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

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

Understanding NestJS CLI

NestJS is a progressive Node.js framework for building efficient, reliable, and scalable server-side applications. The NestJS CLI is a command-line interface tool that helps developers create and manage NestJS projects with ease. It provides commands for generating components, running applications, and more.

Identifying the Symptom

When working with NestJS, you might encounter the following error message: Error: Cannot find module '@nestjs/cli'. This error typically occurs when you attempt to use the NestJS CLI without having it properly installed.

Explaining the Issue

The error message indicates that the system is unable to locate the @nestjs/cli module. This usually happens because the CLI package is not installed in your project or globally on your system. Without this module, you cannot execute CLI commands necessary for managing your NestJS application.

Why This Happens

This issue arises when the @nestjs/cli package is missing from your node_modules directory, either because it was never installed or was accidentally removed.

Steps to Fix the Issue

To resolve this error, you need to ensure that the @nestjs/cli package is installed correctly. Follow these steps:

Step 1: Install the CLI Globally

Open your terminal and run the following command to install the NestJS CLI globally:

npm install -g @nestjs/cli

This command installs the CLI globally, making it accessible from any directory on your system.

Step 2: Verify the Installation

After installation, verify that the CLI is installed correctly by running:

nest --version

This command should output the version of the NestJS CLI, confirming that it is installed.

Step 3: Install Locally (Optional)

If you prefer to install the CLI locally within your project, navigate to your project directory and run:

npm install @nestjs/cli --save-dev

This installs the CLI as a development dependency in your project.

Additional Resources

For more information on using the NestJS CLI, visit the official NestJS CLI Documentation. If you encounter further issues, consider checking out the NestJS GitHub Issues page for community support.

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