webView.swift

private extension WKWebView {
    func getUserAgent() async throws -> String? {
        try await withCheckedThrowingContinuation { continuation in
            evaluateJavaScript("navigator.userAgent") { (result, error) in
                if let error {
                    continuation.resume(throwing: error)
                } else if let userAgent = result as? String {
                    continuation.resume(returning: userAgent)
                }
            }
        }
    }
}