在新版nodejs已经集成了npm，所以npm也都安装好了。可以通过输入下面命令来测试是否成功安装
node -v
npm -v
如果安装成功，都会出现版本号
用npm -v测试，报错：
node:internal/modules/cjs/loader:936
throw err;
^
Error: Cannot find module 'D:lcbsoftware
odejs
ode_modules
pmin
pm-cli.js'
at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15)
at Function.Module._load (node:internal/modules/cjs/loader:778:27)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
at node:internal/main/run_main_module:17:47 {
code: 'MODULE_NOT_FOUND',
requireStack: []
}
node:internal/modules/cjs/loader:936
throw err;
^
Error: Cannot find module 'D:lcbsoftware
odejs
ode_modules
pmin
pm-cli.js'
[90m at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15)[39m
[90m at Function.Module._load (node:internal/modules/cjs/loader:778:27)[39m
[90m at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)[39m
[90m at node:internal/main/run_main_module:17:47[39m {
code: [32m'MODULE_NOT_FOUND'[39m,
requireStack: []
}
解决办法：
1.卸载重装
2.以管理员方式运行
配好npm之后，在项目中报错，
输入安装依赖命令
npm install
报错如下：
npm ERR! code EPERM
npm ERR! syscall open
npm ERR! path C:Program Files
odejs
ode_cache_cacache mpcc62b2b3
npm ERR! errno EPERM
npm ERR! FetchError: Invalid response body while trying to fetch https://registry.npmjs.org/@riophae%2fvue-treeselect: EPERM: operation not permitted, open 'C:Program Files
odejs
ode_ca
che_cacache mpcc62b2b3'
npm ERR! at C:Program Files
odejs
ode_modules
pm
ode_modulesminipass-fetchlibody.js:162:15
npm ERR! at async Arborist.[nodeFromEdge] (C:Program Files
odejs
ode_modules
pm
ode_modules@npmcliarboristlibarboristuild-ideal-tree.js:1061:19)
npm ERR! at async Arborist.[buildDepStep] (C:Program Files
odejs
ode_modules
pm
ode_modules@npmcliarboristlibarboristuild-ideal-tree.js:930:11)
npm ERR! at async Arborist.buildIdealTree (C:Program Files
odejs
ode_modules
pm
ode_modules@npmcliarboristlibarboristuild-ideal-tree.js:216:7)
npm ERR! at async Promise.all (index 1)
npm ERR! at async Arborist.reify (C:Program Files
odejs
ode_modules
pm
ode_modules@npmcliarboristlibarborist
eify.js:149:5)
npm ERR! at async Install.install (C:Program Files
odejs
ode_modules
pmlibinstall.js:170:5)
npm ERR! FetchError: Invalid response body while trying to fetch https://registry.npmjs.org/@riophae%2fvue-treeselect: EPERM: operation not permitted, open 'C:Program Files
odejs
ode_c
ache_cacache mpcc62b2b3'
npm ERR! at C:Program Files
odejs
ode_modules
pm
ode_modulesminipass-fetchlibody.js:162:15
npm ERR! at async Arborist.[nodeFromEdge] (C:Program Files
odejs
ode_modules
pm
ode_modules@npmcliarboristlibarboristuild-ideal-tree.js:1061:19)
npm ERR! at async Arborist.[buildDepStep] (C:Program Files
odejs
ode_modules
pm
ode_modules@npmcliarboristlibarboristuild-ideal-tree.js:930:11)
npm ERR! at async Arborist.buildIdealTree (C:Program Files
odejs
ode_modules
pm
ode_modules@npmcliarboristlibarboristuild-ideal-tree.js:216:7)
npm ERR! at async Promise.all (index 1)
npm ERR! at async Arborist.reify (C:Program Files
odejs
ode_modules
pm
ode_modules@npmcliarboristlibarborist
eify.js:149:5)
npm ERR! at async Install.install (C:Program Files
odejs
ode_modules
pmlibinstall.js:170:5) {
npm ERR! code: 'EPERM',
npm ERR! errno: 'EPERM',
npm ERR! syscall: 'open',
npm ERR! path: 'C:\Program Files
odejs
ode_cache_cacache\tmp\cc62b2b3’,
npm ERR! type: ‘system’,
npm ERR! requiredBy: ‘.’
npm ERR! }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It’s possible that the file was already in use (by a text editor or antivirus),
npm ERR! or that you lack permissions to access it.
