title: SwiftUI WebKit WKWebView: how to support multi url
body: <p>I dev a web, now want to dev iOS app.</p>
  <p>my idea is:
  by menu change new url</p>
  <pre><code>struct ContentView: View {
      var body: some View {
          Webview(url: &quot;https://readmorejoy.com&quot;)
          HStack {
              Menu(&quot;Menu&quot;) {
                  Button(&quot;menu1&quot;, action: {
  //                    Webview(url: &quot;https://readmorejoy.com&quot;)
                  })
                  Button(&quot;menu2&quot;, action: {})
                  Button(&quot;menu3&quot;, action: {})
              }
          }
      }
  }
  </code></pre>