> ## Documentation Index
> Fetch the complete documentation index at: /llms.txt
> Use this file to discover all available pages before exploring further.
# Code Diff
> An edit shown as a colored diff — removed lines collapse in red, added lines expand in green.
# Code Diff
An edit shown as a colored diff — removed lines collapse in red, added lines expand in green.
**Code Diff**
```html code-diff.html
Code Diff
```
Copy npx hyperframes add code-diff to the clipboard
That writes one file: `compositions/code-diff.html`.
## Add it to your video
It runs for 6 seconds at 1920×1080. Paste this into your composition:
```html index.html
```
Move it in time with `data-start`. Put it on a different timeline row with
`data-track-index`. See [data attributes](/concepts/data-attributes.md) for the rest.
{/* hf:generated-footer */}
Tagged `code` `code-animation` `diff` `developer`.
## Related topics
* [Browse the complete Catalog](/catalog.md)
* [Add assets and Catalog items in the browser editor](/studio/assets-and-blocks.md)
* [Put blocks together into one video](/concepts/compositions.md)