1. On your iPhone/iPad: Enable Web Inspector . Open “Settings” → “Safari” → “Advanced”.
2. On your desktop/laptop: Enable Developer tools in Safari. Open “Preferences” → “Advanced” check “Show Develop menu in menu bar”.
3. Connect your iPhone via USB to your desktop/laptop.
4. Start the application on your iPad/iPhone via XCode.
5. On your desktop/laptop: Open the Safari Web Inspect debugger. Go to “Preferences” → “Your phone” → “index.html”.
You can automate the last step by [using applescript to open Safari's Web Inspector](http://snippets.aktagon.com/snippets/715-how-to-open-safari-s-web-inspector-with-applescript-to-debug-phonegap-app).
Note: Use CMD+R to reload index.html.