如何在特定目录中安装npm软件包

Question

要在当前目录中安装package.json的软件包，您需要运行npm install命令。

是否有可能安装软件包在特定的文件夹package.json，没有去到该文件夹​​`

的闺房，然后一饮而尽任务已经找到解决办法：

bower install --config.cwd=<directory> 
gulp build --cwd <directory> 

但缺少类似功能的npm

当我运行命令：npm install --prefix C:\Users\ng\Projects\Lottery\src\SPA 我看到一个错误：

npm ERR! addLocal Could not install C:\Users\ng\Projects 
npm ERR! Windows_NT 10.0.10586 
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "--prefix" "C:\\Users\\ng\\Projects\\Lottery\\src\\SPA" 
npm ERR! node v6.2.1 
npm ERR! npm v3.9.3 
npm ERR! code EISDIR 
npm ERR! errno -4068 
npm ERR! syscall read 

npm ERR! eisdir EISDIR: illegal operation on a directory, read 
npm ERR! eisdir This is most likely not a problem with npm itself 
npm ERR! eisdir and is related to npm not being able to find a package.json in 
npm ERR! eisdir a package you are trying to install. 

npm ERR! Please include the following file with any support request: 
npm ERR!  C:\Users\ng\Projects\npm-debug.log 

而且从documentation：

The prefix config defaults to the location where node is installed. On most systems, this is /usr/local. On windows, this is the exact location of the node.exe binary

Answer 1

这应该是解决方案：How to npm install to a specified directory?

基本上你正在使用的前缀选项与全局选项一起：npm install --prefix <path/to/prefix_folder> -g

你也可以有看看documentation。