@angular/router
Version:
Angular - the routing library
357 lines • 48.2 kB
JavaScript
/**
* @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.dev/license
*/
import { ChangeDetectorRef, Directive, EventEmitter, inject, Injectable, InjectionToken, Input, Output, reflectComponentType, ViewContainerRef, ɵRuntimeError as RuntimeError, } from '@angular/core';
import { combineLatest, of } from 'rxjs';
import { switchMap } from 'rxjs/operators';
import { ChildrenOutletContexts } from '../router_outlet_context';
import { ActivatedRoute } from '../router_state';
import { PRIMARY_OUTLET } from '../shared';
import * as i0 from "@angular/core";
/**
* @description
*
* Acts as a placeholder that Angular dynamically fills based on the current router state.
*
* Each outlet can have a unique name, determined by the optional `name` attribute.
* The name cannot be set or changed dynamically. If not set, default value is "primary".
*
* ```
* <router-outlet></router-outlet>
* <router-outlet name='left'></router-outlet>
* <router-outlet name='right'></router-outlet>
* ```
*
* Named outlets can be the targets of secondary routes.
* The `Route` object for a secondary route has an `outlet` property to identify the target outlet:
*
* `{path: <base-path>, component: <component>, outlet: <target_outlet_name>}`
*
* Using named outlets and secondary routes, you can target multiple outlets in
* the same `RouterLink` directive.
*
* The router keeps track of separate branches in a navigation tree for each named outlet and
* generates a representation of that tree in the URL.
* The URL for a secondary route uses the following syntax to specify both the primary and secondary
* routes at the same time:
*
* `http://base-path/primary-route-path(outlet-name:route-path)`
*
* A router outlet emits an activate event when a new component is instantiated,
* deactivate event when a component is destroyed.
* An attached event emits when the `RouteReuseStrategy` instructs the outlet to reattach the
* subtree, and the detached event emits when the `RouteReuseStrategy` instructs the outlet to
* detach the subtree.
*
* ```
* <router-outlet
* (activate)='onActivate($event)'
* (deactivate)='onDeactivate($event)'
* (attach)='onAttach($event)'
* (detach)='onDetach($event)'></router-outlet>
* ```
*
* @see {@link RouterLink}
* @see {@link Route}
* @ngModule RouterModule
*
* @publicApi
*/
export class RouterOutlet {
constructor() {
this.activated = null;
this._activatedRoute = null;
/**
* The name of the outlet
*
*/
this.name = PRIMARY_OUTLET;
this.activateEvents = new EventEmitter();
this.deactivateEvents = new EventEmitter();
/**
* Emits an attached component instance when the `RouteReuseStrategy` instructs to re-attach a
* previously detached subtree.
**/
this.attachEvents = new EventEmitter();
/**
* Emits a detached component instance when the `RouteReuseStrategy` instructs to detach the
* subtree.
*/
this.detachEvents = new EventEmitter();
this.parentContexts = inject(ChildrenOutletContexts);
this.location = inject(ViewContainerRef);
this.changeDetector = inject(ChangeDetectorRef);
this.inputBinder = inject(INPUT_BINDER, { optional: true });
/** @nodoc */
this.supportsBindingToComponentInputs = true;
}
/** @internal */
get activatedComponentRef() {
return this.activated;
}
/** @nodoc */
ngOnChanges(changes) {
if (changes['name']) {
const { firstChange, previousValue } = changes['name'];
if (firstChange) {
// The first change is handled by ngOnInit. Because ngOnChanges doesn't get called when no
// input is set at all, we need to centrally handle the first change there.
return;
}
// unregister with the old name
if (this.isTrackedInParentContexts(previousValue)) {
this.deactivate();
this.parentContexts.onChildOutletDestroyed(previousValue);
}
// register the new name
this.initializeOutletWithName();
}
}
/** @nodoc */
ngOnDestroy() {
// Ensure that the registered outlet is this one before removing it on the context.
