How to npm config save into project .npmrc file?

When using npm (Node Package Manager) for project development, you may need to set specific configurations for a particular project. These configurations can be achieved by creating a .npmrc file located in the project's root directory. The .npmrc file allows you to specify npm configurations for this project without affecting global or user-level configurations.

Steps:

1. Open the command-line tool: First, open your command-line tool (such as Terminal, CMD, or PowerShell).

2. Navigate to the project directory: cd path/to/your/project

3. Create or edit the .npmrc file: If the .npmrc file already exists in the project root directory, you can directly edit it. If it does not exist, you can create a new file: touch .npmrc

4. Set configuration options: Open the .npmrc file with a text editor and set the required npm configurations. For example:

plaintext
registry=https://my.custom.registry/
save-exact=true

Specifically, registry specifies the npm registry URL for the project, and save-exact ensures that exact version numbers are written to package.json during dependency installation.

1. Save and close the file: After saving the .npmrc file, these configurations will only apply to the current project.

Example:

Suppose you are working in an enterprise environment where your company uses an internal npm registry instead of the public npm registry. In this case, you can configure the following in the project's .npmrc file:

plaintext
registry=http://npm.company.com
always-auth=true

With this configuration, whenever npm commands are executed for the project, npm will use the specified corporate registry and always require authentication.

Summary:

By creating or modifying the .npmrc file in the project root directory, you can easily set dedicated npm configurations for a specific project, which helps maintain consistency and security across different environments. This approach is particularly suitable for large or specialized project development where fine-grained control over npm behavior is required.