Creating an angularjs filter using ES6

angularjs.es6.filter.js

class MyFilter {
  
  static filter( value ){
    return value.toLowerCase();
  }
  
}

export default MyFilter.filter;

angularjs.es6.module.js

import filter from "./angularjs.es6.filter.js"

angular.module( "module", [] )
    .filter( "awesomeFilter", () => filter );