---
title: YUI (Yahoo User Interface) JavaScript Framework
description: The YUI JavaScript Framework is a roll up of the application, model, model list, router, and view components, combined to form a simple MVC style framework for writing single-page JavaScript applications.
image: https://www.e-zest.com/hubfs/Banners/Social/06%20sub%20service%20web.png
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# YUI JavaScript Framework
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YUI Library basically stands for Yahoo User Interface Library. It is an open source JavaScript library for building interactive web applications using techniques such as Ajax, DHTML and DOM scripting. YUI includes several core CSS resources.
The YUI JavaScript Framework is a roll up of the application, model, model list, router, and view components, combined to form a simple MVC style framework for writing single-page JavaScript applications.
We can use these components separately or together to create anything from simple non-interactive views to rich applications with URL-based routing, data binding, and full client-server synchronization.
**It has six types of components:**
- Core
- Utilities
- Controls
- CSS resources
- Developer tools
- Build tools
We at e-Zest are in complete pace with the new version of YUI rebuilt from the ground up to modernize the library and incorporate lessons learned from YUI 2. Among the enhancements are a CSS selector driven engine for retrieving DOM elements, a greater emphasis on granularity of modules, a smaller seed file that loads other modules when necessary, and a variety of syntactic changes intended to make writing code faster and easier.
At e-Zest, YUI is used because of its lightweight core and modular architecture which makes it scalable, fast, and robust. Therefore it is used by front-end engineers to build the most popular websites. YUI’s intuitive and well-documented API takes us from basic DOM handling to building performance and maintainable applications on desktop browsers, mobile devices, and servers.
e-Zest deals with simple web applications to the complex ones therefore a carefully architected infrastructure and a comprehensive set of tools are used by professionals to code and that is the reason we use YUI Library .It acts as a thriving community and it is our industrial strength.
It helps us with common DOM scripting tasks, including element positioning and CSS style management. It provides our developers with easy and safe access to browser events (such as mouse clicks and key presses). It also provides the Custom Event object for publishing and subscribing to custom events.
## Other related services
- [Prototype JavaScript framework](https://www.e-zest.com/prototype-javascript-framework)
## Related Insights
### [ Work Building scalable enterprise digital commerce for a global pharma giant Digital transformation around the e-commerce services across multiple geographies and business divisions for a globally leading pharma company.](https://www-e-zest-com.sandbox.hs-sites.com/building-scalable-enterprise-digital-commerce-for-a-global-pharma-giant)
### [ Work IoT solution for modular smart-cases A smart-case typically houses a battery pack, the main controller board and the electromechanical components that interface with the buttons/ports of the phone/tablet that fits into it. The need was to develop uniform solution across various platforms Android to Windows-based tablets and phones.](https://www-e-zest-com.sandbox.hs-sites.com/iot-solution-for-modular-smart-cases)
### [ Work Enabling unified experience with headless Magento and AEM for a Fortune 500 healthcare giant The client was looking for modern B2C e-commerce that would provide flexibility to the marketing team and unify end-user experience.](https://www-e-zest-com.sandbox.hs-sites.com/enabling-unified-experience-with-headless-magento-and-aem-for-a-fortune-500-healthcare-giant)
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