Merge branch 'release/4.5' into develop

azure-pipelines.yml

@@ -12,7 +12,7 @@ variables:
     value: '4'
   # Minor Version einstellen
   - name: 'Minor'
-    value: '4'
+    value: '5'
   - name: 'Patch'
     value: "$[counter(format('{0}.{1}', variables['Major'], variables['Minor']),0)]"
   - name: 'BuildUniqueID'

docs/library-reference.md

@@ -345,7 +345,7 @@ A collection of reusable row components for displaying structured data with cons
 **Location:** `libs/ui/item-rows/`
 
 ### `@isa/ui/layout`
-This library provides utilities and directives for responsive design in Angular applications.
+This library provides utilities and directives for responsive design and viewport behavior in Angular applications.
 
 **Location:** `libs/ui/layout/`
 
@@ -432,4 +432,4 @@ This file should be updated when:
 - Library purposes significantly change
 - Angular or Nx versions are upgraded
 
-**Automation:** This file is auto-generated using `npm run docs:generate`. Run this command after adding or modifying libraries to keep the documentation up-to-date.
+**Automation:** This file is auto-generated using `npm run docs:generate`. Run this command after adding or modifying libraries to keep the documentation up-to-date.

libs/crm/data-access/src/lib/models/bonus-card-info.model.ts

@@ -1,9 +1,10 @@
-import { BonusCardInfoDTO } from '@generated/swagger/crm-api';
+import { BonusCardInfoDTO } from '@generated/swagger/crm-api';
-
+
-export interface BonusCardInfo extends BonusCardInfoDTO {
+export interface BonusCardInfo extends BonusCardInfoDTO {
-  firstName: string;
+  firstName: string;
-  lastName: string;
+  lastName: string;
-  isActive: boolean;
+  isActive: boolean;
-  isPrimary: boolean;
+  isPrimary: boolean;
-  totalPoints: number;
+  totalPoints: number;
-}
+  code: string;
+}

libs/crm/data-access/src/lib/resources/customer-bonus-cards.resource.ts

@@ -4,27 +4,39 @@ import { CrmSearchService } from '../services/crm-search.service';
 import { BonusCardInfo } from '../models';
 
