我现在正在Windows上学习nodejs。有几个模块是通过npm全局安装的。nodejs无法找到已安装的模块。以玉为例，
npm install jade -g
Jade安装在“C:\Program Files (x86)\nodejs\node_modules”目录下，但下面的代码将失败，并提示“无法找到模块' Jade '”错误。
var jade = require('jade');
然而，当jade在本地安装时(npm中没有-g选项)，代码将成功运行。我不想使用本地安装的模块，这对我来说是浪费磁盘空间。如何使全局安装的模块在Windows上工作?
当前回答
我将引用这个节点的博客文章…
In general, the rule of thumb is: If you’re installing something that you want to use in your program, using require('whatever'), then install it locally, at the root of your project. If you’re installing something that you want to use in your shell, on the command line or something, install it globally, so that its binaries end up in your PATH environment variable. ... Of course, there are some cases where you want to do both. Coffee-script and Express both are good examples of apps that have a command line interface, as well as a library. In those cases, you can do one of the following: Install it in both places. Seriously, are you that short on disk space? It’s fine, really. They’re tiny JavaScript programs. Install it globally, and then npm link coffee-script or npm link express (if you’re on a platform that supports symbolic links.) Then you only need to update the global copy to update all the symlinks as well.
其他回答
对于Windows 10，我必须在本地安装gulp文件夹:
C:\Users\myaccount\AppData\Roaming\npm\ node_modules
npm install gulp
这修复了我的“吞咽不被识别”的问题
或者，您可以添加到~/。NPMRC右前缀。我有C:\Program Files\nodejs的64 Win7。
只需从这里下载并重新安装节点，这将修复所有路径问题。
不要忘记重新启动命令提示符或终端。
我必须添加以下路径变量下的系统变量。在用户变量下设置变量不适合我。我用的是windows 11。
%USERPROFILE%\AppData\Roaming\npm
尝试添加/编辑环境变量，得出结论:
Edit/add User variables (of the upper box) instead of System variables (of the lower part); otherwise you have to "run as administrator" to get it work. Append ;%AppData%\npm to Path in order to use it as a command line tool (if supported, like jshint and grunt-cli). Create NODE_PATH and set it %AppData%\npm\node_modules in order to require('<pkg_name>') in scripts without install it in the project directory. (But npm link is suggested for this requirement if you're working on OS with mklink such as Vista and newer.)
测试环境:
赢7 (Ent。， 64位，SP1)， Node.js 4.2.4, npm 2.14.12 win8.1 (Ent。， 64位)，Node.js 0.10.30, npm 1.4.21
