> For the complete documentation index, see [llms.txt](https://insights.gitbook.io/ecomm-doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://insights.gitbook.io/ecomm-doc/customize/additional-js.md).

# Additional JS

### Themes > Customize > Additional JS

You should turn on to enable custom javascript, then add code you want to use 

![](https://608086965-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbNHVBFZEJBSIlJZSYaIQ%2Fuploads%2F5Cyq4plPVb3kuindiFjm%2Fimage.png?alt=media\&token=03b074d9-b4f3-4fea-b7ee-41fd35bc07e2)