 /**
- * Resource for loading customer bonus cards (Kundenkarten).
+ * Resource for loading customer bonus cards (Kundenkarten) using Angular's Resource API.
  *
- * Provides reactive loading of all bonus cards for a given customer ID.
+ * Provides reactive, automatic loading of all bonus cards for a given customer ID.
- * Customer ID can be changed dynamically via `params()` method.
+ * Uses Angular's `resource()` function for declarative data fetching with built-in
+ * loading states, error handling, and automatic race condition prevention.
  *
- * **Note:** This resource should be provided at the component level,
+ * **Features:**
- * not in root. Provide it in the `providers` array of the component
+ * - Reactive loading triggered by parameter changes
- * that needs scoped access to customer bonus cards.
+ * - Automatic request cancellation on parameter updates (race condition prevention)
+ * - Built-in loading, error, and status states
+ * - Customer ID can be changed dynamically via `params()` method
+ * - Lazy loading: only fetches when customerId is provided
+ *
+ * **Lifecycle:**
+ * - **Injectable:** Component-level only (not providedIn: 'root')
+ * - **Scope:** Provide in component `providers` array for isolated state
+ * - **Data Flow:** params → loader → resource.value → UI
  *
  * @example
  * ```typescript
  * @Component({
  *   providers: [CustomerBonusCardsResource],
  * })
- * export class MyFeatureComponent {
+ * export class CustomerCardsComponent {
- *   #bonusCardsResource = inject(CustomerBonusCardsResource);
+ *   readonly #bonusCardsResource = inject(CustomerBonusCardsResource);
  *
- *   cards = this.#bonusCardsResource.resource.value;
+ *   // Reactive signals exposed by resource
- *   isLoading = this.#bonusCardsResource.resource.isLoading;
+ *   readonly cards = this.#bonusCardsResource.resource.value;
+ *   readonly isLoading = this.#bonusCardsResource.resource.isLoading;
+ *   readonly error = this.#bonusCardsResource.resource.error;
  *
- *   loadCards(customerId: number) {
+ *   // Trigger load by updating params
+ *   loadCards(customerId: number): void {
  *     this.#bonusCardsResource.params({ customerId });
  *   }
  * }
@@ -39,17 +51,40 @@ export class CustomerBonusCardsResource {
 
   /**
    * Current customer ID being loaded.
+   *
+   * Read-only computed signal that exposes the current customer ID parameter.
+   * Returns `undefined` if no customer ID has been set via `params()`.
+   *
+   * @returns Customer ID or undefined if not set
    */
   readonly customerId = computed(() => this.#customerId());
 
   /**
-   * Resource that loads bonus cards based on current parameters.
+   * Angular Resource API instance that manages bonus card loading.
    *
-   * Exposes:
+   * Automatically loads bonus cards when `customerId` parameter changes.
-   * - `value()` - Array of bonus cards or undefined
+   * Provides reactive signals for data, loading state, errors, and status.
-   * - `isLoading()` - Loading state
+   *
-   * - `error()` - Error state
+   * **Exposed Signals:**
-   * - `status()` - Current status ('idle' | 'loading' | 'resolved' | 'error')
+   * - `value()` - Array of bonus cards or undefined (when no data loaded)
+   * - `isLoading()` - Boolean indicating if a request is in progress
+   * - `error()` - Error object if load failed, undefined otherwise
+   * - `status()` - Current lifecycle status: 'idle' | 'loading' | 'resolved' | 'error'
+   *
+   * **Behavior:**
+   * - Lazy: Only loads when customerId is provided (not undefined)
+   * - Reactive: Automatically reloads when params change
+   * - Safe: Cancels previous requests to prevent race conditions
+   * - Cacheable: Returns undefined as default value before first load
+   *
+   * @example
+   * ```typescript
+   * // Access reactive signals
+   * const cards = this.resource.value();       // BonusCardInfo[] | undefined
+   * const loading = this.resource.isLoading(); // boolean
+   * const error = this.resource.error();       // Error | undefined
+   * const status = this.resource.status();     // ResourceStatus
+   * ```
    */
   readonly resource = resource({
     params: computed(() => ({ customerId: this.#customerId() })),
@@ -81,14 +116,85 @@ export class CustomerBonusCardsResource {
     defaultValue: undefined,
   });
 
+  constructor() {
