@angular/router
Version:
Angular - the routing library
287 lines • 35.2 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.io/license
*/
import { LocationStrategy } from '@angular/common';
import { Attribute, Directive, ElementRef, HostBinding, HostListener, Input, Renderer2 } from '@angular/core';
import { Subject } from 'rxjs';
import { NavigationEnd } from '../events';
import { Router } from '../router';
import { ActivatedRoute } from '../router_state';
/**
* @description
*
* When applied to an element in a template, makes that element a link
* that initiates navigation to a route. Navigation opens one or more routed components
* in one or more `<router-outlet>` locations on the page.
*
* Given a route configuration `[{ path: 'user/:name', component: UserCmp }]`,
* the following creates a static link to the route:
* `<a routerLink="/user/bob">link to user component</a>`
*
* You can use dynamic values to generate the link.
* For a dynamic link, pass an array of path segments,
* followed by the params for each segment.
* For example, `['/team', teamId, 'user', userName, {details: true}]`
* generates a link to `/team/11/user/bob;details=true`.
*
* Multiple static segments can be merged into one term and combined with dynamic segements.
* For example, `['/team/11/user', userName, {details: true}]`
*
* The input that you provide to the link is treated as a delta to the current URL.
* For instance, suppose the current URL is `/user/(box//aux:team)`.
* The link `<a [routerLink]="['/user/jim']">Jim</a>` creates the URL
* `/user/(jim//aux:team)`.
* See {@link Router#createUrlTree createUrlTree} for more information.
*
* @usageNotes
*
* You can use absolute or relative paths in a link, set query parameters,
* control how parameters are handled, and keep a history of navigation states.
*
* ### Relative link paths
*
* The first segment name can be prepended with `/`, `./`, or `../`.
* * If the first segment begins with `/`, the router looks up the route from the root of the
* app.
* * If the first segment begins with `./`, or doesn't begin with a slash, the router
* looks in the children of the current activated route.
* * If the first segment begins with `../`, the router goes up one level in the route tree.
*
* ### Setting and handling query params and fragments
*
* The following link adds a query parameter and a fragment to the generated URL:
*
* ```
* <a [routerLink]="['/user/bob']" [queryParams]="{debug: true}" fragment="education">
* link to user component
* </a>
* ```
* By default, the directive constructs the new URL using the given query parameters.
* The example generates the link: `/user/bob?debug=true#education`.
*
* You can instruct the directive to handle query parameters differently
* by specifying the `queryParamsHandling` option in the link.
* Allowed values are:
*
* - `'merge'`: Merge the given `queryParams` into the current query params.
* - `'preserve'`: Preserve the current query params.
*
* For example:
*
* ```
* <a [routerLink]="['/user/bob']" [queryParams]="{debug: true}" queryParamsHandling="merge">
* link to user component
* </a>
* ```
*
* See {@link UrlCreationOptions.queryParamsHandling UrlCreationOptions#queryParamsHandling}.
*
* ### Preserving navigation history
*
* You can provide a `state` value to be persisted to the browser's
* [`History.state` property](https://developer.mozilla.org/en-US/docs/Web/API/History#Properties).
* For example:
*
* ```
* <a [routerLink]="['/user/bob']" [state]="{tracingId: 123}">
* link to user component
* </a>
* ```
*
* Use {@link Router.getCurrentNavigation() Router#getCurrentNavigation} to retrieve a saved
* navigation-state value. For example, to capture the `tracingId` during the `NavigationStart`
* event:
*
* ```
* // Get NavigationStart events
* router.events.pipe(filter(e => e instanceof NavigationStart)).subscribe(e => {
* const navigation = router.getCurrentNavigation();
* tracingService.trace({id: navigation.extras.state.tracingId});
* });
* ```
*
* @ngModule RouterModule
*
* @publicApi
*/
export class RouterLink {
constructor(router, route, tabIndex, renderer, el) {
this.router = router;
this.route = route;
this.commands = [];
/** @internal */
this.onChanges = new Subject();
if (tabIndex == null) {
renderer.setAttribute(el.nativeElement, 'tabindex', '0');
}
}
/** @nodoc */
ngOnChanges(changes) {
// This is subscribed to by `RouterLinkActive` so that it knows to update when there are changes
// to the RouterLinks it's tracking.
this.onChanges.next(this);
}
/**
* Commands to pass to {@link Router#createUrlTree Router#createUrlTree}.
