> For the complete documentation index, see [llms.txt](https://docs.jetadmin.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.jetadmin.io/classic-app-builder/actions-and-logic/javascript.md).
# Javascript
Use JavaScript to interact with the UI Components, APIs, and Database Queries during this process of building applications.
In this guide, we’ll be looking at some of the basic operations with JavaScript to help us understand how easy and fun building apps on Jet Admin:
* Using Javascript for Computed Columns and Binding Data
* Creating Custom Components using Javascript and HTML/CSS
* Data Transformation
If you are new to Javascript, the following courses help you to fill the gap:
* Codecademy—[Learn JavaScript](https://www.codecademy.com/learn/introduction-to-javascript) (Full curriculum)
* learn-js—[Learn JavaScript](https://www.learn-js.org/) (Simple docs)
Computed Column example:
In this example, JavaScript is used to do a simple calculation: divide one column value by another.
Custom component example:
{% embed url="" %}
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