Does Illustrator support template literals?

Hi,

I have an illustrator file with all of my icons, and a script that generates all the png assets for me. I would like it to also generate Contents.json files for iOS integration. In order to do that, I would like to utilize a feature like template literals, but I can't get it to work. I have tried with both 'let' and 'const' but the values don't update in the template. Any help would be greatly appreciated.

function mkContents(txt)
{
    let name = 'back';
    let size = '24';

    var Path = app.activeDocument.path;
    var saveFile = File(Path + "/" + "Contents" + ".json");

    if(saveFile.exists)
        saveFile.remove();

    saveFile.encoding = "UTF8";
    saveFile.open('w');
    saveFile.writeln(txt);
    saveFile.close();
}

let template = '''{
  "images" : [
    {
      "filename" : "ic_${ name }-${ size }@1x.png",
      "idiom" : "universal",
      "scale" : "1x"
    },
    {
      "filename" : "ic_${ name }-${ size }@2x.png",
      "idiom" : "universal",
      "scale" : "2x"
    },
    {
      "filename" : "ic_${ name }-${ size }@3x.png",
      "idiom" : "universal",
      "scale" : "3x"
    }
  ],
  "info" : {
    "author" : "xcode",
    "version" : 1
  }
}''';

mkContents(template);