Quick: Attached property type

This warning category is spelled [Quick.attached-property-type] by qmllint.

Attached property must be attached to an object deriving from a particular type

What happened?

You instantiated an attached property in an object of the wrong type.

Why is this bad?

The attached property will not work.

Example

 import QtQuick

 Item {
     QtObject {
         LayoutMirroring.enabled: true
     }
 }

To fix this warning, change the enclosing type to inherit from the type mentioned in the warning message:

 import QtQuick

 Item {
     Item {
         LayoutMirroring.enabled: true
     }
 }