How can I get URL altering in swift webview?

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I’ve this View with a WebView to show an online web page into an app.

How can I detect the url adjustments of the WebView, and save this url in a UserDefaults variable?

import SwiftUI
import WebKit

struct video: View {
    
    non-public let urlString: String = "https://www.google.com"
    
    var physique: some View {
        // Regular WebView
        VideoWebView(url: URL(string: urlString)!)
            .shadow(coloration: .black.opacity(0.3), radius: 20.0, x: 5, y: 5)
    }
}

// WebView Struct
struct VideoWebView: UIViewRepresentable {
    
    var url: URL
    
    func makeUIView(context: Context) -> WKWebView {
        return WKWebView()
    }
    
    func updateUIView(_ webView: WKWebView, context: Context) {
        let request = URLRequest(url: url)
        webView.load(request)
    }
}

struct video_Previews: PreviewProvider {
    static var previews: some View {
        video()
    }
}

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