Error factory in ES6

typed-errors.js

const assert = require('assert');

function makeTypedError(args) {
    assert(args, 'TypedError: must specify options');
    assert(args.type, 'TypedError: must specify options.type');
    assert(args.message, 'TypedError: must specify options.message');
    assert(args.statusCode, 'TypedError: must specify options.statusCode');

    return (class extends Error {
        constructor(message) {
            super(message || args.message);

            Object.defineProperty(this, 'name', {enumerable: false, value: args.type});
            Object.defineProperty(this, 'type', {enumerable: false, value: args.type});
            Object.defineProperty(this, 'statusCode', {enumerable: false, value: args.statusCode});

        }
    })

}

module.exports = makeTypedError;