define a custom error in javascript

javascript error

// from: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error

function MyError(message) {
  this.name = 'MyError';
  this.message = message || 'Default Message';
}
MyError.prototype = Object.create(Error.prototype);
MyError.prototype.constructor = MyError;


/*
 * try {
 *  throw new MyError('custom message');
 * } 
 * catch (e) {
 *   console.log(e.name);     // 'MyError'
 *   console.log(e.message);  // 'custom message'
 * }
 */