---
title: "Register a Client"
url: https://docs.catalyst.zoho.com/en/sdk/javascript/v1/cloudscale/push-notifications/register-client/
description: "This page describes the method to register a client for push notifications using the Catalyst JavaScript SDK."
last_updated: 2026-09-09T10:45:38Z
service: CloudScale
type: general
related_links:
  - name: "Catalyst CloudScale"
    url: /en/cloud-scale/
  - name: "Push Notifications Help Documentation"
    url: /en/cloud-scale/help/push-notifications/introduction/
  - name: "Java SDK Documentation"
    url: /en/sdk/java/v1/cloud-scale/push-notifications/send-notifications/
  - name: "Python SDK Documentation"
    url: /en/sdk/python/v1/cloud-scale/push-notifications/get-component-instance/
  - name: "REST API Documentation"
    url: /en/api/code-reference/cloud-scale/push-notifications/web/send-web-push-notifications/#SendWebPushNotifications
repository:
  name: "Repository"
  url: https://github.com/catalystbyzoho/zcatalyst-sdk-js
---

# Register a Client

> **Note:** Ensure you have installed the [required package](https://docs.catalyst.zoho.com/en/sdk/javascript/v1/cloudscale/push-notifications/overview/#prerequisites) to use this SDK method.

You can register a client device or browser to receive push notifications using the `enableNotification()` SDK method. Once the client is registered, you can define a `messageHandler` on the component instance to handle incoming push notification messages.

The `pushNotification` instance used here is the [component instance](https://docs.catalyst.zoho.com/en/sdk/javascript/v1/cloudscale/push-notifications/get-instance/).

```javascript
// Register the client
const response = await pushNotification.enableNotification();

// Create a handler for the message when received
pushNotification.messageHandler = (msg) => {
  // Action to be performed when the message is received
};
```