How to install and configure npm

The installation and configuration of npm has the following steps: download and install nodejs, open cmd to check whether the installation is successful, npm environment configuration, check whether npm is configured successfully

npm installation and environment configuration

##[Recommended article: What are some useful tips and tricks in npm、What is npm】

(1) Download and install nodejs

Download address:

https://nodejs.org/en/

Just select next, the path D selected in this article :\nodejs folder

(2) Open CMD and check whether the path is normal

（ 3) After the installation is completed, test whether nodejs and npm are successfully installed.

Method: Enter node -v in cmd, npm -v will display the version prompt as shown below, which means the installation of NodeJS and npm is completed.

(4) npm configuration

Module path, cache path

First configure the storage path of npm’s global module And the cache path

Specific method: Create two folders "node_global" and "node_cache" under NodeJs. As shown below

Then run the following 2 commands

npm config set prefix "D:\nodejs\node_global"

npm config set cache "D:\nodejs\node_cache"

You can find that the directory path has changed

Enter the command npm config set registry=http://registry. npm.taobao.org Configure the mirror station

Enter the command npm config list to display all configuration information

Check whether the mirror station is OKCommand 1

npm config get registry

Check whether the mirror station is working. Command 2

Npm info vue See if you can get vue information

Note that at this time, the default module D:\nodejs\node_modules directory

will be changed to the D:\nodejs\node_global\node_modules directory,

If you run npm install and other commands directly, an error will be reported.

We need to do one thing: add the environment variable NODE_PATH. The content is: D:\nodejs\node_global\node_modules,

Add D:\nodejs\node_global

# to the path environment variable.

##1. Test NPM installation vue.js

Command: npm install vue -g

The -g here refers to installation to the global global directory

We can find that vue is found in the global directory

At this step our npm Installed and configured

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