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reference

Types​

function reference<GValue>(
  getValue: IGetReferenceValue<GValue>,
): IObservable<GValue>
interface IGetReferenceValue<GValue> {
  (): GValue;
}

Definition​

Creates an Observable, which on subscribe, will call getValue and emits the returned value.

Diagram​

Example​

Deferred usage of the variable 'value'​

// let's assume we don't know yet the value to assign
let value: number;

const subscribe = reference(() => value);

const destination = (value: number) => {
  console.log(value);
};

// LATER
value = 1;
subscribe(destination); // output '1'

value = 2;
subscribe(destination); // output '2'