EventSource

The EventSource class provides methods for monitoring signals.

Properties

This module exposes no properties.

Methods

Method	Description
`history`	history(framesCount: number): EventSourceHistory Returns an object used to access signal values from past frames. The amount of frames tracked is customizable via `framesCount` parameter. Historical signal values are going to be initialized with signal value at call time or using `initialValues` if provided.
`select`	select(property: string): EventSource Converts event source by selecting a property in the event object. Events without specified property are ignored.
`skip`	skip(count: number): EventSource Yields a filtered event source: the first `count` events from the original source are dropped, and subsequent ones signaled.
`subscribe`	subscribe(callback: (event: mixed) => void): Subscription Sets a callback for the event source. The callback will be invoked every time an event is emitted from this `EventSource`. See Also: `Subscription.unsubscribe`. Note: `subscribe` and `subscribeOnNext` functions are completely equivalent.
`subscribeOnNext`	subscribeOnNext(callback: (event: mixed) => void): Subscription Sets a callback for the event source. The callback will be invoked every time an event is emitted from this `EventSource`. See Also: `Subscription.unsubscribe`. Note: `subscribe` and `subscribeOnNext` functions are completely equivalent.
`subscribeWithSnapshot`	subscribeWithSnapshot(snapshot: { [name: string]: Signal}, callback: (event: mixed, snapshot: mixed) => void): Subscription Sets a callback for the event source, similar to `Subscribe` function, but with additional `Snapshot` parameter. `Snapshot` is a dictionary of String/Bool/Scalar signals, which will be passed as JSON to the callback function using lastValue from requested signals
`take`	take(count: number): EventSource Yields a filtered event source: the first `count` events from the original source are signaled, and subsequent ones ignored.