@ng-web-apis/intersection-observer/fesm2022/ng-web-apis-intersection-observer.mjs.map

A library for declarative use of Intersection Observer API with Angular

{"version":3,"file":"ng-web-apis-intersection-observer.mjs","sources":["../../../libs/intersection-observer/src/classes/safe-observer.ts","../../../libs/intersection-observer/src/tokens/intersection-root.ts","../../../libs/intersection-observer/src/tokens/intersection-root-margin.ts","../../../libs/intersection-observer/src/utils/root-margin-factory.ts","../../../libs/intersection-observer/src/tokens/intersection-threshold.ts","../../../libs/intersection-observer/src/utils/threshold-factory.ts","../../../libs/intersection-observer/src/directives/intersection-observer.directive.ts","../../../libs/intersection-observer/src/services/intersection-observee.service.ts","../../../libs/intersection-observer/src/directives/intersection-observee.directive.ts","../../../libs/intersection-observer/src/directives/intersection-root.directive.ts","../../../libs/intersection-observer/src/intersection-observer.ts","../../../libs/intersection-observer/src/services/intersection-observer.service.ts","../../../libs/intersection-observer/src/tokens/support.ts","../../../libs/intersection-observer/src/ng-web-apis-intersection-observer.ts"],"sourcesContent":["export const SafeObserver =\n    typeof IntersectionObserver === 'undefined'\n        ? class implements IntersectionObserver {\n              public readonly root = null;\n              public readonly rootMargin = '';\n              public readonly thresholds = [];\n              public observe(): void {}\n              public unobserve(): void {}\n              public disconnect(): void {}\n              public takeRecords(): IntersectionObserverEntry[] {\n                  return [];\n              }\n          }\n        : IntersectionObserver;\n","import {type ElementRef, InjectionToken} from '@angular/core';\n\nexport const WA_INTERSECTION_ROOT = new InjectionToken<ElementRef<Element>>(\n    ngDevMode ? '[WA_INTERSECTION_ROOT]' : '',\n);\n","import {InjectionToken} from '@angular/core';\n\nexport const WA_INTERSECTION_ROOT_MARGIN_DEFAULT = '0px 0px 0px 0px';\n\nexport const WA_INTERSECTION_ROOT_MARGIN = new InjectionToken<string>(\n    ngDevMode ? '[WA_INTERSECTION_ROOT_MARGIN]' : '',\n    {factory: () => WA_INTERSECTION_ROOT_MARGIN_DEFAULT},\n);\n","import {ElementRef, inject} from '@angular/core';\n\nimport {WA_INTERSECTION_ROOT_MARGIN_DEFAULT} from '../tokens/intersection-root-margin';\n\nexport function rootMarginFactory(): string {\n    return (\n        inject(ElementRef).nativeElement.getAttribute('waIntersectionRootMargin') ||\n        WA_INTERSECTION_ROOT_MARGIN_DEFAULT\n    );\n}\n","import {InjectionToken} from '@angular/core';\n\nexport const WA_INTERSECTION_THRESHOLD_DEFAULT = 0;\n\nexport const WA_INTERSECTION_THRESHOLD = new InjectionToken<number[] | number>(\n    ngDevMode ? '[WA_INTERSECTION_THRESHOLD]' : '',\n    {factory: () => WA_INTERSECTION_THRESHOLD_DEFAULT},\n);\n","import {ElementRef, inject} from '@angular/core';\n\nimport {WA_INTERSECTION_THRESHOLD_DEFAULT} from '../tokens/intersection-threshold';\n\nexport function thresholdFactory(): number[] | number {\n    return (\n        inject(ElementRef)\n            .nativeElement.getAttribute('waIntersectionThreshold')\n            ?.split(',')\n            .map(Number.parseFloat) || WA_INTERSECTION_THRESHOLD_DEFAULT\n    );\n}\n","import {Directive, inject, type OnDestroy} from '@angular/core';\n\nimport {SafeObserver} from '../classes/safe-observer';\nimport {WA_INTERSECTION_ROOT} from '../tokens/intersection-root';\nimport {rootMarginFactory} from '../utils/root-margin-factory';\nimport {thresholdFactory} from '../utils/threshold-factory';\n\n@Directive({\n    selector: '[waIntersectionObserver]',\n    inputs: ['margin: waIntersectionRootMargin', 'threshold: waIntersectionThreshold'],\n    exportAs: 'IntersectionObserver',\n})\nexport class WaIntersectionObserverDirective extends SafeObserver implements OnDestroy {\n    private readonly callbacks = new Map<Element, IntersectionObserverCallback>();\n    public margin = '';\n    public threshold = '';\n\n    constructor() {\n        const root = inject(WA_INTERSECTION_ROOT, {optional: true});\n\n        super(\n            (entries) => {\n                this.callbacks.forEach((callback, element) => {\n                    const filtered = entries.filter(({target}) => target === element);\n\n                    if (filtered.length) {\n                        callback(filtered, this);\n                    }\n                });\n            },\n            {\n                root: root?.nativeElement,\n                rootMargin: rootMarginFactory(),\n                threshold: thresholdFactory(),\n            },\n        );\n    }\n\n    public override observe(\n        target: Element,\n        callback: IntersectionObserverCallback = () => {},\n    ): void {\n        super.observe(target);\n        this.callbacks.set(target, callback);\n    }\n\n    public override unobserve(target: Element): void {\n        super.unobserve(target);\n        this.callbacks.delete(target);\n    }\n\n    public ngOnDestroy(): void {\n        this.disconnect();\n    }\n}\n","import {ElementRef, inject, Injectable} from '@angular/core';\nimport {Observable, share} from 'rxjs';\n\nimport {WaIntersectionObserverDirective} from '../directives/intersection-observer.directive';\n\n@Injectable()\nexport class WaIntersectionObserveeService extends Observable<\n    IntersectionObserverEntry[]\n> {\n    constructor() {\n        const nativeElement: Element = inject(ElementRef).nativeElement;\n        const observer = inject(WaIntersectionObserverDirective);\n\n        super((subscriber) => {\n            observer.observe(nativeElement, (entries) => {\n                subscriber.next(entries);\n            });\n\n            return () => {\n                observer.unobserve(nativeElement);\n            };\n        });\n\n        return this.pipe(share());\n    }\n}\n","import {Directive, inject} from '@angular/core';\nimport {outputFromObservable} from '@angular/core/rxjs-interop';\n\nimport {WaIntersectionObserveeService} from '../services/intersection-observee.service';\n\n@Directive({\n    selector: '[waIntersectionObservee]',\n    providers: [WaIntersectionObserveeService],\n})\nexport class WaIntersectionObservee {\n    public readonly waIntersectionObservee = outputFromObservable(\n        inject(WaIntersectionObserveeService),\n    );\n}\n","import {Directive, ElementRef} from '@angular/core';\n\nimport {WA_INTERSECTION_ROOT} from '../tokens/intersection-root';\n\n@Directive({\n    selector: '[waIntersectionRoot]',\n    providers: [{provide: WA_INTERSECTION_ROOT, useExisting: ElementRef}],\n})\nexport class WaIntersectionRoot {}\n","import {WaIntersectionObservee} from './directives/intersection-observee.directive';\nimport {WaIntersectionObserverDirective} from './directives/intersection-observer.directive';\nimport {WaIntersectionRoot} from './directives/intersection-root.directive';\n\nexport const WaIntersectionObserver = [\n    WaIntersectionObserverDirective,\n    WaIntersectionObservee,\n    WaIntersectionRoot,\n] as const;\n","import {ElementRef, inject, Injectable} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {SafeObserver} from '../classes/safe-observer';\nimport {WA_INTERSECTION_ROOT} from '../tokens/intersection-root';\nimport {WA_INTERSECTION_ROOT_MARGIN} from '../tokens/intersection-root-margin';\nimport {WA_INTERSECTION_THRESHOLD} from '../tokens/intersection-threshold';\n\n@Injectable()\nexport class WaIntersectionObserverService extends Observable<\n    IntersectionObserverEntry[]\n> {\n    private readonly nativeElement: Element = inject(ElementRef).nativeElement;\n    private readonly rootMargin = inject(WA_INTERSECTION_ROOT_MARGIN);\n    private readonly threshold = inject(WA_INTERSECTION_THRESHOLD);\n\n    private readonly root =\n        inject(WA_INTERSECTION_ROOT, {optional: true})?.nativeElement ?? null;\n\n    constructor() {\n        super((subscriber) => {\n            const observer = new SafeObserver(\n                (entries) => {\n                    subscriber.next(entries);\n                },\n                {\n                    root: this.root,\n                    rootMargin: this.rootMargin,\n                    threshold: this.threshold,\n                },\n            );\n\n            observer.observe(this.nativeElement);\n\n            return () => {\n                observer.disconnect();\n            };\n        });\n    }\n}\n","import {inject, InjectionToken} from '@angular/core';\nimport {WA_WINDOW} from '@ng-web-apis/common';\n\nexport const WA_INTERSECTION_OBSERVER_SUPPORT = new InjectionToken<boolean>(\n    ngDevMode ? '[WA_INTERSECTION_OBSERVER_SUPPORT]' : '',\n    {factory: () => !!(inject(WA_WINDOW) as any).IntersectionObserver},\n);\n","/**\n * Generated bundle index. 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