* - **array**: commands to pass to {@link Router#createUrlTree Router#createUrlTree}.
* - **string**: shorthand for array of commands with just the string, i.e. `['/route']`
* - **null|undefined**: shorthand for an empty array of commands, i.e. `[]`
* @see {@link Router#createUrlTree Router#createUrlTree}
*/
set routerLink(commands) {
if (commands != null) {
this.commands = Array.isArray(commands) ? commands : [commands];
}
else {
this.commands = [];
}
}
/** @nodoc */
onClick() {
const extras = {
skipLocationChange: attrBoolValue(this.skipLocationChange),
replaceUrl: attrBoolValue(this.replaceUrl),
state: this.state,
};
this.router.navigateByUrl(this.urlTree, extras);
return true;
}
get urlTree() {
return this.router.createUrlTree(this.commands, {
relativeTo: this.route,
queryParams: this.queryParams,
fragment: this.fragment,
queryParamsHandling: this.queryParamsHandling,
preserveFragment: attrBoolValue(this.preserveFragment),
});
}
}
RouterLink.decorators = [
{ type: Directive, args: [{ selector: ':not(a):not(area)[routerLink]' },] }
];
RouterLink.ctorParameters = () => [
{ type: Router },
{ type: ActivatedRoute },
{ type: String, decorators: [{ type: Attribute, args: ['tabindex',] }] },
{ type: Renderer2 },
{ type: ElementRef }
];
RouterLink.propDecorators = {
queryParams: [{ type: Input }],
fragment: [{ type: Input }],
queryParamsHandling: [{ type: Input }],
preserveFragment: [{ type: Input }],
skipLocationChange: [{ type: Input }],
replaceUrl: [{ type: Input }],
state: [{ type: Input }],
routerLink: [{ type: Input }],
onClick: [{ type: HostListener, args: ['click',] }]
};
/**
* @description
*
* Lets you link to specific routes in your app.
*
* See `RouterLink` for more information.
*
* @ngModule RouterModule
*
* @publicApi
*/
export class RouterLinkWithHref {
constructor(router, route, locationStrategy) {
this.router = router;
this.route = route;
this.locationStrategy = locationStrategy;
this.commands = [];
/** @internal */
this.onChanges = new Subject();
this.subscription = router.events.subscribe((s) => {
if (s instanceof NavigationEnd) {
this.updateTargetUrlAndHref();
}
});
}
/**
* Commands to pass to {@link Router#createUrlTree Router#createUrlTree}.
* - **array**: commands to pass to {@link Router#createUrlTree Router#createUrlTree}.
