@tko/computed/dist/when.js

TKO Computed Observables

// @tko/computed 🥊 4.0.0-beta1.3 ESM
import {
  pureComputed
} from "./computed";
function kowhen(predicate, context, resolve) {
  const observable = pureComputed(predicate, context).extend({ notify: "always" });
  const subscription = observable.subscribe((value) => {
    if (value) {
      subscription.dispose();
      resolve(value);
    }
  });
  observable.notifySubscribers(observable.peek());
  return subscription;
}
export function when(predicate, callback, context) {
  const whenFn = kowhen.bind(null, predicate, context);
  return callback ? whenFn(callback.bind(context)) : new Promise(whenFn);
}