node_modules/systemjs/dist/system-production.src.js

/*
    * SystemJS v0.21.3 Production
    */
(function () {
  'use strict';

  /*
   * Environment
   */
  var isBrowser = typeof window !== 'undefined' && typeof document !== 'undefined';
  var isNode = typeof process !== 'undefined' && process.versions && process.versions.node;
  var isWindows = typeof process !== 'undefined' && typeof process.platform === 'string' && process.platform.match(/^win/);

  var envGlobal = typeof self !== 'undefined' ? self : global;

  /*
   * Simple Symbol() shim
   */
  var hasSymbol = typeof Symbol !== 'undefined';
  function createSymbol (name) {
    return hasSymbol ? Symbol() : '@@' + name;
  }

  /*
   * Environment baseURI
   */
  var baseURI;

  // environent baseURI detection
  if (typeof document != 'undefined' && document.getElementsByTagName) {
    baseURI = document.baseURI;

    if (!baseURI) {
      var bases = document.getElementsByTagName('base');
      baseURI = bases[0] && bases[0].href || window.location.href;
    }
  }
  else if (typeof location != 'undefined') {
    baseURI = location.href;
  }

  // sanitize out the hash and querystring
  if (baseURI) {
    baseURI = baseURI.split('#')[0].split('?')[0];
    var slashIndex = baseURI.lastIndexOf('/');
    if (slashIndex !== -1)
      baseURI = baseURI.substr(0, slashIndex + 1);
  }
  else if (typeof process !== 'undefined' && process.cwd) {
    baseURI = 'file://' + (isWindows ? '/' : '') + process.cwd();
    if (isWindows)
      baseURI = baseURI.replace(/\\/g, '/');
  }
  else {
    throw new TypeError('No environment baseURI');
  }

  // ensure baseURI has trailing "/"
  if (baseURI[baseURI.length - 1] !== '/')
    baseURI += '/';

  /*
   * LoaderError with chaining for loader stacks
   */
  var errArgs = new Error(0, '_').fileName == '_';
  function LoaderError__Check_error_message_for_loader_stack (childErr, newMessage) {
    // Convert file:/// URLs to paths in Node
    if (!isBrowser)
      newMessage = newMessage.replace(isWindows ? /file:\/\/\//g : /file:\/\//g, '');

    var message = (childErr.message || childErr) + '\n  ' + newMessage;

    var err;
    if (errArgs && childErr.fileName)
      err = new Error(message, childErr.fileName, childErr.lineNumber);
    else
      err = new Error(message);


    var stack = childErr.originalErr ? childErr.originalErr.stack : childErr.stack;

    if (isNode)
      // node doesn't show the message otherwise
      err.stack = message + '\n  ' + stack;
    else
      err.stack = stack;

    err.originalErr = childErr.originalErr || childErr;

    return err;
  }

  /*
   * Optimized URL normalization assuming a syntax-valid URL parent
   */
  function throwResolveError (relUrl, parentUrl) {
    throw new RangeError('Unable to resolve "' + relUrl + '" to ' + parentUrl);
  }
  function resolveIfNotPlain (relUrl, parentUrl) {
    relUrl = relUrl.trim();
    var parentProtocol = parentUrl && parentUrl.substr(0, parentUrl.indexOf(':') + 1);

    var firstChar = relUrl[0];
    var secondChar = relUrl[1];

    // protocol-relative
    if (firstChar === '/' && secondChar === '/') {
      if (!parentProtocol)
        throwResolveError(relUrl, parentUrl);
      return parentProtocol + relUrl;
    }
    // relative-url
    else if (firstChar === '.' && (secondChar === '/' || secondChar === '.' && (relUrl[2] === '/' || relUrl.length === 2 && (relUrl += '/')) ||
        relUrl.length === 1  && (relUrl += '/')) ||
        firstChar === '/') {
      var parentIsPlain = !parentProtocol || parentUrl[parentProtocol.length] !== '/';

      // read pathname from parent if a URL
      // pathname taken to be part after leading "/"
      var pathname;
      if (parentIsPlain) {
        // resolving to a plain parent -> skip standard URL prefix, and treat entire parent as pathname
        if (parentUrl === undefined)
          throwResolveError(relUrl, parentUrl);
        pathname = parentUrl;
      }
      else if (parentUrl[parentProtocol.length + 1] === '/') {
        // resolving to a :// so we need to read out the auth and host
        if (parentProtocol !== 'file:') {
          pathname = parentUrl.substr(parentProtocol.length + 2);
          pathname = pathname.substr(pathname.indexOf('/') + 1);
        }
        else {
          pathname = parentUrl.substr(8);
        }
      }
      else {
        // resolving to :/ so pathname is the /... part
        pathname = parentUrl.substr(parentProtocol.length + 1);
      }

      if (firstChar === '/') {
        if (parentIsPlain)
          throwResolveError(relUrl, parentUrl);
        else
          return parentUrl.substr(0, parentUrl.length - pathname.length - 1) + relUrl;
      }

      // join together and split for removal of .. and . segments
      // looping the string instead of anything fancy for perf reasons
      // '../../../../../z' resolved to 'x/y' is just 'z' regardless of parentIsPlain
      var segmented = pathname.substr(0, pathname.lastIndexOf('/') + 1) + relUrl;

      var output = [];
      var segmentIndex = -1;

      for (var i = 0; i < segmented.length; i++) {
        // busy reading a segment - only terminate on '/'
        if (segmentIndex !== -1) {
          if (segmented[i] === '/') {
            output.push(segmented.substring(segmentIndex, i + 1));
            segmentIndex = -1;
          }
          continue;
        }

        // new segment - check if it is relative
        if (segmented[i] === '.') {
          // ../ segment
          if (segmented[i + 1] === '.' && (segmented[i + 2] === '/' || i + 2 === segmented.length)) {
            output.pop();
            i += 2;
          }
          // ./ segment
          else if (segmented[i + 1] === '/' || i + 1 === segmented.length) {
            i += 1;
          }
          else {
            // the start of a new segment as below
            segmentIndex = i;
            continue;
          }

          // this is the plain URI backtracking error (../, package:x -> error)
          if (parentIsPlain && output.length === 0)
            throwResolveError(relUrl, parentUrl);

          continue;
        }

        // it is the start of a new segment
        segmentIndex = i;
      }
      // finish reading out the last segment
      if (segmentIndex !== -1)
        output.push(segmented.substr(segmentIndex));

      return parentUrl.substr(0, parentUrl.length - pathname.length) + output.join('');
    }

    // sanitizes and verifies (by returning undefined if not a valid URL-like form)
    // Windows filepath compatibility is an added convenience here
    var protocolIndex = relUrl.indexOf(':');
    if (protocolIndex !== -1) {
      if (isNode) {
        // C:\x becomes file:///c:/x (we don't support C|\x)
        if (relUrl[1] === ':' && relUrl[2] === '\\' && relUrl[0].match(/[a-z]/i))
          return 'file:///' + relUrl.replace(/\\/g, '/');
      }
      return relUrl;
    }
  }

  var resolvedPromise = Promise.resolve();

