This warning category is spelled [duplicated-name] by qmllint.

Duplicated Property Name

What happened?

Multiple properties in the same QML component scope have the same name.

Why is this bad?

Components with duplicate property names will not be created at runtime: they will be null instead.

Example

import QtQuick

Item {
    property int helloWorld
    property int helloWorld
}

To fix this warning, remove the duplicate property or rename it:

import QtQuick

Item {
    property int helloWorld
}

Duplicated signal mame

What happened?

Multiple signals in the same QML component scope have the same name.

Why is this bad?

Components with duplicate signal names will not be created at runtime: they will be null instead.

Example

import QtQuick

Rectangle {
    signal helloWorld
    signal helloWorld
}

To fix this warning, remove the duplicate signal or rename it:

import QtQuick

Rectangle {
    signal helloWorld
}