@lifaon/rx-js-light

Version:

Blazing fast Observables

23 lines (22 loc) • 549 B

JavaScript

export function mergeAllSingleObservable(subscribe) {
  return emit => {
    let running = true;
    let childUnsubscribeFunction;
    const unsubscribeChild = () => {
      if (childUnsubscribeFunction !== void 0) {
        childUnsubscribeFunction();
      }
    };
    const unsubscribe = subscribe(childSubscribe => {
      unsubscribeChild();
      childUnsubscribeFunction = childSubscribe(emit);
    });
    return () => {
      if (running) {
        running = false;
        unsubscribe();
        unsubscribeChild();
      }
    };
  };
}