if (this.isTrackedInParentContexts(this.name)) {
this.parentContexts.onChildOutletDestroyed(this.name);
}
this.inputBinder?.unsubscribeFromRouteData(this);
}
isTrackedInParentContexts(outletName) {
return this.parentContexts.getContext(outletName)?.outlet === this;
}
/** @nodoc */
ngOnInit() {
this.initializeOutletWithName();
}
initializeOutletWithName() {
this.parentContexts.onChildOutletCreated(this.name, this);
if (this.activated) {
return;
}
// If the outlet was not instantiated at the time the route got activated we need to populate
// the outlet when it is initialized (ie inside a NgIf)
const context = this.parentContexts.getContext(this.name);
if (context?.route) {
if (context.attachRef) {
// `attachRef` is populated when there is an existing component to mount
this.attach(context.attachRef, context.route);
}
else {
// otherwise the component defined in the configuration is created
this.activateWith(context.route, context.injector);
}
}
}
get isActivated() {
return !!this.activated;
}
/**
* @returns The currently activated component instance.
* @throws An error if the outlet is not activated.
*/
get component() {
if (!this.activated)
throw new RuntimeError(4012 /* RuntimeErrorCode.OUTLET_NOT_ACTIVATED */, (typeof ngDevMode === 'undefined' || ngDevMode) && 'Outlet is not activated');
return this.activated.instance;
}
get activatedRoute() {
if (!this.activated)
throw new RuntimeError(4012 /* RuntimeErrorCode.OUTLET_NOT_ACTIVATED */, (typeof ngDevMode === 'undefined' || ngDevMode) && 'Outlet is not activated');
return this._activatedRoute;
}
get activatedRouteData() {
if (this._activatedRoute) {
return this._activatedRoute.snapshot.data;
}
return {};
}
/**
* Called when the `RouteReuseStrategy` instructs to detach the subtree
*/
detach() {
if (!this.activated)
throw new RuntimeError(4012 /* RuntimeErrorCode.OUTLET_NOT_ACTIVATED */, (typeof ngDevMode === 'undefined' || ngDevMode) && 'Outlet is not activated');
this.location.detach();
const cmp = this.activated;
this.activated = null;
this._activatedRoute = null;
this.detachEvents.emit(cmp.instance);
return cmp;
}
/**
* Called when the `RouteReuseStrategy` instructs to re-attach a previously detached subtree
*/
attach(ref, activatedRoute) {
this.activated = ref;
this._activatedRoute = activatedRoute;
this.location.insert(ref.hostView);
this.inputBinder?.bindActivatedRouteToOutletComponent(this);
this.attachEvents.emit(ref.instance);
}
deactivate() {
if (this.activated) {
const c = this.component;
this.activated.destroy();
this.activated = null;
this._activatedRoute = null;
this.deactivateEvents.emit(c);
}
}
activateWith(activatedRoute, environmentInjector) {
if (this.isActivated) {
throw new RuntimeError(4013 /* RuntimeErrorCode.OUTLET_ALREADY_ACTIVATED */, (typeof ngDevMode === 'undefined' || ngDevMode) &&
'Cannot activate an already activated outlet');
}
this._activatedRoute = activatedRoute;
const location = this.location;
const snapshot = activatedRoute.snapshot;
const component = snapshot.component;
const childContexts = this.parentContexts.getOrCreateContext(this.name).children;
const injector = new OutletInjector(activatedRoute, childContexts, location.injector);
this.activated = location.createComponent(component, {
index: location.length,
injector,
environmentInjector: environmentInjector,
});
// Calling `markForCheck` to make sure we will run the change detection when the
// `RouterOutlet` is inside a `ChangeDetectionStrategy.OnPush` component.
this.changeDetector.markForCheck();
this.inputBinder?.bindActivatedRouteToOutletComponent(this);
this.activateEvents.emit(this.activated.instance);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.8", ngImport: i0, type: RouterOutlet, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.2.8", type: RouterOutlet, isStandalone: true, selector: "router-outlet", inputs: { name: "name" }, outputs: { activateEvents: "activate", deactivateEvents: "deactivate", attachEvents: "attach", detachEvents: "detach" }, exportAs: ["outlet"], usesOnChanges: true, ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.8", ngImport: i0, type: RouterOutlet, decorators: [{
type: Directive,
args: [{
selector: 'router-outlet',
exportAs: 'outlet',
standalone: true,
}]
}], propDecorators: { name: [{
type: Input
}], activateEvents: [{
type: Output,
args: ['activate']
}], deactivateEvents: [{
type: Output,
args: ['deactivate']
}], attachEvents: [{
type: Output,
args: ['attach']
}], detachEvents: [{
type: Output,
args: ['detach']
}] } });
class OutletInjector {
/**
* This injector has a special handing for the `ActivatedRoute` and
* `ChildrenOutletContexts` tokens: it returns corresponding values for those
* tokens dynamically. This behavior is different from the regular injector logic,
* when we initialize and store a value, which is later returned for all inject
* requests.
