if (err) throw err;
});
});
});
```
You can chain the operations together using `then` from the returned promise:
```javascript
var fs = require('fs');
var denodeify = RSVP.denodeify;
var readFile = denodeify(fs.readFile);
var writeFile = denodeify(fs.writeFile);
var log = denodeify(require('some-async-logger'));
readFile('myfile.txt').then(function(data){
return writeFile('myfile2.txt', data);
}).then(function(){
return log('SUCCESS');
}).then(function(){
// success handler
}, function(reason){
// rejection handler
});
```
@method denodeify
@for RSVP
@param {Function} nodeFunc a "node-style" function that takes a callback as
its last argument. The callback expects an error to be passed as its first
argument (if an error occurred, otherwise null), and the value from the
operation as its second argument ("function(err, value){ }").
@param {Any} binding optional argument for binding the "this" value when
calling the `nodeFunc` function.
@return {Function} a function that wraps `nodeFunc` to return an
`RSVP.Promise`
*/
__exports__["default"] = function denodeify(nodeFunc, binding) {
return function() {
var nodeArgs = slice.call(arguments), resolve, reject;
var thisArg = this || binding;
return new Promise(function(resolve, reject) {
Promise.all(nodeArgs).then(function(nodeArgs) {
try {
nodeArgs.push(makeNodeCallbackFor(resolve, reject));
nodeFunc.apply(thisArg, nodeArgs);
} catch(e) {
reject(e);
}
});
});
};
};
});
define("rsvp/promise",
["./config","./events","./instrument","./utils","./promise/cast","./promise/all","./promise/race","./promise/resolve","./promise/reject","exports"],
function(__dependency1__, __dependency2__, __dependency3__, __dependency4__, __dependency5__, __dependency6__, __dependency7__, __dependency8__, __dependency9__, __exports__) {
"use strict";
var config = __dependency1__.config;
var EventTarget = __dependency2__["default"];
var instrument = __dependency3__["default"];
var objectOrFunction = __dependency4__.objectOrFunction;
var isFunction = __dependency4__.isFunction;
var now = __dependency4__.now;
var cast = __dependency5__["default"];
var all = __dependency6__["default"];
var race = __dependency7__["default"];
var Resolve = __dependency8__["default"];
var Reject = __dependency9__["default"];
var guidKey = 'rsvp_' + now() + '-';
var counter = 0;
function noop() {}
__exports__["default"] = Promise;
/**
Promise objects represent the eventual result of an asynchronous operation. The
primary way of interacting with a promise is through its `then` method, which
registers callbacks to receive either a promise’s eventual value or the reason
why the promise cannot be fulfilled.
Terminology
-----------
- `promise` is an object or function with a `then` method whose behavior conforms to this specification.
- `thenable` is an object or function that defines a `then` method.
- `value` is any legal JavaScript value (including undefined, a thenable, or a promise).
- `exception` is a value that is thrown using the throw statement.
- `reason` is a value that indicates why a promise was rejected.
- `settled` the final resting state of a promise, fulfilled or rejected.
A promise can be in one of three states: pending, fulfilled, or rejected.
Basic Usage:
------------
```js
var promise = new Promise(function(resolve, reject) {
// on success
resolve(value);
// on failure
reject(reason);
});
promise.then(function(value) {
// on fulfillment
}, function(reason) {
// on rejection
});
```
Advanced Usage:
---------------
Promises shine when abstracting away asynchronous interactions such as
`XMLHttpRequest`s.
```js
function getJSON(url) {
return new Promise(function(resolve, reject){
var xhr = new XMLHttpRequest();
xhr.open('GET', url);
xhr.onreadystatechange = handler;
xhr.responseType = 'json';
xhr.setRequestHeader('Accept', 'application/json');
xhr.send();
function handler() {
if (this.readyState === this.DONE) {
if (this.status === 200) {
resolve(this.response);
} else {
reject(new Error("getJSON: `" + url + "` failed with status: [" + this.status + "]");
}
}
};
});
}
getJSON('/posts.json').then(function(json) {
// on fulfillment
}, function(reason) {
// on rejection
});
```
Unlike callbacks, promises are great composable primitives.
