Import Class from doesn't work

Hi guys I’m trying to export a class to a JS file but i riceve thi error:

[Viewport]: Error: SyntaxError: Unexpected token import: Uncaught SyntaxError: Unexpected token import in Fuse.Scripting.DiagnosticSubject<SpumoneInit.js:1>

MainView.ux

<App>
       <JavaScript File="SpumoneInit.js" />
</App>

SpumoneInit.js

import Spumone_Youtube_API from "Classes/SpumoneYoutube";
ytb = new Spumone_Youtube_API('ABC');
console.log(ytb.apiKey);

SpumoneYoutube.js

export default class Spumone_Youtube_API{
    constructor(apiKey){
        this.apiKey = apiKey;
    }
}

Hi Simone,

are you using the new FuseJS / Model approach? Which Fuse version are you on? What does your .unoproj file look like?