libjs-es6-promise 3.2.2+ds-1 / usr / share / javascript / es6-promise / es6-promise.js

(function() {
    "use strict";

    function $$utils$$objectOrFunction(x) {
      return typeof x === 'function' || (typeof x === 'object' && x !== null);
    }

    function $$utils$$isFunction(x) {
      return typeof x === 'function';
    }

    function $$utils$$isMaybeThenable(x) {
      return typeof x === 'object' && x !== null;
    }

    var $$utils$$_isArray;
    if (!Array.isArray) {
      $$utils$$_isArray = function (x) {
        return Object.prototype.toString.call(x) === '[object Array]';
      };
    } else {
      $$utils$$_isArray = Array.isArray;
    }

    var $$utils$$isArray = $$utils$$_isArray;
    var $$asap$$len = 0;
    var $$asap$$vertxNext;
    var $$asap$$customSchedulerFn;

    var $$asap$$asap = function asap(callback, arg) {
      $$asap$$queue[$$asap$$len] = callback;
      $$asap$$queue[$$asap$$len + 1] = arg;
      $$asap$$len += 2;
      if ($$asap$$len === 2) {
        // If len is 2, 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.
        if ($$asap$$customSchedulerFn) {
          $$asap$$customSchedulerFn($$asap$$flush);
        } else {
          $$asap$$scheduleFlush();
        }
      }
    };

    function $$asap$$setScheduler(scheduleFn) {
      $$asap$$customSchedulerFn = scheduleFn;
    }

    function $$asap$$setAsap(asapFn) {
      $$asap$$asap = asapFn;
    }

    var $$asap$$browserWindow = (typeof window !== 'undefined') ? window : undefined;
    var $$asap$$browserGlobal = $$asap$$browserWindow || {};
    var $$asap$$BrowserMutationObserver = $$asap$$browserGlobal.MutationObserver || $$asap$$browserGlobal.WebKitMutationObserver;
    var $$asap$$isNode = typeof self === 'undefined' && typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';

    // test for web worker but not in IE10
    var $$asap$$isWorker = typeof Uint8ClampedArray !== 'undefined' &&
      typeof importScripts !== 'undefined' &&
      typeof MessageChannel !== 'undefined';

    // node
    function $$asap$$useNextTick() {
      // node version 0.10.x displays a deprecation warning when nextTick is used recursively
      // see https://github.com/cujojs/when/issues/410 for details
      return function() {
        process.nextTick($$asap$$flush);
      };
    }

    // vertx
    function $$asap$$useVertxTimer() {
      return function() {
        $$asap$$vertxNext($$asap$$flush);
      };
    }

    function $$asap$$useMutationObserver() {
      var iterations = 0;
      var observer = new $$asap$$BrowserMutationObserver($$asap$$flush);
      var node = document.createTextNode('');
      observer.observe(node, { characterData: true });

      return function() {
        node.data = (iterations = ++iterations % 2);
      };
    }

    // web worker
    function $$asap$$useMessageChannel() {
      var channel = new MessageChannel();
      channel.port1.onmessage = $$asap$$flush;
      return function () {
        channel.port2.postMessage(0);
      };
    }

    function $$asap$$useSetTimeout() {
      return function() {
        setTimeout($$asap$$flush, 1);
      };
    }

    var $$asap$$queue = new Array(1000);
    function $$asap$$flush() {
      for (var i = 0; i < $$asap$$len; i+=2) {
        var callback = $$asap$$queue[i];
        var arg = $$asap$$queue[i+1];

        callback(arg);

        $$asap$$queue[i] = undefined;
        $$asap$$queue[i+1] = undefined;
      }

      $$asap$$len = 0;
    }

    function $$asap$$attemptVertx() {
      try {
        var r = require;
        var vertx = r('vertx');
        $$asap$$vertxNext = vertx.runOnLoop || vertx.runOnContext;
        return $$asap$$useVertxTimer();
      } catch(e) {
        return $$asap$$useSetTimeout();
      }
    }

