Tell us about the implementation of CDK Virtual Scroll - what problems did you solve and what difficulties did you encounter?

CDK Virtual Scroll was implemented to optimize the display of long lists and improve application performance. The main issue was rendering a large number of items, which significantly slowed down the interface.

Difficulties arose with correctly setting the sizes of elements and handling dynamic content, as Virtual Scroll requires fixed element heights for proper operation. It was also necessary to refine the data loading logic during scrolling to avoid flickering and delays.

Example of usage:

import {CdkVirtualScrollViewport} from '@angular/cdk/scrolling';

@Component({ /* ... */ })
export class ExampleComponent {
  items = Array.from({length: 10000}).map((_, i) => `Item #${i}`);
}

// In the template
// <cdk-virtual-scroll-viewport itemSize="50" class="viewport">
//   <div *cdkVirtualFor="let item of items">{{item}}</div>
// </cdk-virtual-scroll-viewport>

This approach significantly reduced DOM load and improved interface responsiveness.