onenter property
      
      EventHandlerNonNull<Event> ?
      get
      onenter
      
    
    
    
Implementation
EventHandlerNonNull? get onenter => js_util.getProperty(this, 'onenter');
      
      set
      onenter
      (EventHandlerNonNull<Event> ? newValue) 
      
    
    
    
Implementation
set onenter(EventHandlerNonNull? newValue) {
  js_util.setProperty(this, 'onenter', newValue);
}