```js
Promise.all([
getJSON('/posts'),
getJSON('/comments')
]).then(function(values){
values[0] // => postsJSON
values[1] // => commentsJSON
return values;
});
```
@class Promise
@param {function}
@param {String} label optional string for labeling the promise.
Useful for tooling.
@constructor
*/
function Promise(resolver, label) {
if (!isFunction(resolver)) {
throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');
}
if (!(this instanceof Promise)) {
throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.");
}
this._id = counter++;
this._label = label;
this._subscribers = [];
if (config.instrument) {
instrument('created', this);
}
if (noop !== resolver) {
invokeResolver(resolver, this);
}
}
function invokeResolver(resolver, promise) {
function resolvePromise(value) {
resolve(promise, value);
}
function rejectPromise(reason) {
reject(promise, reason);
}
try {
resolver(resolvePromise, rejectPromise);
} catch(e) {
rejectPromise(e);
}
}
Promise.cast = cast;
Promise.all = all;
Promise.race = race;
Promise.resolve = Resolve;
Promise.reject = Reject;
var PENDING = void 0;
var SEALED = 0;
var FULFILLED = 1;
var REJECTED = 2;
function subscribe(parent, child, onFulfillment, onRejection) {
var subscribers = parent._subscribers;
var length = subscribers.length;
subscribers[length] = child;
subscribers[length + FULFILLED] = onFulfillment;
subscribers[length + REJECTED] = onRejection;
}
function publish(promise, settled) {
var child, callback, subscribers = promise._subscribers, detail = promise._detail;
if (config.instrument) {
instrument(settled === FULFILLED ? 'fulfilled' : 'rejected', promise);
}
for (var i = 0; i < subscribers.length; i += 3) {
child = subscribers[i];
callback = subscribers[i + settled];
invokeCallback(settled, child, callback, detail);
}
promise._subscribers = null;
}
Promise.prototype = {
/**
@property constructor
*/
constructor: Promise,
_id: undefined,
_guidKey: guidKey,
_label: undefined,
_state: undefined,
_detail: undefined,
_subscribers: undefined,
_onerror: function (reason) {
config.trigger('error', reason);
},
/**
A promise represents the eventual result of an asynchronous operation. The
primary way of interacting with a promise is through its `then` method, which
registers callbacks to receive either a promise's eventual value or the reason
why the promise cannot be fulfilled.
```js
findUser().then(function(user){
// user is available
}, function(reason){
// user is unavailable, and you are given the reason why
});
```
Chaining
--------
The return value of `then` is itself a promise. This second, "downstream"
promise is resolved with the return value of the first promise's fulfillment
or rejection handler, or rejected if the handler throws an exception.
```js
findUser().then(function (user) {
return user.name;
}, function (reason) {
return "default name";
}).then(function (userName) {
// If `findUser` fulfilled, `userName` will be the user's name, otherwise it
// will be `"default name"`
});
findUser().then(function (user) {
throw "Found user, but still unhappy";
}, function (reason) {
throw "`findUser` rejected and we're unhappy";
}).then(function (value) {
// never reached
}, function (reason) {
// if `findUser` fulfilled, `reason` will be "Found user, but still unhappy".
// If `findUser` rejected, `reason` will be "`findUser` rejected and we're unhappy".
});
```
If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.
```js
findUser().then(function (user) {
throw new PedagogicalException("Upstream error");
}).then(function (value) {
// never reached
}).then(function (value) {
// never reached
}, function (reason) {
// The `PedgagocialException` is propagated all the way down to here
});
```
Assimilation
------------
Sometimes the value you want to propagate to a downstream promise can only be
retrieved asynchronously. This can be achieved by returning a promise in the
fulfillment or rejection handler. The downstream promise will then be pending
until the returned promise is settled. This is called *assimilation*.