*
* In some cases (e.g. when using `@defer`), this dynamic behavior requires special
* handling. This function allows to identify an instance of the `OutletInjector` and
* create an instance of it without referring to the class itself (so this logic can
* be invoked from the `core` package). This helps to retain dynamic behavior for the
* mentioned tokens.
*
* Note: it's a temporary solution and we should explore how to support this case better.
*/
__ngOutletInjector(parentInjector) {
return new OutletInjector(this.route, this.childContexts, parentInjector);
}
constructor(route, childContexts, parent) {
this.route = route;
this.childContexts = childContexts;
this.parent = parent;
}
get(token, notFoundValue) {
if (token === ActivatedRoute) {
return this.route;
}
if (token === ChildrenOutletContexts) {
return this.childContexts;
}
return this.parent.get(token, notFoundValue);
}
}
export const INPUT_BINDER = new InjectionToken('');
/**
* Injectable used as a tree-shakable provider for opting in to binding router data to component
* inputs.
*
* The RouterOutlet registers itself with this service when an `ActivatedRoute` is attached or
* activated. When this happens, the service subscribes to the `ActivatedRoute` observables (params,
* queryParams, data) and sets the inputs of the component using `ComponentRef.setInput`.
* Importantly, when an input does not have an item in the route data with a matching key, this
* input is set to `undefined`. If it were not done this way, the previous information would be
* retained if the data got removed from the route (i.e. if a query parameter is removed).
*
* The `RouterOutlet` should unregister itself when destroyed via `unsubscribeFromRouteData` so that
* the subscriptions are cleaned up.
*/
export class RoutedComponentInputBinder {
constructor() {
this.outletDataSubscriptions = new Map();
}
bindActivatedRouteToOutletComponent(outlet) {
this.unsubscribeFromRouteData(outlet);
this.subscribeToRouteData(outlet);
}
unsubscribeFromRouteData(outlet) {
this.outletDataSubscriptions.get(outlet)?.unsubscribe();
this.outletDataSubscriptions.delete(outlet);
}
subscribeToRouteData(outlet) {
const { activatedRoute } = outlet;
const dataSubscription = combineLatest([
activatedRoute.queryParams,
activatedRoute.params,
activatedRoute.data,
])
.pipe(switchMap(([queryParams, params, data], index) => {
data = { ...queryParams, ...params, ...data };
// Get the first result from the data subscription synchronously so it's available to
// the component as soon as possible (and doesn't require a second change detection).
if (index === 0) {
return of(data);
}
// Promise.resolve is used to avoid synchronously writing the wrong data when
// two of the Observables in the `combineLatest` stream emit one after
// another.
