extendable-error-class

Usage

const ExtendableError = require('extendable-error-class');

class MyError extends ExtendableError {
    constructor(m) {
        super(m);
    }
}

Why

Because the following doesn't work as expected.

class MyError extends Error {
    constructor(m) {
        super(m);
    }
}

How

The workaround is based on babel-plugin-transform-builtin-extend and following code

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

See http://stackoverflow.com/questions/31089801/extending-error-in-javascript-with-es6-syntax