How to check if the * .js file is JScript or JavaScript?

Question

I want to use *.js file both: on local web page on my pc (as JavaScript) and as WSH JScript when I double click *.js file. Is it possible to write a code running on both platforms?

How to check is running JS file is JavaScript or Microsoft JScript?

I tried this, but it doesn't work:

if (typeof(document) == "undefined")
    alert('WSH Script!');
    WScript.Quit;
}
else {
    document.writeln('Hello world');
}

Answer 1

1. You can check if WScript object exists e.g

   if (typeof WScript === 'object')

2. Quit is a function so you should call it, e.g

   WScript.Quit();

Answer 2

I'm posting the right code (thanks to Sergii Vorobei):

if (typeof WScript === 'object') {
    WSHshell= WScript.CreateObject("WScript.Shell")
    WSHshell.Popup("WSH Script!")
    WScript.Quit();
}
else {
    document.writeln('Hello world');
}

Answer 3

another nice trick using "conditional compilation":

if (/*@cc_on !@*/0) {
    WScript.StdOut.WriteLine("Hello from JScript");
} else {
    console.log('Hello from NodeJS');
}

more info here.