What are some alternatives?
When comparing DevExtreme and JQWidgets, you can also consider the following products
Kendo UI - Fast, light, complete: 70+ jQuery-based UI widgets in one powerful toolset
UIKit - A lightweight and modular front-end framework for developing fast and powerful web interfaces
Semantic UI - A UI Component library implemented using a set of specifications designed around natural language
Bootstrap - Simple and flexible HTML, CSS, and JS for popular UI components and interactions