Custom Error using ES6 Javascript

CustomError.js

class CustomError extends Error {
     //Extend the super class, in this case the standard Error object 
     constructor(message){
        super(message);
        this.name = this.constructor.name;
    }
}

module.exports = CustomError;

UseError.js

//Include the custom error using require
const CustomError = require('./CustomError');

class UseError {
      constructor(obj){
        if (!obj.hasOwnProperty('name')){
            //Throw the error like you would normally
            throw new CustomError("A name is required");
        } else if (typeof obj.name != "string"){
            throw new CustomError("The name must be a string");
        } else {
            this.name = obj.name;
        }
      }
}

module.exports = UseError;