Data binding to observable throws error with strict type checking

[Megan]

I'm trying to set up a chart whose data is bound to an observable. Even using the exact example on observables provided on the data binding page, it fails to compile with the error "Type 'number[] | null' is not assignable to type 'any[]'." How can I resolve this?

[Megan]

I found the answer! Someone had the same problem in an entirely different Kendo widget.

The async pipe can return null, which was causing the problem. To fix it, change [data]="series | async" to [data]="(series | async)!", which assures the compiler that it will never be null.

Original post for reference: https://github.com/telerik/kendo-angular/issues/3210