  /*
   * Simple Array values shim
   */
  function arrayValues (arr) {
    if (arr.values)
      return arr.values();

    if (typeof Symbol === 'undefined' || !Symbol.iterator)
      throw new Error('Symbol.iterator not supported in this browser');

    var iterable = {};
    iterable[Symbol.iterator] = function () {
      var keys = Object.keys(arr);
      var keyIndex = 0;
      return {
        next: function () {
          if (keyIndex < keys.length)
            return {
              value: arr[keys[keyIndex++]],
              done: false
            };
          else
            return {
              value: undefined,
              done: true
            };
        }
      };
    };
    return iterable;
  }

  /*
   * 3. Reflect.Loader
   *
   * We skip the entire native internal pipeline, just providing the bare API
   */
  // 3.1.1
  function Loader () {
    this.registry = new Registry();
  }
  // 3.3.1
  Loader.prototype.constructor = Loader;

  function ensureInstantiated (module) {
    if (!(module instanceof ModuleNamespace))
      throw new TypeError('Module instantiation did not return a valid namespace object.');
    return module;
  }

  // 3.3.2
  Loader.prototype.import = function (key, parent) {
    if (typeof key !== 'string')
      throw new TypeError('Loader import method must be passed a module key string');
    // custom resolveInstantiate combined hook for better perf
    var loader = this;
    return resolvedPromise
    .then(function () {
      return loader[RESOLVE_INSTANTIATE](key, parent);
    })
    .then(ensureInstantiated)
    //.then(Module.evaluate)
    .catch(function (err) {
      throw LoaderError__Check_error_message_for_loader_stack(err, 'Loading ' + key + (parent ? ' from ' + parent : ''));
    });
  };
  // 3.3.3
  var RESOLVE = Loader.resolve = createSymbol('resolve');

  /*
   * Combined resolve / instantiate hook
   *
   * Not in current reduced spec, but necessary to separate RESOLVE from RESOLVE + INSTANTIATE as described
   * in the spec notes of this repo to ensure that loader.resolve doesn't instantiate when not wanted.
   *
   * We implement RESOLVE_INSTANTIATE as a single hook instead of a separate INSTANTIATE in order to avoid
   * the need for double registry lookups as a performance optimization.
   */
  var RESOLVE_INSTANTIATE = Loader.resolveInstantiate = createSymbol('resolveInstantiate');

  // default resolveInstantiate is just to call resolve and then get from the registry
  // this provides compatibility for the resolveInstantiate optimization
  Loader.prototype[RESOLVE_INSTANTIATE] = function (key, parent) {
    var loader = this;
    return loader.resolve(key, parent)
    .then(function (resolved) {
      return loader.registry.get(resolved);
    });
  };

  function ensureResolution (resolvedKey) {
    if (resolvedKey === undefined)
      throw new RangeError('No resolution found.');
    return resolvedKey;
  }

  Loader.prototype.resolve = function (key, parent) {
    var loader = this;
    return resolvedPromise
    .then(function() {
      return loader[RESOLVE](key, parent);
    })
    .then(ensureResolution)
    .catch(function (err) {
      throw LoaderError__Check_error_message_for_loader_stack(err, 'Resolving ' + key + (parent ? ' to ' + parent : ''));
    });
  };

  // 3.3.4 (import without evaluate)
  // this is not documented because the use of deferred evaluation as in Module.evaluate is not
  // documented, as it is not considered a stable feature to be encouraged
  // Loader.prototype.load may well be deprecated if this stays disabled
  /* Loader.prototype.load = function (key, parent) {
    return Promise.resolve(this[RESOLVE_INSTANTIATE](key, parent || this.key))
    .catch(function (err) {
      throw addToError(err, 'Loading ' + key + (parent ? ' from ' + parent : ''));
    });
  }; */

  /*
   * 4. Registry
   *
   * Instead of structuring through a Map, just use a dictionary object
   * We throw for construction attempts so this doesn't affect the public API
   *
   * Registry has been adjusted to use Namespace objects over ModuleStatus objects
   * as part of simplifying loader API implementation
   */
  var iteratorSupport = typeof Symbol !== 'undefined' && Symbol.iterator;
  var REGISTRY = createSymbol('registry');
  function Registry() {
    this[REGISTRY] = {};
  }
  // 4.4.1
  if (iteratorSupport) {
    // 4.4.2
    Registry.prototype[Symbol.iterator] = function () {
      return this.entries()[Symbol.iterator]();
    };

    // 4.4.3
    Registry.prototype.entries = function () {
      var registry = this[REGISTRY];
      return arrayValues(Object.keys(registry).map(function (key) {
        return [key, registry[key]];
      }));
    };
  }

  // 4.4.4
  Registry.prototype.keys = function () {
    return arrayValues(Object.keys(this[REGISTRY]));
  };
  // 4.4.5
  Registry.prototype.values = function () {
    var registry = this[REGISTRY];
    return arrayValues(Object.keys(registry).map(function (key) {
      return registry[key];
    }));
  };
  // 4.4.6
  Registry.prototype.get = function (key) {
    return this[REGISTRY][key];
  };
  // 4.4.7
  Registry.prototype.set = function (key, namespace) {
    if (!(namespace instanceof ModuleNamespace))
      throw new Error('Registry must be set with an instance of Module Namespace');
    this[REGISTRY][key] = namespace;
    return this;
  };
  // 4.4.8
  Registry.prototype.has = function (key) {
    return Object.hasOwnProperty.call(this[REGISTRY], key);
  };
  // 4.4.9
  Registry.prototype.delete = function (key) {
    if (Object.hasOwnProperty.call(this[REGISTRY], key)) {
      delete this[REGISTRY][key];
      return true;
    }
    return false;
  };

  /*
   * Simple ModuleNamespace Exotic object based on a baseObject
   * We export this for allowing a fast-path for module namespace creation over Module descriptors
   */
  // var EVALUATE = createSymbol('evaluate');
  var BASE_OBJECT = createSymbol('baseObject');

  // 8.3.1 Reflect.Module
  /*
   * Best-effort simplified non-spec implementation based on
   * a baseObject referenced via getters.
   *
   * Allows:
   *
   *   loader.registry.set('x', new Module({ default: 'x' }));
   *
   * Optional evaluation function provides experimental Module.evaluate
   * support for non-executed modules in registry.
   */
  function ModuleNamespace (baseObject/*, evaluate*/) {
    Object.defineProperty(this, BASE_OBJECT, {
      value: baseObject
    });

    // evaluate defers namespace population
    /* if (evaluate) {
      Object.defineProperty(this, EVALUATE, {
        value: evaluate,
        configurable: true,
        writable: true
      });
    }
    else { */
      Object.keys(baseObject).forEach(extendNamespace, this);
    //}
  }// 8.4.2
  ModuleNamespace.prototype = Object.create(null);

  if (typeof Symbol !== 'undefined' && Symbol.toStringTag)
    Object.defineProperty(ModuleNamespace.prototype, Symbol.toStringTag, {
      value: 'Module'
    });

  function extendNamespace (key) {
    Object.defineProperty(this, key, {
      enumerable: true,
      get: function () {
        return this[BASE_OBJECT][key];
      }
    });
  }

