Function Signal

  • Defines a new stateless node and returns a reference to it. Once a realm instance publishes or subscribes to the node, an instance of that node it will be registered in the realm.

    Type Parameters

    • T

    Parameters

    • init: NodeInit<T> = noop

      an optional function that will be called when the node is registered in a realm. Can be used to create subscriptions and define relationships to other nodes. Any referred nodes will be registered in the realm automatically.

    • distinct: Distinct<T> = false

      true by default. The node emits values that are different from the previous value. Optionally, a custom distinct function can be provided if the node values are non-primitive.

    Returns NodeRef<T>

    Example

    const foo$ = Signal<string>(true, (r) => {
    r.sub(foo$, console.log)
    })
    const r = new Realm()
    r.pub(foo$, 'bar') // the subscription will log 'bar'

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