```js
findUser().then(function (user) {
return findCommentsByAuthor(user);
}).then(function (comments) {
// The user's comments are now available
});
```
If the assimliated promise rejects, then the downstream promise will also reject.
```js
findUser().then(function (user) {
return findCommentsByAuthor(user);
}).then(function (comments) {
// If `findCommentsByAuthor` fulfills, we'll have the value here
}, function (reason) {
// If `findCommentsByAuthor` rejects, we'll have the reason here
});
```
Simple Example
--------------
Synchronous Example
```javascript
var result;
try {
result = findResult();
// success
} catch(reason) {
// failure
}
```
Errback Example
```js
findResult(function(result, err){
if (err) {
// failure
} else {
// success
}
});
```
Promise Example;
```javacsript
findResult().then(function(result){
}, function(reason){
});
```
Advanced Example
--------------
Synchronous Example
```javascript
var author, books;
try {
author = findAuthor();
books = findBooksByAuthor(author);
// success
} catch(reason) {
// failure
}
```
Errback Example
```js
function foundBooks(books) {
}
function failure(reason) {
}
findAuthor(function(author, err){
if (err) {
failure(err);
// failure
} else {
try {
findBoooksByAuthor(author, function(books, err) {
if (err) {
failure(err);
} else {
try {
foundBooks(books);
} catch(reason) {
failure(reason);
}
}
});
} catch(error) {
failure(err);
}
// success
}
});
```
Promise Example;
```javacsript
findAuthor().
then(findBooksByAuthor).
then(function(books){
// found books
}).catch(function(reason){
// something went wrong;
});
```
@method then
@param {Function} onFulfillment
@param {Function} onRejection
@param {String} label optional string for labeling the promise.
Useful for tooling.
@return {Promise}
*/
then: function(onFulfillment, onRejection, label) {
var promise = this;
this._onerror = null;
var thenPromise = new this.constructor(noop, label);
if (this._state) {
var callbacks = arguments;
config.async(function invokePromiseCallback() {
invokeCallback(promise._state, thenPromise, callbacks[promise._state - 1], promise._detail);
});
} else {
subscribe(this, thenPromise, onFulfillment, onRejection);
}
if (config.instrument) {
instrument('chained', promise, thenPromise);
}
return thenPromise;
},
/**
`catch` is simply sugar for `then(null, onRejection)` which makes it the same
as the catch block, of a try/catch statement.
```js
function findAuthor(){
throw new Error("couldn't find that author");
}
// synchronous
try {
findAuthor();
} catch(reason) {
}
// async with promises
findAuthor().catch(function(reason){
// something went wrong;
});
```
@method catch
@param {Function} onRejection
@param {String} label optional string for labeling the promise.
Useful for tooling.
@return {Promise}
*/
'catch': function(onRejection, label) {
return this.then(null, onRejection, label);
},
/**
`finally` will be invoked regardless of the promise's fate just as native
try/catch/finally behaves
```js
findAuthor() {
if (Math.random() > 0.5) {
throw new Error();
}
return new Author();
}
try {
return findAuthor(); // succeed or fail
} catch(error) {
return findOtherAuther();
} finally {
// always runs
// doesn't effect the return value
}
findAuthor().finally(function(){
// author was either found, or not
});
```
@method finally
@param {Function} callback
@param {String} label optional string for labeling the promise.
Useful for tooling.
