Method getElementHandler

src/event-manager.js:314–335

* @param {Element | object} target * @param {string} propertyName

(target, propertyName)

   * @param {string} propertyName
   */
  getElementHandler(target, propertyName) {
    let tagName;
    let lookup = this.elementHandlerLookup;

    if (target.tagName) {
      tagName = target.tagName.toLowerCase();

      if (lookup[tagName] && lookup[tagName][propertyName]) {
        return new EventSubscriber(lookup[tagName][propertyName]);
      }

      if (propertyName === 'textContent' || propertyName === 'innerHTML') {
        return new EventSubscriber(lookup['content editable'].value);
      }

      if (propertyName === 'scrollTop' || propertyName === 'scrollLeft') {
        return new EventSubscriber(lookup['scrollable element'][propertyName]);
      }
    }

    return null;
  }

  /**
   * @param {EventTarget} target