getElementListener() {
        if (this.fullPageListening) {
          return window.document;
        }
    
        if (typeof this.settings["mouse-event-element"] === "string") {
          const mouseEventElement = document.querySelector(this.settings["mouse-event-element"]);
    
          if (mouseEventElement) {
            return mouseEventElement;
          }
        }
    
        if (this.settings["mouse-event-element"] instanceof Node) {
          return this.settings["mouse-event-element"];
        }
    
        return this.element;
      }
Method returns element what will be listen mouse events
@return {Node}