How does Angular CDK's a11y package help improve accessibility in an app?

The Angular CDK includes a dedicated a11y package with tools like FocusTrap, which keeps keyboard focus inside a dialog while it is open, and LiveAnnouncer, which lets you announce dynamic messages to screen reader users that would otherwise go unnoticed.

import { LiveAnnouncer } from '@angular/cdk/a11y';

constructor(private liveAnnouncer: LiveAnnouncer) {}

saveForm() {
  this.liveAnnouncer.announce('Your changes have been saved');
}