    var $$asap$$scheduleFlush;
    // Decide what async method to use to triggering processing of queued callbacks:
    if ($$asap$$isNode) {
      $$asap$$scheduleFlush = $$asap$$useNextTick();
    } else if ($$asap$$BrowserMutationObserver) {
      $$asap$$scheduleFlush = $$asap$$useMutationObserver();
    } else if ($$asap$$isWorker) {
      $$asap$$scheduleFlush = $$asap$$useMessageChannel();
    } else if ($$asap$$browserWindow === undefined && typeof require === 'function') {
      $$asap$$scheduleFlush = $$asap$$attemptVertx();
    } else {
      $$asap$$scheduleFlush = $$asap$$useSetTimeout();
    }

    function $$then$$then(onFulfillment, onRejection) {
      var parent = this;

      var child = new this.constructor($$$internal$$noop);

      if (child[$$$internal$$PROMISE_ID] === undefined) {
        $$$internal$$makePromise(child);
      }

      var state = parent._state;

      if (state) {
        var callback = arguments[state - 1];
        $$asap$$asap(function(){
          $$$internal$$invokeCallback(state, child, callback, parent._result);
        });
      } else {
        $$$internal$$subscribe(parent, child, onFulfillment, onRejection);
      }

      return child;
    }

    var $$then$$default = $$then$$then;

    function $$promise$resolve$$resolve(object) {
      /*jshint validthis:true */
      var Constructor = this;

      if (object && typeof object === 'object' && object.constructor === Constructor) {
        return object;
      }

      var promise = new Constructor($$$internal$$noop);
      $$$internal$$resolve(promise, object);
      return promise;
    }

    var $$promise$resolve$$default = $$promise$resolve$$resolve;
    var $$$internal$$PROMISE_ID = Math.random().toString(36).substring(16);

    function $$$internal$$noop() {}

    var $$$internal$$PENDING   = void 0;
    var $$$internal$$FULFILLED = 1;
    var $$$internal$$REJECTED  = 2;

    var $$$internal$$GET_THEN_ERROR = new $$$internal$$ErrorObject();

    function $$$internal$$selfFulfillment() {
      return new TypeError("You cannot resolve a promise with itself");
    }

    function $$$internal$$cannotReturnOwn() {
      return new TypeError('A promises callback cannot return that same promise.');
    }

    function $$$internal$$getThen(promise) {
      try {
        return promise.then;
      } catch(error) {
        $$$internal$$GET_THEN_ERROR.error = error;
        return $$$internal$$GET_THEN_ERROR;
      }
    }

    function $$$internal$$tryThen(then, value, fulfillmentHandler, rejectionHandler) {
      try {
        then.call(value, fulfillmentHandler, rejectionHandler);
      } catch(e) {
        return e;
      }
    }

    function $$$internal$$handleForeignThenable(promise, thenable, then) {
       $$asap$$asap(function(promise) {
        var sealed = false;
        var error = $$$internal$$tryThen(then, thenable, function(value) {
          if (sealed) { return; }
          sealed = true;
          if (thenable !== value) {
            $$$internal$$resolve(promise, value);
          } else {
            $$$internal$$fulfill(promise, value);
          }
        }, function(reason) {
          if (sealed) { return; }
          sealed = true;

          $$$internal$$reject(promise, reason);
        }, 'Settle: ' + (promise._label || ' unknown promise'));

        if (!sealed && error) {
          sealed = true;
          $$$internal$$reject(promise, error);
        }
      }, promise);
    }

    function $$$internal$$handleOwnThenable(promise, thenable) {
      if (thenable._state === $$$internal$$FULFILLED) {
        $$$internal$$fulfill(promise, thenable._result);
      } else if (thenable._state === $$$internal$$REJECTED) {
        $$$internal$$reject(promise, thenable._result);
      } else {
        $$$internal$$subscribe(thenable, undefined, function(value) {
          $$$internal$$resolve(promise, value);
        }, function(reason) {
          $$$internal$$reject(promise, reason);
        });
      }
    }

    function $$$internal$$handleMaybeThenable(promise, maybeThenable, then) {
      if (maybeThenable.constructor === promise.constructor &&
          then === $$then$$default &&
          constructor.resolve === $$promise$resolve$$default) {
        $$$internal$$handleOwnThenable(promise, maybeThenable);
      } else {
        if (then === $$$internal$$GET_THEN_ERROR) {
          $$$internal$$reject(promise, $$$internal$$GET_THEN_ERROR.error);
        } else if (then === undefined) {
          $$$internal$$fulfill(promise, maybeThenable);
        } else if ($$utils$$isFunction(then)) {
          $$$internal$$handleForeignThenable(promise, maybeThenable, then);
        } else {
          $$$internal$$fulfill(promise, maybeThenable);
        }
      }
    }

    function $$$internal$$resolve(promise, value) {
      if (promise === value) {
        $$$internal$$reject(promise, $$$internal$$selfFulfillment());
      } else if ($$utils$$objectOrFunction(value)) {
        $$$internal$$handleMaybeThenable(promise, value, $$$internal$$getThen(value));
      } else {
        $$$internal$$fulfill(promise, value);
      }
    }

    function $$$internal$$publishRejection(promise) {
      if (promise._onerror) {
        promise._onerror(promise._result);
      }

      $$$internal$$publish(promise);
    }

    function $$$internal$$fulfill(promise, value) {
      if (promise._state !== $$$internal$$PENDING) { return; }

      promise._result = value;
      promise._state = $$$internal$$FULFILLED;

      if (promise._subscribers.length !== 0) {
        $$asap$$asap($$$internal$$publish, promise);
      }
    }

    function $$$internal$$reject(promise, reason) {
      if (promise._state !== $$$internal$$PENDING) { return; }
      promise._state = $$$internal$$REJECTED;
      promise._result = reason;

      $$asap$$asap($$$internal$$publishRejection, promise);
    }

    function $$$internal$$subscribe(parent, child, onFulfillment, onRejection) {
      var subscribers = parent._subscribers;
      var length = subscribers.length;

      parent._onerror = null;

      subscribers[length] = child;
      subscribers[length + $$$internal$$FULFILLED] = onFulfillment;
      subscribers[length + $$$internal$$REJECTED]  = onRejection;

      if (length === 0 && parent._state) {
        $$asap$$asap($$$internal$$publish, parent);
      }
    }

    function $$$internal$$publish(promise) {
      var subscribers = promise._subscribers;
      var settled = promise._state;

      if (subscribers.length === 0) { return; }

      var child, callback, detail = promise._result;

      for (var i = 0; i < subscribers.length; i += 3) {
        child = subscribers[i];
        callback = subscribers[i + settled];

        if (child) {
          $$$internal$$invokeCallback(settled, child, callback, detail);
        } else {
          callback(detail);
        }
      }

      promise._subscribers.length = 0;
    }

    function $$$internal$$ErrorObject() {
      this.error = null;
    }

    var $$$internal$$TRY_CATCH_ERROR = new $$$internal$$ErrorObject();

    function $$$internal$$tryCatch(callback, detail) {
      try {
        return callback(detail);
      } catch(e) {
        $$$internal$$TRY_CATCH_ERROR.error = e;
        return $$$internal$$TRY_CATCH_ERROR;
      }
    }

    function $$$internal$$invokeCallback(settled, promise, callback, detail) {
      var hasCallback = $$utils$$isFunction(callback),
          value, error, succeeded, failed;

      if (hasCallback) {
        value = $$$internal$$tryCatch(callback, detail);

        if (value === $$$internal$$TRY_CATCH_ERROR) {
          failed = true;
          error = value.error;
          value = null;
        } else {
          succeeded = true;
        }

        if (promise === value) {
          $$$internal$$reject(promise, $$$internal$$cannotReturnOwn());
          return;
        }

      } else {
        value = detail;
        succeeded = true;
      }

      if (promise._state !== $$$internal$$PENDING) {
        // noop
      } else if (hasCallback && succeeded) {
        $$$internal$$resolve(promise, value);
      } else if (failed) {
        $$$internal$$reject(promise, error);
      } else if (settled === $$$internal$$FULFILLED) {
        $$$internal$$fulfill(promise, value);
      } else if (settled === $$$internal$$REJECTED) {
        $$$internal$$reject(promise, value);
      }
    }

    function $$$internal$$initializePromise(promise, resolver) {
      try {
        resolver(function resolvePromise(value){
          $$$internal$$resolve(promise, value);
        }, function rejectPromise(reason) {
          $$$internal$$reject(promise, reason);
        });
      } catch(e) {
        $$$internal$$reject(promise, e);
      }
    }

