Calling a function inside of a *.qs file

[Doublelune27]

Hi,
I wanted to customize dynamically my small app (Qt 6.5.0, windows & linux), and therefore make use of script module.
I want to call a javascript function from an external *.qs file.
In my C++ app, I have tried this to call the script like this:

void MainWindow::onRunScript()    {
        QJSEngine myEngine;
    QString fileName = "run.qs";
    QFile scriptFile(fileName);
    if (!scriptFile.open(QIODevice::ReadOnly)) {
        // handle error
        qDebug() << "MainWindow::onRunScript : unable to open " << fileName;
    }
    QTextStream stream(&scriptFile);
    QString contents = stream.readAll();
    scriptFile.close();

    QQmlEngine::setObjectOwnership(this, QQmlEngine::CppOwnership);
    QJSValue LogicValue = myEngine.newQObject(this);
    myEngine.globalObject().setProperty("Main", LogicValue);
    QJSValue val = myEngine.evaluate(contents);
    if(val.isError())
    {
        qDebug() << val.errorType();
    }
}

No error until this, my file run.qs exists, and QJSValue resulted from QJSEngine is no error.
Here is my run.qs file:

(function() {
	Main.write(57,64);
})

Unfortunately, MainWindow::write(int,int) is never called.
I guess, the issue is in the *.qs file. I have added the outer parenthesis because of a warning from compiler
I didn't find any example to make this work. I barely remember of a *.mjs file that enabled several functions stand in the same file, but I did not find it either.
Can anyone give me a link to an explanation about the external javascript files format please?
thank you,
Claude