return Promise.resolve(data);
}))
.subscribe((data) => {
// Outlet may have been deactivated or changed names to be associated with a different
// route
if (!outlet.isActivated ||
!outlet.activatedComponentRef ||
outlet.activatedRoute !== activatedRoute ||
activatedRoute.component === null) {
this.unsubscribeFromRouteData(outlet);
return;
}
const mirror = reflectComponentType(activatedRoute.component);
if (!mirror) {
this.unsubscribeFromRouteData(outlet);
return;
}
for (const { templateName } of mirror.inputs) {
outlet.activatedComponentRef.setInput(templateName, data[templateName]);
}
});
this.outletDataSubscriptions.set(outlet, dataSubscription);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.8", ngImport: i0, type: RoutedComponentInputBinder, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "18.2.8", ngImport: i0, type: RoutedComponentInputBinder }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.8", ngImport: i0, type: RoutedComponentInputBinder, decorators: [{
type: Injectable
}] });
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.dev/license\n */\n\nimport {\n  ChangeDetectorRef,\n  ComponentRef,\n  Directive,\n  EnvironmentInjector,\n  EventEmitter,\n  inject,\n  Injectable,\n  InjectionToken,\n  Injector,\n  Input,\n  OnDestroy,\n  OnInit,\n  Output,\n  reflectComponentType,\n  SimpleChanges,\n  ViewContainerRef,\n  ɵRuntimeError as RuntimeError,\n} from '@angular/core';\nimport {combineLatest, of, Subscription} from 'rxjs';\nimport {switchMap} from 'rxjs/operators';\n\nimport {RuntimeErrorCode} from '../errors';\nimport {Data} from '../models';\nimport {ChildrenOutletContexts} from '../router_outlet_context';\nimport {ActivatedRoute} from '../router_state';\nimport {PRIMARY_OUTLET} from '../shared';\n\n/**\n * An interface that defines the contract for developing a component outlet for the `Router`.\n *\n * An outlet acts as a placeholder that Angular dynamically fills based on the current router state.\n *\n * A router outlet should register itself with the `Router` via\n * `ChildrenOutletContexts#onChildOutletCreated` and unregister with\n * `ChildrenOutletContexts#onChildOutletDestroyed`. When the `Router` identifies a matched `Route`,\n * it looks for a registered outlet in the `ChildrenOutletContexts` and activates it.\n *\n * @see {@link ChildrenOutletContexts}\n * @publicApi\n */\nexport interface RouterOutletContract {\n  /**\n   * Whether the given outlet is activated.\n   *\n   * An outlet is considered \"activated\" if it has an active component.\n   */\n  isActivated: boolean;\n\n  /** The instance of the activated component or `null` if the outlet is not activated. */\n  component: Object | null;\n\n  /**\n   * The `Data` of the `ActivatedRoute` snapshot.\n   */\n  activatedRouteData: Data;\n\n  /**\n   * The `ActivatedRoute` for the outlet or `null` if the outlet is not activated.\n   */\n  activatedRoute: ActivatedRoute | null;\n\n  /**\n   * Called by the `Router` when the outlet should activate (create a component).\n   */\n  activateWith(activatedRoute: ActivatedRoute, environmentInjector: EnvironmentInjector): void;\n\n  /**\n   * A request to destroy the currently activated component.\n   *\n   * When a `RouteReuseStrategy` indicates that an `ActivatedRoute` should be removed but stored for\n   * later re-use rather than destroyed, the `Router` will call `detach` instead.\n   */\n  deactivate(): void;\n\n  /**\n   * Called when the `RouteReuseStrategy` instructs to detach the subtree.\n   *\n   * This is similar to `deactivate`, but the activated component should _not_ be destroyed.\n   * Instead, it is returned so that it can be reattached later via the `attach` method.\n   */\n  detach(): ComponentRef<unknown>;\n\n  /**\n   * Called when the `RouteReuseStrategy` instructs to re-attach a previously detached subtree.\n   */\n  attach(ref: ComponentRef<unknown>, activatedRoute: ActivatedRoute): void;\n\n  /**\n   * Emits an activate event when a new component is instantiated\n   **/\n  activateEvents?: EventEmitter<unknown>;\n\n  /**\n   * Emits a deactivate event when a component is destroyed.\n   */\n  deactivateEvents?: EventEmitter<unknown>;\n\n  /**\n   * Emits an attached component instance when the `RouteReuseStrategy` instructs to re-attach a\n   * previously detached subtree.\n   **/\n  attachEvents?: EventEmitter<unknown>;\n\n  /**\n   * Emits a detached component instance when the `RouteReuseStrategy` instructs to detach the\n   * subtree.