/Javascript/AngularJS/Angular observer if not length

Angular observer if not length

<div>
    Length: {{(list$ | async)?.length}}
    <div *ngIf="(list$ | async)?.length>0">
        <ul>
            <li *ngFor="let item of (list$ | async)">
                {{item.firstName}}
            </li>
        </ul>
    </div>
</div>

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An unhandled exception occurred: ENOENT: no such file or directory, lstat 'C:\Users\hp\Desktop\New folder\node_modules' See "C:\Users\hp\AppData\Local\Temp\ng-uhxyh2\angular-errors.log" for further details.
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