@testim/testim-cli/rx/src/core/linq/observable/fromevent-modern.js

Command line interface for running Testing on you CI

  function createListener (element, name, handler) {
    if (element.addEventListener) {
      element.addEventListener(name, handler, false);
      return disposableCreate(function () {
        element.removeEventListener(name, handler, false);
      });
    }
    throw new Error('No listener found');
  }

  function createEventListener (el, eventName, handler) {
    var disposables = new CompositeDisposable();

    // Asume NodeList or HTMLCollection
    var toStr = Object.prototype.toString;
    if (toStr.call(el) === '[object NodeList]' || toStr.call(el) === '[object HTMLCollection]') {
      for (var i = 0, len = el.length; i < len; i++) {
        disposables.add(createEventListener(el.item(i), eventName, handler));
      }
    } else if (el) {
      disposables.add(createListener(el, eventName, handler));
    }

    return disposables;
  }

  /**
   * Configuration option to determine whether to use native events only
   */
  Rx.config.useNativeEvents = false;

  /**
   * Creates an observable sequence by adding an event listener to the matching DOMElement or each item in the NodeList.
   *
   * @example
   *   var source = Rx.Observable.fromEvent(element, 'mouseup');
   *
   * @param {Object} element The DOMElement or NodeList to attach a listener.
   * @param {String} eventName The event name to attach the observable sequence.
   * @param {Function} [selector] A selector which takes the arguments from the event handler to produce a single item to yield on next.
   * @returns {Observable} An observable sequence of events from the specified element and the specified event.
   */
  Observable.fromEvent = function (element, eventName, selector) {
    // Node.js specific
    if (element.addListener) {
      return fromEventPattern(
        function (h) { element.addListener(eventName, h); },
        function (h) { element.removeListener(eventName, h); },
        selector);
    }

    // Use only if non-native events are allowed
    if (!Rx.config.useNativeEvents) {
      // Handles jq, Angular.js, Zepto, Marionette, Ember.js
      if (typeof element.on === 'function' && typeof element.off === 'function') {
        return fromEventPattern(
          function (h) { element.on(eventName, h); },
          function (h) { element.off(eventName, h); },
          selector);
      }
    }
    return new AnonymousObservable(function (observer) {
      return createEventListener(
        element,
        eventName,
        function handler (e) {
          var results = e;

          if (selector) {
            try {
              results = selector(arguments);
            } catch (err) {
              return observer.onError(err);
            }
          }

          observer.onNext(results);
        });
    }).publish().refCount();
  };