Error on npm run production on shapecss

I am have error on npm run production, and its killing me 😦

/js/shapecss.js from UglifyJs Unexpected token: name (Accordion) [./~/shapecss/resources/assets/js/component/Accordion.js:1,0][/js/shapecss.js:19054,6]

I am using shapecss developed in laravel mix.

here is code is look like,

'use strict';

import {Accordion} from "./component/Accordion";
import {Modal} from "./component/Modal";
import {getTab} from "./component/Tab";
import {Nav} from "./component/Nav";
import {Circle} from "./component/shapes/Circle";
import {Parallelogram} from "./component/shapes/Parallelogram";
import {Rectangle} from "./component/shapes/Rectangle";
import {Square} from "./component/shapes/Square";


window.onload = function () {
  new Accordion();
  new Modal();
  getTab();
  new Nav();
  new Circle();
  new Parallelogram();
  new Rectangle();
  new Square();
}

Accordion class is look like,

export class Accordion{
        constructor(){
            this.accordionDivs = document.getElementsByClassName('accordion');
            if(this.accordionDivs)
            this.processAccordions();
        }
processAccordions() {
...
}

for detail please check,

Accordion class

and entry file,

[TheLarkInn]

This is not working be ause the es6 version of uglify has not landed yet, you will need to transpiled the js used to es5 before uglify can support it

[JeffreyWay]

Mix’s webpack config file doesn’t run Babel on any files in your node_modules directory, so that’s likely the issue.