\n   */\n  detachEvents?: EventEmitter<unknown>;\n\n  /**\n   * Used to indicate that the outlet is able to bind data from the `Router` to the outlet\n   * component's inputs.\n   *\n   * When this is `undefined` or `false` and the developer has opted in to the\n   * feature using `withComponentInputBinding`, a warning will be logged in dev mode if this outlet\n   * is used in the application.\n   */\n  readonly supportsBindingToComponentInputs?: true;\n}\n\n/**\n * @description\n *\n * Acts as a placeholder that Angular dynamically fills based on the current router state.\n *\n * Each outlet can have a unique name, determined by the optional `name` attribute.\n * The name cannot be set or changed dynamically. If not set, default value is \"primary\".\n *\n * ```\n * <router-outlet></router-outlet>\n * <router-outlet name='left'></router-outlet>\n * <router-outlet name='right'></router-outlet>\n * ```\n *\n * Named outlets can be the targets of secondary routes.\n * The `Route` object for a secondary route has an `outlet` property to identify the target outlet:\n *\n * `{path: <base-path>, component: <component>, outlet: <target_outlet_name>}`\n *\n * Using named outlets and secondary routes, you can target multiple outlets in\n * the same `RouterLink` directive.\n *\n * The router keeps track of separate branches in a navigation tree for each named outlet and\n * generates a representation of that tree in the URL.\n * The URL for a secondary route uses the following syntax to specify both the primary and secondary\n * routes at the same time:\n *\n * `http://base-path/primary-route-path(outlet-name:route-path)`\n *\n * A router outlet emits an activate event when a new component is instantiated,\n * deactivate event when a component is destroyed.\n * An attached event emits when the `RouteReuseStrategy` instructs the outlet to reattach the\n * subtree, and the detached event emits when the `RouteReuseStrategy` instructs the outlet to\n * detach the subtree.\n *\n * ```\n * <router-outlet\n *   (activate)='onActivate($event)'\n *   (deactivate)='onDeactivate($event)'\n *   (attach)='onAttach($event)'\n *   (detach)='onDetach($event)'></router-outlet>\n * ```\n *\n * @see {@link RouterLink}\n * @see {@link Route}\n * @ngModule RouterModule\n *\n * @publicApi\n */\n@Directive({\n  selector: 'router-outlet',\n  exportAs: 'outlet',\n  standalone: true,\n})\nexport class RouterOutlet implements OnDestroy, OnInit, RouterOutletContract {\n  private activated: ComponentRef<any> | null = null;\n  /** @internal */\n  get activatedComponentRef(): ComponentRef<any> | null {\n    return this.activated;\n  }\n  private _activatedRoute: ActivatedRoute | null = null;\n  /**\n   * The name of the outlet\n   *\n   */\n  @Input() name = PRIMARY_OUTLET;\n\n  @Output('activate') activateEvents = new EventEmitter<any>();\n  @Output('deactivate') deactivateEvents = new EventEmitter<any>();\n  /**\n   * Emits an attached component instance when the `RouteReuseStrategy` instructs to re-attach a\n   * previously detached subtree.\n   **/\n  @Output('attach') attachEvents = new EventEmitter<unknown>();\n  /**\n   * Emits a detached component instance when the `RouteReuseStrategy` instructs to detach the\n   * subtree.\n   */\n  @Output('detach') detachEvents = new EventEmitter<unknown>();\n\n  private parentContexts = inject(ChildrenOutletContexts);\n  private location = inject(ViewContainerRef);\n  private changeDetector = inject(ChangeDetectorRef);\n  private inputBinder = inject(INPUT_BINDER, {optional: true});\n  /** @nodoc */\n  readonly supportsBindingToComponentInputs = true;\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges) {\n    if (changes['name']) {\n      const {firstChange, previousValue} = changes['name'];\n      if (firstChange) {\n        // The first change is handled by ngOnInit. Because ngOnChanges doesn't get called when no\n        // input is set at all, we need to centrally handle the first change there.\n        return;\n      }\n\n      // unregister with the old name\n      if (this.isTrackedInParentContexts(previousValue)) {\n        this.deactivate();\n        this.parentContexts.onChildOutletDestroyed(previousValue);\n      }\n      // register the new name\n      this.initializeOutletWithName();\n    }\n  }\n\n  /** @nodoc */\n  ngOnDestroy(): void {\n    // Ensure that the registered outlet is this one before removing it on the context.