Just testing out Error subclassing

error.js

'use strict';

class MyError extends Error {}

class MyVerboseError extends Error {
  constructor(message) {
    super(message);
    this.name = this.constructor.name; // ! important
    this.message = message;
    Error.captureStackTrace(this, this.name);
  }
}

try {
  throw new MyError('Simple error');
} catch (e) {
  console.log(e instanceof MyError); // true
  console.log(e instanceof Error);   // true
  console.log(e.message);            // "Simple error"
  console.log(e.stack);
}

try {
  throw new MyVerboseError('Verbose error');
} catch (e) {
  console.log(e instanceof MyVerboseError); // true
  console.log(e instanceof Error);          // true
  console.log(e.message);                   // "Verbose error"
  console.log(e.stack);
}

try {
  throw new Error('Standard error');
} catch (e) {
  console.log(e instanceof MyError);        // false
  console.log(e instanceof MyVerboseError); // false
  console.log(e instanceof Error);          // true
  console.log(e.message);                   // "Standard error"
  console.log(e.stack);
}