Creating a custom exception using ECMAScript 6

ecm6_exception.js

class CustomException extends Error {
    constructor(message) {
        super(message);
        this.name = this.constructor.name;
        if ('function' === typeof Error.captureStackTrace) {
            Error.captureStackTrace(this, this.constructor);
        } else {
            this.stack = (new Error(message)).stack;
        }
    }
}