After opening mat-autocomplete, when I scroll my page then I want mat-autocomplete to be sticky.
Step 1:
@ViewChild('alertInput', { read: MatAutocompleteTrigger })
autoComplete: MatAutocompleteTrigger;
Step 2: Write this line on ngOnInit()
window.addEventListener('scroll', this.scrollEvent, true);
Step 3: Define this function
scrollEvent = (event: any): void => {
if (this.autoComplete.panelOpen) this.autoComplete.updatePosition();
}