rimmel/dist/esm/types/futures.js

A Streams-Oriented UI library for the Rx.Observable Universe

import '../constants.js';

const isObserver = (x) => 
// FIXME: it should actually be x?.next || x?.error || x?.complete
// or a function
!!x?.next;
const isObservable = (x) => !!x?.subscribe;
const isPromise = (x) => !!x?.then;
const isFuture = (x) => isPromise(x) || isObservable(x);

export { isFuture, isObservable, isObserver, isPromise };
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