ObservableArray currently implements some of the ES-5 Array functions, including: indexOf(), forEach(), map(), filter(), find(), every(), some() Like the other Array functions, ObservableArray should use the native implementations of these functions if the browser implements them (IE9+, Firefox, Webkit, etc.).
Hello,
Arrow functions are supported for most of the methods. Here is an exemplary use.
As for the observable object we have a specific implementation that meets our needs if there are specific use cases that should be handled please open a separate feature request.
Regards,
Angel Petrov
Progress Telerik
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I would also replace ObservableObject by Object.observe