+    (window as any)['__customerBonusCardsResource'] = this;
+  }
+
   /**
-   * Update resource parameters to trigger a reload.
+   * Updates resource parameters to trigger a reactive reload of bonus cards.
+   *
+   * Setting a new `customerId` will automatically cancel any in-flight request
+   * and start a new load with the updated parameter. The resource's loader
+   * function will be called with the new parameters.
+   *
+   * **Behavior:**
+   * - Passing `customerId` triggers a load for that customer
+   * - Passing `undefined` clears the data and returns resource to idle state
+   * - Automatically cancels previous requests (race condition prevention)
+   * - Updates are reactive: UI updates automatically via resource signals
    *
    * @param params - Parameters for loading bonus cards
-   * @param params.customerId - Customer ID to load cards for (undefined clears data)
+   * @param params.customerId - Customer ID to load cards for, or undefined to clear
+   *
+   * @example
+   * ```typescript
+   * // Load cards for customer 12345
+   * bonusCardsResource.params({ customerId: 12345 });
+   *
+   * // Clear data and reset to idle
+   * bonusCardsResource.params({ customerId: undefined });
+   * ```
    */
   params(params: { customerId?: number }): void {
     this.#logger.debug('Updating params', () => params);
     this.#customerId.set(params.customerId);
   }
+
+  /**
+   * Adds a random test card to the current card list.
+   *
+   * **For testing purposes only.** Creates a new card with random code
+   * and copies customer details from the first existing card.
+   *
+   * **Testing the Card Stack Display:**
+   * This method is useful for testing the card carousel stack behavior,
+   * particularly verifying that newly added cards appear correctly in the stack
+   * rather than mispositioned on the right side.
+   *
+   * **How to Test:**
+   * 1. Open browser DevTools console (F12)
+   * 2. Navigate to a customer with bonus cards
+   * 3. Execute: `window.__customerBonusCardsResource.addRandomCardForTesting()`
+   * 4. Verify the new card appears properly in the stack (not on the right)
+   * 5. Repeat to test with multiple new cards
+   *
+   * **Expected Behavior:**
+   * - New card should appear in correct stack position based on isPrimary/isActive
+   * - Card should animate smoothly into position
+   * - Stack should recalculate positions using ResizeObserver
+   * - No visual glitches or misalignment
+   *
+   * @example
+   * ```typescript
+   * // From browser console (development only):
+   * window.__customerBonusCardsResource.addRandomCardForTesting();
+   *
+   * // From component code:
+   * this.#bonusCardsResource.addRandomCardForTesting();
+   * ```
+   */
+  addRandomCardForTesting(): void {
+    const currentCards = this.resource.value() ?? [];
+    const newCard: BonusCardInfo = {
+      code: `TEST-${Math.floor(Math.random() * 100000)}`,
+      format: 'CARDCODE',
+      isActive: true,
+      isPrimary: false,
+      totalPoints: currentCards[0].totalPoints,
+      firstName: currentCards[0].firstName,
+      lastName: currentCards[0].lastName,
+    };
+    this.#logger.debug('Adding random test card', () => ({ newCard }));
+    this.resource.set([...currentCards, newCard]);
+  }
 }

libs/crm/feature/customer-loyalty-cards/src/lib/components/customer-card/customer-card.component.css

@@ -1,4 +1,4 @@
 /* Customer card styles - using Tailwind, no additional CSS needed */
 :host {
-  @apply rounded-2xl overflow-hidden;
+  @apply rounded-2xl overflow-hidden bg-white;
 }

libs/crm/feature/customer-loyalty-cards/src/lib/components/customer-cards-carousel/card-stack-container.directive.ts

@@ -1,6 +1,7 @@
 import {
   AfterViewInit,
   Directive,
+  effect,
   ElementRef,
   inject,
   signal,
@@ -11,6 +12,25 @@ export class CardStackContainerDirective implements AfterViewInit {
   readonly elementRef = inject(ElementRef<HTMLElement>);
 
   readonly centerX = signal(0);
+  private resizeObserver?: ResizeObserver;
+
+  constructor() {
+    // Use ResizeObserver to detect layout changes (when cards added/removed)
+    effect((onCleanup) => {
+      const el = this.elementRef.nativeElement;
+
+      this.resizeObserver = new ResizeObserver(() => {
+        // Recalculate center when container size changes
+        this.centerX.set(this.getHorizontalCenter());
