node.js 模块路径
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node.js modules path
提问by Mario
I realised that when I did a global installation of a node.js module (with the -g flag) node couldn't use that module unless I wrote the entire path.
我意识到，当我对 node.js 模块（带有 -g 标志）进行全局安装时，除非我写了整个路径，否则节点无法使用该模块。
I mean, this doesn't work if the module has been globally installed:
我的意思是，如果模块已全局安装，这将不起作用：
cheerio = require('cheerio'),
I have to write that:
我必须这样写：
cheerio = require('/usr/lib/node_modules/cheerio'),
How can I say to node that it has to look for the modules in the right path?
我怎么能告诉节点它必须在正确的路径中寻找模块？
Thank you.
谢谢你。
回答by inki
In general, I would suggest letting npm give you the path and set that as mentioned above:
一般来说，我建议让 npm 为您提供路径并按照上述方式进行设置：
$ echo 'export NODE_PATH="'$(npm root -g)'"' >> ~/.bash_profile && . ~/.bash_profile
回答by Vikram Tiwari
For those in Windows platform add this to your PATH in system variables:
对于 Windows 平台上的用户，将其添加到系统变量中的 PATH 中：
C:\Users\<username>\AppData\Roaming\npm
PS: Tested on Windows 8.1
PS：在 Windows 8.1 上测试
回答by Errol Fitzgerald
You can add the following to ~/.bash_profile:
您可以将以下内容添加到 ~/.bash_profile：
export NODE_PATH=/usr/lib/node_modules:$NODE_PATH
回答by Daniel Gerber
For people with ZSH installed:
对于安装了 ZSH 的人：
echo 'export NODE_PATH="'$(npm root -g)'"' >> ~/.zshrc && . ~/.zshrc
echo 'export NODE_PATH="'$(npm root -g)'"' >> ~/.zshrc && . ~/.zshrc
回答by allen yang
The better way is to set the modules path in your js file.
更好的方法是在 js 文件中设置模块路径。
In my case, i ran npm install mysqlat /usr/etc, mysql will shown in "/usr/etc/node_modules", so this is the right path:
就我而言，我npm install mysql在 /usr/etc 运行，mysql 将显示在“/usr/etc/node_modules”中，所以这是正确的路径：
var mysql = require('/usr/etc/node_modules/mysql');
