windows 下安装npm以及cnpm的过程

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windows 下安装npm以及cnpm的过程

安装步骤】

一、安装node.js

1.前往node.js官网下载并安装工具，这里安装路径选到c盘，c:\Program Files\nodejs

安装完毕在命令行输入以下命令测试是否安装成功，正确会出现版本号

C:\Users\admin>npm -v

6.14.5

2.改变原有的环境变量，

  (1)我们要先配置npm的全局模块的存放路径以及cache的路径，例如我希望将以上两个文件夹放在NodeJS的主目录下，便在NodeJs下建立"global"及"cache"两个文件夹，输入以下命令改变npm配置

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C:\Users\admin>npm config set prefix "c:\Program Files\nodejs\global"

C:\Users\admin>npm config set cache "c:\Program Files\nodejs\cache"

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(2)在系统环境变量添加系统变量NODE_PATH，输入路径D:\Program Files\nodejs\global\node_modules，此后所安装的模块都会安装到改路径下  
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3)在命令行输入以下命令试着安装express（注：“-g”这个参数意思是装到global目录下，也就是上面说设置的“D:\Program Files\nodejs\global”里面。）
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/ D' f% Z% i/ ]; q5 l( f" Z) nC:\Users\admin>npm install express -g
% _; T6 B7 z( z) _" q+ d1 Enpm WARN notsup Unsupported engine for express@5.1.0: wanted: {"node":">= 18"} (current: {"node":"12.18.2","npm":"6.14.5"})
4 z! h$ O& x3 p2 A4 znpm WARN notsup Not compatible with your version of node/npm: express@5.1.0
8 t: l% H( J$ ]& R- unpm WARN notsup Unsupported engine for router@2.2.0: wanted: {"node":">= 18"} (current: {"node":"12.18.2","npm":"6.14.5"})
8 J2 C/ a, |. E: i: {npm WARN notsup Not compatible with your version of node/npm: router@2.2.0
npm WARN notsup Unsupported engine for send@1.2.0: wanted: {"node":">= 18"} (current: {"node":"12.18.2","npm":"6.14.5"})npm WARN notsup Not compatible with your version of node/npm: send@1.2.0
npm WARN notsup Unsupported engine for body-parser@2.2.0: wanted: {"node":">=18"} (current: {"node":"12.18.2","npm":"6.14.5"})
npm WARN notsup Not compatible with your version of node/npm: body-parser@2.2.0
npm WARN notsup Unsupported engine for serve-static@2.2.0: wanted: {"node":">= 18"} (current: {"node":"12.18.2","npm":"6.14.5"})
npm WARN notsup Not compatible with your version of node/npm: serve-static@2.2.0
) k7 [$ \4 \8 Q: B, g; z. p6 K, Lnpm WARN notsup Unsupported engine for merge-descriptors@2.0.0: wanted: {"node":">=18"} (current: {"node":"12.18.2","npm":"6.14.5"})
7 K: I1 }0 m# E- d/ wnpm WARN notsup Not compatible with your version of node/npm: merge-descriptors@2.0.0
npm WARN notsup Unsupported engine for path-to-regexp@8.2.0: wanted: {"node":">=16"} (current: {"node":"12.18.2","npm":"6.14.5"})
npm WARN notsup Not compatible with your version of node/npm: path-to-regexp@8.2.0

+ express@5.1.0
( D5 J* U2 _! k0 Xadded 66 packages from 42 contributors in 18.426s
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! S/ f9 _" K) t" [, b. Z3 q安装完成之后，既可以查到到nodejs目录下global目录有内容了。

" M$ \' a2 n% x# u> require('express')
1 o3 |5 r, d' A' g' kUncaught Error: Cannot find module 'express'
Require stack:
, Q* N4 ^/ U( Y  x+ i  t- <repl>
' r" C" R6 Q- y9 n, u- d# k    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:966:15)
, f3 W+ s+ d+ A6 T" [3 Q    at Function.Module._load (internal/modules/cjs/loader.js:842:27)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
0 w! D+ c% e) q. `$ d& g$ [4 D    at require (internal/modules/cjs/helpers.js:72:18) {
3 W/ n! l& l& h: G0 F9 X  code: 'MODULE_NOT_FOUND',
  requireStack: [ '<repl>' ]
}

2 R) j; }6 j) o& a/ A假设成功，可以看到有输出。假设出错，检查NODE_PATH的路径。

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admin

二、安装淘宝npm（cnpm）

1.安装cnpm

   (1)输入以下命令
>npm install -g cnpm@4

配置cnpm的环境变量即可。