Interface Signal<T>

interface Signal<T> {
empty: boolean;
listen(handler: EventHandler<T>, options?: SignalOptions): Unsubscribe;
}

Type Parameters

T

Implemented by

SignalImpl

Index

Properties

Methods

Properties

`Readonly`empty

empty: boolean

Returns true if this signal has no handlers.

Methods

listen

listen(handler, options?): Unsubscribe
Adds an event handler that will be invoked upon signal dispatch.
Parameters
- handler: EventHandler<T>
  The handler to invoke on signal dispatch.
- Optionaloptions: SignalOptions
  Options for changing listening behavior.
Returns Unsubscribe
Unsubscribe - Returns a method where, when invoked, will remove the handler. If the handler has already been removed, Unsubscribe will do nothing.
- Defined in event/Signal.ts:32