onesignal-web-sdk/src/errors/AlreadySubscribedError.ts

Web push notifications from OneSignal.

import OneSignalError from './OneSignalError';


export default class AlreadySubscribedError extends OneSignalError {
  constructor() {
    super('This operation can only be performed when the user is not subscribed.');

    /**
     * Important! Required to make sure the correct error type is detected during instanceof checks.
     * Same applies to all derived classes.
     * https://github.com/Microsoft/TypeScript-wiki/blob/master/Breaking-Changes.md#extending-built-ins-like-error-array-and-map-may-no-longer-work
     */
    Object.setPrototypeOf(this, AlreadySubscribedError.prototype);
  }
}