How to check the nodejs version (three methods)

Node.js is a very popular open source JavaScript runtime environment that runs on multiple platforms, including Linux, OS X, and Windows. However, for some novice developers, they may not know how to check the version of Node.js currently installed on the system. This article will introduce three methods to check the Node.js version.

Method 1: Use the command line to check the Node.js version

Whether you are on Linux, OS X or Windows operating system, you can check the Node.js version by opening the terminal command line. The following is how to check the Node.js version from the command line of different operating systems:

Linux and OS X

1. Open the terminal

2. Enter the following command:

   $ node -v

   In this way, the system will output the current version number of Node.js.

Windows

1. Open the Node.js command prompt

2. Enter the following command:

   > node -v

   Just You can get the current Node.js version number.

Method 2: Obtain the Node.js version information in the program through Node.js

In addition to viewing the Node.js version information on the command line, Node. js also provides a process global object, which provides process.version and process.versions properties to allow Node.js applications to Read and output version information.

The following is a simple Node.js code example for obtaining Node.js version information:

console.log('Node.js 版本信息:', process.version);
console.log('Node.js 依赖包版本信息:', process.versions);

The output results are as follows:

Node.js 版本信息: v10.16.3
Node.js 依赖包版本信息: {
  http_parser: '2.8.0',
  node: '10.16.3',
  v8: '6.8.275.32-node.54',
  uv: '1.28.0',
  zlib: '1.2.11',
  ares: '1.15.0',
  modules: '64',
  nghttp2: '1.39.2',
  napi: '4',
  openssl: '1.1.1c',
  icu: '64.2',
  unicode: '12.1'
}

Method 3: Through Node .js official website View Node.js version information

The Node.js official website provides a page that provides information about a specific version, including release date, maintenance status, and important security tips. The advantage of this page is that you can find release notes for each major version, as well as features introduced and removed by a specific version. URL: https://nodejs.org/en/download/releases/

Summary

This article shows three different ways to view the version of Node.js currently installed on the system. The first is to use the command to find the Node.js version installed in the current system. This is the simplest and most commonly used method. The second is to obtain the version information of Node.js in the program. This method requires a certain understanding of the code. The third method is to query the version information through the Node.js official website. This method is suitable for people who want to know the details and functions of a specific version. Either way, you can easily view the currently installed version of Node.js.

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