    var $$$internal$$id = 0;
    function $$$internal$$nextId() {
      return $$$internal$$id++;
    }

    function $$$internal$$makePromise(promise) {
      promise[$$$internal$$PROMISE_ID] = $$$internal$$id++;
      promise._state = undefined;
      promise._result = undefined;
      promise._subscribers = [];
    }

    var $$$enumerator$$default = $$$enumerator$$Enumerator;
    function $$$enumerator$$Enumerator(Constructor, input) {
      this._instanceConstructor = Constructor;
      this.promise = new Constructor($$$internal$$noop);

      if (!this.promise[$$$internal$$PROMISE_ID]) {
        $$$internal$$makePromise(this.promise);
      }

      if ($$utils$$isArray(input)) {
        this._input     = input;
        this.length     = input.length;
        this._remaining = input.length;

        this._result = new Array(this.length);

        if (this.length === 0) {
          $$$internal$$fulfill(this.promise, this._result);
        } else {
          this.length = this.length || 0;
          this._enumerate();
          if (this._remaining === 0) {
            $$$internal$$fulfill(this.promise, this._result);
          }
        }
      } else {
        $$$internal$$reject(this.promise, $$$enumerator$$validationError());
      }
    }

    function $$$enumerator$$validationError() {
      return new Error('Array Methods must be provided an Array');
    }

    $$$enumerator$$Enumerator.prototype._enumerate = function() {
      var length  = this.length;
      var input   = this._input;

      for (var i = 0; this._state === $$$internal$$PENDING && i < length; i++) {
        this._eachEntry(input[i], i);
      }
    };

    $$$enumerator$$Enumerator.prototype._eachEntry = function(entry, i) {
      var c = this._instanceConstructor;
      var resolve = c.resolve;

      if (resolve === $$promise$resolve$$default) {
        var then = $$$internal$$getThen(entry);

        if (then === $$then$$default &&
            entry._state !== $$$internal$$PENDING) {
          this._settledAt(entry._state, i, entry._result);
        } else if (typeof then !== 'function') {
          this._remaining--;
          this._result[i] = entry;
        } else if (c === $$es6$promise$promise$$default) {
          var promise = new c($$$internal$$noop);
          $$$internal$$handleMaybeThenable(promise, entry, then);
          this._willSettleAt(promise, i);
        } else {
          this._willSettleAt(new c(function(resolve) { resolve(entry); }), i);
        }
      } else {
        this._willSettleAt(resolve(entry), i);
      }
    };

    $$$enumerator$$Enumerator.prototype._settledAt = function(state, i, value) {
      var promise = this.promise;

      if (promise._state === $$$internal$$PENDING) {
        this._remaining--;

        if (state === $$$internal$$REJECTED) {
          $$$internal$$reject(promise, value);
        } else {
          this._result[i] = value;
        }
      }

      if (this._remaining === 0) {
        $$$internal$$fulfill(promise, this._result);
      }
    };

    $$$enumerator$$Enumerator.prototype._willSettleAt = function(promise, i) {
      var enumerator = this;

      $$$internal$$subscribe(promise, undefined, function(value) {
        enumerator._settledAt($$$internal$$FULFILLED, i, value);
      }, function(reason) {
        enumerator._settledAt($$$internal$$REJECTED, i, reason);
      });
    };

    function $$promise$all$$all(entries) {
      return new $$$enumerator$$default(this, entries).promise;
    }

    var $$promise$all$$default = $$promise$all$$all;

    function $$promise$race$$race(entries) {
      /*jshint validthis:true */
      var Constructor = this;

      if (!$$utils$$isArray(entries)) {
        return new Constructor(function(resolve, reject) {
          reject(new TypeError('You must pass an array to race.'));
        });
      } else {
        return new Constructor(function(resolve, reject) {
          var length = entries.length;
          for (var i = 0; i < length; i++) {
            Constructor.resolve(entries[i]).then(resolve, reject);
          }
        });
      }
    }

    var $$promise$race$$default = $$promise$race$$race;

    function $$promise$reject$$reject(reason) {
      /*jshint validthis:true */
      var Constructor = this;
      var promise = new Constructor($$$internal$$noop);
      $$$internal$$reject(promise, reason);
      return promise;
    }

    var $$promise$reject$$default = $$promise$reject$$reject;


    function $$es6$promise$promise$$needsResolver() {
      throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');
    }

    function $$es6$promise$promise$$needsNew() {
      throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.");
    }

    var $$es6$promise$promise$$default = $$es6$promise$promise$$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.

