Install npm and cnpm (Windows) Install npm and cnpm (Windows)

Install npm and cnpm (Windows)

【Tools official website】

【installation steps】

1. Install node.js

1. Go to the node.js official website to download and install the tool, where the installation path is selected to the D drive, D:\Program Files\nodejs

After the installation is complete, enter the following command on the command line to test whether the installation is successful, and the version number will appear correctly

 
          npm -v

2. Change the original environment variables,

(1) We need to configure the storage path of the global module of npm and the path of the cache. For example, if I want to put the above two folders in the main directory of NodeJS, I will create two "node_global" and "node_cache" under NodeJs. folder, enter the following command to change the npm configuration

 
          npm config  
          set  
          prefix  
          "C:\Program Files\nodejs\node_global" 
         
          npm config  
          set  
          cache  
          "C:\Program Files\nodejs\node_cache"

(2) Add the system variable NODE_PATH to the system environment variable, enter the path D:\Program Files\nodejs\node_global\node_modules, and the modules installed after that will be installed in the changed path

(3) Enter the following command on the command line to try to install express (Note: the parameter "-g" means to install it in the global directory, that is, in the "D:\Program Files\nodejs\node_global" set above.)

 
          npm install express -g

After installation, you can see that .\node_global\node_modules\express already has content

(4) Enter node on the command line to enter the editing mode, and enter the following code to test whether the module can be loaded normally:

 
          require( 
          'express' 
          )

Assuming success, you can see output. Assuming an error, check the path in NODE_PATH.

2. Install Taobao npm (cnpm)

1. Install cnpm

(1) Enter the following command

 
          npm install -g cnpm --registry=https: 
          //registry.npm.taobao.org

(2) Whether the input of cnpm -v is normal, there will definitely be an error here.

 
          cnpm -v

(3) Add the content of the system variable path

　　Because cnpm will be installed under D:\Program Files\nodejs\node_global, and the system variable path does not contain this path. Add this path under the system variable path to use cnpm normally.

Reference article: [NetEase Blog] NodeJS, NPM installation and configuration steps (windows version)