Extending Error in Javascript with ES6 syntax & Babel

Question

I am trying to extend Error with ES6 and Babel. It isn\'t working out.

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

var error = new          


        

Answer 1

Quoting

class MyError extends Error {
  constructor(message) {
    super(message);
    this.message = message;
    this.name = 'MyError';
  }
}

There is no need for this.stack = (new Error()).stack; trick thanks to super() call.

Although the above codes cannot output the stack trace unless this.stack = (new Error()).stack; or Error.captureStackTrace(this, this.constructor.name); is invoked in Babel. IMO, it maybe one issue in here.

Actually, the stack trace can be output under Chrome console and Node.js v4.2.1 with this code snippets.

class MyError extends Error{
        constructor(msg) {
                super(msg);
                this.message = msg;
                this.name = 'MyError';
        }
};

var myerr = new MyError("test");
console.log(myerr.stack);
console.log(myerr);

Output of Chrome console.

MyError: test
    at MyError (:3:28)
    at :12:19
    at Object.InjectedScript._evaluateOn (:875:140)
    at Object.InjectedScript._evaluateAndWrap (:808:34)
    at Object.InjectedScript.evaluate (:664:21)

Output of Node.js

MyError: test
    at MyError (/home/bsadmin/test/test.js:5:8)
    at Object. (/home/bsadmin/test/test.js:11:13)
    at Module._compile (module.js:435:26)
    at Object.Module._extensions..js (module.js:442:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:311:12)
    at Function.Module.runMain (module.js:467:10)
    at startup (node.js:134:18)
    at node.js:961:3