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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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" * R" W9 R! Q% h. n. k3 H9 o
C:\Users\admin>npm config set cache "c:\Program Files\nodejs\cache" " V" Y1 D$ W; f8 P- a
, o$ U4 \1 ~! h0 J& u* W6 \(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。） s5 h, ~+ G ] X z
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* a5 B) z) l: ^0 i9 P2 ^) y6 JC:\Users\admin>npm install express -g: _% ]1 F2 N9 P. L) ~
npm WARN notsup Unsupported engine for express@5.1.0: wanted: {"node":">= 18"} (current: {"node":"12.18.2","npm":"6.14.5"})7 M# _: \" K+ S3 J. m3 D
npm WARN notsup Not compatible with your version of node/npm: express@5.1.0" X: |; V# d) r) b' K) M
npm WARN notsup Unsupported engine for router@2.2.0: wanted: {"node":">= 18"} (current: {"node":"12.18.2","npm":"6.14.5"})
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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. g& A; R$ _7 W0 J1 }8 v
npm WARN notsup Unsupported engine for body-parser@2.2.0: wanted: {"node":">=18"} (current: {"node":"12.18.2","npm":"6.14.5"}): j1 }5 Y8 E. i) q }
npm WARN notsup Not compatible with your version of node/npm: body-parser@2.2.08 s% ~* i( S, c( w! P+ x
npm WARN notsup Unsupported engine for serve-static@2.2.0: wanted: {"node":">= 18"} (current: {"node":"12.18.2","npm":"6.14.5"})
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npm WARN notsup Unsupported engine for merge-descriptors@2.0.0: wanted: {"node":">=18"} (current: {"node":"12.18.2","npm":"6.14.5"})* b( v: \/ Y5 `* P& H! W9 E
npm WARN notsup Not compatible with your version of node/npm: merge-descriptors@2.0.0! B8 Y* J7 O3 v8 W3 u
npm WARN notsup Unsupported engine for path-to-regexp@8.2.0: wanted: {"node":">=16"} (current: {"node":"12.18.2","npm":"6.14.5"})
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+ express@5.1.0
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5 q% x/ ?: D0 W9 g' I; I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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3 }' Y+ r3 ^' l6 ~: v( r6 Y; M& ~, ]> require('express')
d" ^4 E! a; k/ B) M0 z0 v$ zUncaught Error: Cannot find module 'express'
1 X& |; }5 A. O- P1 m, eRequire stack:
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& U; j; S" O. p) M# @& L at Function.Module._resolveFilename (internal/modules/cjs/loader.js:966:15)
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3 t) W; {" R3 |" L4 D; P at Module.require (internal/modules/cjs/loader.js:1026:19)
9 g% d, X. b, D5 s0 d; \ at require (internal/modules/cjs/helpers.js:72:18) {0 D# b: ]" O2 a* N0 V
code: 'MODULE_NOT_FOUND',
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}
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1 z7 h4 {: o# |$ \7 V ?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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发表于 2025-5-28 11:02:16