How to install nodejs? Detailed steps introduction

With the continuous development of the Internet, more and more front-end developers are beginning to learn Node.js. Node.js is a JavaScript running environment based on the Chrome V8 engine. It allows JavaScript to run on the server side, so front-end and back-end applications can be developed with JavaScript at the same time, which greatly improves productivity. So, how to install Node.js? Next, let’s take a look at the detailed installation steps of Node.js.

1. Prepare the installation environment
Before installing Node.js, we need to install some necessary tools and environments. These tools and environments are necessary for the subsequent installation and use of Node.js. First, we need to install NPM (the package manager for Node.js). NPM is different from Node.js and needs to be installed separately.

1. Installing Node.js requires a C compiler and Python 2.x, so on Windows platforms it is recommended to install Visual Studio's Build Tools or Visual C Build Tools, as well as the Python 2.x version. On Linux platforms, GCC (GNU Compiler) and Python 2.x need to be installed.
2. NPM is the package manager for Node.js, but it will not be installed automatically and needs to be installed manually. When installing Node.js on Windows platforms, NPM will also be installed. If you are using Linux or Mac OS X, you can install Node.js and NPM through your package manager.
3. Check whether Node.js is installed correctly: Enter the node -v and npm -v commands on the command line. If the version number is correctly output, Node.js is installed successfully.

2. Download and install Node.js
Now that we have prepared the installation environment, we can install Node.js.

1. First, visit the Node.js official website (https://nodejs.org/en/) and find the "14.x.x LTS" version in the center of the page (the LTS version is a long-term support version, it is recommended to select LTS version), click this button to download.
2. After entering the download page, select the corresponding version to download according to your operating system. Under Windows systems, select "Windows Installer"; under MacOS systems, select "macOS Installer".
3. After the download is completed, click on the download file to install. Open the folder, double-click the installer, and follow the instructions of the installation wizard to install.
4. If everything goes well, Node.js will be installed in the system.

3. Verify whether the Node.js installation is successful

1. Close all command line windows and terminal windows, and reopen a new command prompt.
2. Enter the node -v command. If the correct version number is displayed, Node.js has been successfully installed.
3. Enter the npm -v command. If the correct version number is displayed, it means that NPM has been installed successfully.

4. Install Node.js module (package)

After installing Node.js and NPM, we can use NPM to install third-party modules.

1. Enter npm install module name on the command line to install this module. For example, enter npm install express to install the Express module.
2. In order to better manage modules, we can also create a new folder and run the npm init command in it to generate a package.json file. This file describes all the modules our application depends on. Module information.
3. If you need to uninstall the installed module, you can use the command npm uninstall module name to uninstall.

Summary:
The above is the installation and configuration process of Node.js. I hope it will be helpful to everyone. During the installation and use process, you may encounter various problems due to different environments and operating systems. However, as long as you study and debug patiently, you can ensure correct installation and start using Node.js.

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