# 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="https://3448227606-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LQ08RFAKZvFADEiXKFy%2Fuploads%2F1nTq44Tf0mAPyqyeDUo9%2FUntitled%20(7).gif?alt=media&#x26;token=e9b78eff-4276-4924-a096-d30e7ffb9d49" alt=""><figcaption></figcaption></figure>

Custom component example:

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