* - **string**: shorthand for array of commands with just the string, i.e. `['/route']`
* - **null|undefined**: shorthand for an empty array of commands, i.e. `[]`
* @see {@link Router#createUrlTree Router#createUrlTree}
*/
set routerLink(commands) {
if (commands != null) {
this.commands = Array.isArray(commands) ? commands : [commands];
}
else {
this.commands = [];
}
}
/** @nodoc */
ngOnChanges(changes) {
this.updateTargetUrlAndHref();
this.onChanges.next(this);
}
/** @nodoc */
ngOnDestroy() {
this.subscription.unsubscribe();
}
/** @nodoc */
onClick(button, ctrlKey, shiftKey, altKey, metaKey) {
if (button !== 0 || ctrlKey || shiftKey || altKey || metaKey) {
return true;
}
if (typeof this.target === 'string' && this.target != '_self') {
return true;
}
const extras = {
skipLocationChange: attrBoolValue(this.skipLocationChange),
replaceUrl: attrBoolValue(this.replaceUrl),
state: this.state
};
this.router.navigateByUrl(this.urlTree, extras);
return false;
}
updateTargetUrlAndHref() {
this.href = this.locationStrategy.prepareExternalUrl(this.router.serializeUrl(this.urlTree));
}
get urlTree() {
return this.router.createUrlTree(this.commands, {
relativeTo: this.route,
queryParams: this.queryParams,
fragment: this.fragment,
queryParamsHandling: this.queryParamsHandling,
preserveFragment: attrBoolValue(this.preserveFragment),
});
}
}
RouterLinkWithHref.decorators = [
{ type: Directive, args: [{ selector: 'a[routerLink],area[routerLink]' },] }
];
RouterLinkWithHref.ctorParameters = () => [
{ type: Router },
{ type: ActivatedRoute },
{ type: LocationStrategy }
];
RouterLinkWithHref.propDecorators = {
target: [{ type: HostBinding, args: ['attr.target',] }, { type: Input }],
queryParams: [{ type: Input }],
fragment: [{ type: Input }],
queryParamsHandling: [{ type: Input }],
preserveFragment: [{ type: Input }],
skipLocationChange: [{ type: Input }],
replaceUrl: [{ type: Input }],
state: [{ type: Input }],
href: [{ type: HostBinding }],
routerLink: [{ type: Input }],
onClick: [{ type: HostListener, args: ['click',
['$event.button', '$event.ctrlKey', '$event.shiftKey', '$event.altKey', '$event.metaKey'],] }]
};
function attrBoolValue(s) {
return s === '' || !!s;
}
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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.io/license\n */\n\nimport {LocationStrategy} from '@angular/common';\nimport {Attribute, Directive, ElementRef, HostBinding, HostListener, Input, OnChanges, OnDestroy, Renderer2, SimpleChanges} from '@angular/core';\nimport {Subject, Subscription} from 'rxjs';\n\nimport {QueryParamsHandling} from '../config';\nimport {Event, NavigationEnd} from '../events';\nimport {Router} from '../router';\nimport {ActivatedRoute} from '../router_state';\nimport {Params} from '../shared';\nimport {UrlTree} from '../url_tree';\n\n\n/**\n * @description\n *\n * When applied to an element in a template, makes that element a link\n * that initiates navigation to a route. Navigation opens one or more routed components\n * in one or more `<router-outlet>` locations on the page.\n *\n * Given a route configuration `[{ path: 'user/:name', component: UserCmp }]`,\n * the following creates a static link to the route:\n * `<a routerLink=\"/user/bob\">link to user component</a>`\n *\n * You can use dynamic values to generate the link.\n * For a dynamic link, pass an array of path segments,\n * followed by the params for each segment.\n * For example, `['/team', teamId, 'user', userName, {details: true}]`\n * generates a link to `/team/11/user/bob;details=true`.\n *\n * Multiple static segments can be merged into one term and combined with dynamic segements.\n * For example, `['/team/11/user', userName, {details: true}]`\n *\n * The input that you provide to the link is treated as a delta to the current URL.\n * For instance, suppose the current URL is `/user/(box//aux:team)`.\n * The link `<a [routerLink]=\"['/user/jim']\">Jim</a>` creates the URL\n * `/user/(jim//aux:team)`.