@return {Promise}
*/
'finally': function(callback, label) {
var constructor = this.constructor;
return this.then(function(value) {
return constructor.cast(callback()).then(function(){
return value;
});
}, function(reason) {
return constructor.cast(callback()).then(function(){
throw reason;
});
}, label);
}
};
function invokeCallback(settled, promise, callback, detail) {
var hasCallback = isFunction(callback),
value, error, succeeded, failed;
if (hasCallback) {
try {
value = callback(detail);
succeeded = true;
} catch(e) {
failed = true;
error = e;
}
} else {
value = detail;
succeeded = true;
}
if (handleThenable(promise, value)) {
return;
} else if (hasCallback && succeeded) {
resolve(promise, value);
} else if (failed) {
reject(promise, error);
} else if (settled === FULFILLED) {
resolve(promise, value);
} else if (settled === REJECTED) {
reject(promise, value);
}
}
function handleThenable(promise, value) {
var then = null,
resolved;
try {
if (promise === value) {
throw new TypeError("A promises callback cannot return that same promise.");
}
if (objectOrFunction(value)) {
then = value.then;
if (isFunction(then)) {
then.call(value, function(val) {
if (resolved) { return true; }
resolved = true;
if (value !== val) {
resolve(promise, val);
} else {
fulfill(promise, val);
}
}, function(val) {
if (resolved) { return true; }
resolved = true;
reject(promise, val);
}, 'derived from: ' + (promise._label || ' unknown promise'));
return true;
}
}
} catch (error) {
if (resolved) { return true; }
reject(promise, error);
return true;
}
return false;
}
function resolve(promise, value) {
if (promise === value) {
fulfill(promise, value);
} else if (!handleThenable(promise, value)) {
fulfill(promise, value);
}
}
function fulfill(promise, value) {
if (promise._state !== PENDING) { return; }
promise._state = SEALED;
promise._detail = value;
config.async(publishFulfillment, promise);
}
function reject(promise, reason) {
if (promise._state !== PENDING) { return; }
promise._state = SEALED;
promise._detail = reason;
config.async(publishRejection, promise);
}
function publishFulfillment(promise) {
publish(promise, promise._state = FULFILLED);
}
function publishRejection(promise) {
if (promise._onerror) {
promise._onerror(promise._detail);
}
publish(promise, promise._state = REJECTED);
}
});
define("rsvp/promise/all",
["../utils","exports"],
function(__dependency1__, __exports__) {
"use strict";
var isArray = __dependency1__.isArray;
var isNonThenable = __dependency1__.isNonThenable;
/**
`RSVP.Promise.all` returns a new promise which is fulfilled with an array of
fulfillment values for the passed promises, or rejects with the reason of the
first passed promise that rejects. It casts all elements of the passed iterable
to promises as it runs this algorithm.
Example:
```javascript
var promise1 = RSVP.resolve(1);
var promise2 = RSVP.resolve(2);
var promise3 = RSVP.resolve(3);
var promises = [ promise1, promise2, promise3 ];
RSVP.Promise.all(promises).then(function(array){
// The array here would be [ 1, 2, 3 ];
});
```
If any of the `promises` given to `RSVP.all` are rejected, the first promise
that is rejected will be given as an argument to the returned promises's
rejection handler. For example:
Example:
```javascript
var promise1 = RSVP.resolve(1);
var promise2 = RSVP.reject(new Error("2"));
var promise3 = RSVP.reject(new Error("3"));
var promises = [ promise1, promise2, promise3 ];
RSVP.Promise.all(promises).then(function(array){
// Code here never runs because there are rejected promises!
}, function(error) {
// error.message === "2"
});
```
@method all
@for RSVP.Promise
@param {Array} promises
@param {String} label optional string for labeling the promise.
Useful for tooling.
@return {Promise} promise that is fulfilled when all `promises` have been
fulfilled, or rejected if any of them become rejected.
*/
__exports__["default"] = function all(entries, label) {
/*jshint validthis:true */
var Constructor = this;
return new Constructor(function(resolve, reject) {
if (!isArray(entries)) {
throw new TypeError('You must pass an array to all.');
}
var remaining = entries.length;
var results = new Array(remaining);
var entry, pending = true;
if (remaining === 0) {
resolve(results);
return;
}
function fulfillmentAt(index) {
return function(value) {
results[index] = value;
if (--remaining === 0) {
resolve(results);
}
};
}
function onRejection(reason) {
remaining = 0;
reject(reason);
}
for (var index = 0; index < entries.length; index++) {
entry = entries[index];
if (isNonThenable(entry)) {
results[index] = entry;
if (--remaining === 0) {
resolve(results);
}
} else {
Constructor.cast(entry).then(fulfillmentAt(index), onRejection);
}
}
}, label);
};
});
define("rsvp/promise/cast",
["exports"],
function(__exports__) {
"use strict";
/**
`RSVP.Promise.cast` cast coerces its argument to a promise, or returns the
argument if it is already a promise which shares a constructor with the caster;
Example:
```javascript
var promise = RSVP.Promise.resolve(1);
var casted = RSVP.Promise.cast(promise);
console.log(promise === casted); // true
```
In the case of a promise whose constructor does not match, it is assimilated.
