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Javascript NestJS Error: Cannot find module '@nestjs/terminus'

The '@nestjs/terminus' package is not installed or missing.

Understanding NestJS and Its Purpose

NestJS is a progressive Node.js framework for building efficient, reliable, and scalable server-side applications. It leverages TypeScript, combining elements of OOP (Object Oriented Programming), FP (Functional Programming), and FRP (Functional Reactive Programming). NestJS is built on top of Express.js, providing a robust set of features for developing backend applications.

Identifying the Symptom

When working with NestJS, you might encounter the error message: Error: Cannot find module '@nestjs/terminus'. This error typically occurs when you attempt to use the Terminus module, which is part of the NestJS ecosystem, but the module cannot be found in your project.

What You Observe

Upon running your NestJS application, the application fails to start, and the console outputs the error message indicating that the module '@nestjs/terminus' cannot be found.

Explaining the Issue

The error message Cannot find module '@nestjs/terminus' indicates that the Terminus module, which is used for health checks and readiness probes in NestJS applications, is not installed in your project. This module is essential for monitoring the health of your application and ensuring it is running optimally.

Why This Happens

This issue arises when the '@nestjs/terminus' package is not included in your project's node_modules directory, either because it was never installed or it was removed.

Steps to Fix the Issue

To resolve this issue, you need to install the '@nestjs/terminus' package in your project. Follow these steps:

Step 1: Install the Package

Open your terminal and navigate to the root directory of your NestJS project. Run the following command to install the '@nestjs/terminus' package:

npm install @nestjs/terminus

This command will download and install the package, adding it to your project's dependencies.

Step 2: Verify the Installation

After the installation is complete, verify that the package is listed in your package.json file under dependencies. You can also check the node_modules directory to ensure the package is present.

Step 3: Import and Use the Module

Once installed, you can import the Terminus module into your application module as follows:

import { TerminusModule } from '@nestjs/terminus';

@Module({
imports: [TerminusModule],
})
export class AppModule {}

For more detailed information on using the Terminus module, refer to the official NestJS documentation.

Conclusion

By following these steps, you should be able to resolve the Cannot find module '@nestjs/terminus' error and successfully integrate the Terminus module into your NestJS application. This will enable you to perform health checks and ensure your application is running smoothly.

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Javascript NestJS Error: Cannot find module '@nestjs/terminus'

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