---
title: "setReaderModeActive(_:for:completionHandler:)"
framework: webkit
role: symbol
role_heading: Instance Method
path: "webkit/wkwebextensiontab/setreadermodeactive(_:for:completionhandler:)"
---

# setReaderModeActive(_:for:completionHandler:)

Called to set the reader mode for the tab.

## Declaration

```swift
optional func setReaderModeActive(_ active: Bool, for context: WKWebExtensionContext, completionHandler: @escaping ((any Error)?) -> Void)
```

```swift
optional func setReaderModeActive(_ active: Bool, for context: WKWebExtensionContext) async throws
```

## Parameters

- `active`: A boolean value indicating whether to activate reader mode.
- `context`: The context in which the web extension is running.
- `completionHandler`: A block that must be called upon completion. It takes a single error argument, which should be provided if any errors occurred.

## Discussion

Discussion No action is performed if not implemented.

## See Also

### Related Documentation

- [isReaderModeAvailable(for:)](webkit/wkwebextensiontab/isreadermodeavailable(for:).md)
- [isReaderModeActive(for:)](webkit/wkwebextensiontab/isreadermodeactive(for:).md)