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

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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

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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

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

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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  

# }; ?( O, X! X$ o! o3)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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8 F8 N. f9 g  G, Y5 U6 S, S& }C:\Users\admin>npm install express -g
* p8 ^! @; {# ?& f6 Znpm WARN notsup Unsupported engine for express@5.1.0: wanted: {"node":">= 18"} (current: {"node":"12.18.2","npm":"6.14.5"})
; @4 R) a$ T; b% Lnpm WARN notsup Not compatible with your version of node/npm: express@5.1.0
npm WARN notsup Unsupported engine for router@2.2.0: wanted: {"node":">= 18"} (current: {"node":"12.18.2","npm":"6.14.5"})
' K/ ~' t2 J! C/ X6 inpm WARN notsup Not compatible with your version of node/npm: router@2.2.0
- T8 s% h& [3 h+ e( cnpm 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
8 A- z, G4 J$ R6 M1 c5 Knpm 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
npm WARN notsup Unsupported engine for merge-descriptors@2.0.0: wanted: {"node":">=18"} (current: {"node":"12.18.2","npm":"6.14.5"})
0 g* B8 p6 x' A  r4 K: Mnpm 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
- T1 ~) t5 @1 q- ~$ k/ ?added 66 packages from 42 contributors in 18.426s

安装完成之后，既可以查到到nodejs目录下global目录有内容了。
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, o. w% u( j% S. o* ]> require('express')
Uncaught Error: Cannot find module 'express'
Require stack:
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* Z: _: G# K5 f9 ?6 W% l0 L    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:966:15)
( Z- [! i( }8 {0 K    at Function.Module._load (internal/modules/cjs/loader.js:842:27)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
3 x7 _7 d' Q( X7 K    at require (internal/modules/cjs/helpers.js:72:18) {
# G2 Y* S# m8 K" R; s, s  code: 'MODULE_NOT_FOUND',
  requireStack: [ '<repl>' ]
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1 `$ i6 i+ ?9 \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）
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4 m2 k( ~% X3 E8 A 1.安装cnpm
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   (1)输入以下命令
>npm install -g cnpm@4

% s7 X& c" S: B# y) N7 U配置cnpm的环境变量即可。