\n * See {@link Router#createUrlTree createUrlTree} for more information.\n *\n * @usageNotes\n *\n * You can use absolute or relative paths in a link, set query parameters,\n * control how parameters are handled, and keep a history of navigation states.\n *\n * ### Relative link paths\n *\n * The first segment name can be prepended with `/`, `./`, or `../`.\n * * If the first segment begins with `/`, the router looks up the route from the root of the\n *   app.\n * * If the first segment begins with `./`, or doesn't begin with a slash, the router\n *   looks in the children of the current activated route.\n * * If the first segment begins with `../`, the router goes up one level in the route tree.\n *\n * ### Setting and handling query params and fragments\n *\n * The following link adds a query parameter and a fragment to the generated URL:\n *\n * ```\n * <a [routerLink]=\"['/user/bob']\" [queryParams]=\"{debug: true}\" fragment=\"education\">\n *   link to user component\n * </a>\n * ```\n * By default, the directive constructs the new URL using the given query parameters.\n * The example generates the link: `/user/bob?debug=true#education`.\n *\n * You can instruct the directive to handle query parameters differently\n * by specifying the `queryParamsHandling` option in the link.\n * Allowed values are:\n *\n *  - `'merge'`: Merge the given `queryParams` into the current query params.\n *  - `'preserve'`: Preserve the current query params.\n *\n * For example:\n *\n * ```\n * <a [routerLink]=\"['/user/bob']\" [queryParams]=\"{debug: true}\" queryParamsHandling=\"merge\">\n *   link to user component\n * </a>\n * ```\n *\n * See {@link UrlCreationOptions.queryParamsHandling UrlCreationOptions#queryParamsHandling}.\n *\n * ### Preserving navigation history\n *\n * You can provide a `state` value to be persisted to the browser's\n * [`History.state` property](https://developer.mozilla.org/en-US/docs/Web/API/History#Properties).\n * For example:\n *\n * ```\n * <a [routerLink]=\"['/user/bob']\" [state]=\"{tracingId: 123}\">\n *   link to user component\n * </a>\n * ```\n *\n * Use {@link Router.getCurrentNavigation() Router#getCurrentNavigation} to retrieve a saved\n * navigation-state value. For example, to capture the `tracingId` during the `NavigationStart`\n * event:\n *\n * ```\n * // Get NavigationStart events\n * router.events.pipe(filter(e => e instanceof NavigationStart)).subscribe(e => {\n *   const navigation = router.getCurrentNavigation();\n *   tracingService.trace({id: navigation.extras.state.tracingId});\n * });\n * ```\n *\n * @ngModule RouterModule\n *\n * @publicApi\n */\n@Directive({selector: ':not(a):not(area)[routerLink]'})\nexport class RouterLink implements OnChanges {\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the\n   * `UrlCreationOptions`.\n   * @see {@link UrlCreationOptions#queryParams UrlCreationOptions#queryParams}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input() queryParams?: Params|null;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the\n   * `UrlCreationOptions`.\n   * @see {@link UrlCreationOptions#fragment UrlCreationOptions#fragment}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input() fragment?: string;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the\n   * `UrlCreationOptions`.\n   * @see {@link UrlCreationOptions#queryParamsHandling UrlCreationOptions#queryParamsHandling}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input() queryParamsHandling?: QueryParamsHandling|null;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the\n   * `UrlCreationOptions`.\n   * @see {@link UrlCreationOptions#preserveFragment UrlCreationOptions#preserveFragment}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() preserveFragment!: boolean;\n  /**\n   * Passed to {@link Router#navigateByUrl Router#navigateByUrl} as part of the\n   * `NavigationBehaviorOptions`.