How can I avoid creating a property binding on initialization in QML?

Question

I want to create a custom QML component with two properties one and two, which should have default values when left uninitialized. In particular, i

Answer 1

A way to explicitly tell that you don't want a binding is to call an assignment in an expression block:

Rectangle {
  property int one: 1
  property int two: {two = 2 * one}
}

Unlike the approach of breaking the binding in onCompleted, the expression block avoids the creation and then destruction of a binding object, and it looks cleaner.