Hi
Unfortunately, I'm stuck here, perhaps someone can help me.
When I click a button, my app opens a compound link in the mobile device's installed browser. I want the links to open in an internal web view browser. The links only return a short line of text as a response. When I execute a link, a small window with the link response should open, which should close automatically after 5 seconds. It's important that I can also define the user agents. How do I put the blocks together so that a small web view window with the attached HTML code (as an example) is displayed?
Summary
Interner Browser * { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Roboto', sans-serif; }    body {
        background: #2c3e50;
        color: #ecf0f1;
        height: 100vh;
        display: flex;
        flex-direction: column;
    }
    
    .header {
        background: #3498db;
        padding: 15px;
        text-align: center;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }
    
    h1 {
        font-size: 1.4rem;
        font-weight: 500;
    }
    
    .browser-container {
        flex: 1;
        padding: 15px;
        display: flex;
        flex-direction: column;
    }
    
    .browser-window {
        flex: 1;
        border-radius: 12px;
        overflow: hidden;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        background: white;
    }
    
    iframe {
        width: 100%;
        height: 100%;
        border: none;
    }
    
    .status {
        text-align: center;
        margin-top: 15px;
        font-size: 14px;
        color: #bdc3c7;
    }
    
    .loading {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100%;
        flex-direction: column;
    }
    
    .spinner {
        width: 50px;
        height: 50px;
        border: 5px solid rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        border-top-color: #3498db;
        animation: spin 1s ease-in-out infinite;
        margin-bottom: 15px;
    }
    
    @keyframes spin {
        to { transform: rotate(360deg); }
    }
    
    @media (max-width: 600px) {
        h1 {
            font-size: 1.2rem;
        }
        
        .browser-container {
            padding: 10px;
        }
    }
</style>
    App Interner Browser
<div class="browser-container">
    <div class="browser-window">
        <iframe id="browserFrame" src="about:blank"></iframe>
    </div>
    <div class="status" id="statusText">Bereit</div>
</div>
<script>
    document.addEventListener('DOMContentLoaded', function() {
        const browserFrame = document.getElementById('browserFrame');
        const statusText = document.getElementById('statusText');
        
        // Moderner User-Agent für Android
        const userAgent = 'Mozilla/5.0 (Linux; Android 10; Pixel 4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.120 Mobile Safari/537.36';
        
        // Funktion zum Laden einer URL
        function loadUrl(url) {
            if (!url) return;
            
            statusText.textContent = "Lade Seite...";
            
            // Stelle sicher, dass die URL mit http:// oder https:// beginnt
            if (!url.startsWith('http://') && !url.startsWith('https://')) {
                url = 'https://' + url;
            }
            
            // Setze den User-Agent für die Anfrage
            const xhr = new XMLHttpRequest();
            xhr.open('GET', url);
            xhr.setRequestHeader('User-Agent', userAgent);
            xhr.onreadystatechange = function() {
                if (xhr.readyState === 4) {
                    if (xhr.status === 200) {
                        // Erstelle ein Blob mit dem Inhalt und setze es als Quelle
                        const blob = new Blob([xhr.responseText], { type: 'text/html' });
                        const blobUrl = URL.createObjectURL(blob);
                        browserFrame.src = blobUrl;
                        statusText.textContent = "Geladen: " + url;
                    } else {
                        statusText.textContent = "Fehler beim Laden der Seite";
                    }
                }
            };
            xhr.send();
        }
        
        // Beispiel: Eine URL laden (kann durch App Inventor ersetzt werden)
        // In der Praxis würden Sie diese Zeile entfernen und die URL von App Inventor übergeben
        loadUrl("https://www.example.com");
    });
</script>
current composition of the blocks (works as it should)
Sorry for my bad English, many many thanks in advance for your help.