\n   * @see {@link NavigationBehaviorOptions#skipLocationChange NavigationBehaviorOptions#skipLocationChange}\n   * @see {@link Router#navigateByUrl Router#navigateByUrl}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() skipLocationChange!: boolean;\n  /**\n   * Passed to {@link Router#navigateByUrl Router#navigateByUrl} as part of the\n   * `NavigationBehaviorOptions`.\n   * @see {@link NavigationBehaviorOptions#replaceUrl NavigationBehaviorOptions#replaceUrl}\n   * @see {@link Router#navigateByUrl Router#navigateByUrl}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() replaceUrl!: boolean;\n  /**\n   * Passed to {@link Router#navigateByUrl Router#navigateByUrl} as part of the\n   * `NavigationBehaviorOptions`.\n   * @see {@link NavigationBehaviorOptions#state NavigationBehaviorOptions#state}\n   * @see {@link Router#navigateByUrl Router#navigateByUrl}\n   */\n  @Input() state?: {[k: string]: any};\n  private commands: any[] = [];\n  private preserve!: boolean;\n\n  /** @internal */\n  onChanges = new Subject<RouterLink>();\n\n  constructor(\n      private router: Router, private route: ActivatedRoute,\n      @Attribute('tabindex') tabIndex: string, renderer: Renderer2, el: ElementRef) {\n    if (tabIndex == null) {\n      renderer.setAttribute(el.nativeElement, 'tabindex', '0');\n    }\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges) {\n    // This is subscribed to by `RouterLinkActive` so that it knows to update when there are changes\n    // to the RouterLinks it's tracking.\n    this.onChanges.next(this);\n  }\n\n  /**\n   * Commands to pass to {@link Router#createUrlTree Router#createUrlTree}.\n   *   - **array**: commands to pass to {@link Router#createUrlTree Router#createUrlTree}.\n   *   - **string**: shorthand for array of commands with just the string, i.e. `['/route']`\n   *   - **null|undefined**: shorthand for an empty array of commands, i.e. `[]`\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input()\n  set routerLink(commands: any[]|string|null|undefined) {\n    if (commands != null) {\n      this.commands = Array.isArray(commands) ? commands : [commands];\n    } else {\n      this.commands = [];\n    }\n  }\n\n  /** @nodoc */\n  @HostListener('click')\n  onClick(): boolean {\n    const extras = {\n      skipLocationChange: attrBoolValue(this.skipLocationChange),\n      replaceUrl: attrBoolValue(this.replaceUrl),\n      state: this.state,\n    };\n    this.router.navigateByUrl(this.urlTree, extras);\n    return true;\n  }\n\n  get urlTree(): UrlTree {\n    return this.router.createUrlTree(this.commands, {\n      relativeTo: this.route,\n      queryParams: this.queryParams,\n      fragment: this.fragment,\n      queryParamsHandling: this.queryParamsHandling,\n      preserveFragment: attrBoolValue(this.preserveFragment),\n    });\n  }\n}\n\n/**\n * @description\n *\n * Lets you link to specific routes in your app.\n *\n * See `RouterLink` for more information.\n *\n * @ngModule RouterModule\n *\n * @publicApi\n */\n@Directive({selector: 'a[routerLink],area[routerLink]'})\nexport class RouterLinkWithHref implements OnChanges, OnDestroy {\n  // TODO(issue/24571): remove '!'.\n  @HostBinding('attr.target') @Input() target!: string;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the\n   * `UrlCreationOptions`.\n   * @see {@link UrlCreationOptions#queryParams UrlCreationOptions#queryParams}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input() queryParams?: Params|null;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the\n   * `UrlCreationOptions`.\n   * @see {@link UrlCreationOptions#fragment UrlCreationOptions#fragment}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input() fragment?: string;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the\n   * `UrlCreationOptions`.\n   * @see {@link UrlCreationOptions#queryParamsHandling UrlCreationOptions#queryParamsHandling}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input() queryParamsHandling?: QueryParamsHandling|null;\n  /**\n   * Passed to {@link Router#createUrlTree Router#createUrlTree} as part of the\n   * `UrlCreationOptions`.