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| /** * @license * Copyright Google LLC 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 *//** * Suppress closure compiler errors about unknown 'global' variable * @fileoverview * @suppress {undefinedVars} *//** * Zone is a mechanism for intercepting and keeping track of asynchronous work. * * A Zone is a global object which is configured with rules about how to intercept and keep track * of the asynchronous callbacks. Zone has these responsibilities: * * 1. Intercept asynchronous task scheduling * 2. Wrap callbacks for error-handling and zone tracking across async operations. * 3. Provide a way to attach data to zones * 4. Provide a context specific last frame error handling * 5. (Intercept blocking methods) * * A zone by itself does not do anything, instead it relies on some other code to route existing * platform API through it. (The zone library ships with code which monkey patches all of the * browsers's asynchronous API and redirects them through the zone for interception.) * * In its simplest form a zone allows one to intercept the scheduling and calling of asynchronous * operations, and execute additional code before as well as after the asynchronous task. The rules * of interception are configured using [ZoneConfig]. There can be many different zone instances in * a system, but only one zone is active at any given time which can be retrieved using * [Zone#current]. * * * * ## Callback Wrapping * * An important aspect of the zones is that they should persist across asynchronous operations. To * achieve this, when a future work is scheduled through async API, it is necessary to capture, and * subsequently restore the current zone. For example if a code is running in zone `b` and it * invokes `setTimeout` to scheduleTask work later, the `setTimeout` method needs to 1) capture the * current zone and 2) wrap the `wrapCallback` in code which will restore the current zone `b` once * the wrapCallback executes. In this way the rules which govern the current code are preserved in * all future asynchronous tasks. There could be a different zone `c` which has different rules and * is associated with different asynchronous tasks. As these tasks are processed, each asynchronous * wrapCallback correctly restores the correct zone, as well as preserves the zone for future * asynchronous callbacks. * * Example: Suppose a browser page consist of application code as well as third-party * advertisement code. (These two code bases are independent, developed by different mutually * unaware developers.) The application code may be interested in doing global error handling and * so it configures the `app` zone to send all of the errors to the server for analysis, and then * executes the application in the `app` zone. The advertising code is interested in the same * error processing but it needs to send the errors to a different third-party. So it creates the * `ads` zone with a different error handler. Now both advertising as well as application code * create many asynchronous operations, but the [Zone] will ensure that all of the asynchronous * operations created from the application code will execute in `app` zone with its error * handler and all of the advertisement code will execute in the `ads` zone with its error handler. * This will not only work for the async operations created directly, but also for all subsequent * asynchronous operations. * * If you think of chain of asynchronous operations as a thread of execution (bit of a stretch) * then [Zone#current] will act as a thread local variable. * * * * ## Asynchronous operation scheduling * * In addition to wrapping the callbacks to restore the zone, all operations which cause a * scheduling of work for later are routed through the current zone which is allowed to intercept * them by adding work before or after the wrapCallback as well as using different means of * achieving the request. (Useful for unit testing, or tracking of requests). In some instances * such as `setTimeout` the wrapping of the wrapCallback and scheduling is done in the same * wrapCallback, but there are other examples such as `Promises` where the `then` wrapCallback is * wrapped, but the execution of `then` is triggered by `Promise` scheduling `resolve` work. * * Fundamentally there are three kinds of tasks which can be scheduled: * * 1. [MicroTask] used for doing work right after the current task. This is non-cancelable which is *    guaranteed to run exactly once and immediately. * 2. [MacroTask] used for doing work later. Such as `setTimeout`. This is typically cancelable *    which is guaranteed to execute at least once after some well understood delay. * 3. [EventTask] used for listening on some future event. This may execute zero or more times, with *    an unknown delay. * * Each asynchronous API is modeled and routed through one of these APIs. * * * ### [MicroTask] * * [MicroTask]s represent work which will be done in current VM turn as soon as possible, before VM * yielding. * * * ### [MacroTask] * * [MacroTask]s represent work which will be done after some delay. (Sometimes the delay is * approximate such as on next available animation frame). Typically these methods include: * `setTimeout`, `setImmediate`, `setInterval`, `requestAnimationFrame`, and all browser specific * variants. * * * ### [EventTask] * * [EventTask]s represent a request to create a listener on an event. Unlike the other task * events they may never be executed, but typically execute more than once. There is no queue of * events, rather their callbacks are unpredictable both in order and time. * * * ## Global Error Handling * * * ## Composability * * Zones can be composed together through [Zone.fork()]. A child zone may create its own set of * rules. A child zone is expected to either: * * 1. Delegate the interception to a parent zone, and optionally add before and after wrapCallback *    hooks. * 2. Process the request itself without delegation. * * Composability allows zones to keep their concerns clean. For example a top most zone may choose * to handle error handling, while child zones may choose to do user action tracking. * * * ## Root Zone * * At the start the browser will run in a special root zone, which is configured to behave exactly * like the platform, making any existing code which is not zone-aware behave as expected. All * zones are children of the root zone. * */interface Zone {    /**     *     * @returns {Zone} The parent Zone.     */    parent: Zone | null;    /**     * @returns {string} The Zone name (useful for debugging)     */    name: string;    /**     * Returns a value associated with the `key`.     *     * If the current zone does not have a key, the request is delegated to the parent zone. Use     * [ZoneSpec.properties] to configure the set of properties associated with the current zone.     *     * @param key The key to retrieve.     * @returns {any} The value for the key, or `undefined` if not found.     */    get(key: string): any;    /**     * Returns a Zone which defines a `key`.     *     * Recursively search the parent Zone until a Zone which has a property `key` is found.     *     * @param key The key to use for identification of the returned zone.     * @returns {Zone} The Zone which defines the `key`, `null` if not found.     */    getZoneWith(key: string): Zone | null;    /**     * Used to create a child zone.     *     * @param zoneSpec A set of rules which the child zone should follow.     * @returns {Zone} A new child zone.     */    fork(zoneSpec: ZoneSpec): Zone;    /**     * Wraps a callback function in a new function which will properly restore the current zone upon     * invocation.     *     * The wrapped function will properly forward `this` as well as `arguments` to the `callback`.     *     * Before the function is wrapped the zone can intercept the `callback` by declaring     * [ZoneSpec.onIntercept].     *     * @param callback the function which will be wrapped in the zone.     * @param source A unique debug location of the API being wrapped.     * @returns {function(): *} A function which will invoke the `callback` through [Zone.runGuarded].     */    wrap<F extends Function>(callback: F, source: string): F;    /**     * Invokes a function in a given zone.     *     * The invocation of `callback` can be intercepted by declaring [ZoneSpec.onInvoke].     *     * @param callback The function to invoke.     * @param applyThis     * @param applyArgs     * @param source A unique debug location of the API being invoked.     * @returns {any} Value from the `callback` function.     */    run<T>(callback: Function, applyThis?: any, applyArgs?: any[], source?: string): T;    /**     * Invokes a function in a given zone and catches any exceptions.     *     * Any exceptions thrown will be forwarded to [Zone.HandleError].     *     * The invocation of `callback` can be intercepted by declaring [ZoneSpec.onInvoke]. The     * handling of exceptions can be intercepted by declaring [ZoneSpec.handleError].     *     * @param callback The function to invoke.     * @param applyThis     * @param applyArgs     * @param source A unique debug location of the API being invoked.     * @returns {any} Value from the `callback` function.     */    runGuarded<T>(callback: Function, applyThis?: any, applyArgs?: any[], source?: string): T;    /**     * Execute the Task by restoring the [Zone.currentTask] in the Task's zone.     *     * @param task to run     * @param applyThis     * @param applyArgs     * @returns {any} Value from the `task.callback` function.     */    runTask<T>(task: Task, applyThis?: any, applyArgs?: any): T;    /**     * Schedule a MicroTask.     *     * @param source     * @param callback     * @param data     * @param customSchedule     */    scheduleMicroTask(source: string, callback: Function, data?: TaskData, customSchedule?: (task: Task) => void): MicroTask;    /**     * Schedule a MacroTask.     *     * @param source     * @param callback     * @param data     * @param customSchedule     * @param customCancel     */    scheduleMacroTask(source: string, callback: Function, data?: TaskData, customSchedule?: (task: Task) => void, customCancel?: (task: Task) => void): MacroTask;    /**     * Schedule an EventTask.     *     * @param source     * @param callback     * @param data     * @param customSchedule     * @param customCancel     */    scheduleEventTask(source: string, callback: Function, data?: TaskData, customSchedule?: (task: Task) => void, customCancel?: (task: Task) => void): EventTask;    /**     * Schedule an existing Task.     *     * Useful for rescheduling a task which was already canceled.     *     * @param task     */    scheduleTask<T extends Task>(task: T): T;    /**     * Allows the zone to intercept canceling of scheduled Task.     *     * The interception is configured using [ZoneSpec.onCancelTask]. The default canceler invokes     * the [Task.cancelFn].     *     * @param task     * @returns {any}     */    cancelTask(task: Task): any;}interface ZoneType {    /**     * @returns {Zone} Returns the current [Zone]. The only way to change     * the current zone is by invoking a run() method, which will update the current zone for the     * duration of the run method callback.     */    current: Zone;    /**     * @returns {Task} The task associated with the current execution.     */    currentTask: Task | null;    /**     * Verify that Zone has been correctly patched. Specifically that Promise is zone aware.     */    assertZonePatched(): void;    /**     *  Return the root zone.     */    root: Zone;    /**     * load patch for specified native module, allow user to     * define their own patch, user can use this API after loading zone.js     */    __load_patch(name: string, fn: _PatchFn, ignoreDuplicate?: boolean): void;    /**     * Zone symbol API to generate a string with __zone_symbol__ prefix     */    __symbol__(name: string): string;}/** * Patch Function to allow user define their own monkey patch module. */type _PatchFn = (global: Window, Zone: ZoneType, api: _ZonePrivate) => void;/** * _ZonePrivate interface to provide helper method to help user implement * their own monkey patch module. */interface _ZonePrivate {    currentZoneFrame: () => _ZoneFrame;    symbol: (name: string) => string;    scheduleMicroTask: (task?: MicroTask) => void;    onUnhandledError: (error: Error) => void;    microtaskDrainDone: () => void;    showUncaughtError: () => boolean;    patchEventTarget: (global: any, api: _ZonePrivate, apis: any[], options?: any) => boolean[];    patchOnProperties: (obj: any, properties: string[] | null, prototype?: any) => void;    patchThen: (ctro: Function) => void;    patchMethod: (target: any, name: string, patchFn: (delegate: Function, delegateName: string, name: string) => (self: any, args: any[]) => any) => Function | null;    bindArguments: (args: any[], source: string) => any[];    patchMacroTask: (obj: any, funcName: string, metaCreator: (self: any, args: any[]) => any) => void;    patchEventPrototype: (_global: any, api: _ZonePrivate) => void;    isIEOrEdge: () => boolean;    ObjectDefineProperty: (o: any, p: PropertyKey, attributes: PropertyDescriptor & ThisType<any>) => any;    ObjectGetOwnPropertyDescriptor: (o: any, p: PropertyKey) => PropertyDescriptor | undefined;    