Hi Taviz,
Thank you for Contacting Syncfusion support.
We have used dialog component in the feedback form in our website. You can refer the following demo and help link for this component.
Demo
You can refer the following UG link for Dialog component.
http://help.syncfusion.com/js/dialog/overview
You can refer the following API link for Dialog component.
http://help.syncfusion.com/js/api/ejdialog
Please let us know if you have further queries,
Regards,
Nithya G.