Custom Error

customError.js

function CustomError(message, name='CustomError', code=500) {
  const error = Error.call(this, message);

  this.name = name;
  this.code = code,
  this.message = error.message;
  this.stack = error.stack;
}

CustomError.prototype = Object.create(Error.prototype);
CustomError.prototype.constructor = CustomError;

const customError = new CustomError('some error message','cant-find-obj', 401);

console.log(customError.name + ' => cant-find-obj');
console.log(customError.message + ' => some error message');
console.log(customError.code + ' => 401');
console.log((customError instanceof Error) + ' => true');
console.log((customError instanceof CustomError) + ' => true');

console.log('constructor: ' + customError.constructor);
console.log('toString: ' + customError.toString());
console.log('stack: ' + customError.stack);

customNodeError.js

var util = require('util');

function MyError(message, code) {
  this.message = message;
  this.code = code;
  Error.captureStackTrace(this, MyError);
}

util.inherits(MyError, Error);

MyError.prototype.name = 'MyError';