What is npm in Node.js? How to use npm in node.js

The content of this article is about what is npm in Node.js? The usage of npm in node.js has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

1. What is npm

(1) Node Package Manager means Node package management tool/Node module management tool

(2) Common usage scenarios:

a. Allow users to download third-party packages written by others from the NPM server to the local;

b. Allow users to download and install others from the NPM server Write command line programs locally;

c. Allow users to upload their own packages or command line programs to the NPM server for others to use;

Official website: https://www.npmjs .com.cn/

Package quality comparison: https://npms.io/

2. Common npm operations

(1) Install module (local installation)

                                                                                                                                                                                                                                                                                        # npm install package name@major version number.*.*

npm install package name@major version number.This version number.*

localhost:NPM usage shiguang$ npm install jquery@1.12.4

localhost: The use of NPM shiguang$ npm install jquery@2.*.*

localhost: The use of NPM shiguang$ npm install jquery@2.1.*

(3) View installed packages

npm list View all installed package version numbers

npm list package name View specific package version number

(4) Delete module

NPM UninStall Packna Name

(5) Update Module

## NPM Update Packing

NPM Update Update all

(6) Search Module Search Module

NPM Search Packpace name

(7) View package information

NPM info package name

3 3.NPM global installation ( Command line operation)

(1) Command

Global installation: npm install package name -g or npm install -g package name

• Global deletion: npm uninstall package name -g

• View all installed packages: npm list -g
  (2) View the global directory
• npm config get prefix
  (3) Modify the global installation path

npm config set prefix new directory

4. Use Taobao npm image

by using Taobao’s customized cnpm (gzip compression support) command line tool instead Default npm:

npm install -g cnpm --registry=https://registry.npm.taobao.orgUse the command cnpm to operate. The usage is the same as npm

Related recommendations:

How to create Http service in Node.js? (Attached code)

Introduction to the Node.js module system and how to load modules

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