  /* function doEvaluate (evaluate, context) {
    try {
      evaluate.call(context);
    }
    catch (e) {
      return e;
    }
  }

  // 8.4.1 Module.evaluate... not documented or used because this is potentially unstable
  Module.evaluate = function (ns) {
    var evaluate = ns[EVALUATE];
    if (evaluate) {
      ns[EVALUATE] = undefined;
      var err = doEvaluate(evaluate);
      if (err) {
        // cache the error
        ns[EVALUATE] = function () {
          throw err;
        };
        throw err;
      }
      Object.keys(ns[BASE_OBJECT]).forEach(extendNamespace, ns);
    }
    // make chainable
    return ns;
  }; */

  /*
   * Register Loader
   *
   * Builds directly on top of loader polyfill to provide:
   * - loader.register support
   * - hookable higher-level resolve
   * - instantiate hook returning a ModuleNamespace or undefined for es module loading
   * - loader error behaviour as in HTML and loader specs, caching load and eval errors separately
   * - build tracing support by providing a .trace=true and .loads object format
   */

  var REGISTER_INTERNAL = createSymbol('register-internal');

  function RegisterLoader () {
    Loader.call(this);

    var registryDelete = this.registry.delete;
    this.registry.delete = function (key) {
      var deleted = registryDelete.call(this, key);

      // also delete from register registry if linked
      if (records.hasOwnProperty(key) && !records[key].linkRecord) {
        delete records[key];
        deleted = true;
      }

      return deleted;
    };

    var records = {};

    this[REGISTER_INTERNAL] = {
      // last anonymous System.register call
      lastRegister: undefined,
      // in-flight es module load records
      records: records
    };

    // tracing
    this.trace = false;
  }

  RegisterLoader.prototype = Object.create(Loader.prototype);
  RegisterLoader.prototype.constructor = RegisterLoader;

  var INSTANTIATE = RegisterLoader.instantiate = createSymbol('instantiate');

  // default normalize is the WhatWG style normalizer
  RegisterLoader.prototype[RegisterLoader.resolve = Loader.resolve] = function (key, parentKey) {
    return resolveIfNotPlain(key, parentKey || baseURI);
  };

  RegisterLoader.prototype[INSTANTIATE] = function (key, processAnonRegister) {};

  // once evaluated, the linkRecord is set to undefined leaving just the other load record properties
  // this allows tracking new binding listeners for es modules through importerSetters
  // for dynamic modules, the load record is removed entirely.
  function createLoadRecord (state, key, registration) {
    return state.records[key] = {
      key: key,

      // defined System.register cache
      registration: registration,

      // module namespace object
      module: undefined,

      // es-only
      // this sticks around so new module loads can listen to binding changes
      // for already-loaded modules by adding themselves to their importerSetters
      importerSetters: undefined,

      loadError: undefined,
      evalError: undefined,

      // in-flight linking record
      linkRecord: {
        // promise for instantiated
        instantiatePromise: undefined,
        dependencies: undefined,
        execute: undefined,
        executingRequire: false,

        // underlying module object bindings
        moduleObj: undefined,

        // es only, also indicates if es or not
        setters: undefined,

        // promise for instantiated dependencies (dependencyInstantiations populated)
        depsInstantiatePromise: undefined,
        // will be the array of dependency load record or a module namespace
        dependencyInstantiations: undefined,

        // NB optimization and way of ensuring module objects in setters
        // indicates setters which should run pre-execution of that dependency
        // setters is then just for completely executed module objects
        // alternatively we just pass the partially filled module objects as
        // arguments into the execute function
        // hoisted: undefined
      }
    };
  }

  RegisterLoader.prototype[Loader.resolveInstantiate] = function (key, parentKey) {
    var loader = this;
    var state = this[REGISTER_INTERNAL];
    var registry = this.registry[REGISTRY];

    return resolveInstantiate(loader, key, parentKey, registry, state)
    .then(function (instantiated) {
      if (instantiated instanceof ModuleNamespace)
        return instantiated;

      // resolveInstantiate always returns a load record with a link record and no module value
      var link = instantiated.linkRecord;

      // if already beaten to done, return
      if (!link) {
        if (instantiated.module)
          return instantiated.module;
        throw instantiated.evalError;
      }

      return deepInstantiateDeps(loader, instantiated, link, registry, state)
      .then(function () {
        return ensureEvaluate(loader, instantiated, link, registry, state, undefined);
      });
    });
  };

  function resolveInstantiate (loader, key, parentKey, registry, state) {
    // normalization shortpath for already-normalized key
    // could add a plain name filter, but doesn't yet seem necessary for perf
    var module = registry[key];
    if (module)
      return Promise.resolve(module);

    var load = state.records[key];

    // already linked but not in main registry is ignored
    if (load && !load.module) {
      if (load.loadError)
        return Promise.reject(load.loadError);
      return instantiate(loader, load, load.linkRecord, registry, state);
    }

    return loader.resolve(key, parentKey)
    .then(function (resolvedKey) {
      // main loader registry always takes preference
      module = registry[resolvedKey];
      if (module)
        return module;

      load = state.records[resolvedKey];

      // already has a module value but not already in the registry (load.module)
      // means it was removed by registry.delete, so we should
      // disgard the current load record creating a new one over it
      // but keep any existing registration
      if (!load || load.module)
        load = createLoadRecord(state, resolvedKey, load && load.registration);

      if (load.loadError)
        return Promise.reject(load.loadError);

      var link = load.linkRecord;
      if (!link)
        return load;

      return instantiate(loader, load, link, registry, state);
    });
  }

  function createProcessAnonRegister (loader, load, state) {
    return function () {
      var lastRegister = state.lastRegister;

      if (!lastRegister)
        return !!load.registration;

      state.lastRegister = undefined;
      load.registration = lastRegister;

      return true;
    };
  }

  function instantiate (loader, load, link, registry, state) {
    return link.instantiatePromise || (link.instantiatePromise =
    // if there is already an existing registration, skip running instantiate
    (load.registration ? Promise.resolve() : Promise.resolve().then(function () {
      state.lastRegister = undefined;
      return loader[INSTANTIATE](load.key, loader[INSTANTIATE].length > 1 && createProcessAnonRegister(loader, load, state));
    }))
    .then(function (instantiation) {
      // direct module return from instantiate -> we're done
      if (instantiation !== undefined) {
        if (!(instantiation instanceof ModuleNamespace))
          throw new TypeError('Instantiate did not return a valid Module object.');

        delete state.records[load.key];
        if (loader.trace)
          traceLoad(loader, load, link);
        return registry[load.key] = instantiation;
      }

      // run the cached loader.register declaration if there is one
      var registration = load.registration;
      // clear to allow new registrations for future loads (combined with registry delete)
      load.registration = undefined;
      if (!registration)
        throw new TypeError('Module instantiation did not call an anonymous or correctly named System.register.');

      link.dependencies = registration[0];

      load.importerSetters = [];

      link.moduleObj = {};