The resulting promise will fulfill or reject based on the outcome of the
promise being casted.
In the case of a non-promise, a promise which will fulfill with that value is
returned.
Example:
```javascript
var value = 1; // could be a number, boolean, string, undefined...
var casted = RSVP.Promise.cast(value);
console.log(value === casted); // false
console.log(casted instanceof RSVP.Promise) // true
casted.then(function(val) {
val === value // => true
});
```
`RSVP.Promise.cast` is similar to `RSVP.Promise.resolve`, but `RSVP.Promise.cast` differs in the
following ways:
* `RSVP.Promise.cast` serves as a memory-efficient way of getting a promise, when you
have something that could either be a promise or a value. RSVP.resolve
will have the same effect but will create a new promise wrapper if the
argument is a promise.
* `RSVP.Promise.cast` is a way of casting incoming thenables or promise subclasses to
promises of the exact class specified, so that the resulting object's `then` is
ensured to have the behavior of the constructor you are calling cast on (i.e., RSVP.Promise).
@method cast
@for RSVP.Promise
@param {Object} object to be casted
@param {String} label optional string for labeling the promise.
Useful for tooling.
@return {Promise} promise
*/
__exports__["default"] = function cast(object, label) {
/*jshint validthis:true */
var Constructor = this;
if (object && typeof object === 'object' && object.constructor === Constructor) {
return object;
}
return new Constructor(function(resolve) {
resolve(object);
}, label);
};
});
define("rsvp/promise/race",
["../utils","exports"],
function(__dependency1__, __exports__) {
"use strict";
/* global toString */
var isArray = __dependency1__.isArray;
var isFunction = __dependency1__.isFunction;
var isNonThenable = __dependency1__.isNonThenable;
/**
`RSVP.Promise.race` returns a new promise which is settled in the same way as the
first passed promise to settle.
Example:
```javascript
var promise1 = new RSVP.Promise(function(resolve, reject){
setTimeout(function(){
resolve("promise 1");
}, 200);
});
var promise2 = new RSVP.Promise(function(resolve, reject){
setTimeout(function(){
resolve("promise 2");
}, 100);
});
RSVP.Promise.race([promise1, promise2]).then(function(result){
// result === "promise 2" because it was resolved before promise1
// was resolved.
});
```
`RSVP.Promise.race` is deterministic in that only the state of the first
completed promise matters. For example, even if other promises given to the
`promises` array argument are resolved, but the first completed promise has
become rejected before the other promises became fulfilled, the returned
promise will become rejected:
```javascript
var promise1 = new RSVP.Promise(function(resolve, reject){
setTimeout(function(){
resolve("promise 1");
}, 200);
});
var promise2 = new RSVP.Promise(function(resolve, reject){
setTimeout(function(){
reject(new Error("promise 2"));
}, 100);
});
RSVP.Promise.race([promise1, promise2]).then(function(result){
// Code here never runs because there are rejected promises!
}, function(reason){
// reason.message === "promise2" because promise 2 became rejected before
// promise 1 became fulfilled
});
```
@method race
@for RSVP.Promise
@param {Array} promises array of promises to observe
@param {String} label optional string for describing the promise returned.
Useful for tooling.
@return {Promise} a promise which settles in the same way as the first passed
promise to settle.
