---
title: "isEligible(for:completionHandler:)"
framework: BrowserKit
role: symbol
role_heading: Type Method
platforms: [iOS 18.4+, iPadOS 18.4+]
path: "browserkit/beavailability/iseligible(for:completionhandler:)"
---

# isEligible(for:completionHandler:)

Tests whether the device is eligible to use an app that contains an alternative browser engine.

## Declaration

```swift
class func isEligible(for context: BEAvailability.Context, completionHandler: @escaping @Sendable (Bool, (any Error)?) -> Void)
```

```swift
class func isEligible(for context: BEAvailability.Context) async throws -> Bool
```

## Parameters

- `context`: The type of app for which you test eligibility.
- `completionHandler`: A closure that receives the result of the eligibility check, and an error if any occurs.

## Discussion

Discussion The completion handler in the synchronous version of this method receives true as its first parameter if the device is eligible to run a version of the app that contains an alternative browser engine; otherwise, it receives false. The second parameter that the completion handler receives is an error if any occurs; otherwise, it’s nil. The async version of this method returns true if the device is eligible to run a version of the app that contains an alternative browser engine; otherwise, it returns false. The method throws an error if it encounters one. To use the BEAvailability.Context.webBrowser context to test whether the device is eligible to use a web browser with an alternative browser engine, your app needs to have the com.apple.developer.web-browser entitlement. For information on adopting the web browser entitlement, see Preparing your app to be the default web browser.