      // process System.registerDynamic declaration
      if (registration[2]) {
        link.moduleObj.default = link.moduleObj.__useDefault = {};
        link.executingRequire = registration[1];
        link.execute = registration[2];
      }

      // process System.register declaration
      else {
        registerDeclarative(loader, load, link, registration[1]);
      }

      return load;
    })
    .catch(function (err) {
      load.linkRecord = undefined;
      throw load.loadError = load.loadError || LoaderError__Check_error_message_for_loader_stack(err, 'Instantiating ' + load.key);
    }));
  }

  // like resolveInstantiate, but returning load records for linking
  function resolveInstantiateDep (loader, key, parentKey, registry, state, traceDepMap) {
    // normalization shortpaths for already-normalized key
    // DISABLED to prioritise consistent resolver calls
    // could add a plain name filter, but doesn't yet seem necessary for perf
    /* var load = state.records[key];
    var module = registry[key];

    if (module) {
      if (traceDepMap)
        traceDepMap[key] = key;

      // registry authority check in case module was deleted or replaced in main registry
      if (load && load.module && load.module === module)
        return load;
      else
        return module;
    }

    // already linked but not in main registry is ignored
    if (load && !load.module) {
      if (traceDepMap)
        traceDepMap[key] = key;
      return instantiate(loader, load, load.linkRecord, registry, state);
    } */
    return loader.resolve(key, parentKey)
    .then(function (resolvedKey) {
      if (traceDepMap)
        traceDepMap[key] = resolvedKey;

      // normalization shortpaths for already-normalized key
      var load = state.records[resolvedKey];
      var module = registry[resolvedKey];

      // main loader registry always takes preference
      if (module && (!load || load.module && module !== load.module))
        return module;

      if (load && load.loadError)
        throw load.loadError;

      // already has a module value but not already in the registry (load.module)
      // means it was removed by registry.delete, so we should
      // disgard the current load record creating a new one over it
      // but keep any existing registration
      if (!load || !module && load.module)
        load = createLoadRecord(state, resolvedKey, load && load.registration);

      var link = load.linkRecord;
      if (!link)
        return load;

      return instantiate(loader, load, link, registry, state);
    });
  }

  function traceLoad (loader, load, link) {
    loader.loads = loader.loads || {};
    loader.loads[load.key] = {
      key: load.key,
      deps: link.dependencies,
      dynamicDeps: [],
      depMap: link.depMap || {}
    };
  }

  /*
   * Convert a CJS module.exports into a valid object for new Module:
   *
   *   new Module(getEsModule(module.exports))
   *
   * Sets the default value to the module, while also reading off named exports carefully.
   */
  function registerDeclarative (loader, load, link, declare) {
    var moduleObj = link.moduleObj;
    var importerSetters = load.importerSetters;

    var definedExports = false;

    // closure especially not based on link to allow link record disposal
    var declared = declare.call(envGlobal, function (name, value) {
      if (typeof name === 'object') {
        var changed = false;
        for (var p in name) {
          value = name[p];
          if (p !== '__useDefault' && (!(p in moduleObj) || moduleObj[p] !== value)) {
            changed = true;
            moduleObj[p] = value;
          }
        }
        if (changed === false)
          return value;
      }
      else {
        if ((definedExports || name in moduleObj) && moduleObj[name] === value)
          return value;
        moduleObj[name] = value;
      }

      for (var i = 0; i < importerSetters.length; i++)
        importerSetters[i](moduleObj);

      return value;
    }, new ContextualLoader(loader, load.key));

    link.setters = declared.setters;
    link.execute = declared.execute;
    if (declared.exports) {
      link.moduleObj = moduleObj = declared.exports;
      definedExports = true;
    }
  }

  function instantiateDeps (loader, load, link, registry, state) {
    if (link.depsInstantiatePromise)
      return link.depsInstantiatePromise;

    var depsInstantiatePromises = Array(link.dependencies.length);

    for (var i = 0; i < link.dependencies.length; i++)
      depsInstantiatePromises[i] = resolveInstantiateDep(loader, link.dependencies[i], load.key, registry, state, loader.trace && link.depMap || (link.depMap = {}));

    var depsInstantiatePromise = Promise.all(depsInstantiatePromises)
    .then(function (dependencyInstantiations) {
      link.dependencyInstantiations = dependencyInstantiations;

      // run setters to set up bindings to instantiated dependencies
      if (link.setters) {
        for (var i = 0; i < dependencyInstantiations.length; i++) {
          var setter = link.setters[i];
          if (setter) {
            var instantiation = dependencyInstantiations[i];

            if (instantiation instanceof ModuleNamespace) {
              setter(instantiation);
            }
            else {
              if (instantiation.loadError)
                throw instantiation.loadError;
              setter(instantiation.module || instantiation.linkRecord.moduleObj);
              // this applies to both es and dynamic registrations
              if (instantiation.importerSetters)
                instantiation.importerSetters.push(setter);
            }
          }
        }
      }

      return load;
    });

    if (loader.trace)
      depsInstantiatePromise = depsInstantiatePromise.then(function () {
        traceLoad(loader, load, link);
        return load;
      });

    depsInstantiatePromise = depsInstantiatePromise.catch(function (err) {
      // throw up the instantiateDeps stack
      link.depsInstantiatePromise = undefined;
      throw LoaderError__Check_error_message_for_loader_stack(err, 'Loading ' + load.key);
    });

    depsInstantiatePromise.catch(function () {});

    return link.depsInstantiatePromise = depsInstantiatePromise;
  }

  function deepInstantiateDeps (loader, load, link, registry, state) {
    return new Promise(function (resolve, reject) {
      var seen = [];
      var loadCnt = 0;
      function queueLoad (load) {
        var link = load.linkRecord;
        if (!link)
          return;

        if (seen.indexOf(load) !== -1)
          return;
        seen.push(load);

        loadCnt++;
        instantiateDeps(loader, load, link, registry, state)
        .then(processLoad, reject);
      }
      function processLoad (load) {
        loadCnt--;
        var link = load.linkRecord;
        if (link) {
          for (var i = 0; i < link.dependencies.length; i++) {
            var depLoad = link.dependencyInstantiations[i];
            if (!(depLoad instanceof ModuleNamespace))
              queueLoad(depLoad);
          }
        }
        if (loadCnt === 0)
          resolve();
      }
      queueLoad(load);
    });
  }

  /*
   * System.register
   */
  RegisterLoader.prototype.register = function (key, deps, declare) {
    var state = this[REGISTER_INTERNAL];

    // anonymous modules get stored as lastAnon
    if (declare === undefined) {
      state.lastRegister = [key, deps, undefined];
    }

    // everything else registers into the register cache
    else {
      var load = state.records[key] || createLoadRecord(state, key, undefined);
      load.registration = [deps, declare, undefined];
    }
  };

  /*
   * System.registerDyanmic
   */
  RegisterLoader.prototype.registerDynamic = function (key, deps, executingRequire, execute) {
    var state = this[REGISTER_INTERNAL];

