What is jQuery UI used for?
jQuery UI is a curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library. Whether you're building highly interactive web applications or you just need to add a date picker to a form control, jQuery UI is the perfect choice.
How to use icons in jQuery?
In widgets where you set the icon with a data-icon attribute you use the name of the icon as value. For example: data-icon="arrow-r" . To add an icon to link buttons and button elements, use the name prefixed with ui-icon- as class. For example: ui-icon-arrow-r .