ObjectCreate(o: object | null, properties?: PropertyDescriptorMap & ThisType<any>): any;    ArraySlice(start?: number, end?: number): any[];    patchClass: (className: string) => void;    wrapWithCurrentZone: (callback: any, source: string) => any;    filterProperties: (target: any, onProperties: string[], ignoreProperties: any[]) => string[];    attachOriginToPatched: (target: any, origin: any) => void;    _redefineProperty: (target: any, callback: string, desc: any) => void;    nativeScheduleMicroTask: (func: Function) => void;    patchCallbacks: (api: _ZonePrivate, target: any, targetName: string, method: string, callbacks: string[]) => void;    getGlobalObjects: () => {        globalSources: any;        zoneSymbolEventNames: any;        eventNames: string[];        isBrowser: boolean;        isMix: boolean;        isNode: boolean;        TRUE_STR: string;        FALSE_STR: string;        ZONE_SYMBOL_PREFIX: string;        ADD_EVENT_LISTENER_STR: string;        REMOVE_EVENT_LISTENER_STR: string;    } | undefined;}/** * _ZoneFrame represents zone stack frame information */interface _ZoneFrame {    parent: _ZoneFrame | null;    zone: Zone;}interface UncaughtPromiseError extends Error {    zone: Zone;    task: Task;    promise: Promise<any>;    rejection: any;    throwOriginal?: boolean;}/** * Provides a way to configure the interception of zone events. * * Only the `name` property is required (all other are optional). */interface ZoneSpec {    /**     * The name of the zone. Useful when debugging Zones.     */    name: string;    /**     * A set of properties to be associated with Zone. Use [Zone.get] to retrieve them.     */    properties?: {        [key: string]: any;    };    /**     * Allows the interception of zone forking.     *     * When the zone is being forked, the request is forwarded to this method for interception.     *     * @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.     * @param currentZone The current [Zone] where the current interceptor has been declared.     * @param targetZone The [Zone] which originally received the request.     * @param zoneSpec The argument passed into the `fork` method.     */    onFork?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, zoneSpec: ZoneSpec) => Zone;    /**     * Allows interception of the wrapping of the callback.     *     * @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.     * @param currentZone The current [Zone] where the current interceptor has been declared.     * @param targetZone The [Zone] which originally received the request.     * @param delegate The argument passed into the `wrap` method.     * @param source The argument passed into the `wrap` method.     */    onIntercept?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, delegate: Function, source: string) => Function;    /**     * Allows interception of the callback invocation.     *     * @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.     * @param currentZone The current [Zone] where the current interceptor has been declared.     * @param targetZone The [Zone] which originally received the request.     * @param delegate The argument passed into the `run` method.     * @param applyThis The argument passed into the `run` method.     * @param applyArgs The argument passed into the `run` method.     * @param source The argument passed into the `run` method.     */    onInvoke?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, delegate: Function, applyThis: any, applyArgs?: any[], source?: string) => any;    /**     * Allows interception of the error handling.     *     * @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.     * @param currentZone The current [Zone] where the current interceptor has been declared.     * @param targetZone The [Zone] which originally received the request.     * @param error The argument passed into the `handleError` method.     */    onHandleError?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, error: any) => boolean;    /**     * Allows interception of task scheduling.     *     * @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.     * @param currentZone The current [Zone] where the current interceptor has been declared.     * @param targetZone The [Zone] which originally received the request.     * @param task The argument passed into the `scheduleTask` method.     */    onScheduleTask?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task) => Task;    onInvokeTask?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task, applyThis: any, applyArgs?: any[]) => any;    /**     * Allows interception of task cancellation.     *     * @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.     * @param currentZone The current [Zone] where the current interceptor has been declared.     * @param targetZone The [Zone] which originally received the request.     * @param task The argument passed into the `cancelTask` method.     */    onCancelTask?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task) => any;    /**     * Notifies of changes to the task queue empty status.     *     * @param parentZoneDelegate Delegate which performs the parent [ZoneSpec] operation.     * @param currentZone The current [Zone] where the current interceptor has been declared.     * @param targetZone The [Zone] which originally received the request.     * @param hasTaskState     */    onHasTask?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, hasTaskState: HasTaskState) => void;}/** *  A delegate when intercepting zone operations. * *  A ZoneDelegate is needed because a child zone can't simply invoke a method on a parent zone. For *  example a child zone wrap can't just call parent zone wrap. Doing so would create a callback *  which is bound to the parent zone. What we are interested in is intercepting the callback before *  it is bound to any zone. Furthermore, we also need to pass the targetZone (zone which received *  the original request) to the delegate. * *  The ZoneDelegate methods mirror those of Zone with an addition of extra targetZone argument in *  the method signature. (The original Zone which received the request.) Some methods are renamed *  to prevent confusion, because they have slightly different semantics and arguments. * *  - `wrap` => `intercept`: The `wrap` method delegates to `intercept`. The `wrap` method returns *     a callback which will run in a given zone, where as intercept allows wrapping the callback *     so that additional code can be run before and after, but does not associate the callback *     with the zone. *  - `run` => `invoke`: The `run` method delegates to `invoke` to perform the actual execution of *     the callback. The `run` method