If you want to use live regions in your application, refer to the Live Region module on npm.
<div aria-live="assertive" role="log" aria-relevant="additions" aria-atomic="true"></div>
Why Use Live Regions?
In an ideal world, I would’ve been able to simply rely on the drag-and-drop ARIA attributes
... read the whole story at www.smashingmagazine.com.
aria-dropeffect. However, in reality, the support for these attributes is rare, and where supported, the experience is confusing and counterintuitive for screen reader users. On top of that, these two attributes have been deprecated since ARIA 1.1, which means we won’t see support for these attributes grow in the future.