Graphical tutorial on Node.js installation and environment configuration

1. Installation environment

1. Native system: Windows 10 Pro (64-bit)
2. Node.js: v6.9.2LTS (64-bit)

2 , Steps to install Node.js

1. Download the Node.js version corresponding to your system: https://nodejs.org/en/download/
2. Select the installation directory for installation
3 , Environment configuration
4, Testing

3. Early preparation

1. Introduction to Node.js
Simply put, Node.js is JavaScript running on the server. Node.js is a JavaScript runtime environment based on the Chrome V8 engine. Node.js uses an event-driven, non-blocking I/O model, making it lightweight and efficient. Node.js's package manager npm is the world's largest open source library ecosystem.
2. Download Node.js
Open the official website download link: https://nodejs.org/en/download/ What I downloaded here is node-v6.9.2-x64.msi, as shown below:

4. Start the installation

1. After the download is completed, double-click "node-v6.9.2-x64.msi" to start installing Node.js

Click the [Next] button

Check the check box and click the [Next] button

After modifying the directory, click the [Next] button

##After installation, click the [Finish] button to complete the installation

At this point, Node.js has been installed. You can perform a simple test first to see if the installation is successful. There will be more details later. To configure the environment

Press the [win+R] keys on the keyboard, enter cmd, and then press Enter to open the cmd window

##The directory after installation is as shown below:

Note here: the new version of Node.js has its own npm, which will be installed together when installing Node.js , the role of npm is to manage the packages that Node.js depends on, and can also be understood as the things that need to be installed/uninstalled by Node.js

5. Environment configuration

Instructions: Here The environment configuration mainly configures the path where the global module installed by npm is located, and the path of the cache. The reason for configuring it is because in the future, it is similar to: npm install express [-g] (the optional parameter -g later, g stands for global installation), the installed module will be installed in the path [C:\Users\username\AppData\Roaming\npm], occupying C drive space.

For example: I want to put the path of the full module and the cache path in the folder where I installed node.js, then create two folders [node_global] under the folder I installed [D:\Develop\nodejs] ] and [node_cache] as shown below:

After creating two empty folders, open the cmd command window and enter

npm config set prefix "D:\Develop\nodejs\node_global"
npm config set cache "D:\Develop\nodejs\node_cache"

Next set the environment variables, close the cmd window, "My Computer" - right click - "Properties" - "Advanced System Settings" - "Advanced" - "Environment Variables"

Enter the environment variables dialog box, create a new [NODE_PATH] under [System Variables], enter [D:\Develop\nodejs\node_global\node_modules], and change [Path] under [User Variables] to [D :\Develop\nodejs\node_global】

## 6. Test

After the configuration is completed, install a module to test. We will install the most commonly used express module, open the cmd window,

Enter the following command to install the module globally:

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

related suggestion:

Node.js installation tutorial and detailed explanation of using NPM package manager_node.js

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