}, The value can be one of the predefined positions: center (the default), left, right, top, or bottom. By using this website, you agree with our Cookies Policy. The default value is false. .ui-widget-header,.ui-state-default, ui-button{ Triggered after the dialog has been dragged. jQuery UI consists of GUI widgets, visual effects, and themes implemented using jQuery, CSS, and HTML. Application of an effect at the opening and closing of the