# Javascript

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.

<figure><img src="/files/6flYJr0jz0eCtw887qNd" alt=""><figcaption></figcaption></figure>

Custom component example:

{% embed url="<https://www.loom.com/share/db78518bf2d04c389af64ac477e8045b>" %}


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