```
### **Step 2: Add the Debugging Logic to `app.js`**
Next, we need to tell your JavaScript to send messages and errors to this new on-screen console.
1. Open your `scripts/app.js` file.
2. **At the very top of the file**, paste the following code. This function will be our new logger.
```javascript
// scripts/app.js
// --- On-Screen Debugger ---
function logToScreen(message) {
const logContainer = document.getElementById('debug-log');
if (logContainer) {
// Convert non-string messages to a readable string format
if (typeof message !== 'string') {
message = JSON.stringify(message, null, 2);
}
logContainer.innerHTML += `
> ${message}
`;
// Auto-scroll to the bottom
logContainer.parentElement.scrollTop = logContainer.parentElement.scrollHeight;
}
}
// Redirect all console errors to our on-screen logger
window.onerror = function(message, source, lineno, colno, error) {
logToScreen(`ERROR: ${message} at ${source.split('/').pop()}:${lineno}`);
return true; // Prevents the error from stopping script execution in some browsers
};
// --- End On-Screen Debugger ---
// --- Module Imports ---
import { initUI } from './ui.js';
import { initChat } from './chat.js';
import { initVideo } from './video.js';
// --- Main App Initialization ---
document.addEventListener('DOMContentLoaded', () => {
logToScreen("DOM fully loaded. Initializing modules...");
// Make the logger globally available so other modules can use it
window.logToScreen = logToScreen;
try {
initUI();
logToScreen("UI module initialized successfully.");
initChat();
logToscreen("Chat module initialized successfully.");
initVideo();
logToScreen("Video module initialized successfully.");
} catch(e) {
logToScreen(`A critical error occurred during initialization: ${e.message}`);
}
logToScreen("Application setup complete.");
});
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