@microsoft/fast-element > Binding > createObserver
Binding.createObserver() method
Creates an observer capable of notifying a subscriber when the output of a binding changes.
Signature:
abstract createObserver(subscriber: Subscriber, directive: BindingDirective): ExpressionObserver<TSource, TReturn, TParent>;
Parameters
|
Parameter |
Type |
Description |
|---|---|---|
|
subscriber |
The subscriber to changes in the binding. | |
|
directive |
The Binding directive to create the observer for. |
Returns:
ExpressionObserver<TSource, TReturn, TParent>