NPM (Node Package Manager) is the node.js Package Manager used for Node plug-in management (install, uninstall, manage dependencies, etc.).

CNPM, NPM image of Taobao source. Because the NPM installation plug-in is downloaded from a foreign server, which is affected by the network and prone to abnormalities, so the Taobao team made a complete image of nPMjs.org, which is synchronized with the official service frequency every 10 minutes. CNPM supports all NPM commands except publish, so you can safely use CNPM instead of NPM.

Install the NPM plug-in

npm install <name> [-g] [--save-dev]
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  • <name>: Indicates the name of a node plug-in
  • -g: Global installation
  • –save: will save topackage.json 中
  • –devTo keep:package.json 的 devDependenciesNode, not specified-devWill save to the dependent node

Note 1: The difference between a global installation and a non-global installation:

Global installation:

  • Installed in theC:\Users\Administrator\AppData\Roaming\npmdirectory
  • The system environment variable is written and can be invoked from anywhere on the command line

Non-global installation:

  • Will be installed in the current location directorynode_modulesfolder

Note 2: Why save to package.json

Because the node plug-in package is relatively large, instead of versioning it, write the configuration information to package.json and add it to versioning. Other developers can download it accordingly (NPM install at the command prompt will download all required packages according to package.json).

2. Uninstall the NPM plug-in

npm uninstall <name> [ -g ] [ --save-dev ]
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NPM update plugin

  1. Update a single plug-in
npm update <name> [ -g ] [ --save-dev ]
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  1. Update all plug-ins
npm update [ --save-dev ] 
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NPM Other commands

  1. Check that plug-ins are installed in the current directory 
    npm list
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  2. View the version of the current installation package 
    npm ls <name>
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  3. Changed the download image source 
    npm config setRegistry changes to https://registry.npm.taobao.org NPM mirror download for taobao imageCopy the code