05 (H5 *) node, altitude NRM

1: NPM

NPM stands Node Package Manager,

NodeJS is a package management and distribution tools.

2: NRM

nrm (npm registry manager) is a mirror image of npm source management tool, sometimes foreign resources too slow, you can use this to quickly switch between the source npm

registry: Registry; Registry; source address,

3: cnpm

Taobao mirror, every 10 minutes.

4: Homebrew referred to as BREW ,

Homebrew is the package management tool under Mac OS platform, it is easy to help us install, uninstall, update, view, search, and many other useful features. A simple instruction, the package management can be achieved, the Homebrew official website clearly describes the installation and use of basic

5: Details

5.1: asl

NPM allows users to download from the server written by someone else third-party packages to local use.
It allows users to download and install the command-line program written by someone else to use local NPM from the server.
It allows users to write their own bag or command line program uploaded to the server for others to use NPM

5.2: npm command

npm -v To test whether the successful installation
View the current directory of installed plug-ins:npm list
Update All plug-ins: npm update [ --save-dev ]
Use npm updates the corresponding plug-in: npm update <name> [ -g ] [ --save-dev]
Use npm uninstall the plug: npm uninstall <name> [ -g ] [ --save-dev ]

5.3：cnpm

Taobao national team to do a mirror, because npm servers located abroad may affect the installation. Taobao official synchronous mirroring and frequency of the current 10 minutes to ensure as far as possible synchronized with the official service.
Installation: Execute the command prompt
npm install cnpm -g --registry=https://registry.npm.taobao.org
cnpm -v To test whether the successful installation

By changing the address to use Taobao mirror

The default address is npmhttps://registry.npmjs.org/
It can be used npm config get registryto view npm warehouse address
Can be used npm config set registry https://registry.npm.taobao.orgto change the default download address, you can not reach the installation cnpmwill be able to adopt the purpose of Taobao mirror, then use the above command to see if get success.

5.4: NRM

nrmPackage installation command: npm i nrm -g
nrmBe able to manage with the available mirror mirror source address and source address currently used, but simply provides several url and allows us to easily switch between these addresses
nrm lsThat nrm list, all available view mirror, and can be switched. * Number indicates the address of the currently used npm, you can use the command nrm use taobaoor nrm use npmto switch between them.

nrm ls command

6： -g -S -D

-g: Global installation. Will be installed in C: \ Users \ Administrator \ AppData \ Roaming \ npm, and write system environment variables; non-global installation: positioning will be installed in the current directory; global installed through the command line anywhere to call it, will be installed locally node_modules locate files are installed in the directory folder, by requiring a call;
-S: That is npm install module_name --save, write package.jsonin dependencies , dependencies is the need to publish to a production environment, such jq, vue family bucket, ele-ui ui framework, etc. These items must be used to run when you need to put the plugdependencies
-D: That is npm install module_name --save-dev, write package.jsonin devDependencies, devDependencies which is used only for plug-in development environment, not for production environments. For example, some plug-babel compiled function, webpack packaged plug-ins that need time to develop, some plug-ins to run real packaged up and do not need.

Why do you want to save package.json as node_module package is too great. With a configuration file is saved, only the plug-in installation package corresponding to the configuration file, import demand