+      });
+
+      this.resizeObserver.observe(el);
+
+      onCleanup(() => {
+        this.resizeObserver?.disconnect();
+      });
+    });
+  }
 
   ngAfterViewInit(): void {
     this.centerX.set(this.getHorizontalCenter());

libs/crm/feature/customer-loyalty-cards/src/lib/components/customer-cards-carousel/card-stack-distance.directive.ts

@@ -2,6 +2,7 @@ import {
   AfterViewInit,
   computed,
   Directive,
+  effect,
   ElementRef,
   inject,
   signal,
@@ -26,7 +27,24 @@ export class CardStackDistanceDirective implements AfterViewInit {
 
   centerX = signal(0);
 
+  constructor() {
+    // Recalculate position when container center changes
+    effect(() => {
+      // React to container center changes
+      const containerCenter = this.container.centerX();
+
+      // Recalculate this card's center position
+      if (containerCenter !== 0) {
+        // Use requestAnimationFrame to ensure DOM is stable
+        requestAnimationFrame(() => {
+          this.centerX.set(this.getHorizontalCenter());
+        });
+      }
+    });
+  }
+
   ngAfterViewInit(): void {
+    // Initial calculation
     this.centerX.set(this.getHorizontalCenter());
   }
 

libs/crm/feature/customer-loyalty-cards/src/lib/components/customer-cards-carousel/customer-cards-carousel.component.css

@@ -39,24 +39,29 @@ crm-customer-card {
   transform: translateX(var(--distance-to-center));
 }
 
-.stacked crm-customer-card:nth-child(1) {
+/* Use data attributes instead of nth-child for dynamic positioning */
+.stacked crm-customer-card[data-stack-position='0'] {
   z-index: 3;
 }
 
-.stacked crm-customer-card:nth-child(2) {
+.stacked crm-customer-card[data-stack-position='1'] {
   transform: translateX(calc(var(--distance-to-center) - 3.6rem))
     translateY(1rem) rotate(-2.538deg);
   z-index: 2;
 }
 
-.stacked crm-customer-card:nth-child(3) {
+.stacked crm-customer-card[data-stack-position='2'] {
   transform: translateX(calc(var(--distance-to-center) + 3.6rem))
     translateY(1rem) rotate(2.538deg);
   z-index: 1;
 }
 
-.stacked crm-customer-card:nth-child(n + 4) {
+/* Hide cards beyond the 3rd position */
+.stacked
+  crm-customer-card:not([data-stack-position='0']):not([data-stack-position='1']):not([data-stack-position='2']) {
   box-shadow: none;
+  opacity: 0;
+  pointer-events: none;
 }
 
 /* Respect user's motion preferences */

libs/crm/feature/customer-loyalty-cards/src/lib/components/customer-cards-carousel/customer-cards-carousel.component.html

@@ -13,6 +13,8 @@
         (cardLocked)="cardLocked.emit()"
         crmCardStackDistance
         [style.--card-index]="idx"
+        [style.--stack-position]="idx"
+        [attr.data-stack-position]="idx"
       />
     }
   </ui-carousel>

libs/crm/feature/customer-loyalty-cards/src/lib/components/customer-cards-carousel/customer-cards-carousel.component.ts

@@ -52,15 +52,24 @@ export class CustomerCardsCarouselComponent {
   readonly cardLocked = output<void>();
 
   /**
-   * Cards sorted with blocked cards at the end.
+   * Cards sorted by priority: isPrimary > isActive > code
    * Per Figma annotation: "gesperrte Karte immer nach hinten"
    */
   readonly sortedCards = computed(() => {
     const cards = this.cards();
     return [...cards].sort((a, b) => {
-      // Active cards first, blocked cards last
+      // 1. Primary cards first
-      if (a.isActive === b.isActive) return 0;
+      if (a.isPrimary !== b.isPrimary) {
-      return a.isActive ? -1 : 1;
+        return a.isPrimary ? -1 : 1;
+      }
+
+      // 2. Active cards before blocked cards
+      if (a.isActive !== b.isActive) {
+        return a.isActive ? -1 : 1;
+      }
+
+      // 3. Sort by code for stable ordering
+      return a.code.localeCompare(b.code);
     });
   });
 

libs/ui/input-controls/src/lib/dropdown/_dropdown.scss

@@ -73,11 +73,15 @@
   background: var(--Neutral-White, #fff);
   box-shadow: 0px 0px 16px 0px rgba(0, 0, 0, 0.15);
   width: 100%;
+  max-height: 20rem;
+  overflow: hidden;
+  overflow-y: auto;
 
   .ui-dropdown-option {
     display: flex;
     width: 10rem;
     height: 3rem;
+    min-height: 3rem;
     padding: 0rem 1.5rem;
     flex-direction: row;
     justify-content: space-between;

libs/ui/input-controls/src/lib/dropdown/dropdown.component.html

@@ -11,11 +11,11 @@
   cdkConnectedOverlayBackdropClass="cdk-overlay-transparent-backdrop"
