How to see the version number in nodejs

How to check the version number of Node.js

Node.js is a popular open source JavaScript runtime environment for building high-performance web applications and tools. If you need to determine the version of Node.js and the date it was installed, then you can use one of the following methods to check its version.

Method 1: Use the command line to view the version number

Open a terminal or command prompt and enter the following command:

node -v

Press the Enter key to view your The version number of the currently installed Node.js. For example, the output might look like this:

v14.15.0

This command displays the major version information of Node.js, which contains the "v" letter and the specific version number. This command works on most operating systems, including Windows, macOS, and Linux. If you have installed Node.js via your package manager, you can use this command from anywhere to check the version.

Method 2: View the version number in the Node.js application

If you are writing an application using Node.js, then you can access it by accessing the process object of the Node.js API Current version number. You can use the following code to print the version number:

console.log(process.version);

This will output the exact same version number as the command line command above. However, please note that this version number is retrieved from the context of the Node.js process, not from the terminal or command prompt.

Check the version number offline

If you are unable to check the version number through the command line or Node.js application, you can use the README file in the Node.js installer directory on your computer.

On Windows, if you have Node.js installed, you can find the Node.js installer's home directory by using a file browser to access the following path:

C:Program Files
odejsREADME.md

On macOS, You can find the home directory of the Node.js installer in the following path:

/usr/local/lib/node_modules/README.md

On a Linux system, you can find the home directory in the following location:

/usr/lib/node_modules/README.md

Once you have found the README file , you can open it and look for the "Node.js version" or "Version" section. The README file in the directory contains the currently installed version of Node.js and the release date of the installer.

Summary

No matter which method you use, checking the version number of Node.js is easy. Using command line commands is the fastest way, but if you need a version number to write an application, you can use the process object. Finally, if you can't access Node.js' command line interface by any means, you can find the version number in the README file. Either way, you can always look up the version number of Node.js to ensure your application is compatible with any dependencies and runtime requirements.

The above is the detailed content of How to see the version number in nodejs. For more information, please follow other related articles on the PHP Chinese website!