*/
__exports__["default"] = function race(entries, label) {
/*jshint validthis:true */
var Constructor = this, entry;
return new Constructor(function(resolve, reject) {
if (!isArray(entries)) {
throw new TypeError('You must pass an array to race.');
}
var pending = true;
function onFulfillment(value) { if (pending) { pending = false; resolve(value); } }
function onRejection(reason) { if (pending) { pending = false; reject(reason); } }
for (var i = 0; i < entries.length; i++) {
entry = entries[i];
if (isNonThenable(entry)) {
pending = false;
resolve(entry);
return;
} else {
Constructor.cast(entry).then(onFulfillment, onRejection);
}
}
}, label);
};
});
define("rsvp/promise/reject",
["exports"],
function(__exports__) {
"use strict";
/**
`RSVP.Promise.reject` returns a promise rejected with the passed `reason`.
It is essentially shorthand for the following:
```javascript
var promise = new RSVP.Promise(function(resolve, reject){
reject(new Error('WHOOPS'));
});
promise.then(function(value){
// Code here doesn't run because the promise is rejected!
}, function(reason){
// reason.message === 'WHOOPS'
});
```
Instead of writing the above, your code now simply becomes the following:
```javascript
var promise = RSVP.Promise.reject(new Error('WHOOPS'));
promise.then(function(value){
// Code here doesn't run because the promise is rejected!
}, function(reason){
// reason.message === 'WHOOPS'
});
```
@method reject
@for RSVP.Promise
@param {Any} reason value that the returned promise will be rejected with.
@param {String} label optional string for identifying the returned promise.
Useful for tooling.
@return {Promise} a promise rejected with the given `reason`.
*/
__exports__["default"] = function reject(reason, label) {
/*jshint validthis:true */
var Constructor = this;
return new Constructor(function (resolve, reject) {
reject(reason);
}, label);
};
});
define("rsvp/promise/resolve",
["exports"],
function(__exports__) {
"use strict";
/**
`RSVP.Promise.resolve` returns a promise that will become fulfilled with the passed
`value`. It is essentially shorthand for the following:
```javascript
var promise = new RSVP.Promise(function(resolve, reject){
resolve(1);
});
promise.then(function(value){
// value === 1
});
```
Instead of writing the above, your code now simply becomes the following:
```javascript
var promise = RSVP.Promise.resolve(1);
promise.then(function(value){
// value === 1
});
```
@method resolve
@for RSVP.Promise
@param {Any} value value that the returned promise will be resolved with
@param {String} label optional string for identifying the returned promise.
Useful for tooling.
@return {Promise} a promise that will become fulfilled with the given
`value`
*/
__exports__["default"] = function resolve(value, label) {
/*jshint validthis:true */
var Constructor = this;
return new Constructor(function(resolve, reject) {
resolve(value);
}, label);
};
});
define("rsvp/race",
["./promise","exports"],
function(__dependency1__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
__exports__["default"] = function race(array, label) {
return Promise.race(array, label);
};
});
define("rsvp/reject",
["./promise","exports"],
function(__dependency1__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
__exports__["default"] = function reject(reason, label) {
return Promise.reject(reason, label);
};
});
define("rsvp/resolve",
["./promise","exports"],
function(__dependency1__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
__exports__["default"] = function resolve(value, label) {
return Promise.resolve(value, label);
};
});
define("rsvp/rethrow",
["exports"],
function(__exports__) {
"use strict";
/**
`RSVP.rethrow` will rethrow an error on the next turn of the JavaScript event
loop in order to aid debugging.
Promises A+ specifies that any exceptions that occur with a promise must be
caught by the promises implementation and bubbled to the last handler. For
this reason, it is recommended that you always specify a second rejection
handler function to `then`. However, `RSVP.rethrow` will throw the exception
outside of the promise, so it bubbles up to your console if in the browser,
or domain/cause uncaught exception in Node. `rethrow` will throw the error
again so the error can be handled by the promise.
```javascript
function throws(){
throw new Error('Whoops!');
}
var promise = new RSVP.Promise(function(resolve, reject){
throws();
});
promise.catch(RSVP.rethrow).then(function(){
// Code here doesn't run because the promise became rejected due to an
// error!
