Python "if __main__" in Node.js and WSH JScript

is_main.js

/****************************************************************************
 \file      is_main.js
 \author    SENOO, Ken
 \copyright CC0
*****************************************************************************/

function is_main(this_file_name){
    return (typeof(module ) !== "undefined" && !module.parent    ) ||
      (typeof(WScript) !== "undefined" && WScript.ScriptName === this_file_name)
}

if (typeof(print) === "undefined"){  // for SpiderMonkey
  function print(text){
    if      (typeof(console) !== "undefined") console.log(text );
    else if (typeof(WScript) !== "undefined") WScript.Echo(text);
  }
}

if (is_main("is_main.js")){
  print("Hello");
}

is_sample_main.js

/// \file is_sample_main.js

if (WScript.ScriptName){
  WScript.Echo('Failure');
}

if (WScript.ScriptName === "is_sample_main.js"){
  WScript.Echo("Not shown");
}

is_sample_main.wsf

<?xml version="1.0" encoding="UTF-8"?>
<!-- \file is_sample_main.wsf -->
<package>
  <job>
    <script language="JScript" src="is_sample_main.js"></script>
 </job>
</package>