This is very common error when your project has ES6 modules as well as require.js module systems. Here, I will show you few examples on how to require ES6 modules inside an AMD module. It will help you mitigate such errors.
default export
// Employee.js
function Employee () {
...
}
export default new Employee();
// HR.js
var Employee = require('Employee').default;
named export
// Employee.js
function Employee () {
...
}
export const employee = new Employee();
// HR.js
var Employee = require('Employee').employee;