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.
解决办法：
删除npmrc文件，需要注意的是：不是nodejs安装目录npm模块下的那个npmrc文件，而是在C:Users{账户}下的.npmrc文件.
继续安装依赖：
npm install
出现下面结果：
npm WARN ERESOLVE overriding peer dependency
npm WARN deprecated querystring@0.2.0: The querystring API is considered Legacy. new code should use the URLSearchParams API instead.
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated microargs@1.1.2: This project has been renamed to @pawelgalazka/cli-args. Install using @pawelgalazka/cli-args instead
npm WARN deprecated uuid@3.4.0: Please upgrade to version 7 or higher. Older versions may use Math.random() in certain circumstances, which is known to be problematic. See https://v8.de
v/blog/math-random for details.
npm WARN deprecated har-validator@5.1.5: this library is no longer supported
npm WARN deprecated microcli@1.3.3: This project has been renamed to @pawelgalazka/cli . Install using @pawelgalazka/cli instead
npm WARN deprecated svgo@1.3.2: This SVGO version is no longer supported. Upgrade to v2.x.x.
npm WARN deprecated @hapi/topo@3.1.6: This version has been deprecated and is no longer supported or maintained
npm WARN deprecated @hapi/hoek@8.5.1: This version has been deprecated and is no longer supported or maintained
npm WARN deprecated @hapi/bourne@1.3.2: This version has been deprecated and is no longer supported or maintained
npm WARN deprecated @hapi/address@2.1.4: Moved to 'npm install @sideway/address'
npm WARN deprecated @hapi/joi@15.1.1: Switch to 'npm install joi'
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated runjs@4.4.2: This project has been renamed to 'tasksfile'. Install using 'npm install tasksfile' instead.
npm WARN deprecated highlight.js@9.18.5: Support has ended for 9.x series. Upgrade to @latest
npm WARN deprecated babel-eslint@10.1.0: babel-eslint is now @babel/eslint-parser. This package will no longer receive updates.
npm WARN deprecated chokidar@2.1.8: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies.
npm WARN deprecated core-js@2.6.12: core-js@<3.4 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old
core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Please, upgrade your dependencies to the actual version of core-js.
npm WARN deprecated chokidar@2.1.8: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies.
npm WARN deprecated html-webpack-plugin@3.2.0: 3.x is no longer supported
npm WARN deprecated eslint-loader@2.2.1: This loader has been deprecated. Please use eslint-webpack-plugin
npm WARN deprecated html-webpack-plugin@3.2.0: 3.x is no longer supported
added 1568 packages, and audited 1569 packages in 3m
105 packages are looking for funding
run `npm fund` for details
37 vulnerabilities (23 moderate, 11 high, 3 critical)
To address issues that do not require attention, run:
npm audit fix
To address all issues possible (including breaking changes), run:
npm audit fix --force
Some issues need review, and may require choosing
a different dependency.
Run `npm audit` for details.
npm notice
npm notice New minor version of npm available! 8.1.2 -> 8.3.0
npm notice Changelog: https://github.com/npm/cli/releases/tag/v8.3.0
npm notice Run npm install -g npm@8.3.0 to update!
npm notice
原因：默认的安装源是国外网站，国内访问不了无法获取依赖包信息。
解决办法：添加
npm config set registry http://registry.npm.taobao.org/
其他常见命令：
# 查看自己的安装源
npm config get registry
# 更换npm源为国内淘宝镜像
npm config set registry http://registry.npm.taobao.org/
# 或者更换为国内npm官方镜像
npm config set registry http://registry.cnpmjs.org/
# 还原npm源
npm config set registry https://registry.npmjs.org/
继续执行：
npm install
结果如下：
up to date in 2s
105 packages are looking for funding
run `npm fund` for details
即安装完成。
npm启动项目命令
npm run dev