IE11 gives SCRIPT1002 error when defining class in javascript

Question

I have some trouble with IE11 and a static javascript class I wrote.

The error I get is:

SCRIPT1002: Syntax error rgmui.box.js (6,1)

Answer 1

@Mikey is right. IE11 does not recognize this syntax for classes because ES6 spec: https://kangax.github.io/compat-table/es6/

class RgMuiBox {
    static method1() {
    // .. code ..
    }
}

I'm still not sure if the following is the correct way to define a static class but it works:

var RgMuiBox = {};
  RgMuiBox.method = function() {
    // ....
  }

Just putting it out here so this question has some sort of an answer that might help people get going. If there are alternatives to the above I like to hear about those!