\n    if (this.isTrackedInParentContexts(this.name)) {\n      this.parentContexts.onChildOutletDestroyed(this.name);\n    }\n    this.inputBinder?.unsubscribeFromRouteData(this);\n  }\n\n  private isTrackedInParentContexts(outletName: string) {\n    return this.parentContexts.getContext(outletName)?.outlet === this;\n  }\n\n  /** @nodoc */\n  ngOnInit(): void {\n    this.initializeOutletWithName();\n  }\n\n  private initializeOutletWithName() {\n    this.parentContexts.onChildOutletCreated(this.name, this);\n    if (this.activated) {\n      return;\n    }\n\n    // If the outlet was not instantiated at the time the route got activated we need to populate\n    // the outlet when it is initialized (ie inside a NgIf)\n    const context = this.parentContexts.getContext(this.name);\n    if (context?.route) {\n      if (context.attachRef) {\n        // `attachRef` is populated when there is an existing component to mount\n        this.attach(context.attachRef, context.route);\n      } else {\n        // otherwise the component defined in the configuration is created\n        this.activateWith(context.route, context.injector);\n      }\n    }\n  }\n\n  get isActivated(): boolean {\n    return !!this.activated;\n  }\n\n  /**\n   * @returns The currently activated component instance.\n   * @throws An error if the outlet is not activated.\n   */\n  get component(): Object {\n    if (!this.activated)\n      throw new RuntimeError(\n        RuntimeErrorCode.OUTLET_NOT_ACTIVATED,\n        (typeof ngDevMode === 'undefined' || ngDevMode) && 'Outlet is not activated',\n      );\n    return this.activated.instance;\n  }\n\n  get activatedRoute(): ActivatedRoute {\n    if (!this.activated)\n      throw new RuntimeError(\n        RuntimeErrorCode.OUTLET_NOT_ACTIVATED,\n        (typeof ngDevMode === 'undefined' || ngDevMode) && 'Outlet is not activated',\n      );\n    return this._activatedRoute as ActivatedRoute;\n  }\n\n  get activatedRouteData(): Data {\n    if (this._activatedRoute) {\n      return this._activatedRoute.snapshot.data;\n    }\n    return {};\n  }\n\n  /**\n   * Called when the `RouteReuseStrategy` instructs to detach the subtree\n   */\n  detach(): ComponentRef<any> {\n    if (!this.activated)\n      throw new RuntimeError(\n        RuntimeErrorCode.OUTLET_NOT_ACTIVATED,\n        (typeof ngDevMode === 'undefined' || ngDevMode) && 'Outlet is not activated',\n      );\n    this.location.detach();\n    const cmp = this.activated;\n    this.activated = null;\n    this._activatedRoute = null;\n    this.detachEvents.emit(cmp.instance);\n    return cmp;\n  }\n\n  /**\n   * Called when the `RouteReuseStrategy` instructs to re-attach a previously detached subtree\n   */\n  attach(ref: ComponentRef<any>, activatedRoute: ActivatedRoute) {\n    this.activated = ref;\n    this._activatedRoute = activatedRoute;\n    this.location.insert(ref.hostView);\n    this.inputBinder?.bindActivatedRouteToOutletComponent(this);\n    this.attachEvents.emit(ref.instance);\n  }\n\n  deactivate(): void {\n    if (this.activated) {\n      const c = this.component;\n      this.activated.destroy();\n      this.activated = null;\n      this._activatedRoute = null;\n      this.deactivateEvents.emit(c);\n    }\n  }\n\n  activateWith(activatedRoute: ActivatedRoute, environmentInjector: EnvironmentInjector) {\n    if (this.isActivated) {\n      throw new RuntimeError(\n        RuntimeErrorCode.OUTLET_ALREADY_ACTIVATED,\n        (typeof ngDevMode === 'undefined' || ngDevMode) &&\n          'Cannot activate an already activated outlet',\n      );\n    }\n    this._activatedRoute = activatedRoute;\n    const location = this.location;\n    const snapshot = activatedRoute.snapshot;\n    const component = snapshot.component!;\n    const childContexts = this.parentContexts.getOrCreateContext(this.name).children;\n    const injector = new OutletInjector(activatedRoute, childContexts, location.injector);\n\n    this.activated = location.createComponent(component, {\n      index: location.length,\n      injector,\n      environmentInjector: environmentInjector,\n    });\n    // Calling `markForCheck` to make sure we will run the change detection when the\n    // `RouterOutlet` is inside a `ChangeDetectionStrategy.OnPush` component.