[BUG] : Server side search NoEntriesfoundlabel not working fine always.

[Arjun-1r]

Describe the bug
When we search the dropdown unknown value it is expected to show No search results found for the search as per NoEntriesfoundlabel. But it is not working 100%.

To Reproduce
See it in action at https://stackblitz.com/github/bithost-gmbh/ngx-mat-select-search-example

1. Go to the example
2. On server-side search dropdown type in 'dddddd' some unknown input.

Expected behavior
No results found the label should be displayed.

Screenshots
Screenshot not needed. In the example itself, we can see.

Desktop (please complete the following information):

• OS: Windows
• Browser: Chrome

Additional context
Please solve this bug.

[macjohnny]

@Arjun-1r thanks for reporting.
I guess this is due to

ngx-mat-select-search/src/app/mat-select-search/mat-select-search.component.ts

Lines 343 to 349 in 8cf1cf5

	if (this.matOption) {
	if (this._noEntriesFound()) {
	this.matOption._getHostElement().classList.add('mat-select-search-no-entries-found');
	} else {
	this.matOption._getHostElement().classList.remove('mat-select-search-no-entries-found');
	}
	}

not being invoked, since no options change when initially typing a keyword that leads to no results

ngx-mat-select-search/src/app/mat-select-search/mat-select-search.component.ts

Lines 306 to 310 in 8cf1cf5

	this._options.changes
	.pipe(
	takeUntil(this._onDestroy)
	)
	.subscribe((optionChanges: QueryList<MatOption>) => {