> For the complete documentation index, see [llms.txt](https://halosoft.gitbook.io/ella-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://halosoft.gitbook.io/ella-documentation/theme-settings/custom-js.md).

# Custom JS

JS (Javascript) is a scripting or programming language that allows you to implement complex features on web pages.

We attached a JS file in Ella source so that you can customize the site by yourself.

**Step 1:  Enable the Custom JS file:**

1. From your Shopify admin, go to **Online Store** **->** **Themes**.
2. Find the theme that you want to edit, and then click **Customize**.
3. Click **Theme Settings ->** scroll down to the bottom -> **Custom JS.**

<figure><img src="/files/6u0PUvEMJ2nN7AIG7X3P" alt=""><figcaption></figcaption></figure>

**Step 2:  Edit the Custom JS file:**

1. From your Shopify admin, go to **Themes** **->** **Actions** **->** **Edit Code.**
2. Find folder **Assets->** Open file **custom.js**

![](/files/WX9MKCKfuFYTK3JDpEhg)