Perhaps something like this?

function OnPrinterStateChanged(state) {

    var evt = new CustomEvent('printerstatechanged', { detail: state });



    window.dispatchEvent(evt);

}





//Listen to your custom event

window.addEventListener('printerstatechanged', function (e) {

    console.log('printer state changed', e.detail);

});

An alternative solution would be to use function composition, but then it would be hard to remove specific listeners.

function OnPrinterStateChanged(state) {}



function compose(fn1, fn2) {

    return function () {

        fn1.apply(this, arguments);

        fn2.apply(this, arguments);

    };

}



//Add a new listener

OnPrinterStateChanged = compose(OnPrinterStateChanged, function (state) {

    console.log('listener 1');

});



//Add another one

OnPrinterStateChanged = compose(OnPrinterStateChanged, function (state) {

     console.log('listener 2');

});

EDIT:

Here's how you can do it with jQuery.

function OnPrinterStateChanged(state) {

    var evt = $.Event('printerstatechanged');

    evt.state = state;



    $(window).trigger(evt);

}





//Listen to your custom event

$(window).on('printerstatechanged', function (e) {

    console.log('printer state changed', e.state);

});