   [cdkConnectedOverlayMinWidth]="overlayMinWidth"
   [cdkConnectedOverlayLockPosition]="true"
+  [cdkConnectedOverlayScrollStrategy]="blockScrollStrategy"
   (backdropClick)="close()"
   (detach)="isOpen.set(false)"
 >
-  <ul [class]="['ui-dropdown__options']" role="listbox">
+  <ul #optionsPanel [class]="['ui-dropdown__options']" role="listbox">
-    <!-- Fixed typo -->
     <ng-content></ng-content>
   </ul>
 </ng-template>

libs/ui/input-controls/src/lib/dropdown/dropdown.component.ts

@@ -11,16 +11,22 @@ import {
   input,
   model,
   signal,
+  viewChild,
 } from '@angular/core';
 
 import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
 import { NgIconComponent, provideIcons } from '@ng-icons/core';
 import { isaActionChevronUp, isaActionChevronDown } from '@isa/icons';
 import { ActiveDescendantKeyManager, Highlightable } from '@angular/cdk/a11y';
-import { CdkConnectedOverlay, CdkOverlayOrigin } from '@angular/cdk/overlay';
+import {
+  CdkConnectedOverlay,
+  CdkOverlayOrigin,
+  ScrollStrategyOptions,
+} from '@angular/cdk/overlay';
 import { isEqual } from 'lodash';
 import { DropdownAppearance } from './dropdown.types';
 import { DropdownService } from './dropdown.service';
+import { CloseOnScrollDirective } from '@isa/ui/layout';
 
 @Component({
   selector: 'ui-dropdown-option',
@@ -90,7 +96,13 @@ export class DropdownOptionComponent<T> implements Highlightable {
   selector: 'ui-dropdown',
   templateUrl: './dropdown.component.html',
   changeDetection: ChangeDetectionStrategy.OnPush,
-  hostDirectives: [CdkOverlayOrigin],
+  hostDirectives: [
+    CdkOverlayOrigin,
+    {
+      directive: CloseOnScrollDirective,
+      outputs: ['closeOnScroll'],
+    },
+  ],
   imports: [NgIconComponent, CdkConnectedOverlay],
   providers: [
     provideIcons({ isaActionChevronUp, isaActionChevronDown }),
@@ -113,20 +125,30 @@ export class DropdownOptionComponent<T> implements Highlightable {
     '(keydown.escape)': 'close()',
     '(click)':
       'disabled() ? $event.stopImmediatePropagation() : (isOpen() ? close() : open())',
+    '(closeOnScroll)': 'close()',
   },
 })
 export class DropdownButtonComponent<T>
   implements ControlValueAccessor, AfterViewInit
 {
   #dropdownService = inject(DropdownService);
+  #scrollStrategy = inject(ScrollStrategyOptions);
+  #closeOnScroll = inject(CloseOnScrollDirective, { self: true });
 
   readonly init = signal(false);
   private elementRef = inject(ElementRef);
 
+  /** Reference to the options panel for scroll exclusion */
+  optionsPanel = viewChild<ElementRef<HTMLElement>>('optionsPanel');
+
   get overlayMinWidth() {
     return this.elementRef.nativeElement.offsetWidth;
   }
 
+  get blockScrollStrategy() {
+    return this.#scrollStrategy.block();
+  }
+
   appearance = input<DropdownAppearance>(DropdownAppearance.AccentOutline);
 
   appearanceClass = computed(() => `ui-dropdown__${this.appearance()}`);
@@ -200,6 +222,14 @@ export class DropdownButtonComponent<T>
         .withWrap()
         .skipPredicate((option) => option.disabled);
     });
+
+    // Configure CloseOnScrollDirective: activate when open, exclude options panel
+    effect(() => {
+      this.#closeOnScroll.closeOnScrollWhen.set(this.isOpen());
+      this.#closeOnScroll.closeOnScrollExclude.set(
+        this.optionsPanel()?.nativeElement,
+      );
+    });
   }
 
   open() {

libs/ui/layout/README.md

@@ -1,11 +1,13 @@
 # ui-layout
 
-This library provides utilities and directives for responsive design in Angular applications.
+This library provides utilities and directives for responsive design and viewport behavior in Angular applications.
 
 ## Features
 
 - **Breakpoint Utility**: A function to detect viewport breakpoints using Angular's `BreakpointObserver`.
 - **Breakpoint Directive**: A structural directive to conditionally render templates based on viewport breakpoints.
+- **InViewport Directive**: Emits events when elements enter or leave the viewport.
+- **CloseOnScroll Directive**: Emits events when scrolling occurs outside a specified element (useful for closing overlays).
 
 ## Installation
 
@@ -41,6 +43,29 @@ Use this directive to emit an event whenever the host element enters or leaves t
 <some-element uiInViewport (uiInViewport)="onInViewportChange($event)"> ... </some-element>
 ```
 
