# NodeJS 全局环境变量配置

#### 操作系统

- Win10

#### 下载 [node](https://nodejs.org/zh-cn/download/)  
[![image-1653057408904.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/5fpeQry8jsv0TciS-image-1653057408904.png)](http://book.321jr.com/uploads/images/gallery/2022-05/5fpeQry8jsv0TciS-image-1653057408904.png)

#### 安装 node

- 下载好以后直接双击安装即可，然后点击下图所示的 next

[![image-1653057513498.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/1IapFWzBfRSc8ZjK-image-1653057513498.png)](http://book.321jr.com/uploads/images/gallery/2022-05/1IapFWzBfRSc8ZjK-image-1653057513498.png)

- 接受协议，点击 nex

[![image-1653057571390.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/jPlPLcbQI9wCHGlw-image-1653057571390.png)](http://book.321jr.com/uploads/images/gallery/2022-05/jPlPLcbQI9wCHGlw-image-1653057571390.png)

- 选择安装目录，然后点击 next（<span style="text-decoration: underline;">这里的安装目录一定要记清楚，后面会用到</span>）

[![image-1653057598957.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/QGyX5ftfC8rj0kkG-image-1653057598957.png)](http://book.321jr.com/uploads/images/gallery/2022-05/QGyX5ftfC8rj0kkG-image-1653057598957.png)

- 选择安装选

<table border="1" id="bkmrk-%E9%80%89%E9%A1%B9-%E8%AF%B4%E6%98%8E-node.js-runtim" style="border-collapse: collapse; width: 62.469%;"><tbody><tr><td class="align-left" style="width: 26.7025%;">选项</td><td class="align-left" style="width: 30.1427%;">说明</td></tr><tr><td class="align-left" style="width: 26.7025%;">Node.js runtime</td><td class="align-left" style="width: 30.1427%;">运行环境</td></tr><tr><td class="align-left" style="width: 26.7025%;">npm package manager</td><td class="align-left" style="width: 30.1427%;">npm包管理器</td></tr><tr><td class="align-left" style="width: 26.7025%;">online documentation shortcuts</td><td class="align-left" style="width: 30.1427%;">在线文档快捷方式</td></tr><tr><td class="align-left" style="width: 26.7025%;">Add to PATH</td><td class="align-left" style="width: 30.1427%;">添加到环境变量</td></tr></tbody></table>

全部保持默认，点击 next即可

- 这里可以不勾选，直接点击 next即可

[![image-1653057867824.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/6mtEihCfvlpw6SJB-image-1653057867824.png)](http://book.321jr.com/uploads/images/gallery/2022-05/6mtEihCfvlpw6SJB-image-1653057867824.png)

- 点击install

[![image-1653057938658.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/J626VaPUVE2vHTSC-image-1653057938658.png)](http://book.321jr.com/uploads/images/gallery/2022-05/J626VaPUVE2vHTSC-image-1653057938658.png)

- 等待安装

[![image-1653057965008.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/UmTYEov9iJDTDqLQ-image-1653057965008.png)](http://book.321jr.com/uploads/images/gallery/2022-05/UmTYEov9iJDTDqLQ-image-1653057965008.png)

- 安装完成，点击 finish

[![image-1653057999242.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/34uh4ZeV7Pu2T2St-image-1653057999242.png)](http://book.321jr.com/uploads/images/gallery/2022-05/34uh4ZeV7Pu2T2St-image-1653057999242.png)

#### 验证安装

- win+R快捷键调出下图所

[![image-1653058079015.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/mRSBsTtrV3GKZl1G-image-1653058079015.png)](http://book.321jr.com/uploads/images/gallery/2022-05/mRSBsTtrV3GKZl1G-image-1653058079015.png)

- 输入cmd然后回车，进入dos命令行，输入node -v 如果出现下图所示，代表安装成功

[![image-1653058106265.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/n9STNT2gioY3NVGq-image-1653058106265.png)](http://book.321jr.com/uploads/images/gallery/2022-05/n9STNT2gioY3NVGq-image-1653058106265.png)

- 然后输入npm -v 通常会出现下面错

[![image-1653058123697.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/EXy42Bn3ygcDNIAT-image-1653058123697.png)](http://book.321jr.com/uploads/images/gallery/2022-05/EXy42Bn3ygcDNIAT-image-1653058123697.png)

这就代表我们npm全局环境变量没有配置，接下来就教大家如何配置npm环境变量。

#### npm 环境变量配置

- 配置环境变量  
    我的电脑-&gt;右键-&gt;属性-&gt;高级系统设置-&gt;高级-&gt;环境变量 [![image-1653058204878.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/6NlNmcu1CpMZUFKS-image-1653058204878.png)](http://book.321jr.com/uploads/images/gallery/2022-05/6NlNmcu1CpMZUFKS-image-1653058204878.png)
- 点击 PATH，然后点击编辑 [![image-1653058241025.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/0c7TvTRkeQxDLiWf-image-1653058241025.png)](http://book.321jr.com/uploads/images/gallery/2022-05/0c7TvTRkeQxDLiWf-image-1653058241025.png)
- 把 node安装目录追加到 path里，前面用 ; 分割 [![image-1653058276710.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/xabEL0iFNNJVJA8T-image-1653058276710.png)](http://book.321jr.com/uploads/images/gallery/2022-05/xabEL0iFNNJVJA8T-image-1653058276710.png)

设置完后，不要忘记点确定。

- 重新win+R -&gt;cml–&gt;打开dos命令行，输入npm -v [![image-1653058313229.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/Ug9UYpS49C7yWbU4-image-1653058313229.png)](http://book.321jr.com/uploads/images/gallery/2022-05/Ug9UYpS49C7yWbU4-image-1653058313229.png)

出现版本号，代表 npm全局环境变量配置完成。

#### （选学）配置到 D盘

- 首先在d盘node的安装目录下配置创建两个文件如下图 [![image-1653060556962.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/KQAJATdUGm7kh42w-image-1653060556962.png)](http://book.321jr.com/uploads/images/gallery/2022-05/KQAJATdUGm7kh42w-image-1653060556962.png)
- 这里选择的是 D盘里的 node目录

[![image-1653060601938.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/wXUtBHTz6kWmhnSx-image-1653060601938.png)](http://book.321jr.com/uploads/images/gallery/2022-05/wXUtBHTz6kWmhnSx-image-1653060601938.png)

- 输入

注意：这里的 D:\\install\\node是我的node安装目录，你要替换成你自己的。  
执行完以后在输入npm root -g 可以看到我们的目录已经变

[![image-1653060786713.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/fYn2GinKj2LrnN42-image-1653060786713.png)](http://book.321jr.com/uploads/images/gallery/2022-05/fYn2GinKj2LrnN42-image-1653060786713.png)

- 把D:\\install\\node\\node\_global配置到环境变量的PATH下，如下图 [![image-1653060849229.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/8hX5YZBsKjC3mWXI-image-1653060849229.png)](http://book.321jr.com/uploads/images/gallery/2022-05/8hX5YZBsKjC3mWXI-image-1653060849229.png)
- 验证  
    如我们想安装request类
    
    [![image-1653060911778.png](http://book.321jr.com/uploads/images/gallery/2022-05/scaled-1680-/lmFtEjSN9LYPvxMs-image-1653060911778.png)](http://book.321jr.com/uploads/images/gallery/2022-05/lmFtEjSN9LYPvxMs-image-1653060911778.png)

以后下载的类库，就存到 D盘，不占 C盘空间了