在文件夹上执行npm install时，软件包安装在import { createAction, props } from '@ngrx/store';
import { AuthState } from './auth.state';
export const getAuthData = createAction('[Auth] Get authentication data');
export const authDataRetrieved = createAction('[Auth] Authentication data retrieved', props<{payload: Partial<AuthState>}>());
export const authDataNotRetrieved = createAction('[Auth] Authentication data not retrieved');
export const googleSignIn = createAction('[Auth] Google sign-in attempt start');
export const authError = createAction('[Auth] Authentication error occurred', props<{ errorMessage: string, errorCode: string }>());
上，而不是c:\Users\<user>\node-modules
我尝试更新npm config save = false，但这不能解决问题
.\<project folder>\node-modules在项目文件夹中执行npm install express时，我希望在项目文件夹中创建node-modules子文件夹，而express模块将安装在node-modules子文件夹中。但是，它是在C：\ Users \ danielk \ node-modules中创建的。
任何人都可以帮助解决什么问题以及如何解决吗？
答案 0 :(得分：0)
当您执行npm install时，npm实际上将软件包安装到您当前所在的“ npm project”中。请参见以下示例：
eric_@Eric-Dev-Laptop MINGW64 ~/Desktop/mixed/stackoverflow
$ npm init
This utility will walk you through creating a package.json file.
It only covers the most common items, and tries to guess sensible defaults.
See `npm help json` for definitive documentation on these fields
and exactly what they do.
Use `npm install <pkg>` afterwards to install a package and
save it as a dependency in the package.json file.
Press ^C at any time to quit.
package name: (stackoverflow)
[...Truncated...]
Is this OK? (yes)
eric_@Eric-Dev-Laptop MINGW64 ~/Desktop/mixed/stackoverflow
$ mkdir child
eric_@Eric-Dev-Laptop MINGW64 ~/Desktop/mixed/stackoverflow
$ cd child/
eric_@Eric-Dev-Laptop MINGW64 ~/Desktop/mixed/stackoverflow/child
$ npm install express
npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN stackoverflow@1.0.0 No description
npm WARN stackoverflow@1.0.0 No repository field.
+ express@4.17.1
added 50 packages from 37 contributors and audited 126 packages in 3.021s
found 0 vulnerabilities
eric_@Eric-Dev-Laptop MINGW64 ~/Desktop/mixed/stackoverflow/child
$ ls
eric_@Eric-Dev-Laptop MINGW64 ~/Desktop/mixed/stackoverflow/child
$ ls ..
child/ node_modules/ package.json package-lock.json
eric_@Eric-Dev-Laptop MINGW64 ~/Desktop/mixed/stackoverflow/child
$ ls ../node_modules/
accepts/ escape-html/ mime/ safer-buffer/
array-flatten/ etag/ mime-db/ send/
body-parser/ express/ mime-types/ serve-static/
bytes/ finalhandler/ ms/ setprototypeof/
content-disposition/ forwarded/ negotiator/ statuses/
content-type/ fresh/ on-finished/ toidentifier/
cookie/ http-errors/ parseurl/ type-is/
cookie-signature/ iconv-lite/ path-to-regexp/ unpipe/
debug/ inherits/ proxy-addr/ utils-merge/
depd/ ipaddr.js/ qs/ vary/
destroy/ media-typer/ range-parser/
ee-first/ merge-descriptors/ raw-body/
encodeurl/ methods/ safe-buffer/
发生的事情是，我制作了一个stackoverflow文件夹，并在其中使用npm init初始化了一个“ npm project”，然后将cd放入了child文件夹中。当我在内部进行npm install express时，express模块将无意中安装到stackoverflow/node_module。这样一来，当您制作程序时，例如myprogram，甚至当您位于其中的某个子文件夹（例如myprogram/lib/）中并执行npm install时，该模块仍将安装到myprogram中。
将此与您的案例进行比较，这可能是因为您的C：\ Users \ danielk \已经是一个npm项目，所以当您在C：\ Users \ danielk \ Documents \ udemy_nodejs \ FirstExpressApp中时，npm会认为您在C：\ Users \ danielk \项目，然后将express模块保存在那里。
关于C：\ Users \ danielk \为何成为npm项目的原因，是您之前在此处手动进行了npm init，还是在那里您执行了第一个npm install，而C：\ Users \创建danielk \ node_modules，将其标记为npm项目。
还有另一件事，即express不是“全局”安装的，您可以通过npm install express -g进行“ global”安装（尽管Express没用全局安装）。您的情况只是软件包“安装在主目录中”。