This project demonstrates how to use the .reduce() method in JavaScript through four practical and beginner-friendly examples. From summing numbers to grouping items by category, each page focuses on a different use case to help you understand how .reduce() works behind the scenes and when to use it.
- Summing numbers in an array
- Counting completed tasks
- Finding the longest word
- Grouping objects by category (with clear breakdown of logic)
Each example is self-contained and uses a simple React setup with clean, readable UI. Perfect for both beginners and those looking to sharpen their array method skills.
This project is part of the Dev Steps Tutorials series by Jakkrit Turner.
Follow the complete tutorial here:
JavaScript Reduce Tutorial on jkturner.site
- Next.js 15.3.3
- Tailwind CSS 4