rxjs/src/symbol/rxSubscriber.ts

Reactive Extensions for modern JavaScript

import { root } from '../util/root';

const Symbol: any = root.Symbol;

export const rxSubscriber = (typeof Symbol === 'function' && typeof Symbol.for === 'function') ?
  Symbol.for('rxSubscriber') : '@@rxSubscriber';

/**
 * @deprecated use rxSubscriber instead
 */
export const $$rxSubscriber = rxSubscriber;