Nodejs installation and global configuration (super detailed)

安装node.js

Download the appropriate one for your computer systemNode.js版本：下载 | Node.js 中文网

我这里下载的是node-v16.13.0-x64.msi,如下图

下载完成后,双击”node-v16.13.0-x64.msi“,会看到如下界面,然后开始安装

nodejs在D盘根目录下,该文件是空的

到这里node.js已经安装完成, 可以先进行下简单的测试安装是否成功了,后面还要进行环境配置 在键盘按下【win+R】键,输入cmd,然后回车,打开cmd窗口

安装完后的目录如下图所示：

全局配置node.js

说明： 这里的环境配置主要配置的是npm安装的全局模块所在的路径,以及缓存cache的路径,之所以要配置,是因为以后在执行类似：npm install express [-g] （后面的可选参数-g,g代表global全局安装的意思）的安装语句时,会将安装的模块安装到【C:Users用户名AppDataRoaming pm】路径中,占C盘空间.

I want to put the path where the global module is located and the cache path in menode.js安装的文件夹中,则在我安装的文件夹nodejsCreate two folders manually【node_global】和【node_cache】

然后打开cmd命令窗口,输入(Note the difference in the words of the two lines of commands)

npm config set prefix "D:
odejs
ode_global(Write the path where your file is located here)"
npm config set cache "D:
odejs
ode_cache(Write the path where your file is located here)

接下来设置环境变量,关闭cmd窗口,“我的电脑”-右键-“属性”-“高级系统设置”-“高级”-“环境变量”

进入环境变量对话框,将【用户变量】下的【Path】修改为【D: odejs ode_global】

修改完成后,点击确定按钮.然后在【系统变量】下新建【NODE_PATH】,输入【D: odejs ode_global ode_modules】

配置完后,安装个module测试下,我们就安装最常用的express模块,【win+r】打开cmd窗口, 输入如下命令进行模块的全局安装：

npm install express -g     #-g是全局安装的意思

You will find an installation error,The error message is that the operation is not allowed.这是因为nodojsThe module operation permission in the file is insufficient(There is a workaround onlineAppDataThe suffix under the same level is .npmrc的文件删除,但是删除后node.jsThe global configuration is automatically restored toC盘,Therefore, this operation requires caution).So I don't do this kind of operation on the Internet here,We can modify the permissions ourselves.

Modifying permissions is divided into two steps,The first step is to modify your installationnode.jsfolder permissions

关闭cmd窗口,找到你安装node.js的文件夹(我的文件夹是nodejs) -右键-属性-安全

之后会出现如下提示,Keep clicking continue

You can see that the first character already exists"完全控制"的权限了,Repeat the steps to modify the permissions of the first role for the other three roles,Until these four characters have it"完全控制"until the authority

The second step is to modify your installationnode.jsPermissions for subfiles of the folder,如下图

Repeat the first step to modify permissions,The three files framed above must be modified,Every character is also modified.

After all permissions are modified,【win+r】输入cmd,打开cmd窗口,输入

npm install express -g

when you install itexpressIf the module appears in the custom global path, the installation is successful(如上图所示).

到这里,node.jsThe global configuration is also completed??.

今天的分享就到这里啦~~

如有错误,Welcome to Yazheng anytime.

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