doc: add qmllint quick attached property type warnings

Add description of the warning and an example on how to fix it.

Task-number: QTBUG-118112
Change-Id: Ic057c768945b3ef0e38ce80cd19a8ca0567c9ca5
Reviewed-by: Jaishree Vyas <jaishree.vyas@qt.io>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit 93c0ef04fa0a07a2e805fccd914b7e699ee12f43)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit ca1a665da99f439fcaec433ecd088a73cd70da9f)

1 files changed, 43 insertions, 0 deletions

diff --git a/src/qml/doc/src/qmllint/quick/attached-property-type.qdoc b/src/qml/doc/src/qmllint/quick/attached-property-type.qdoc
new file mode 100644
index 0000000000..493f1c1413
--- /dev/null
+++ b/src/qml/doc/src/qmllint/quick/attached-property-type.qdoc
@@ -0,0 +1,43 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
+
+/*!
+\page qmllint-warnings-and-errors-quick-attached-property-type.html
+\ingroup qmllint-warnings-and-errors
+
+\title Quick: Attached property type
+\brief Misuses of the Quick attached property types.
+
+\section1 Attached property must be attached to an object deriving from a particular type
+
+\section2 What happened?
+You instantiated an attached property in an object of the wrong type.
+
+\section2 Why is this bad?
+The attached property will not work.
+
+\section2 Example
+\qml
+import QtQuick
+
+Item {
+    QtObject {
+        LayoutMirroring.enabled: true
+    }
+}
+
+\endqml
+To fix this warning, change the enclosing type to inherit from the type
+mentioned in the warning message:
+
+\qml
+import QtQuick
+
+Item {
+    Item {
+        LayoutMirroring.enabled: true
+    }
+}
+
+\endqml
+*/