CustomError

CustomError.js

// replace `CustomError` with the name of your error
// replace `ParentError` with the superclass, even if it is `Error` or another native error.
// other arguments besides `message` can be added, but at least `message` should exist.

var CustomError = (function (ParentError) {
  function CustomError(message) {
    var self = this instanceof CustomError ? this : Object.create(CustomError.prototype);
    var err = ParentError.call(self, message);
    self.message = message;
    if (typeof Error.captureStackTrace === 'function') {
      Error.captureStackTrace(self, CustomError);
    } else if ('stack' in err) {
      self.stack = err.stack;
    }
    return self;
  }
  CustomError.prototype = Object.create(ParentError.prototype);
  CustomError.prototype.constructor = CustomError;
  CustomError.prototype.name = 'CustomError';
  return CustomError;
}(ParentError));