    // anonymous modules get stored as lastAnon
    if (typeof key !== 'string') {
      state.lastRegister = [key, deps, executingRequire];
    }

    // everything else registers into the register cache
    else {
      var load = state.records[key] || createLoadRecord(state, key, undefined);
      load.registration = [deps, executingRequire, execute];
    }
  };

  // ContextualLoader class
  // backwards-compatible with previous System.register context argument by exposing .id, .key
  function ContextualLoader (loader, key) {
    this.loader = loader;
    this.key = this.id = key;
    this.meta = {
      url: key
      // scriptElement: null
    };
  }
  /*ContextualLoader.prototype.constructor = function () {
    throw new TypeError('Cannot subclass the contextual loader only Reflect.Loader.');
  };*/
  ContextualLoader.prototype.import = function (key) {
    if (this.loader.trace)
      this.loader.loads[this.key].dynamicDeps.push(key);
    return this.loader.import(key, this.key);
  };
  /*ContextualLoader.prototype.resolve = function (key) {
    return this.loader.resolve(key, this.key);
  };*/

  // this is the execution function bound to the Module namespace record
  function ensureEvaluate (loader, load, link, registry, state, seen) {
    if (load.module)
      return load.module;

    if (load.evalError)
      throw load.evalError;

    if (seen && seen.indexOf(load) !== -1)
      return load.linkRecord.moduleObj;

    // for ES loads we always run ensureEvaluate on top-level, so empty seen is passed regardless
    // for dynamic loads, we pass seen if also dynamic
    var err = doEvaluate(loader, load, link, registry, state, link.setters ? [] : seen || []);
    if (err)
      throw err;

    return load.module;
  }

  function makeDynamicRequire (loader, key, dependencies, dependencyInstantiations, registry, state, seen) {
    // we can only require from already-known dependencies
    return function (name) {
      for (var i = 0; i < dependencies.length; i++) {
        if (dependencies[i] === name) {
          var depLoad = dependencyInstantiations[i];
          var module;

          if (depLoad instanceof ModuleNamespace)
            module = depLoad;
          else
            module = ensureEvaluate(loader, depLoad, depLoad.linkRecord, registry, state, seen);

          return '__useDefault' in module ? module.__useDefault : module;
        }
      }
      throw new Error('Module ' + name + ' not declared as a System.registerDynamic dependency of ' + key);
    };
  }

  // ensures the given es load is evaluated
  // returns the error if any
  function doEvaluate (loader, load, link, registry, state, seen) {
    seen.push(load);

    var err;

    // es modules evaluate dependencies first
    // non es modules explicitly call moduleEvaluate through require
    if (link.setters) {
      var depLoad, depLink;
      for (var i = 0; i < link.dependencies.length; i++) {
        depLoad = link.dependencyInstantiations[i];

        if (depLoad instanceof ModuleNamespace)
          continue;

        // custom Module returned from instantiate
        depLink = depLoad.linkRecord;
        if (depLink && seen.indexOf(depLoad) === -1) {
          if (depLoad.evalError)
            err = depLoad.evalError;
          else
            // dynamic / declarative boundaries clear the "seen" list
            // we just let cross format circular throw as would happen in real implementations
            err = doEvaluate(loader, depLoad, depLink, registry, state, depLink.setters ? seen : []);
        }

        if (err) {
          load.linkRecord = undefined;
          load.evalError = LoaderError__Check_error_message_for_loader_stack(err, 'Evaluating ' + load.key);
          return load.evalError;
        }
      }
    }

    // link.execute won't exist for Module returns from instantiate on top-level load
    if (link.execute) {
      // ES System.register execute
      // "this" is null in ES
      if (link.setters) {
        err = declarativeExecute(link.execute);
      }
      // System.registerDynamic execute
      // "this" is "exports" in CJS
      else {
        var module = { id: load.key };
        var moduleObj = link.moduleObj;
        Object.defineProperty(module, 'exports', {
          configurable: true,
          set: function (exports) {
            moduleObj.default = moduleObj.__useDefault = exports;
          },
          get: function () {
            return moduleObj.__useDefault;
          }
        });

        var require = makeDynamicRequire(loader, load.key, link.dependencies, link.dependencyInstantiations, registry, state, seen);

        // evaluate deps first
        if (!link.executingRequire)
          for (var i = 0; i < link.dependencies.length; i++)
            require(link.dependencies[i]);

        err = dynamicExecute(link.execute, require, moduleObj.default, module);

        // pick up defineProperty calls to module.exports when we can
        if (module.exports !== moduleObj.__useDefault)
          moduleObj.default = moduleObj.__useDefault = module.exports;

        var moduleDefault = moduleObj.default;

        // __esModule flag extension support via lifting
        if (moduleDefault && moduleDefault.__esModule) {
          for (var p in moduleDefault) {
            if (Object.hasOwnProperty.call(moduleDefault, p))
              moduleObj[p] = moduleDefault[p];
          }
        }
      }
    }

    // dispose link record
    load.linkRecord = undefined;

    if (err)
      return load.evalError = LoaderError__Check_error_message_for_loader_stack(err, 'Evaluating ' + load.key);

    registry[load.key] = load.module = new ModuleNamespace(link.moduleObj);

    // if not an esm module, run importer setters and clear them
    // this allows dynamic modules to update themselves into es modules
    // as soon as execution has completed
    if (!link.setters) {
      if (load.importerSetters)
        for (var i = 0; i < load.importerSetters.length; i++)
          load.importerSetters[i](load.module);
      load.importerSetters = undefined;
    }
  }

  // {} is the closest we can get to call(undefined)
  var nullContext = {};
  if (Object.freeze)
    Object.freeze(nullContext);

  function declarativeExecute (execute) {
    try {
      execute.call(nullContext);
    }
    catch (e) {
      return e;
    }
  }

  function dynamicExecute (execute, require, exports, module) {
    try {
      var output = execute.call(envGlobal, require, exports, module);
      if (output !== undefined)
        module.exports = output;
    }
    catch (e) {
      return e;
    }
  }

  var resolvedPromise$1 = Promise.resolve();
  function noop () {}
  var emptyModule = new ModuleNamespace({});

  var hasStringTag;
  function isModule (m) {
    if (hasStringTag === undefined)
      hasStringTag = typeof Symbol !== 'undefined' && !!Symbol.toStringTag;
    return m instanceof ModuleNamespace || hasStringTag && Object.prototype.toString.call(m) == '[object Module]';
  }

  var CONFIG = createSymbol('loader-config');
  var PLAIN_RESOLVE = createSymbol('plain-resolve');
  var PLAIN_RESOLVE_SYNC = createSymbol('plain-resolve-sync');

  var isWorker = typeof window === 'undefined' && typeof self !== 'undefined' && typeof importScripts !== 'undefined';

  function extend (a, b) {
    for (var p in b) {
      if (!Object.hasOwnProperty.call(b, p))
        continue;
      a[p] = b[p];
    }
    return a;
  }

  var supportsPreload = false, supportsPrefetch = false;
  if (isBrowser)
    (function () {
      var relList = document.createElement('link').relList;
      if (relList && relList.supports) {
        supportsPrefetch = true;
        try {
          supportsPreload = relList.supports('preload');
        }
        catch (e) {}
      }
    })();

  function preloadScript (url) {
    // fallback to old fashioned image technique which still works in safari
    if (!supportsPreload && !supportsPrefetch) {
      var preloadImage = new Image();
      preloadImage.src = url;
      return;
    }

    var link = document.createElement('link');
    if (supportsPreload) {
      link.rel = 'preload';
      link.as = 'script';
    }
    else {
      // this works for all except Safari (detected by relList.supports lacking)
      link.rel = 'prefetch';
    }
    link.href = url;
    document.head.appendChild(link);
  }

  function workerImport (src, resolve, reject) {
    try {
      importScripts(src);
    }
    catch (e) {
      reject(e);
    }
    resolve();
  }

  if (isBrowser) {
    var onerror = window.onerror;
    window.onerror = function globalOnerror (msg, src) {
      if (onerror)
        onerror.apply(this, arguments);
    };
  }

  function scriptLoad (src, crossOrigin, integrity, resolve, reject) {
    // percent encode just "#" for HTTP requests
    src = src.replace(/#/g, '%23');

    // subresource integrity is not supported in web workers
    if (isWorker)
      return workerImport(src, resolve, reject);

    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.charset = 'utf-8';
    script.async = true;

    if (crossOrigin)
      script.crossOrigin = crossOrigin;
    if (integrity)
      script.integrity = integrity;

    script.addEventListener('load', load, false);
    script.addEventListener('error', error, false);

    script.src = src;
    document.head.appendChild(script);

    function load () {
      resolve();
      cleanup();
    }

    // note this does not catch execution errors
    function error (err) {
      cleanup();
      reject(new Error('Fetching ' + src));
    }

    function cleanup () {
      script.removeEventListener('load', load, false);
      script.removeEventListener('error', error, false);
      document.head.removeChild(script);
    }
  }

  // separate out paths cache as a baseURL lock process
  function applyPaths (baseURL, paths, key) {
    var mapMatch = getMapMatch(paths, key);
    if (mapMatch) {
      var target = paths[mapMatch] + key.substr(mapMatch.length);

      var resolved = resolveIfNotPlain(target, baseURI);
      if (resolved !== undefined)
        return resolved;

      return baseURL + target;
    }
    else if (key.indexOf(':') !== -1) {
      return key;
    }
    else {
      return baseURL + key;
    }
  }

  function checkMap (p) {
    var name = this.name;
    // can add ':' here if we want paths to match the behaviour of map
    if (name.substr(0, p.length) === p && (name.length === p.length || name[p.length] === '/' || p[p.length - 1] === '/' || p[p.length - 1] === ':')) {
      var curLen = p.split('/').length;
      if (curLen > this.len) {
        this.match = p;
        this.len = curLen;
      }
    }
  }

  function getMapMatch (map, name) {
    if (Object.hasOwnProperty.call(map, name))
      return name;

    var bestMatch = {
      name: name,
      match: undefined,
      len: 0
    };

    Object.keys(map).forEach(checkMap, bestMatch);

    return bestMatch.match;
  }

  function setAmdHelper (loader) {

    /*
      AMD-compatible require
      To copy RequireJS, set window.require = window.requirejs = loader.amdRequire
    */
    function require (names, callback, errback, referer) {
      // in amd, first arg can be a config object... we just ignore
      if (typeof names === 'object' && !(names instanceof Array))
        return require.apply(null, Array.prototype.splice.call(arguments, 1, arguments.length - 1));

      // amd require
      if (typeof names === 'string' && typeof callback === 'function')
        names = [names];
      if (names instanceof Array) {
        var dynamicRequires = [];
        for (var i = 0; i < names.length; i++)
          dynamicRequires.push(loader.import(names[i], referer));
        Promise.all(dynamicRequires).then(function (modules) {
          if (callback)
            callback.apply(null, modules);
        }, errback);
      }

      // commonjs require
      else if (typeof names === 'string') {
        var normalized = loader.decanonicalize(names, referer);
        var module = loader.get(normalized);
        if (!module)
          throw new Error('Module not already loaded loading "' + names + '" as ' + normalized + (referer ? ' from "' + referer + '".' : '.'));
        return '__useDefault' in module ? module.__useDefault : module;
      }

      else
        throw new TypeError('Invalid require');
    }

    function define (name, deps, factory) {
      if (typeof name !== 'string') {
        factory = deps;
        deps = name;
        name = null;
      }

      if (!(deps instanceof Array)) {
        factory = deps;
        deps = ['require', 'exports', 'module'].splice(0, factory.length);
      }

      if (typeof factory !== 'function')
        factory = (function (factory) {
          return function() { return factory; }
        })(factory);

      if (!name) {
        if (curMetaDeps) {
          deps = deps.concat(curMetaDeps);
          curMetaDeps = undefined;
        }
      }

      // remove system dependencies
      var requireIndex, exportsIndex, moduleIndex;

      if ((requireIndex = deps.indexOf('require')) !== -1) {

        deps.splice(requireIndex, 1);

        // only trace cjs requires for non-named
        // named defines assume the trace has already been done
        if (!name)
          deps = deps.concat(amdGetCJSDeps(factory.toString(), requireIndex));
      }

      if ((exportsIndex = deps.indexOf('exports')) !== -1)
        deps.splice(exportsIndex, 1);

      if ((moduleIndex = deps.indexOf('module')) !== -1)
        deps.splice(moduleIndex, 1);

      function execute (req, exports, module) {
        var depValues = [];
        for (var i = 0; i < deps.length; i++)
          depValues.push(req(deps[i]));

        module.uri = module.id;

        module.config = noop;

        // add back in system dependencies
        if (moduleIndex !== -1)
          depValues.splice(moduleIndex, 0, module);

        if (exportsIndex !== -1)
          depValues.splice(exportsIndex, 0, exports);

        if (requireIndex !== -1) {
          var contextualRequire = function (names, callback, errback) {
            if (typeof names === 'string' && typeof callback !== 'function')
              return req(names);
            return require.call(loader, names, callback, errback, module.id);
          };
          contextualRequire.toUrl = function (name) {
            return loader.normalizeSync(name, module.id);
          };
          depValues.splice(requireIndex, 0, contextualRequire);
        }

        // set global require to AMD require
        var curRequire = envGlobal.require;
        envGlobal.require = require;

        var output = factory.apply(exportsIndex === -1 ? envGlobal : exports, depValues);

        envGlobal.require = curRequire;

        if (typeof output !== 'undefined')
          module.exports = output;
      }

      // anonymous define
      if (!name) {
        loader.registerDynamic(deps, false, curEsModule ? wrapEsModuleExecute(execute) : execute);
      }
      else {
        loader.registerDynamic(name, deps, false, execute);

