import WebKit

override func viewDidLoad() {
    super.viewDidLoad()

    // MARK: - Create WKWebView with configuration

    let configuration = WKWebViewConfiguration()
    let wkWebView = WKWebView(frame: "your frame", configuration: configuration)

    // MARk: - Add WKWebView to main view

    self.view.addSubview(wkWebView)

    let urlName = "yourUrl"

    if let url = URL(string: urlName) {
        wkWebView.load(URLRequest(url: url))
    }

}

private func clearAllCookies() {
    let cookieJar = HTTPCookieStorage.shared

    for cookie in cookieJar.cookies! {
        cookieJar.deleteCookie(cookie)
    }
}

private func clearCookiesFromSpecificUrl(yourUrl: String) {
    let cookieStorage: HTTPCookieStorage = HTTPCookieStorage.shared
    let cookies = cookieStorage.cookies(for: URL(string: yourUrl)!)
    for cookie in cookies! {
        cookieStorage.deleteCookie(cookie as HTTPCookie)
    }
}

// MARK: - Show confirm alert

func webView(_ webView: WKWebView, runJavaScriptConfirmPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping (Bool) -> Void) {

    let alertController = UIAlertController(title: nil, message: message, preferredStyle: .alert)

    alertController.addAction(UIAlertAction(title: "Ok", style: .default, handler: { (action) in
        completionHandler(true)
    }))

    alertController.addAction(UIAlertAction(title: "Cancel", style: .default, handler: { (action) in
        completionHandler(false)
    }))

    self.present(alertController, animated: true, completion: nil)
}

private var isPopUpAppeared = false

// MARK: - Show authorization tab

func webView(_ webView: WKWebView, createWebViewWith configuration: WKWebViewConfiguration, for navigationAction: WKNavigationAction, windowFeatures: WKWindowFeatures) -> WKWebView? {
    if navigationAction.targetFrame == nil {
        let popup = WKWebView(frame: self.view.frame, configuration: configuration)
        popup.uiDelegate = self
        self.view.addSubview(popup)
        isPopUpAppeared = true
        return popup
    }
    return nil
}

// MARK: - Close authorization tab

func webViewDidClose(_ webView: WKWebView) {
    if isPopUpAppeared {
        webView.removeFromSuperview()
    }
}