 package is a key element for integrating subscription-based real-time functionality into a Nest.js application, leveraging GraphQL. By implementing subscriptions, the application can push updates to clients in real-time, which is essential for features that require immediate data reflection, such as live chats or real-time feeds.

Incorporating this package into a project follows the best practice of enhancing user experience with dynamic content updates, without the need for manual refreshes. It's advisable to ensure that the use of subscriptions is optimized and does not strain the server with unnecessary loads, and proper authorization mechanisms are implemented to secure real-time data channels.

GraphQLModule.forRoot<ApolloDriverConfig>({
      installSubscriptionHandlers: true,
    }),

 activates WebSocket support in a NestJS application, which is essential for handling real-time bi-directional communication between the server and clients. This configuration step is critical when the application needs to utilize WebSockets for features such as live chat, real-time feeds, or push notifications.

It is considered good practice to encapsulate the WebSocket configuration within dedicated modules or providers, thus keeping the 

 clean and maintainable. Additionally, thorough testing of WebSocket handlers is recommended to ensure that they handle client communication effectively and securely.

type Subscription {
  songCreated: Song!
}

---
title: Pub sub functionality in GraphQL
privateVideoUrl: https://stream.mux.com/EgQuxhZ42qCNWwXzdjZmysyDawOY1iOQ01MQ00mrlY1IA.m3u8
isPublicLesson: true
---

### Step 1: Installing graphql subscriptions

The `graphql-subscriptions` package is a key element for integrating subscription-based real-time functionality into a Nest.js application, leveraging GraphQL. By implementing subscriptions, the application can push updates to clients in real-time, which is essential for features that require immediate data reflection, such as live chats or real-time feeds.

Incorporating this package into a project follows the best practice of enhancing user experience with dynamic content updates, without the need for manual refreshes. It's advisable to ensure that the use of subscriptions is optimized and does not strain the server with unnecessary loads, and proper authorization mechanisms are implemented to secure real-time data channels.

```bash
npm install graphql-subscriptions
```

```bash
GraphQLModule.forRoot<ApolloDriverConfig>({
      installSubscriptionHandlers: true,
    }),
```

Enabling `installSubscriptionHandlers` to `true` within the `AppModule` activates WebSocket support in a NestJS application, which is essential for handling real-time bi-directional communication between the server and clients. This configuration step is critical when the application needs to utilize WebSockets for features such as live chat, real-time feeds, or push notifications.

It is considered good practice to encapsulate the WebSocket configuration within dedicated modules or providers, thus keeping the `AppModule` clean and maintainable. Additionally, thorough testing of WebSocket handlers is recommended to ensure that they handle client communication effectively and securely.

Learn

The newline Guide to Building Your First GraphQL Server with Node and TypeScript

Teach

Amelia Wattenberger

Author of Fullstack D3

Community

Masterclasses

Tutorials

Fullstack React with TypeScript