I have a client-side script in which I initiate some SSJS to collect string values that reside in a strings.properties file:

function confirmBeforeDelete(){
    var msgEmptySelection = "#{javascript:strings['empty']}";
    var msgConfirm = "#{javascript:strings['confirm']}";

    if(!XSP.isViewPanelRowSelected("#{id:vwPnlDefault}", "col1")) {
        !XSP.alert(msgEmptySelection);
        return false;
    }

    if(!XSP.confirm(msgConfirm)) {return false;}    
}

This works fine.

But when I store the script in a csjs library my text messages becomes: #{javascript:strings['empty']} and #{javascript:strings['confirm']}.

What am I doing wrong?