syntax.duplicate-ids.qdoc

Go to the documentation of this file.

// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
 
/*!
\page qmllint-warnings-and-errors-syntax.duplicate-ids.html
\ingroup qmllint-warnings-and-errors
 
\title Duplicate id
\brief [syntax.duplicate-ids] An id is not unique.
 
\qmllintwarningcategory syntax.duplicate-ids
 
\section1 Found a duplicated id
 
\section2 What happened?
You used the same value for different \l{qtqml-syntax-objectattributes.html#the-id-attribute}{ids}.
 
\section2 Why is this bad?
The QML language forbids duplicate ids: they should all be unique in the same QML component.
 
\section2 Example
\qml
import QtQuick
 
Item {
    id: root
    Item {
        id: root
    }
}
 
\endqml
To fix this warning, rename the duplicate to become unique:
\qml
import QtQuick
 
Item {
    id: root
    Item {
        id: notRoot
    }
}
 
\endqml
*/