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Implement automatic workspace folders support for Chrome DevTools (#19949)

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Jarred Sumner
2025-05-28 00:25:30 -07:00
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docs/bundler/html.md
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@@ -206,6 +206,38 @@ Each call to `console.log` or `console.error` will be broadcast to the terminal
Internally, this reuses the existing WebSocket connection from hot module reloading to send the logs.
### Edit files in the browser
Bun's frontend dev server has support for [Automatic Workspace Folders](https://chromium.googlesource.com/devtools/devtools-frontend/+/main/docs/ecosystem/automatic_workspace_folders.md) in Chrome DevTools, which lets you save edits to files in the browser.
{% image src="/images/bun-chromedevtools.gif" alt="Bun's frontend dev server has support for Automatic Workspace Folders in Chrome DevTools, which lets you save edits to files in the browser." /%}
{% details summary="How it works" %}
Bun's dev server automatically adds a `/.well-known/appspecific/com.chrome.devtools.json` route to the server.
This route returns a JSON object with the following shape:
```json
{
"workspace": {
"root": "/path/to/your/project",
"uuid": "a-unique-identifier-for-this-workspace"
}
}
```
For security reasons, this is only enabled when:
1. The request is coming from localhost, 127.0.0.1, or ::1.
2. Hot Module Reloading is enabled.
3. The `chromeDevToolsAutomaticWorkspaceFolders` flag is set to `true` or `undefined`.
4. There are no other routes that match the request.
You can disable this by passing `development: { chromeDevToolsAutomaticWorkspaceFolders: false }` in `Bun.serve`'s options.
{% /details %}
## Keyboard Shortcuts
While the server is running: