I've been using QML for 3 or 4 years now. My answers are tainted with experience. 1. JavaScript: is there only to facilitate manipulation of Items and elements

I've been using QML for 3 or 4 years now. My answers are tainted with experience. 1. JavaScript: is there only to facilitate manipulation of Items and elements. Use C++ for any logic 2. Deployment: Yes 3. Size: Yes 4: This sounds like you're doing it wrong. IDs are scoped to their context (usually the item and on down)