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Add fern docs dev gif #6645

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972c5d7
add gif
devalog Aug 14, 2026
c0c7480
split screen
devalog Aug 14, 2026
1ebb773
add controls
devalog Aug 14, 2026
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Binary file added fern/products/docs/pages/preview-publish/images/fern-docs-dev.mp4
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25 changes: 16 additions & 9 deletions fern/products/docs/pages/preview-publish/preview-changes-locally.mdx
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Expand Up @@ -28,6 +28,22 @@ Install the following:
fern docs dev --port 3002
```

<Frame>
<video
src="./images/fern-docs-dev.mp4"
autoPlay
loop
playsInline
muted
controls
>
</video>
</Frame>

Your documentation will be available at `http://localhost:3000` (default) or the port you specified. If you attempt to run Fern on a port that's already in use, it will use the next available port.

Some features are disabled in local development, including search, SEO (favicon, auto-generated meta tags, etc.), and authentication.

<Warning>
On Windows, `fern docs dev` requires [long path support](https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation#enable-long-paths-in-windows-10-version-1607-and-later) to be enabled.

Expand All @@ -40,15 +56,6 @@ New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem' -Name
If you can't enable long path support, use [Windows Subsystem for Linux (WSL)](https://learn.microsoft.com/en-us/windows/wsl/install) to run `fern docs dev` in a Linux environment instead.
</Warning>

Your documentation will be available at `http://localhost:3000` (default) or the port you specified. If you attempt to run Fern on a port that's already in use, it will use the next available port.

<Note>
Some features are disabled in local development:
- Search
- SEO (favicon, auto-generated meta tags, etc.)
- Authentication
</Note>

<llms-only>
### Common errors

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