node.js 如何判断 npm 包是全局安装还是本地安装
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How to tell if npm package was installed globally or locally
提问by AndraeRay
I am installing grunt, node, npm, bower, and grunt-cli on windows7.
我正在 windows7 上安装 grunt、node、npm、bower 和 grunt-cli。
The instructions say i should run the install commands with -g flag for global.
说明说我应该使用 -g 标志为全局运行安装命令。
How can I check if I used the -g flag when i installed. It will take a lot of time to uninstall them and reinstall.
如何检查我在安装时是否使用了 -g 标志。卸载它们并重新安装需要很多时间。
回答by Muntaser Ahmed
Use the listcommand with the -gflag to see all packages that are installed globally:
使用list带有-g标志的命令查看全局安装的所有软件包：
npm list -g
npm list -g
To check if a specific package is installed globally, you can provide the name of package (gruntin this case) as seen below:
要检查是否全局安装了特定包，您可以提供包的名称（grunt在这种情况下），如下所示：
npm list -g grunt
npm list -g grunt
Or you can use grepto filter on package names:
或者您可以使用grep过滤包名称：
npm list -g | grep grunt
npm list -g | grep grunt
Source: https://docs.npmjs.com/cli/ls
回答by Flimm
npm list --depth 1 --global packagename > /dev/null 2>&1
You can then check the exit status to see if it's installed or not. Thanks Adam Monsen.
然后，您可以检查退出状态以查看它是否已安装。谢谢亚当蒙森。
回答by mvermand
To check if a specific package is installed globally execute:
要检查是否全局安装了特定包，请执行：
npm list -g [package-name]
Let's take "grunt" as an example. If it is installed globally, you should see something like this
我们以“咕噜”为例。如果它是全局安装的，您应该会看到类似这样的内容
C:\data\tryout\test1>npm list -g grunt
C:\Users\xxxxxxx\AppData\Roaming\npm
└── [email protected]
If it is not installed globally, you should see something like this
如果没有全局安装，你应该看到这样的
C:\data\tryout\test1>npm list -g grunt
C:\Users\xxxxxxx\AppData\Roaming\npm
└── (empty)
To check if a specific package is installed locally you can execute the same commands as above but without the -g parameter.
要检查本地是否安装了特定软件包，您可以执行与上述相同的命令，但不带 -g 参数。
source: How to check if npm package was installed globally or locally.
回答by Mwiza
You can list all global packages with the command:
您可以使用以下命令列出所有全局包：
npm ls -g
Or check for a specific package with:
或者使用以下命令检查特定包：
npm ls -g [package-name]
For example: npm ls -g @angular/cli
例如： npm ls -g @angular/cli
回答by SHARATH P
In Windows we use the following command to find out whether the package is installed or not. Please refer image for details.
在 Windows 中，我们使用以下命令来确定软件包是否已安装。详情请参考图片。
npm list -g | find "create"