switches to new zone; saves and restores the `Zone.current`; *     and optionally performs error handling. The invoke is not responsible for error handling, *     or zone management. * *  Not every method is usually overwritten in the child zone, for this reason the ZoneDelegate *  stores the closest zone which overwrites this behavior along with the closest ZoneSpec. * *  NOTE: We have tried to make this API analogous to Event bubbling with target and current *  properties. * *  Note: The ZoneDelegate treats ZoneSpec as class. This allows the ZoneSpec to use its `this` to *  store internal state. */interface ZoneDelegate {    zone: Zone;    fork(targetZone: Zone, zoneSpec: ZoneSpec): Zone;    intercept(targetZone: Zone, callback: Function, source: string): Function;    invoke(targetZone: Zone, callback: Function, applyThis?: any, applyArgs?: any[], source?: string): any;    handleError(targetZone: Zone, error: any): boolean;    scheduleTask(targetZone: Zone, task: Task): Task;    invokeTask(targetZone: Zone, task: Task, applyThis?: any, applyArgs?: any[]): any;    cancelTask(targetZone: Zone, task: Task): any;    hasTask(targetZone: Zone, isEmpty: HasTaskState): void;}type HasTaskState = {    microTask: boolean;    macroTask: boolean;    eventTask: boolean;    change: TaskType;};/** * Task type: `microTask`, `macroTask`, `eventTask`. */type TaskType = 'microTask' | 'macroTask' | 'eventTask';/** * Task type: `notScheduled`, `scheduling`, `scheduled`, `running`, `canceling`, 'unknown'. */type TaskState = 'notScheduled' | 'scheduling' | 'scheduled' | 'running' | 'canceling' | 'unknown';/** */interface TaskData {    /**     * A periodic [MacroTask] is such which get automatically rescheduled after it is executed.     */    isPeriodic?: boolean;    /**     * Delay in milliseconds when the Task will run.     */    delay?: number;    /**     * identifier returned by the native setTimeout.     */    handleId?: number;}/** * Represents work which is executed with a clean stack. * * Tasks are used in Zones to mark work which is performed on clean stack frame. There are three * kinds of task. [MicroTask], [MacroTask], and [EventTask]. * * A JS VM can be modeled as a [MicroTask] queue, [MacroTask] queue, and [EventTask] set. * * - [MicroTask] queue represents a set of tasks which are executing right after the current stack *   frame becomes clean and before a VM yield. All [MicroTask]s execute in order of insertion *   before VM yield and the next [MacroTask] is executed. * - [MacroTask] queue represents a set of tasks which are executed one at a time after each VM *   yield. The queue is ordered by time, and insertions can happen in any location. * - [EventTask] is a set of tasks which can at any time be inserted to the end of the [MacroTask] *   queue. This happens when the event fires. * */interface Task {    /**     * Task type: `microTask`, `macroTask`, `eventTask`.     */    type: TaskType;    /**     * Task state: `notScheduled`, `scheduling`, `scheduled`, `running`, `canceling`, `unknown`.     */    state: TaskState;    /**     * Debug string representing the API which requested the scheduling of the task.     */    source: string;    /**     * The Function to be used by the VM upon entering the [Task]. This function will delegate to     * [Zone.runTask] and delegate to `callback`.     */    invoke: Function;    /**     * Function which needs to be executed by the Task after the [Zone.currentTask] has been set to     * the current task.     */    callback: Function;    /**     * Task specific options associated with the current task. This is passed to the `scheduleFn`.     */    data?: TaskData;    /**     * Represents the default work which needs to be done to schedule the Task by the VM.     *     * A zone may choose to intercept this function and perform its own scheduling.     */    scheduleFn?: (task: Task) => void;    /**     * Represents the default work which needs to be done to un-schedule the Task from the VM. Not all     * Tasks are cancelable, and therefore this method is optional.     *     * A zone may chose to intercept this function and perform its own un-scheduling.     */    cancelFn?: (task: Task) => void;    /**     * @type {Zone} The zone which will be used to invoke the `callback`. The Zone is captured     * at the time of Task creation.     */    readonly zone: Zone;    /**     * Number of times the task has been executed, or -1 if canceled.     */    runCount: number;    /**     * Cancel the scheduling request. This method can be called from `ZoneSpec.onScheduleTask` to     * cancel the current scheduling interception. Once canceled the task can be discarded or     * rescheduled using `Zone.scheduleTask` on a different zone.     */    cancelScheduleRequest(): void;}interface MicroTask extends Task {    type: 'microTask';}interface MacroTask extends Task {    type: 'macroTask';}interface EventTask extends Task {    type: 'eventTask';}declare const Zone: ZoneType;/** * @license * Copyright Google LLC 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 *//** * Additional `EventTarget` methods added by `Zone.js`. * * 1. removeAllListeners, remove all event listeners of the given event name. * 2. eventListeners, get all event listeners of the given event name. */interface EventTarget {  /**   *   * Remove all event listeners by name for this event target.   *   * This method is optional because it may not be available if you use `noop zone` when   * bootstrapping Angular application or disable the `EventTarget` monkey patch by `zone.js`.   *   * If the `eventName` is provided, will remove event listeners of that name.   * If the `eventName` is not provided, will remove all event listeners associated with   * `EventTarget`.   *   * @param eventName the name of the event, such as `click`. This parameter is optional.   */  removeAllListeners?(eventName?: string): void;  /**   *   * Retrieve all event listeners by name.   *   * This method is optional because it may not be available if you use `noop zone` when   * bootstrapping Angular application or disable the `EventTarget` monkey patch by `zone.js`.   *   * If the `eventName` is provided, will return an array of event handlers or event listener   * objects of the given event.   * If the `eventName` is not provided, will return all listeners.   *   * @param eventName the name of the event, such as click. This parameter is optional.   */  eventListeners?(eventName?: string): EventListenerOrEventListenerObject[];}/** * @license * Copyright Google LLC 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 *//** * Interface of `zone.js` configurations. * * You can define the following configurations on the `window/global` object before * importing `zone.js` to change `zone.js` default behaviors. */interface ZoneGlobalConfigurations {  /**   * Disable the monkey patch of the `Node.js` `EventEmitter` API.   *   * By default, `zone.js` monkey patches the `Node.js` `EventEmitter` APIs to make asynchronous   * callbacks of those APIs in the same zone when scheduled.   *   * Consider the following example:   *   * ```   * const EventEmitter = require('events');   * class MyEmitter extends EventEmitter {}   * const myEmitter = new MyEmitter();   *   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   myEmitter.on('event', () => {   *     console.log('an event occurs in the zone', Zone.current.name);   *     // the callback runs in the zone when it is scheduled,   *     // so the output is 'an event occurs in the zone myZone'.   *   });   * });   * myEmitter.emit('event');   * ```   *   * If you set `__Zone_disable_EventEmitter = true` before importing `zone.js`,   * `zone.js` does not monkey patch the `EventEmitter` APIs and the above code   * outputs 'an event occurred <root>'.   */  __Zone_disable_EventEmitter?: boolean;  /**   * Disable the monkey patch of the `Node.js` `fs` API.   *   * By default, `zone.js` monkey patches `Node.js` `fs` APIs to make asynchronous callbacks of   * those APIs in the same zone when scheduled.   *   * Consider the following example:   *   * ```   * const fs = require('fs');   *   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   fs.stat('/tmp/world', (err, stats) => {   *     console.log('fs.stats() callback is invoked in the zone', Zone.current.name);   *     // since the callback of the `fs.stat()` runs in the same zone   *     // when it is called, so the output is 'fs.stats() callback is invoked in the zone myZone'.   *   });   * });   * ```   *   * If you set `__Zone_disable_fs = true` before importing `zone.js`,   * `zone.js` does not monkey patch the `fs` API and the above code   * outputs 'get stats occurred <root>'.   */  __Zone_disable_fs?: boolean;  /**   * Disable the monkey patch of the `Node.js` `timer` API.   *   * By default, `zone.js` monkey patches the `Node.js` `timer` APIs to make asynchronous   * callbacks of those APIs in the same zone when scheduled.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   setTimeout(() => {   *     console.log('setTimeout() callback is invoked in the zone', Zone.current.name);   *     // since the callback of `setTimeout()` runs in the same zone   *     // when it is scheduled, so the output is 'setTimeout() callback is invoked in the zone   *     // myZone'.   *   });   * });   * ```   *   * If you set `__Zone_disable_timers = true` before importing `zone.js`,   * `zone.js` does not monkey patch the `timer` APIs and the above code   * outputs 'timeout <root>'.   */  __Zone_disable_node_timers?: boolean;  /**   * Disable the monkey patch of the `Node.js` `process.nextTick()` API.   *   * By default, `zone.js` monkey patches the `Node.js` `process.nextTick()` API to make the   * callback in the same zone when calling `process.nextTick()`.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   process.nextTick(() => {   *     console.log('process.nextTick() callback is invoked in the zone', Zone.current.name);   *     // since the callback of `process.nextTick()` runs in the same zone   *     // when it is scheduled, so the output is 'process.nextTick() callback is invoked in the   *     // zone myZone'.   *   });   * });   * ```   *   * If you set `__Zone_disable_nextTick = true` before importing `zone.js`,   * `zone.js` does not monkey patch the `process.nextTick()` API and the above code   * outputs 'nextTick <root>'.   */  __Zone_disable_nextTick?: boolean;  /**   * Disable the monkey patch of the `Node.js` `crypto` API.   *   * By default, `zone.js` monkey patches the `Node.js` `crypto` APIs to make asynchronous callbacks   * of those APIs in the same zone when called.   *   * Consider the following example:   *   * ```   * const crypto = require('crypto');   *   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   crypto.randomBytes(() => {   *     console.log('crypto.randomBytes() callback is invoked in the zone', Zone.current.name);   *     // since the callback of `crypto.randomBytes()` runs in the same zone   *     // when it is called, so the output is 'crypto.randomBytes() callback is invoked in the   *     // zone myZone'.   *   });   * });   * ```   *   * If you set `__Zone_disable_crypto = true` before importing `zone.js`,   * `zone.js` does not monkey patch the `crypto` API and the above code   * outputs 'crypto <root>'.   */  __Zone_disable_crypto?: boolean;  /**   * Disable the monkey patch of the `Object.defineProperty()` API.   *   * Note: This configuration is available only in the legacy bundle (dist/zone.js). This module is   * not available in the evergreen bundle (zone-evergreen.js).   *   * In the legacy browser, the default behavior of `zone.js` is to monkey patch   * `Object.defineProperty()` and `Object.create()` to try to ensure PropertyDescriptor parameter's   * configurable property to be true. This patch is only needed in some old mobile browsers.   *   * If you set `__Zone_disable_defineProperty = true` before importing `zone.js`,   * `zone.js` does not monkey patch the `Object.defineProperty()` API and does not   * modify desc.configurable to true.   *   */  __Zone_disable_defineProperty?: boolean;  /**   * Disable the monkey patch of the browser `registerElement()` API.   *   * NOTE: This configuration is only available in the legacy bundle (dist/zone.js), this   * module is not available in the evergreen bundle (zone-evergreen.js).   *   * In the legacy browser, the default behavior of `zone.js` is to monkey patch the   * `registerElement()` API to make asynchronous callbacks of the API in the same zone when   * `registerElement()` is called.   *   * Consider the following example:   *   * ```   * const proto = Object.create(HTMLElement.prototype);   * proto.createdCallback = function() {   *   console.log('createdCallback is invoked in the zone', Zone.current.name);   * };   * proto.attachedCallback = function() {   *   console.log('attachedCallback is invoked in the zone', Zone.current.name);   * };   * proto.detachedCallback = function() {   *   console.log('detachedCallback is invoked in the zone', Zone.current.name);   * };   * proto.attributeChangedCallback = function() {   *   console.log('attributeChangedCallback is invoked in the zone', Zone.current.name);   * };   *   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   document.registerElement('x-elem', {prototype: proto});   * });   * ```   *   * When these callbacks are invoked, those callbacks will be in the zone when   * `registerElement()` is called.   *   * If you set `__Zone_disable_registerElement = true` before importing `zone.js`,   * `zone.js` does not monkey patch `registerElement()` API and the above code   * outputs '<root>'.   */  __Zone_disable_registerElement?: boolean;  /**   * Disable the monkey patch of the browser legacy `EventTarget` API.   *   * NOTE: This configuration is only available in the legacy bundle (dist/zone.js), this module   * is not available in the evergreen bundle (zone-evergreen.js).   *   * In some old browsers, the `EventTarget` is not available, so `zone.js` cannot directly monkey   * patch the `EventTarget`. Instead, `zone.js` patches all known HTML elements' prototypes (such   * as `HtmlDivElement`). The callback of the `addEventListener()` will be in the same zone when   * the `addEventListener()` is called.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   div.addEventListener('click', () => {   *     console.log('div click event listener is invoked in the zone', Zone.current.name);   *     // the output is 'div click event listener is invoked in the zone myZone'.   *   });   * });   * ```   *   * If you set `__Zone_disable_EventTargetLegacy = true` before importing `zone.js`   * In some old browsers, where `EventTarget` is not available, if you set   * `__Zone_disable_EventTargetLegacy = true` before importing `zone.js`, `zone.js` does not monkey   * patch all HTML element APIs and the above code outputs 'clicked <root>'.   */  __Zone_disable_EventTargetLegacy?: boolean;  /**   * Disable the monkey patch of the browser `timer` APIs.   *   * By default, `zone.js` monkey patches browser timer   * APIs (`setTimeout()`/`setInterval()`/`setImmediate()`) to make asynchronous callbacks of those   * APIs in the same zone when scheduled.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   setTimeout(() => {   *     console.log('setTimeout() callback is invoked in the zone', Zone.current.name);   *     // since the callback of `setTimeout()` runs in the same zone   *     // when it is scheduled, so the output is 'setTimeout() callback is invoked in the zone   *     // myZone'.   *   });   * });   * ```   *   * If you set `__Zone_disable_timers = true` before importing `zone.js`,   * `zone.js` does not monkey patch `timer` API and the above code   * outputs 'timeout <root>'.   *   */  __Zone_disable_timers?: boolean;  /**   * Disable the monkey patch of the browser `requestAnimationFrame()` API.   *   * By default, `zone.js` monkey patches the browser `requestAnimationFrame()` API   * to make the asynchronous callback of the `requestAnimationFrame()` in the same zone when   * scheduled.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   requestAnimationFrame(() => {   *     console.log('requestAnimationFrame() callback is invoked in the zone', Zone.current.name);   *     // since the callback of `requestAnimationFrame()` will be in the same zone   *     // when it is scheduled, so the output will be 'requestAnimationFrame() callback is invoked   *     // in the zone myZone'   *   });   * });   * ```   *   * If you set `__Zone_disable_requestAnimationFrame = true` before importing `zone.js`,   * `zone.js` does not monkey patch the `requestAnimationFrame()` API and the above code   * outputs 'raf <root>'.   */  __Zone_disable_requestAnimationFrame?: boolean;  /**   *   * Disable the monkey patching of the `queueMicrotask()` API.   *   * By default, `zone.js` monkey patches the `queueMicrotask()` API   * to ensure that `queueMicrotask()` callback is invoked in the same zone as zone used to invoke   * `queueMicrotask()`. And also the callback is running as `microTask` like   * `Promise.prototype.then()`.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   queueMicrotask(() => {   *     console.log('queueMicrotask() callback is invoked in the zone', Zone.current.name);   *     // Since `queueMicrotask()` was invoked in `myZone`, same zone is restored   *     // when 'queueMicrotask() callback is invoked, resulting in `myZone` being console logged.   *   });   * });   * ```   *   * If you set `__Zone_disable_queueMicrotask = true` before importing `zone.js`,   * `zone.js` does not monkey patch the `queueMicrotask()` API and the above code   * output will change to: 'queueMicrotask() callback is invoked in the zone <root>'.   */  __Zone_disable_queueMicrotask?: boolean;  /**   *   * Disable the monkey patch of the browser blocking APIs(`alert()`/`prompt()`/`confirm()`).   */  __Zone_disable_blocking?: boolean;  /**   * Disable the monkey patch of the browser `EventTarget` APIs.   *   * By default, `zone.js` monkey patches EventTarget APIs. The callbacks of the   * `addEventListener()` run in the same zone when the `addEventListener()` is called.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   div.addEventListener('click', () => {   *     console.log('div event listener is invoked in the zone', Zone.current.name);   *     // the output is 'div event listener is invoked in the zone myZone'.   *   });   * });   * ```   *   * If you set `__Zone_disable_EventTarget = true` before importing `zone.js`,   * `zone.js` does not monkey patch EventTarget API and the above code   * outputs 'clicked <root>'.   *   */  __Zone_disable_EventTarget?: boolean;  /**   * Disable the monkey patch of the browser `FileReader` APIs.   */  __Zone_disable_FileReader?: boolean;  /**   * Disable the monkey patch of the browser `MutationObserver` APIs.   */  __Zone_disable_MutationObserver?: boolean;  /**   * Disable the monkey patch of the browser `IntersectionObserver` APIs.   */  __Zone_disable_IntersectionObserver?: boolean;  /**   * Disable the monkey patch of the browser onProperty APIs(such as onclick).   *   * By default, `zone.js` monkey patches onXXX properties (such as onclick). The callbacks of onXXX   * properties run in the same zone when the onXXX properties is set.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({name: 'myZone'});   * zone.run(() => {   *   div.onclick = () => {   *     console.log('div click event listener is invoked in the zone', Zone.current.name);   *     // the output will be 'div click event listener is invoked in the zone myZone'   *   }   * });   * ```   *   * If you set `__Zone_disable_on_property = true` before importing `zone.js`,   * `zone.js` does not monkey patch onXXX properties and the above code   * outputs 'clicked <root>'.   *   */  __Zone_disable_on_property?: boolean;  /**   * Disable the monkey patch of the browser `customElements` APIs.   *   * By default, `zone.js` monkey patches `customElements` APIs to make callbacks run in the   * same zone when the `customElements.define()` is called.   *   * Consider the following example:   *   * ```   * class TestCustomElement extends HTMLElement {   *   constructor() { super(); }   *   connectedCallback() {}   *   disconnectedCallback() {}   *   attributeChangedCallback(attrName, oldVal, newVal) {}   *   adoptedCallback() {}   * }   *   * const zone = Zone.fork({name: 'myZone'});   * zone.run(() => {   *   customElements.define('x-elem', TestCustomElement);   * });   * ```   *   * All those callbacks defined in TestCustomElement runs in the zone when   * the `customElements.define()` is called.   *   * If you set `__Zone_disable_customElements = true` before importing `zone.js`,   * `zone.js` does not monkey patch `customElements` APIs and the above code   * runs inside <root> zone.   */  __Zone_disable_customElements?: boolean;  /**   * Disable the monkey patch of the browser `XMLHttpRequest` APIs.   *   * By default, `zone.js` monkey patches `XMLHttpRequest` APIs to make XMLHttpRequest act   * as macroTask.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({   *   name: 'myZone',   *   onScheduleTask: (delegate, curr, target, task) => {   *     console.log('task is scheduled', task.type, task.source, task.zone.name);   *     return delegate.scheduleTask(target, task);   *   }   * })   * const xhr = new XMLHttpRequest();   * zone.run(() => {   *   xhr.onload = function() {};   *   xhr.open('get', '/', true);   *   xhr.send();   * });   * ```   *   * In this example, the instance of XMLHttpRequest runs in the zone and acts as a macroTask. The   * output is 'task is scheduled macroTask, XMLHttpRequest.send, zone'.   *   * If you set `__Zone_disable_XHR = true` before importing `zone.js`,   * `zone.js` does not monkey patch `XMLHttpRequest` APIs and the above onScheduleTask callback   * will not be called.   *   */  __Zone_disable_XHR?: boolean;  /**   * Disable the monkey patch of the browser geolocation APIs.   *   * By default, `zone.js` monkey patches geolocation APIs to make callbacks run in the same zone   * when those APIs are called.   *   * Consider the following examples:   *   * ```   * const zone = Zone.current.fork({   *   name: 'myZone'   * });   *   * zone.run(() => {   *   navigator.geolocation.getCurrentPosition(pos => {   *     console.log('navigator.getCurrentPosition() callback is invoked in the zone',   *     Zone.current.name);   *     // output is 'navigator.getCurrentPosition() callback is invoked in the zone myZone'.   *   }   * });   * ```   *   * If set you `__Zone_disable_geolocation = true` before importing `zone.js`,   * `zone.js` does not monkey patch geolocation APIs and the above code   * outputs 'getCurrentPosition <root>'.   *   */  __Zone_disable_geolocation?: boolean;  /**   * Disable the monkey patch of the browser `canvas` APIs.   *   * By default, `zone.js` monkey patches `canvas` APIs to make callbacks run in the same zone when   * those APIs are called.   *   * Consider the following example:   *   * ```   * const zone = Zone.current.fork({   *   name: 'myZone'   * });   *   * zone.run(() => {   *   canvas.toBlob(blog => {   *     console.log('canvas.toBlob() callback is invoked in the zone', Zone.current.name);   *     // output is 'canvas.toBlob() callback is invoked in the zone myZone'.   *   }   * });   * ```   *   * If you set `__Zone_disable_canvas = true` before importing `zone.js`,   * `zone.js` does not monkey patch `canvas` APIs and the above code   * outputs 'canvas.toBlob <root>'.   */  __Zone_disable_canvas?: boolean;  /**   * Disable the `Promise` monkey patch.   *   * By default, `zone.js` monkey patches `Promise` APIs to make the `then()/catch()` callbacks in   * the same zone when those callbacks are called.   *   * Consider the following examples:   *   * ```   * const zone = Zone.current.fork({name: 'myZone'});   *   * const p = Promise.resolve(1);   *   * zone.run(() => {   *   p.then(() => {   *     console.log('then() callback is invoked in the zone', Zone.current.name);   *     // output is 'then() callback is invoked in the zone myZone'.   *   });   * });   * ```   *   * If you set `__Zone_disable_ZoneAwarePromise = true` before importing `zone.js`,   * `zone.js` does not monkey patch `Promise` APIs and the above code   * outputs 'promise then callback <root>'.   */  __Zone_disable_ZoneAwarePromise?: boolean;  /**   * Define event names that users don't want monkey patched by the `zone.js`.   *   * By default, `zone.js` monkey patches EventTarget.addEventListener(). The event listener   * callback runs in the same zone when the addEventListener() is called.   *   * Sometimes, you don't want all of the event names used in this patched version because it   * impacts performance. For example, you might want `scroll` or `mousemove` event listeners to run   * the native `addEventListener()` for better performance.   *   * Users can achieve this goal by defining `__zone_symbol__UNPATCHED_EVENTS = ['scroll',   * 'mousemove'];` before importing `zone.js`.   */  __zone_symbol__UNPATCHED_EVENTS?: string[];  /**   * Define the event names of the passive listeners.   *   * To add passive event listeners, you can use `elem.addEventListener('scroll', listener,   * {passive: true});` or implement your own `EventManagerPlugin`.   *   * You can also define a global variable as follows:   *   * ```   * __zone_symbol__PASSIVE_EVENTS = ['scroll'];   * ```   *   * The preceding code makes all scroll event listeners passive.   */  __zone_symbol__PASSIVE_EVENTS?: string[];  /**   * Disable wrapping uncaught promise rejection.   *   * By default, `zone.js` wraps the uncaught promise rejection in a new `Error` object   * which contains additional information such as a value of the rejection and a stack trace.   *   * If you set `__zone_symbol__DISABLE_WRAPPING_UNCAUGHT_PROMISE_REJECTION = true;` before   * importing `zone.js`, `zone.js` will not wrap the uncaught promise rejection.   */  __zone_symbol__DISABLE_WRAPPING_UNCAUGHT_PROMISE_REJECTION?: boolean;}/** * Interface of `zone-testing.js` test configurations. * * You can define the following configurations on the `window` or `global` object before * importing `zone-testing.js` to change `zone-testing.js` default behaviors in the test runner. */interface ZoneTestConfigurations {  /**   * Disable the Jasmine integration.   *   * In the `zone-testing.js` bundle, by default, `zone-testing.js` monkey patches Jasmine APIs   * to make Jasmine APIs run in specified zone.   *   * 1. Make the `describe()`/`xdescribe()`/`fdescribe()` methods run in the syncTestZone.   * 2. Make the `it()`/`xit()`/`fit()`/`beforeEach()`/`afterEach()`/`beforeAll()`/`afterAll()`   * methods run in the ProxyZone.   *   * With this patch, `async()`/`fakeAsync()` can work with the Jasmine runner.   *   * If you set `__Zone_disable_jasmine = true` before importing `zone-testing.js`,   * `zone-testing.js` does not monkey patch the jasmine APIs and the `async()`/`fakeAsync()` cannot   * work with the Jasmine runner any longer.   */  __Zone_disable_jasmine?: boolean;  /**   * Disable the Mocha integration.   *   * In the `zone-testing.js` bundle, by default, `zone-testing.js` monkey patches the Mocha APIs   * to make Mocha APIs run in the specified zone.   *   * 1. Make the `describe()`/`xdescribe()`/`fdescribe()` methods run in the syncTestZone.   * 2. Make the `it()`/`xit()`/`fit()`/`beforeEach()`/`afterEach()`/`beforeAll()`/`afterAll()`   * methods run in the ProxyZone.   *   * With this patch, `async()`/`fakeAsync()` can work with the Mocha runner.   *   * If you set `__Zone_disable_mocha = true` before importing `zone-testing.js`,   * `zone-testing.js` does not monkey patch the Mocha APIs and the `async()/`fakeAsync()` can not   * work with the Mocha runner any longer.   */  __Zone_disable_mocha?: boolean;  /**   * Disable the Jest integration.   *   * In the `zone-testing.js` bundle, by default, `zone-testing.js` monkey patches Jest APIs   * to make Jest APIs run in the specified zone.   *   * 1. Make the `describe()`/`xdescribe()`/`fdescribe()` methods run in the syncTestZone.   * 2. Make the `it()`/`xit()`/`fit()`/`beforeEach()`/`afterEach()`/`before()`/`after()` methods   * run in the ProxyZone.   *   * With this patch, `async()`/`fakeAsync()` can work with the Jest runner.   *   * If you set `__Zone_disable_jest = true` before importing `zone-testing.js`,   * `zone-testing.js` does not monkey patch the jest APIs and `async()`/`fakeAsync()` cannot   * work with the Jest runner any longer.   */  __Zone_disable_jest?: boolean;  /**   * Disable monkey patch the jasmine clock APIs.   *   * By default, `zone-testing.js` monkey patches the `jasmine.clock()` API,   * so the `jasmine.clock()` can work with the `fakeAsync()/tick()` API.   *   * Consider the following example:   *   * ```   * describe('jasmine.clock integration', () => {   *   beforeEach(() => {   *     jasmine.clock().install();   *   });   *   afterEach(() => {   *     jasmine.clock().uninstall();   *   });   *   it('fakeAsync test', fakeAsync(() => {   *     setTimeout(spy, 100);   *     expect(spy).not.toHaveBeenCalled();   *     jasmine.clock().tick(100);   *     expect(spy).toHaveBeenCalled();   *   }));   * });   * ```   *   * In the `fakeAsync()` method, `jasmine.clock().tick()` works just like `tick()`.   *   * If you set `__zone_symbol__fakeAsyncDisablePatchingClock = true` before importing   * `zone-testing.js`,`zone-testing.js` does not monkey patch the `jasmine.clock()` APIs and the   * `jasmine.clock()` cannot work with `fakeAsync()` any longer.   */  __zone_symbol__fakeAsyncDisablePatchingClock?: boolean;  /**   * Enable auto running into `fakeAsync()` when installing the `jasmine.clock()`.   *   * By default, `zone-testing.js` does not automatically run into `fakeAsync()`   * if the `jasmine.clock().install()` is called.   *   * Consider the following example:   *   * ```   * describe('jasmine.clock integration', () => {   *   beforeEach(() => {   *     jasmine.clock().install();   *   });   *   afterEach(() => {   *     jasmine.clock().uninstall();   *   });   *   it('fakeAsync test', fakeAsync(() => {   *     setTimeout(spy, 100);   *     expect(spy).not.toHaveBeenCalled();   *     jasmine.clock().tick(100);   *     expect(spy).toHaveBeenCalled();   *   }));   * });   * ```   *   * You must run `fakeAsync()` to make test cases in the `FakeAsyncTestZone`.   *   * If you set `__zone_symbol__fakeAsyncAutoFakeAsyncWhenClockPatched = true` before importing   * `zone-testing.js`, `zone-testing.js` can run test case automatically in the   * `FakeAsyncTestZone` without calling the `fakeAsync()`.   *   * Consider the following example:   *   * ```   * describe('jasmine.clock integration', () => {   *   beforeEach(() => {   *     jasmine.clock().install();   *   });   *   afterEach(() => {   *     jasmine.clock().uninstall();   *   });   *   it('fakeAsync test', () => { // here we don't need to call fakeAsync   *     setTimeout(spy, 100);   *     expect(spy).not.toHaveBeenCalled();   *     jasmine.clock().tick(100);   *     expect(spy).toHaveBeenCalled();   *   });   * });   * ```   *   */  __zone_symbol__fakeAsyncAutoFakeAsyncWhenClockPatched?: boolean;  /**   * Enable waiting for the unresolved promise in the `async()` test.   *   * In the `async()` test, `AsyncTestZone` waits for all the asynchronous tasks to finish. By   * default, if some promises remain unresolved, `AsyncTestZone` does not wait and reports that it   * received an unexpected result.   *   * Consider the following example:   *   * ```   * describe('wait never resolved promise', () => {   *   it('async with never resolved promise test', async(() => {   *     const p = new Promise(() => {});   *     p.then(() => {   *       // do some expectation.   *     });   *   }))   * });   * ```   *   * By default, this case passes, because the callback of `p.then()` is never called. Because `p`   * is an unresolved promise, there is no pending asynchronous task, which means the `async()`   * method does not wait.   *   * If you set `__zone_symbol__supportWaitUnResolvedChainedPromise = true`, the above case   * times out, because `async()` will wait for the unresolved promise.   */  __zone_symbol__supportWaitUnResolvedChainedPromise?: boolean;}/** * The interface of the `zone.js` runtime configurations. * * These configurations can be defined on the `Zone` object after * importing zone.js to change behaviors. The differences between * the `ZoneRuntimeConfigurations` and the `ZoneGlobalConfigurations` are, * * 1. `ZoneGlobalConfigurations` must be defined on the `global/window` object before importing * `zone.js`. The value of the configuration cannot be changed at runtime. * * 2. `ZoneRuntimeConfigurations` must be defined on the `Zone` object after importing `zone.js`. * You can change the value of this configuration at runtime. * */interface ZoneRuntimeConfigurations {  /**   * Ignore outputting errors to the console when uncaught Promise errors occur.   *   * By default, if an uncaught Promise error occurs, `zone.js` outputs the   * error to the console by calling `console.error()`.   *   * If you set `__zone_symbol__ignoreConsoleErrorUncaughtError = true`, `zone.js` does not output   * the uncaught error to `console.error()`.   */  __zone_symbol__ignoreConsoleErrorUncaughtError?: boolean;}
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