ES6 Class and equivalent ES5 code

angular2Class.js

// ES6 Class
class MyClass {
  constructor() {
    this.a = "b";
  }
  getA() {
    return this.a;
  }
}

// ES5 Equivalent
function MyClass() {
  this.a = "b";
}
MyClass.prototype.getA = function() {
  return this.a;
};