}, function (err){
// handle the error here
});
```
The 'Whoops' error will be thrown on the next turn of the event loop
and you can watch for it in your console. You can also handle it using a
rejection handler given to `.then` or `.catch` on the returned promise.
@method rethrow
@for RSVP
@param {Error} reason reason the promise became rejected.
@throws Error
*/
__exports__["default"] = function rethrow(reason) {
setTimeout(function() {
throw reason;
});
throw reason;
};
});
define("rsvp/utils",
["exports"],
function(__exports__) {
"use strict";
function objectOrFunction(x) {
return typeof x === "function" || (typeof x === "object" && x !== null);
}
__exports__.objectOrFunction = objectOrFunction;function isFunction(x) {
return typeof x === "function";
}
__exports__.isFunction = isFunction;function isNonThenable(x) {
return !objectOrFunction(x);
}
__exports__.isNonThenable = isNonThenable;function isArray(x) {
return Object.prototype.toString.call(x) === "[object Array]";
}
__exports__.isArray = isArray;// Date.now is not available in browsers < IE9
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/now#Compatibility
var now = Date.now || function() { return new Date().getTime(); };
__exports__.now = now;
var keysOf = Object.keys || function(object) {
var result = [];
for (var prop in object) {
result.push(prop);
}
return result;
};
__exports__.keysOf = keysOf;
});
define("rsvp",
["./rsvp/promise","./rsvp/events","./rsvp/node","./rsvp/all","./rsvp/all_settled","./rsvp/race","./rsvp/hash","./rsvp/rethrow","./rsvp/defer","./rsvp/config","./rsvp/map","./rsvp/resolve","./rsvp/reject","./rsvp/asap","./rsvp/filter","exports"],
function(__dependency1__, __dependency2__, __dependency3__, __dependency4__, __dependency5__, __dependency6__, __dependency7__, __dependency8__, __dependency9__, __dependency10__, __dependency11__, __dependency12__, __dependency13__, __dependency14__, __dependency15__, __exports__) {
"use strict";
var Promise = __dependency1__["default"];
var EventTarget = __dependency2__["default"];
var denodeify = __dependency3__["default"];
var all = __dependency4__["default"];
var allSettled = __dependency5__["default"];
var race = __dependency6__["default"];
var hash = __dependency7__["default"];
var rethrow = __dependency8__["default"];
var defer = __dependency9__["default"];
var config = __dependency10__.config;
var configure = __dependency10__.configure;
var map = __dependency11__["default"];
var resolve = __dependency12__["default"];
var reject = __dependency13__["default"];
var asap = __dependency14__["default"];
var filter = __dependency15__["default"];
config.async = asap; // default async is asap;
function async(callback, arg) {
config.async(callback, arg);
}
function on() {
config.on.apply(config, arguments);
}
function off() {
config.off.apply(config, arguments);
}
// Set up instrumentation through `window.__PROMISE_INTRUMENTATION__`
if (typeof window !== 'undefined' && typeof window.__PROMISE_INSTRUMENTATION__ === 'object') {
var callbacks = window.__PROMISE_INSTRUMENTATION__;
configure('instrument', true);
for (var eventName in callbacks) {
if (callbacks.hasOwnProperty(eventName)) {
on(eventName, callbacks[eventName]);
}
}
}
__exports__.Promise = Promise;
__exports__.EventTarget = EventTarget;
__exports__.all = all;
__exports__.allSettled = allSettled;
__exports__.race = race;
__exports__.hash = hash;
__exports__.rethrow = rethrow;
__exports__.defer = defer;
__exports__.denodeify = denodeify;
__exports__.configure = configure;
__exports__.on = on;
__exports__.off = off;
__exports__.resolve = resolve;
__exports__.reject = reject;
__exports__.async = async;
__exports__.map = map;
__exports__.filter = filter;
});
global.RSVP = requireModule('rsvp');
}(window));
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