2. Tutorials
  3. Detect the Node.js Version in a Running Process or App

Detect the Node.js Version in a Running Process or App

ou may want to retrieve the Node.js version running the current process during runtime. For example, you may enforce a certain Node.js release line or at least a specified version while providing a package to the public.

Node.js comes with a handy way to detect which Node.js version is running the process. And this tutorial shows you how to retrieve it.

Node.js Series Overview

  1. String Replace All Appearances
  2. Remove All Whitespace From a String in JavaScript
  3. Generate a Random String in Node.js or JavaScript
  4. Remove Extra Spaces From a String in JavaScript or Node.js
  5. Remove Numbers From a String in JavaScript or Node.js
  6. Get the Part Before a Character in a String in JavaScript or Node.js (Coming soon)
  7. Get the Part After a Character in a String in JavaScript or Node.js (Coming soon)
  8. How to Check if a Value is a String in JavaScript or Node.js (Coming soon)
  1. Filter Data in Streams
  1. Get Number of Seconds Since Epoch in JavaScript
  2. Get Tomorrow’s Date in JavaScript
  3. Increase a Date in JavaScript by One Week
  4. Add Seconds to a Date in Node.js and JavaScript
  5. Add Month(s) to a Date in JavaScript or Node.js
  1. How to Run an Asynchronous Function in Array.map()
  2. How to Reset and Empty an Array
  3. for…of vs. for…in Loops
  4. Clone/Copy an Array in JavaScript and Node.js
  5. Get an Array With Unique Values (Delete Duplicates)
  6. Sort an Array of Integers in JavaScript and Node.js
  7. Sort a Boolean Array in JavaScript, TypeScript, or Node.js
  8. Check If an Array Contains a Given Value in JavaScript or Node.js (Coming soon)
  1. Callback and Promise Support in your Node.js Modules
  2. Run Async Functions/Promises in Sequence
  3. Run Async Functions/Promises in Parallel
  4. Run Async Functions in Batches
  5. How to Fix “Promise resolver undefined is not a function” in Node.js or JavaScript
  6. Detect if Value Is a Promise in Node.js and JavaScript
  1. Human-Readable JSON.stringify() With Spaces and Line Breaks
  2. Create a Custom “toJSON” Function in Node.js and JavaScript
  1. Retrieve the Class Name at Runtime in JavaScript and Node.js
  1. How to Check if an Object is Empty in JavaScript or Node.js (Coming soon)

Detect the Node.js Version at Runtime

Node.js handles apps and services as a long-running process. The Node.js runtime comes with a process package. The process package is globally available in your Node.js app, meaning you can access it in every JavaScript or TypeScript file via the process identifier.

The process comes with two ways retrieving the executing Node.js version at runtime.

The first way is process.version returning the version string including the v prefix.

The second way is via process.versions.node returning an object listing the version of Node.js and all its dependencies. Accessing this property returns the plain version string in semver format (major.minor.patch):

const version = process.version  
// v12.10.1

// Or

const version = process.versions.node  
// 12.10.1

When displaying the Node.js version in an overview, you may use the version with “v” prefix. If you want to parse and reuse the version, it may come handy to use the plain version string without the “v” prefix.

Mentioned Resources

Marcus Pöhls

Marcus is a fullstack JS developer. He’s passionate about the hapi framework for Node.js and loves to build web apps and APIs. Creator of Futureflix and the “learn hapi” learning path.

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