      Promises that are fulfilled have a fulfillment value and are in the fulfilled
      state.  Promises that are rejected have a rejection reason and are in the
      rejected state.  A fulfillment value is never a thenable.

      Promises can also be said to *resolve* a value.  If this value is also a
      promise, then the original promise's settled state will match the value's
      settled state.  So a promise that *resolves* a promise that rejects will
      itself reject, and a promise that *resolves* a promise that fulfills will
      itself fulfill.


      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} resolver
      Useful for tooling.
      @constructor
    */
    function $$es6$promise$promise$$Promise(resolver) {
      this[$$$internal$$PROMISE_ID] = $$$internal$$nextId();
      this._result = this._state = undefined;
      this._subscribers = [];

      if ($$$internal$$noop !== resolver) {
        typeof resolver !== 'function' && $$es6$promise$promise$$needsResolver();
        this instanceof $$es6$promise$promise$$Promise ? $$$internal$$initializePromise(this, resolver) : $$es6$promise$promise$$needsNew();
      }
    }

    $$es6$promise$promise$$Promise.all = $$promise$all$$default;
    $$es6$promise$promise$$Promise.race = $$promise$race$$default;
    $$es6$promise$promise$$Promise.resolve = $$promise$resolve$$default;
    $$es6$promise$promise$$Promise.reject = $$promise$reject$$default;
    $$es6$promise$promise$$Promise._setScheduler = $$asap$$setScheduler;
    $$es6$promise$promise$$Promise._setAsap = $$asap$$setAsap;
    $$es6$promise$promise$$Promise._asap = $$asap$$asap;

    $$es6$promise$promise$$Promise.prototype = {
      constructor: $$es6$promise$promise$$Promise,

    /**
      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 new Error('Found user, but still unhappy');
      }, function (reason) {
        throw new Error('`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;

      ```javascript
      findResult().then(function(result){
        // success
      }, function(reason){
        // failure
      });
      ```

      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;

      ```javascript
      findAuthor().
        then(findBooksByAuthor).
        then(function(books){
          // found books
      }).catch(function(reason){
        // something went wrong
      });
      ```

      @method then
      @param {Function} onFulfilled
      @param {Function} onRejected
      Useful for tooling.
      @return {Promise}
    */
      then: $$then$$default,

    /**
      `catch` is simply sugar for `then(undefined, 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) {
        // something went wrong
      }

      // async with promises
      findAuthor().catch(function(reason){
        // something went wrong
      });
      ```

      @method catch
      @param {Function} onRejection
      Useful for tooling.
      @return {Promise}
    */
      'catch': function(onRejection) {
        return this.then(null, onRejection);
      }
    };

    function $$es6$promise$polyfill$$polyfill() {
      var local;

      if (typeof global !== 'undefined') {
          local = global;
      } else if (typeof self !== 'undefined') {
          local = self;
      } else {
          try {
              local = Function('return this')();
          } catch (e) {
              throw new Error('polyfill failed because global object is unavailable in this environment');
          }
      }

      var P = local.Promise;

      if (P && Object.prototype.toString.call(P.resolve()) === '[object Promise]' && !P.cast) {
        return;
      }

      local.Promise = $$es6$promise$promise$$default;
    }

    var $$es6$promise$polyfill$$default = $$es6$promise$polyfill$$polyfill;

    var lib$es6$promise$umd$$ES6Promise = {
      'Promise': $$es6$promise$promise$$default,
      'polyfill': $$es6$promise$polyfill$$default
    };

    /* global define:true module:true window: true */
    if (typeof define === 'function' && define['amd']) {
      define(function() { return lib$es6$promise$umd$$ES6Promise; });
    } else if (typeof module !== 'undefined' && module['exports']) {
      module['exports'] = lib$es6$promise$umd$$ES6Promise;
    } else if (typeof this !== 'undefined') {
      this['ES6Promise'] = lib$es6$promise$umd$$ES6Promise;
    }

    $$es6$promise$polyfill$$default();
}).call(this);

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