execute build-in javascript function

[TorAn]

I am trying to use QJSEngine to automate part of my application. I exposed the instance of QAction "viewsignals" to JSEngine and this code executes successfully:

QJSValue fun = myEngine.evaluate("(function(a, b) { viewsignals.trigger();}");
QJSValueList args;
args << 1 << 2;
fun.call(args);

QJSValue fun = myEngine.evaluate("(function(a, b) { viewsignals.trigger();}");
QJSValueList args;
args << 1 << 2;
fun.call(args);

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Next, I am trying to add "alert" to the function:

QJSValue fun = myEngine.evaluate("(function(a, b) { viewsignals.trigger(); alert('completed');}");

QJSValue fun = myEngine.evaluate("(function(a, b) { viewsignals.trigger(); alert('completed');}");

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However, when executed, alert does not show up.
What am I doing wrong here?
Thanks