Install libjs-jquery-ui by entering the following commands in the terminal:
sudo apt update sudo apt install libjs-jquery-ui
Description:
JavaScript UI library for dynamic web applications
jQuery UI provides abstractions for low-level interaction and animation, advanced effects and high-level, themeable widgets, built on top of the jQuery JavaScript Library, that you can use to build highly interactive web applications.
Homepage: https://jqueryui.com/
Version: 1.12.1+dfsg-5
Section: universe/web