+### CloseOnScroll Directive
+
+Use this directive to close overlays (dropdowns, popovers) when the user scrolls the page, while allowing scrolling within the overlay itself.
+
+```typescript
+// As hostDirective with programmatic configuration:
+@Component({
+  hostDirectives: [{ directive: CloseOnScrollDirective, outputs: ['closeOnScroll'] }],
+  host: { '(closeOnScroll)': 'close()' },
+})
+export class MyOverlayComponent {
+  readonly #closeOnScroll = inject(CloseOnScrollDirective, { self: true });
+  readonly panel = viewChild<ElementRef<HTMLElement>>('panel');
+
+  constructor() {
+    effect(() => {
+      this.#closeOnScroll.closeOnScrollWhen.set(this.isOpen());
+      this.#closeOnScroll.closeOnScrollExclude.set(this.panel()?.nativeElement);
+    });
+  }
+}
+```
+
 ## Breakpoints Table
 
 | Breakpoint   | CSS Media Query Selector                      |

libs/ui/layout/src/index.ts

@@ -1,3 +1,4 @@
 export * from './lib/breakpoint.directive';
 export * from './lib/breakpoint';
+export * from './lib/close-on-scroll.directive';
 export * from './lib/in-viewport.directive';

libs/ui/layout/src/lib/close-on-scroll.directive.ts

@@ -0,0 +1,133 @@
+// TODO: Consider moving to ui/common (don't exist) or ui/overlay (don't exist) - this directive handles overlay scroll behavior, not layout
+import {
+  Directive,
+  effect,
+  inject,
+  model,
+  OnDestroy,
+  output,
+} from '@angular/core';
+import { DOCUMENT } from '@angular/common';
+import { logger } from '@isa/core/logging';
+
+/**
+ * Directive that emits an event when scrolling occurs outside a specified element.
+ *
+ * This directive listens to all scroll events in capture phase and emits `closeOnScroll`
+ * when scrolling happens anywhere except within the excluded element (e.g., dropdown overlay panel).
+ *
+ * Use case: Close dropdown when user scrolls the page, but keep it open when scrolling within dropdown options.
+ *
+ * @example
+ * ```typescript
+ * // As hostDirective with programmatic configuration:
+ * hostDirectives: [{ directive: CloseOnScrollDirective, outputs: ['closeOnScroll'] }]
+ *
+ * // In component:
+ * readonly #closeOnScroll = inject(CloseOnScrollDirective, { self: true });
+ * readonly panel = viewChild<ElementRef<HTMLElement>>('panel');
+ *
+ * constructor() {
+ *   effect(() => {
+ *     this.#closeOnScroll.closeOnScrollWhen.set(this.isOpen());
+ *     this.#closeOnScroll.closeOnScrollExclude.set(this.panel()?.nativeElement);
+ *   });
+ * }
+ *
+ * // In host:
+ * host: { '(closeOnScroll)': 'close()' }
+ * ```
+ */
+@Directive({
+  selector: '[uiCloseOnScroll]',
+  standalone: true,
+})
+export class CloseOnScrollDirective implements OnDestroy {
+  readonly #logger = logger(() => ({ directive: 'CloseOnScrollDirective' }));
+  #document = inject(DOCUMENT);
+  #scrollListener?: (event: Event) => void;
+  #isActive = false;
+
+  /**
+   * When true, the directive listens for scroll events.
+   * Bind this to your open state (e.g., `closeOnScrollWhen.set(isOpen())`).
+   */
+  closeOnScrollWhen = model<boolean>(false);
+
+  /**
+   * Element to exclude from scroll detection.
+   * If scroll occurs within this element or its children, the closeOnScroll event will NOT be emitted.
+   */
+  closeOnScrollExclude = model<HTMLElement | undefined>(undefined);
+
+  /**
+   * Emitted when scrolling occurs outside the excluded element.
+   */
+  closeOnScroll = output<void>();
+
+  constructor() {
+    // Auto-activate/deactivate based on closeOnScrollWhen input
+    effect(() => {
+      const shouldBeActive = this.closeOnScrollWhen();
+      if (shouldBeActive && !this.#isActive) {
+        this.#activate();
+      } else if (!shouldBeActive && this.#isActive) {
+        this.#deactivate();
+      }
+    });
+  }
+
+  #activate(): void {
+    if (this.#isActive) {
+      return;
+    }
+
+    this.#scrollListener = (event: Event) => {
+      const target = event.target as HTMLElement;
+      const excludeElement = this.closeOnScrollExclude();
+
+      // Check if scroll happened within the excluded element
+      if (excludeElement?.contains(target)) {
+        return;
+      }
+
+      // Emit close event - scroll happened outside excluded element
+      this.#logger.debug('Scroll detected outside panel, emitting close');
+      this.closeOnScroll.emit();
+    };
+
+    // Use capture: true to catch scroll events from ALL elements (scroll events don't bubble)
+    // Use passive: true for better performance (we don't call preventDefault)
+    this.#document.defaultView?.addEventListener(
+      'scroll',
+      this.#scrollListener,
+      {
+        capture: true,
+        passive: true,
+      },
+    );
+
+    this.#isActive = true;
+    this.#logger.debug('Activated scroll listener');
+  }
+
+  #deactivate(): void {
+    if (!this.#isActive || !this.#scrollListener) {
+      return;
+    }
+
+    this.#document.defaultView?.removeEventListener(
+      'scroll',
+      this.#scrollListener,
+      { capture: true },
+    );
+
+    this.#scrollListener = undefined;
+    this.#isActive = false;
+    this.#logger.debug('Deactivated scroll listener');
+  }
+
+  ngOnDestroy(): void {
+    this.#deactivate();
+  }
+}