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# webExtensionController(_:focusedWindowFor:)

Called when an extension context requests the currently focused window.

```
optional func webExtensionController(_ controller: WKWebExtensionController, focusedWindowFor extensionContext: WKWebExtensionContext) -> (any WKWebExtensionWindow)?
```

## Parameters

`controller`

The web extension controller that is managing the extension.

`extensionContext`

The context in which the web extension is running.

## Discussion

This method can be optionally implemented by the app to designate the window currently in focus to the extension.

If not implemented, the first window in the result of [`webExtensionController(_:openWindowsFor:)`](/documentation/WebKit/WKWebExtensionControllerDelegate/webExtensionController(_:openWindowsFor:)) is used.

## See Also

[`webExtensionController(_:openWindowsFor:)`](/documentation/WebKit/WKWebExtensionControllerDelegate/webExtensionController(_:openWindowsFor:))

Called when an extension context requests the list of ordered open windows.


---

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