        // if we don't have any other defines,
        // then let this be an anonymous define
        // this is just to support single modules of the form:
        // define('jquery')
        // still loading anonymously
        // because it is done widely enough to be useful
        // as soon as there is more than one define, this gets removed though
        if (lastNamedDefine) {
          lastNamedDefine = undefined;
          multipleNamedDefines = true;
        }
        else if (!multipleNamedDefines) {
          lastNamedDefine = [deps, execute];
        }
      }
    }
    define.amd = {};

    loader.amdDefine = define;
    loader.amdRequire = require;
  }

  // CJS
  var windowOrigin;
  if (typeof window !== 'undefined' && typeof document !== 'undefined' && window.location)
    windowOrigin = location.protocol + '//' + location.hostname + (location.port ? ':' + location.port : '');

  var commentRegEx = /(^|[^\\])(\/\*([\s\S]*?)\*\/|([^:]|^)\/\/(.*)$)/mg;

  // Global
  // bare minimum ignores
  var ignoredGlobalProps = ['_g', 'sessionStorage', 'localStorage', 'clipboardData', 'frames', 'frameElement', 'external',
    'mozAnimationStartTime', 'mozPaintCount', 'webkitStorageInfo', 'webkitIndexedDB', 'mozInnerScreenY', 'mozInnerScreenX'];
  function globalIterator (globalName) {
    if (ignoredGlobalProps.indexOf(globalName) !== -1)
      return;
    try {
      var value = envGlobal[globalName];
    }
    catch (e) {
      ignoredGlobalProps.push(globalName);
    }
    this(globalName, value);
  }

  // AMD
  var cjsRequirePre = "(?:^|[^$_a-zA-Z\\xA0-\\uFFFF.])";
  var cjsRequirePost = "\\s*\\(\\s*(\"([^\"]+)\"|'([^']+)')\\s*\\)";
  var fnBracketRegEx = /\(([^\)]*)\)/;
  var wsRegEx = /^\s+|\s+$/g;

  var requireRegExs = {};

  function amdGetCJSDeps(source, requireIndex) {

    // remove comments
    source = source.replace(commentRegEx, '');

    // determine the require alias
    var params = source.match(fnBracketRegEx);
    var requireAlias = (params[1].split(',')[requireIndex] || 'require').replace(wsRegEx, '');

    // find or generate the regex for this requireAlias
    var requireRegEx = requireRegExs[requireAlias] || (requireRegExs[requireAlias] = new RegExp(cjsRequirePre + requireAlias + cjsRequirePost, 'g'));

    requireRegEx.lastIndex = 0;

    var deps = [];

    var match;
    while (match = requireRegEx.exec(source))
      deps.push(match[2] || match[3]);

    return deps;
  }

  function wrapEsModuleExecute (execute) {
    return function (require, exports, module) {
      execute(require, exports, module);
      exports = module.exports;
      if ((typeof exports === 'object' || typeof exports === 'function') && !('__esModule' in exports))
        Object.defineProperty(module.exports, '__esModule', {
          value: true
        });
    };
  }

  // generate anonymous define from singular named define
  var multipleNamedDefines = false;
  var lastNamedDefine;
  var curMetaDeps;
  var curEsModule = false;
  function registerLastDefine (loader) {
    if (lastNamedDefine)
      loader.registerDynamic(curMetaDeps ? lastNamedDefine[0].concat(curMetaDeps) : lastNamedDefine[0],
          false, curEsModule ? wrapEsModuleExecute(lastNamedDefine[1]) : lastNamedDefine[1]);

    // bundles are an empty module
    else if (multipleNamedDefines)
      loader.registerDynamic([], false, noop);
  }

  function SystemJSProductionLoader () {
    RegisterLoader.call(this);

    // internal configuration
    this[CONFIG] = {
      baseURL: baseURI,
      paths: {},
      map: {},
      submap: {},
      depCache: {}
    };

    setAmdHelper(this);
    if (isBrowser)
      envGlobal.define = this.amdDefine;
  }

  SystemJSProductionLoader.plainResolve = PLAIN_RESOLVE;
  SystemJSProductionLoader.plainResolveSync = PLAIN_RESOLVE_SYNC;

  var systemJSPrototype = SystemJSProductionLoader.prototype = Object.create(RegisterLoader.prototype);

  systemJSPrototype.constructor = SystemJSProductionLoader;

  systemJSPrototype[SystemJSProductionLoader.resolve = RegisterLoader.resolve] = function (key, parentKey) {
    var resolved = resolveIfNotPlain(key, parentKey || baseURI);
    if (resolved !== undefined)
      return Promise.resolve(resolved);

    // plain resolution
    var loader = this;
    return resolvedPromise$1
    .then(function () {
      return loader[PLAIN_RESOLVE](key, parentKey);
    })
    .then(function (resolved) {
      resolved = resolved || key;
      // if in the registry then we are done
      if (loader.registry.has(resolved))
        return resolved;

      // then apply paths
      // baseURL is fallback
      var config = loader[CONFIG];
      return applyPaths(config.baseURL, config.paths, resolved);
    });
  };

  systemJSPrototype.newModule = function (bindings) {
    return new ModuleNamespace(bindings);
  };

  systemJSPrototype.isModule = isModule;

  systemJSPrototype.resolveSync = function (key, parentKey) {
    var resolved = resolveIfNotPlain(key, parentKey || baseURI);
    if (resolved !== undefined)
      return resolved;

    // plain resolution
    resolved = this[PLAIN_RESOLVE_SYNC](key, parentKey) || key;

    if (this.registry.has(resolved))
      return resolved;

    // then apply paths
    var config = this[CONFIG];
    return applyPaths(config.baseURL, config.paths, resolved);
  };

  systemJSPrototype[PLAIN_RESOLVE] = systemJSPrototype[PLAIN_RESOLVE_SYNC] = plainResolve;

  systemJSPrototype[SystemJSProductionLoader.instantiate = RegisterLoader.instantiate] = coreInstantiate;

  systemJSPrototype.config = function (cfg) {
    var config = this[CONFIG];

    if (cfg.baseURL) {
      config.baseURL = resolveIfNotPlain(cfg.baseURL, baseURI) || resolveIfNotPlain('./' + cfg.baseURL, baseURI);
      if (config.baseURL[config.baseURL.length - 1] !== '/')
        config.baseURL += '/';
    }

    if (cfg.paths)
      extend(config.paths, cfg.paths);

    if (cfg.map) {
      var val = cfg.map;
      for (var p in val) {
        if (!Object.hasOwnProperty.call(val, p))
          continue;

        var v = val[p];

        if (typeof v === 'string') {
          config.map[p] = v;
        }

        // object submap
        else {
          // normalize parent with URL and paths only
          var resolvedParent = resolveIfNotPlain(p, baseURI) || applyPaths(config.baseURL, config.paths, p);
          extend(config.submap[resolvedParent] || (config.submap[resolvedParent] = {}), v);
        }
      }
    }

    config.wasm = cfg.wasm === true;

    for (var p in cfg) {
      if (!Object.hasOwnProperty.call(cfg, p))
        continue;

      var val = cfg[p];

      switch (p) {
        case 'baseURL':
        case 'paths':
        case 'map':
        case 'wasm':
        break;

        case 'depCache':
          for (var p in val) {
            if (!Object.hasOwnProperty.call(val, p))
              continue;
            var resolvedParent = this.resolveSync(p, undefined);
            config.depCache[resolvedParent] = (config.depCache[resolvedParent] || []).concat(val[p]);
          }
        break;

        default:
          throw new TypeError('The SystemJS production build does not support the "' + p + '" configuration option.');
      }
    }
  };

