@harishreddym/baqend/realtime/observable.js

Baqend JavaScript SDK

'use strict';

/* global Observable */
/* global Rx */
/* eslint-disable global-require */

/*
 * loads the observalbe from the global context, the global Rx variable or try to load Rx.js, fallback to core-js shim
 * The Observable can be overwritten by setting the require('baqend/realtime').Observable = Observable afterwards
 */
if (typeof Rx !== 'undefined') {
  module.exports = Rx.Observable;
} else {
  try {
    module.exports = require('rxjs/Observable').Observable;
  } catch (e) {
    if (typeof Observable === 'undefined') {
      // load Observable shim
      require('core-js/modules/es7.symbol.observable');
      require('core-js/modules/es7.observable');
      const sub = Observable.prototype.subscribe;

      // patch subscribe until core-js implements the new proposal
      // https://github.com/zloirock/core-js/issues/257
      Observable.prototype.subscribe = function subscribe(onNext, onError, onComplete) {
        if (onNext instanceof Function) {
          return sub.call(this, {
            next: onNext,
            error: onError,
            complete: onComplete,
          });
        }
        return sub.call(this, onNext);
      };
    }

    module.exports = Observable;
  }
}