\n    this.changeDetector.markForCheck();\n    this.inputBinder?.bindActivatedRouteToOutletComponent(this);\n    this.activateEvents.emit(this.activated.instance);\n  }\n}\n\nclass OutletInjector implements Injector {\n  /**\n   * This injector has a special handing for the `ActivatedRoute` and\n   * `ChildrenOutletContexts` tokens: it returns corresponding values for those\n   * tokens dynamically. This behavior is different from the regular injector logic,\n   * when we initialize and store a value, which is later returned for all inject\n   * requests.\n   *\n   * In some cases (e.g. when using `@defer`), this dynamic behavior requires special\n   * handling. This function allows to identify an instance of the `OutletInjector` and\n   * create an instance of it without referring to the class itself (so this logic can\n   * be invoked from the `core` package). This helps to retain dynamic behavior for the\n   * mentioned tokens.\n   *\n   * Note: it's a temporary solution and we should explore how to support this case better.\n   */\n  private __ngOutletInjector(parentInjector: Injector) {\n    return new OutletInjector(this.route, this.childContexts, parentInjector);\n  }\n\n  constructor(\n    private route: ActivatedRoute,\n    private childContexts: ChildrenOutletContexts,\n    private parent: Injector,\n  ) {}\n\n  get(token: any, notFoundValue?: any): any {\n    if (token === ActivatedRoute) {\n      return this.route;\n    }\n\n    if (token === ChildrenOutletContexts) {\n      return this.childContexts;\n    }\n\n    return this.parent.get(token, notFoundValue);\n  }\n}\n\nexport const INPUT_BINDER = new InjectionToken<RoutedComponentInputBinder>('');\n\n/**\n * Injectable used as a tree-shakable provider for opting in to binding router data to component\n * inputs.\n *\n * The RouterOutlet registers itself with this service when an `ActivatedRoute` is attached or\n * activated. When this happens, the service subscribes to the `ActivatedRoute` observables (params,\n * queryParams, data) and sets the inputs of the component using `ComponentRef.setInput`.\n * Importantly, when an input does not have an item in the route data with a matching key, this\n * input is set to `undefined`. If it were not done this way, the previous information would be\n * retained if the data got removed from the route (i.e. if a query parameter is removed).\n *\n * The `RouterOutlet` should unregister itself when destroyed via `unsubscribeFromRouteData` so that\n * the subscriptions are cleaned up.\n */\n@Injectable()\nexport class RoutedComponentInputBinder {\n  private outletDataSubscriptions = new Map<RouterOutlet, Subscription>();\n\n  bindActivatedRouteToOutletComponent(outlet: RouterOutlet) {\n    this.unsubscribeFromRouteData(outlet);\n    this.subscribeToRouteData(outlet);\n  }\n\n  unsubscribeFromRouteData(outlet: RouterOutlet) {\n    this.outletDataSubscriptions.get(outlet)?.unsubscribe();\n    this.outletDataSubscriptions.delete(outlet);\n  }\n\n  private subscribeToRouteData(outlet: RouterOutlet) {\n    const {activatedRoute} = outlet;\n    const dataSubscription = combineLatest([\n      activatedRoute.queryParams,\n      activatedRoute.params,\n      activatedRoute.data,\n    ])\n      .pipe(\n        switchMap(([queryParams, params, data], index) => {\n          data = {...queryParams, ...params, ...data};\n          // Get the first result from the data subscription synchronously so it's available to\n          // the component as soon as possible (and doesn't require a second change detection).\n          if (index === 0) {\n            return of(data);\n          }\n          // Promise.resolve is used to avoid synchronously writing the wrong data when\n          // two of the Observables in the `combineLatest` stream emit one after\n          // another.\n          return Promise.resolve(data);\n        }),\n      )\n      .subscribe((data) => {\n        // Outlet may have been deactivated or changed names to be associated with a different\n        // route\n        if (\n          !outlet.isActivated ||\n          !outlet.activatedComponentRef ||\n          outlet.activatedRoute !== activatedRoute ||\n          activatedRoute.component === null\n        ) {\n          this.unsubscribeFromRouteData(outlet);\n          return;\n        }\n\n        const mirror = reflectComponentType(activatedRoute.component);\n        if (!mirror) {\n          this.unsubscribeFromRouteData(outlet);\n          return;\n        }\n\n        for (const {templateName} of mirror.inputs) {\n          outlet.activatedComponentRef.setInput(templateName, data[templateName]);\n        }\n      });\n\n    this.outletDataSubscriptions.set(outlet, dataSubscription);\n  }\n}\n"]}