DEV Community

Nozibul Islam
Nozibul Islam

Posted on

22 4 4 4 4

Mastering JavaScript Variable Naming: Best Practices

Why Good Variable Names Matter.

1. Ditch var for Modern Declarations

// Old way (avoid)
var score = 0;

// Modern approach
let userScore = 0; // changeable values
const MAX_SCORE = 100; // constants
Enter fullscreen mode Exit fullscreen mode

2. Key Naming Principles

- Be Descriptive

Use meaningful names that tell a story
totalPrice > x
userProfile > temp

- Avoid Abbreviations

Use full words
orderStatus > ordSt
employeeName > empNm

- Follow Camel Case

productDescription
orderDetails

- Constants in UPPERCASE

const API_KEY = 'your-key';
const MAX_ATTEMPTS = 5;
Enter fullscreen mode Exit fullscreen mode

- Arrays Use Plurals

productNames
employeeList

- Boolean Naming

isActive
hasAccess
canDelete
Enter fullscreen mode Exit fullscreen mode

- Scope-Aware Naming

globalUserCount
localTempVar

Pro Tips

  • Use constby default
  • Declare variables on separate lines
  • Choose names that explain purpose

Clean code starts with thoughtful naming! 🚀

🔗 Connect with me on LinkedIn:

Let’s dive deeper into the world of software engineering together! I regularly share insights on JavaScript, TypeScript, Node.js, React, Next.js, data structures, algorithms, web development, and much more. Whether you're looking to enhance your skills or collaborate on exciting topics, I’d love to connect and grow with you.

Follow me: Nozibul Islam

Billboard image

Monitor more than uptime.

With Checkly, you can use Playwright tests and Javascript to monitor end-to-end scenarios in your NextJS, Astro, Remix, or other application.

Get started now!

Top comments (0)

Some comments may only be visible to logged-in visitors. Sign in to view all comments.

Cloudinary image

Optimize, customize, deliver, manage and analyze your images.

Remove background in all your web images at the same time, use outpainting to expand images with matching content, remove objects via open-set object detection and fill, recolor, crop, resize... Discover these and hundreds more ways to manage your web images and videos on a scale.

Learn more

👋 Kindness is contagious

Immerse yourself in a wealth of knowledge with this piece, supported by the inclusive DEV Community—every developer, no matter where they are in their journey, is invited to contribute to our collective wisdom.

A simple “thank you” goes a long way—express your gratitude below in the comments!

Gathering insights enriches our journey on DEV and fortifies our community ties. Did you find this article valuable? Taking a moment to thank the author can have a significant impact.

Okay