  // getConfig configuration cloning
  systemJSPrototype.getConfig = function (name) {
    var config = this[CONFIG];

    var map = {};
    extend(map, config.map);
    for (var p in config.submap) {
      if (!Object.hasOwnProperty.call(config.submap, p))
        continue;
      map[p] = extend({}, config.submap[p]);
    }

    var depCache = {};
    for (var p in config.depCache) {
      if (!Object.hasOwnProperty.call(config.depCache, p))
        continue;
      depCache[p] = [].concat(config.depCache[p]);
    }

    return {
      baseURL: config.baseURL,
      paths: extend({}, config.paths),
      depCache: depCache,
      map: map,
      wasm: config.wasm === true
    };
  };

  // ensure System.register and System.registerDynamic decanonicalize
  systemJSPrototype.register = function (key, deps, declare) {
    if (typeof key === 'string')
      key = this.resolveSync(key, undefined);
    return RegisterLoader.prototype.register.call(this, key, deps, declare);
  };

  systemJSPrototype.registerDynamic = function (key, deps, executingRequire, execute) {
    if (typeof key === 'string')
      key = this.resolveSync(key, undefined);
    return RegisterLoader.prototype.registerDynamic.call(this, key, deps, executingRequire, execute);
  };

  function plainResolve (key, parentKey) {
    var config = this[CONFIG];

    // Apply contextual submap
    if (parentKey) {
      var parent = getMapMatch(config.submap, parentKey);
      var submap = config.submap[parent];
      var mapMatch = submap && getMapMatch(submap, key);

      if (mapMatch) {
        var target = submap[mapMatch] + key.substr(mapMatch.length);
        return resolveIfNotPlain(target, parent) || target;
      }
    }

    // Apply global map
    var map = config.map;
    var mapMatch = getMapMatch(map, key);

    if (mapMatch) {
      var target = map[mapMatch] + key.substr(mapMatch.length);
      return resolveIfNotPlain(target, parentKey || config.baseURL) || target;
    }
  }

  function instantiateWasm (loader, response, processAnonRegister) {
    return WebAssembly.compileStreaming(response).then(function (module) {
      var deps = [];
      var setters = [];
      var importObj = {};

      // we can only set imports if supported (eg early Safari doesnt support)
      if (WebAssembly.Module.imports)
        WebAssembly.Module.imports(module).forEach(function (i) {
          var key = i.module;
          setters.push(function (m) {
            importObj[key] = m;
          });
          if (deps.indexOf(key) === -1)
            deps.push(key);
        });

      loader.register(deps, function (_export) {
        return {
          setters: setters,
          execute: function () {
            _export(new WebAssembly.Instance(module, importObj).exports);
          }
        };
      });
      processAnonRegister();
    });
  }

  function doScriptLoad (loader, url, processAnonRegister) {
    // store a global snapshot in case it turns out to be global
    Object.keys(envGlobal).forEach(globalIterator, function (name, value) {
      globalSnapshot$1[name] = value;
    });

    return new Promise(function (resolve, reject) {
      return scriptLoad(url, 'anonymous', undefined, function () {

        // check for System.register call
        var registered = processAnonRegister();
        if (!registered) {
          // no System.register -> support named AMD as anonymous
          registerLastDefine(loader);
          registered = processAnonRegister();

          // still no registration -> attempt a global detection
          if (!registered) {
            var moduleValue = retrieveGlobal();
            loader.register([], function () {
              return {
                exports: moduleValue
              };
            });
            processAnonRegister();
          }
        }
        resolve();
      }, reject);
    });
  }

  function doEvalLoad (loader, url, source, processAnonRegister) {
    // store a global snapshot in case it turns out to be global
    Object.keys(envGlobal).forEach(globalIterator, function (name, value) {
      globalSnapshot$1[name] = value;
    });

    (0, eval)(source + '\n//# sourceURL=' + url);

    // check for System.register call
    var registered = processAnonRegister();
    if (!registered) {
      // no System.register -> support named AMD as anonymous
      registerLastDefine(loader);
      registered = processAnonRegister();

      // still no registration -> attempt a global detection
      if (!registered) {
        var moduleValue = retrieveGlobal();
        loader.register([], function () {
          return {
            exports: moduleValue
          };
        });
        processAnonRegister();
      }
    }
  }

  var globalSnapshot$1 = {};
  function retrieveGlobal () {
    var globalValue = { default: undefined };
    var multipleGlobals = false;
    var globalName = undefined;

    Object.keys(envGlobal).forEach(globalIterator, function (name, value) {
      if (globalSnapshot$1[name] === value)
        return;
      // update global snapshot as we go
      globalSnapshot$1[name] = value;

      if (value === undefined)
        return;

      if (multipleGlobals) {
        globalValue[name] = value;
      }
      else if (globalName) {
        if (globalValue.default !== value) {
          multipleGlobals = true;
          globalValue.__esModule = true;
          globalValue[globalName] = globalValue.default;
          globalValue[name] = value;
        }
      }
      else {
        globalValue.default = value;
        globalName = name;
      }
    });

    return globalValue;
  }

  function coreInstantiate (key, processAnonRegister) {
    var config = this[CONFIG];

    var depCache = config.depCache[key];
    if (depCache) {
      for (var i = 0; i < depCache.length; i++)
        this.resolve(depCache[i], key).then(preloadScript);
    }

    if (config.wasm) {
      var loader = this;
      return fetch(key)
      .then(function (res) {
        if (!res.ok)
          throw new Error('Fetch error: ' + res.status + ' ' + res.statusText);
        if (res.headers.get('content-type').indexOf('application/wasm') === -1) {
          return res.text()
          .then(function (source) {
            doEvalLoad(loader, key, source, processAnonRegister);
          });
        }
        return instantiateWasm(loader, res, processAnonRegister);
      });
    }

    return doScriptLoad(this, key, processAnonRegister);
  }

  SystemJSProductionLoader.prototype.version = "0.21.3 Production";

  var System = new SystemJSProductionLoader();

  // only set the global System on the global in browsers
  if (isBrowser || isWorker) {
    envGlobal.SystemJS = System;

    // dont override an existing System global
    if (!envGlobal.System) {
      envGlobal.System = System;
    }
    // rather just extend or set a System.register on the existing System global
    else {
      var register = envGlobal.System.register;
      envGlobal.System.register = function () {
        if (register)
          register.apply(this, arguments);
        System.register.apply(System, arguments);
      };
    }
  }

  if (typeof module !== 'undefined' && module.exports)
    module.exports = System;

}());
//# sourceMappingURL=system-production.src.js.map