---
title: "Migrate to Modular JavaScript SDK"
url: https://docs.catalyst.zoho.com/en/sdk/javascript/v1/migration/
description: "Catalyst offers you JavaScript SDK in a modular architecture, providing you with a singular SDK for browser and server operations."
last_updated: 2026-09-09T10:45:38Z
service: All Services
type: general
related_links:
  - name: "Java SDK"
    url: /en/sdk/java/v1/overview/
  - name: "Python SDK"
    url: /en/sdk/python/v1/overview/
  - name: "iOS SDK"
    url: /en/sdk/ios/v2/overview/
  - name: "Android SDK"
    url: /en/sdk/android/v2/overview/
  - name: "Flutter SDK"
    url: /en/sdk/flutter/v2/overview/
  - name: "REST APIs"
    url: /en/api/code-reference/general/projects/create-new-project/#CreateNewProject
  - name: "Catalyst Functions"
    url: /en/serverless/help/functions/introduction
repository:
  name: "Repository"
  url: https://github.com/catalystbyzoho/zcatalyst-sdk-js
---

# Migrate to Modular JavaScript SDK

When you migrate your codebase to the Modular JavaScript SDK, you need to ensure the following steps are performed without fail:

* Appropriate package import
* Package initialization
* Component initialization

Consider the following example illustrating the changes you need to be more cautious about:

**Monolithic SDK**

```javascript
const catalyst = require('zcatalyst-sdk-node'); //import SDK
const app = catalyst.initialize(req);//package initialization
const stratus = app.stratus();// component initialization
```

**JavaScript Modular SDK**

```javascript
const { Stratus } = require('@zcatalyst/stratus'); //import package
const auth = await new ZCAuth().init(req); // package initialization
const stratus = new Stratus(); // component initialization

```