\n   * @see {@link UrlCreationOptions#preserveFragment UrlCreationOptions#preserveFragment}\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() preserveFragment!: boolean;\n  /**\n   * Passed to {@link Router#navigateByUrl Router#navigateByUrl} as part of the\n   * `NavigationBehaviorOptions`.\n   * @see {@link NavigationBehaviorOptions#skipLocationChange NavigationBehaviorOptions#skipLocationChange}\n   * @see {@link Router#navigateByUrl Router#navigateByUrl}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() skipLocationChange!: boolean;\n  /**\n   * Passed to {@link Router#navigateByUrl Router#navigateByUrl} as part of the\n   * `NavigationBehaviorOptions`.\n   * @see {@link NavigationBehaviorOptions#replaceUrl NavigationBehaviorOptions#replaceUrl}\n   * @see {@link Router#navigateByUrl Router#navigateByUrl}\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input() replaceUrl!: boolean;\n  /**\n   * Passed to {@link Router#navigateByUrl Router#navigateByUrl} as part of the\n   * `NavigationBehaviorOptions`.\n   * @see {@link NavigationBehaviorOptions#state NavigationBehaviorOptions#state}\n   * @see {@link Router#navigateByUrl Router#navigateByUrl}\n   */\n  @Input() state?: {[k: string]: any};\n  private commands: any[] = [];\n  private subscription: Subscription;\n  // TODO(issue/24571): remove '!'.\n  private preserve!: boolean;\n\n  // the url displayed on the anchor element.\n  // TODO(issue/24571): remove '!'.\n  @HostBinding() href!: string;\n\n  /** @internal */\n  onChanges = new Subject<RouterLinkWithHref>();\n\n  constructor(\n      private router: Router, private route: ActivatedRoute,\n      private locationStrategy: LocationStrategy) {\n    this.subscription = router.events.subscribe((s: Event) => {\n      if (s instanceof NavigationEnd) {\n        this.updateTargetUrlAndHref();\n      }\n    });\n  }\n\n  /**\n   * Commands to pass to {@link Router#createUrlTree Router#createUrlTree}.\n   *   - **array**: commands to pass to {@link Router#createUrlTree Router#createUrlTree}.\n   *   - **string**: shorthand for array of commands with just the string, i.e. `['/route']`\n   *   - **null|undefined**: shorthand for an empty array of commands, i.e. `[]`\n   * @see {@link Router#createUrlTree Router#createUrlTree}\n   */\n  @Input()\n  set routerLink(commands: any[]|string|null|undefined) {\n    if (commands != null) {\n      this.commands = Array.isArray(commands) ? commands : [commands];\n    } else {\n      this.commands = [];\n    }\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges): any {\n    this.updateTargetUrlAndHref();\n    this.onChanges.next(this);\n  }\n  /** @nodoc */\n  ngOnDestroy(): any {\n    this.subscription.unsubscribe();\n  }\n\n  /** @nodoc */\n  @HostListener(\n      'click',\n      ['$event.button', '$event.ctrlKey', '$event.shiftKey', '$event.altKey', '$event.metaKey'])\n  onClick(button: number, ctrlKey: boolean, shiftKey: boolean, altKey: boolean, metaKey: boolean):\n      boolean {\n    if (button !== 0 || ctrlKey || shiftKey || altKey || metaKey) {\n      return true;\n    }\n\n    if (typeof this.target === 'string' && this.target != '_self') {\n      return true;\n    }\n\n    const extras = {\n      skipLocationChange: attrBoolValue(this.skipLocationChange),\n      replaceUrl: attrBoolValue(this.replaceUrl),\n      state: this.state\n    };\n    this.router.navigateByUrl(this.urlTree, extras);\n    return false;\n  }\n\n  private updateTargetUrlAndHref(): void {\n    this.href = this.locationStrategy.prepareExternalUrl(this.router.serializeUrl(this.urlTree));\n  }\n\n  get urlTree(): UrlTree {\n    return this.router.createUrlTree(this.commands, {\n      relativeTo: this.route,\n      queryParams: this.queryParams,\n      fragment: this.fragment,\n      queryParamsHandling: this.queryParamsHandling,\n      preserveFragment: attrBoolValue(this.preserveFragment),\n    });\n  }\n}\n\nfunction attrBoolValue(s: any): boolean {\n  return s === '' || !!s;\n}\n"]}