var JSON5 = loadHTMLscript('JSON5', "https://unpkg.com/json5@^2.2.0/dist/index.min.js");
if (JSON5 == undefined || !'stringify' in JSON5) {
  WSH.Echo("JSON5 not loaded, increase sleep.");
  WSH.Quit();
};

var obj = {
    "objName": {
        "item1": "value 1",
        "item2": "value 2"
    }
};

WSH.Echo("obj: " + JSON5.stringify(obj));
// output: obj: {objName:{item1:'value 1',item2:'value 2'}}

function loadHTMLscript(name, url, sleep) {
  var document = WSH.CreateObject('htmlfile');
  document.write('<meta http-equiv="x-ua-compatible" content="IE=Edge" /><script src="' + url + '"></script>');
  WSH.Sleep(sleep || 500);
  document.close();
  return document.parentWindow[name];
}