node_modules/zone.js/dist/zone-patch-fetch.js

/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(factory());
}(this, (function () { 'use strict';

/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/**
 * @fileoverview
 * @suppress {missingRequire}
 */
Zone.__load_patch('fetch', function (global, Zone, api) {
    var fetch = global['fetch'];
    if (typeof fetch !== 'function') {
        return;
    }
    var originalFetch = global[api.symbol('fetch')];
    if (originalFetch) {
        // restore unpatched fetch first
        fetch = originalFetch;
    }
    var ZoneAwarePromise = global.Promise;
    var symbolThenPatched = api.symbol('thenPatched');
    var fetchTaskScheduling = api.symbol('fetchTaskScheduling');
    var fetchTaskAborting = api.symbol('fetchTaskAborting');
    var OriginalAbortController = global['AbortController'];
    var supportAbort = typeof OriginalAbortController === 'function';
    var abortNative = null;
    if (supportAbort) {
        global['AbortController'] = function () {
            var abortController = new OriginalAbortController();
            var signal = abortController.signal;
            signal.abortController = abortController;
            return abortController;
        };
        abortNative = api.patchMethod(OriginalAbortController.prototype, 'abort', function (delegate) { return function (self, args) {
            if (self.task) {
                return self.task.zone.cancelTask(self.task);
            }
            return delegate.apply(self, args);
        }; });
    }
    var placeholder = function () { };
    global['fetch'] = function () {
        var _this = this;
        var args = Array.prototype.slice.call(arguments);
        var options = args.length > 1 ? args[1] : null;
        var signal = options && options.signal;
        return new Promise(function (res, rej) {
            var task = Zone.current.scheduleMacroTask('fetch', placeholder, { fetchArgs: args }, function () {
                var fetchPromise;
                var zone = Zone.current;
                try {
                    zone[fetchTaskScheduling] = true;
                    fetchPromise = fetch.apply(_this, args);
                }
                catch (error) {
                    rej(error);
                    return;
                }
                finally {
                    zone[fetchTaskScheduling] = false;
                }
                if (!(fetchPromise instanceof ZoneAwarePromise)) {
                    var ctor = fetchPromise.constructor;
                    if (!ctor[symbolThenPatched]) {
                        api.patchThen(ctor);
                    }
                }
                fetchPromise.then(function (resource) {
                    if (task.state !== 'notScheduled') {
                        task.invoke();
                    }
                    res(resource);
                }, function (error) {
                    if (task.state !== 'notScheduled') {
                        task.invoke();
                    }
                    rej(error);
                });
            }, function () {
                if (!supportAbort) {
                    rej('No AbortController supported, can not cancel fetch');
                    return;
                }
                if (signal && signal.abortController && !signal.aborted &&
                    typeof signal.abortController.abort === 'function' && abortNative) {
                    try {
                        Zone.current[fetchTaskAborting] = true;
                        abortNative.call(signal.abortController);
                    }
                    finally {
                        Zone.current[fetchTaskAborting] = false;
                    }
                }
                else {
                    rej('cancel fetch need a AbortController.signal');
                }
            });
            if (signal && signal.abortController) {
                signal.abortController.task = task;
            }
        });
    };
});

})));