Node.js installation and environment configuration tutorial

1. Installation environment

1. Native system: Windows 10 Pro (64-bit)

2. Node.js: v6.9.2 LTS (64-bit)

This article mainly introduces the Node.js installation and environment configuration methods. The tutorial in this article is very detailed, I hope it can help you.

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. Test

3. Preparation

1. Node Introduction to .js
Simply put, Node.js is JavaScript running on the server side. 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 [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 first perform a simple test to see if the installation is successful. , and you need to configure the environment later

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:

Here is a description: the new version of Node.js has its own npm, when installing Node.js will be installed together. The role of npm is to manage the packages that Node.js depends on. It can also be understood as the things that need to be installed to install/uninstall Node.js

5. Environment configuration

Note: The environment configuration here 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 following optional parameter -g, g represents global installation) When installing the statement, the installed module will be installed in the path [C:\Users\username\AppData\Roaming\npm], occupying the 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 configuration, 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 means global installation

<p><img src="/static/imghwm/default1.png" data-src="http://files.jb51.net/file_images/article/201709/2017091814012418.png?x-oss-process=image/resize,p_40" class="lazy" alt="">、</p> <p>Supplement</p> <p>When installing modules through npm, they are downloaded from foreign mirrors. Sometimes the module installation fails due to network reasons. Fortunately, Alibaba has The team maintains domestic mirrors: http://npm.taobao.org/ There are instructions for use above. </p> <p>Related recommendations: <br></p> <p><a href="http://www.php.cn/js-tutorial-11538.html" target="_self">Node.js installation tutorial and detailed explanation of using NPM package manager_node.js</a></p> <p><a href="http://www.php.cn/js-tutorial-2693.html" target="_self">Quick Master the installation and operation method of Node.js environment_node.js</a></p> <p><a href="http://www.php.cn/js-tutorial-385325.html" target="_self">Windows installation Node.js error: 2503, 2502 what to do</a></p>

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