jQuery UI Focus Stealing

Second answer I've found is that in the following code jQuery binds document to dialog. So when I unbind this when I click on the desired button's onclick event (or whatever event you're handling):

 if (window.jQuery && window.jQuery.ui.dialog) {
   $(document).unbind("focusin.dialog");
 }

This is where jQuery UI binds it _focusTabble() method to focusin.dialog event of document.

if ( !$.ui.dialog.overlayInstances ) {
            // Prevent use of anchors and inputs.
            // We use a delay in case the overlay is created from an
            // event that we're going to be cancelling. (#2804)
            this._delay(function() {
                // Handle .dialog().dialog("close") (#4065)
                if ( $.ui.dialog.overlayInstances ) {
                    this.document.bind( "focusin.dialog", function( event ) {
                        if ( !$( event.target ).closest(".ui-dialog").length &&
                                // TODO: Remove hack when datepicker implements
                                // the .ui-front logic (#8989)
                                !$( event.target ).closest(".ui-datepicker").length ) {
                            event.preventDefault();
                            $(".ui-dialog:visible:last .ui-dialog-content")
                                .data("ui-dialog")._focusTabbable();
                        }
                    });
                }
            });
        }

What I did to solve this problem is to comment out this $(".ui-dialog:visible:last .ui-dialog-content").data("ui-dialog")._focusTabbable();

You can find the complete code below:

    if ( !$.ui.dialog.overlayInstances ) {
        // Prevent use of anchors and inputs.
        // We use a delay in case the overlay is created from an
        // event that we're going to be cancelling. (#2804)
        this._delay(function() {
            // Handle .dialog().dialog("close") (#4065)
            if ( $.ui.dialog.overlayInstances ) {
                this.document.bind( "focusin.dialog", function( event ) {
                    if ( !$( event.target ).closest(".ui-dialog").length &&
                            // TODO: Remove hack when datepicker implements
                            // the .ui-front logic (#8989)
                            !$( event.target ).closest(".ui-datepicker").length ) {
                        event.preventDefault();
                        //$(".ui-dialog:visible:last .ui-dialog-content")
                            //.data("ui-dialog")._focusTabbable();
                    }
                });
            }
        });
    }