How to check nodejs version number

Node.js is a popular server-side development language based on Google's V8 engine and written in JavaScript. In the development of Node.js, querying the current Node.js version number is a very basic operation, which helps us determine the version we are currently using and better manage our projects. In this article, we will explain how to query the Node.js version number on different platforms.

Find the Node.js version number in the command line

In most cases, we can easily find the Node.js version number in the command line. The following is how to find the Node.js version number on different platforms:

Find the Node.js version number on the Windows platform

On the Windows platform, we can use the following command to find the current Node.js version number:

node -v

After running the command, the version number of the current Node.js installation will be output, for example:

v14.17.3

Find the Node.js version number on macOS and Linux platforms

On macOS and Linux platforms, we can use the following command to find the current Node.js version number:

node -v

Similarly, after running the command, the version number of the current Node.js installation will be output. , for example:

v14.17.3

Use the package.json file to find the Node.js version number

We can also find it by checking the package.json file in the root directory of our project The current Node.js version number. After opening the file, we can see the following code:

{
  "name": "my-project",
  "version": "1.0.0",
  "description": "My project description",
  "main": "index.js",
  "scripts": {
    "test": "echo "Error: no test specified" && exit 1"
  },
  "author": "Your Name",
  "license": "MIT",
  "dependencies": {
    "express": "^4.17.1"
  }
}

Under the dependencies field of the package.json file, we can see the Node.js of the current project rely. For example, if we see the following entry under the dependencies field:

"dependencies": {
  "node": "^14.17.3"
}

then the currently installed version is 14.17.3.

Find the Node.js version number in the Node.js application

We can use the following code to find the Node.js version number in the Node.js application:

const version = process.version;
console.log(version);

After running the code, we can see the currently used Node.js version number in the console.

Summary

In Node.js development, querying the current Node.js version number is a very basic operation. No matter we are on Windows, macOS, or Linux platforms, we can easily find the current version number in the command line. In the project, we can also find the current Node.js dependencies and version numbers by checking the package.json file. Additionally, in a Node.js application, we can also use the process.version property to find the current Node.js version number.

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