How can I uninstall npm modules in NodeJS ?

在Node.js中，可以通过npm（Node包管理器）来卸载已安装的模块。卸载npm模块的基本命令格式如下：

bash
npm uninstall <module_name>

这里是详细步骤和示例：

1. 全局卸载模块： 如果模块是全局安装的，需要使用 -g标志来卸载它。例如，如果您想全局卸载名为 nodemon的模块，您可以使用以下命令：

   bash
   npm uninstall -g nodemon

2. 本地卸载模块： 如果模块是作为项目依赖安装的，那么您可以直接在项目根目录中执行卸载命令。比如您的项目使用了 express，卸载它的命令如下：

   bash
   npm uninstall express

这将会从您的 node_modules目录中移除 express模块，并且同时更新 package.json和 package-lock.json文件中的依赖信息。

1. 保存到依赖列表中的卸载： 若您在安装模块时使用了 --save、--save-dev或 --save-optional标志，卸载时也应该考虑是否需要从相关的依赖列表中移除。例如，如果 express是作为开发依赖（devDependency）安装的，卸载并更新 package.json的命令如下：

   bash
   npm uninstall --save-dev express

2. 检查是否正确卸载： 卸载后，您可以通过检查项目的 node_modules目录，或者使用 npm list命令来确认模块是否已被正确卸载。

   bash
   npm list
   npm list -g   # 用于检查全局模块

请注意，有时候即使卸载了一个模块，该模块的依赖可能仍然存在于 node_modules目录中。如果您想彻底清理不再需要的模块，可以使用如 npm prune的命令来移除项目中未列在 package.json文件中的所有模块。

以上就是在Node.js中卸载npm模块的基本步骤。

The command is simply npm uninstall <name>

The Node.js documents https://npmjs.org/doc/ have all the commands that you need to know with npm.

A local install will be in the node_modules/ directory of your application. This won't affect the application if a module remains there with no references to it.

If you're removing a global package, however, any applications referencing it will crash.

Here are different options:

npm uninstall <name> removes the module from node_modules but does not update package.json

npm uninstall <name> --save also removes it from dependenciesin package.json

npm uninstall <name> --save-dev also removes it from devDependencies in package.json

npm uninstall -g <name> --save also removes it globally

If it doesn't work with npm uninstall <module_name> try it globally by typing -g.

Maybe you just need to do it as an superUser/administrator with sudo npm uninstall <module_name>.

Well, to give a complete answer to this question, there are two methods (for example we call the installed module as module1):

1. To remove module1 without changing package.json:

   npm uninstall module1

2. To remove module1 with changing package.json, and removing it from the dependencies in package.json:

   npm uninstall --save module1

Note: to simplify the above mentioned commands, you can use -S instead of --save , and can use remove, rm, r, un, unlink instead of uninstall

I just install stylus by default under my home dir, so I just use npm uninstall stylus to detach it, or you can try npm rm <package_name> out.

To uninstall the Node.js module:

shell
npm uninstall <module_name>

This will remove the module from folder node_modules, but not from file package.json. So when we do npm install again it will download the module.

So to remove the module from file package.json, use:

shell
npm uninstall <module_name> --save

This also deletes the dependency from file package.json.

And if you want to uninstall any globally module you can use:

shell
npm -g uninstall <module_name> --save

This will delete the dependency globally.