Let's talk about how to install Node.js and create new files

Node.js is a popular JavaScript runtime environment in modern web development. It can be used for server-side development or as a build tool to run in a local development environment. It's very simple to install and use. This article will provide you with some basic knowledge about Node.js, including how to install Node.js and how to run Node.js sample programs locally.

1. Install Node.js

1. Download Node.js

Before installing Node.js, we need to download it from the official website (https://nodejs. org) to download the latest version of Node.js. Choose to download the version appropriate for your system, and then follow the download prompts to complete the download.

2. Install Node.js

After the download is complete, double-click the downloaded installer and follow the prompts to complete the Node.js installation process. The installation process is very simple, just click "Next" along the way.

2. Create a new file

In Node.js, we can use the command line tool that comes with Node.js to execute JavaScript code and interact with the file system.

Below, we will demonstrate how to create and edit a JavaScript file.

1. Open the command line tool

First, we need to open the command line tool of the operating system. In Windows systems, we can use the "Command Prompt" tool in the "Start Menu". In MacOS system, we can use the "Terminal" tool. In Linux systems, we can use the terminal tools that come with the system.

In the command line tool, we can use the cd command to change the current working directory (Working Directory). For example, we can change the working directory to desktop to create a new JavaScript file on the desktop.

2. Create a new JavaScript file

In the command line tool, we can use the touch command to create a new empty JavaScript file. In the Windows operating system, we need to download and install the touch command first.

For example: Under MacOS system, we can execute the following command to create a new JavaScript file on the desktop.

cd ~/Desktop
touch index.js

This command will create a file named index.js on the desktop.

3. Edit JavaScript file

Now, we have successfully created a JavaScript file. We can use any text editor to edit the contents of this file. For example, in the command line we can use vi or nano editor to open the file.

Next, insert the following code in the file, which is a simple Node.js program.

console.log('Hello, World!');

4. Run JavaScript File

Now that we have created a simple Node.js program using the command line tool, we can use Node.js to run the program . Open the command line tool, enter the directory where the JavaScript file is located, and then execute the following command.

node index.js

This command will run the file and output the following information.

Hello, World!

At this point, we have completed the installation of Node.js and how to create a new JavaScript file locally.

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