{"SyntaxError: Expected an expression but found 'class' instead"}

[sepehrbg]

When i am trying to execute a file of javascript, i am getting following error as it is containing a class. for other files which only contains functions it is not giving any errors, only for the file with javascript class it is throwing exception.
here is the exception: {"SyntaxError: Expected an expression but found 'class' instead"}
and here is my code:

        var scriptEngine = new ScriptEngine();
        scriptEngine.EnableDebugging = true;
        string console = "";
       scriptEngine.ExecuteFile(@"SQLProJSQueryFormatter.js");

Anybody can help??

[eaglemc]

See https://github.com/paulbartrum/jurassic/blob/master/README.md
class is a part of ECMAScript 6 that isn't supported yet.
Your best bet is to transpile your script to ECMA 5.

[SebastianStehle]

Hi, do you have any experience with transpiling? I tried to get this project working in jurassic: https://github.com/jpknoll/mjml-aspnetcore

It takes around 20ms to compile a small template and I thougt jurassic might be faster than a node service, but Just failed to get it transpile. Babel just doe not convert arrow functions.

[eaglemc]

Not exactly. I've only done stuff with compiling TypeScript.
The TypeScript compiler can handle arrow functions, but I'm not sure what it does if you give it a .js file instead of a .ts file as the input. However there is an --allowJs flag to let you do this, so maybe it would work?