Sharpen Your Coding Skills with 25 Daily JavaScript and Python Challenges 🎅 AdventJS 2025
The new edition of AdventJS is live, and this year it is bigger, cleaner, and more fun than ever.
If you are new to AdventJS, it is a daily coding challenge series that runs from December 1 to December 25.
Each day unlocks a new puzzle that you can solve with code right in your browser with real tests, instant feedback, and a growing leaderboard full of friendly competition.
The coding challenges can be solved with JavaScript, Python, and TypeScript.
This edition introduces several improvements and a stronger focus on learning through practice.
What is New This Year?
✓ Cleaner and faster interface
The platform has been redesigned to load faster, feel more minimal, and remove distractions so that you focus entirely on problem solving.
✓ A more accessible difficulty curve
Challenges now increase difficulty more gradually. The early tasks help beginners warm up, while the later ones push experienced developers to think creatively.
✓ Secret tests and improved validation
Each challenge includes hidden tests that prevent hardcoded or brittle solutions. Passing the tests means your code actually works. Also, you could check the console in each test.
✓ Achievements and progress tracking
Solving challenges unlocks achievements that you can proudly share. You also keep a full history of your attempts to revisit later.
Who is AdventJS For?
AdventJS is designed for everyone who wants to sharpen their algorithmic thinking:
- Beginners who want to learn problem solving with instant feedback
- Frontend and backend developers who want to train daily
- People preparing interviews or coding tests
- Anyone who enjoys a good puzzle with a festive twist
No configuration, no toolchain, no environment setup. Just open the challenge and start coding.
Why Join AdventJS 2025?
Daily practice builds consistency and confidence. Even a five minute attempt can dramatically improve how you think about code.
But the best part is the community. Thousands of developers worldwide participate each year, compare solutions, discuss strategies, and help each other grow.
How to Start
Go to https://adventjs.dev
Log In with your GitHub account, select the available challenge for the day, write your solution, run the tests, and submit. That is it.
A Final Note
This project is built to encourage learning, curiosity, and experimentation. Whether you finish all 25 challenges or just try a few, the important part is enjoying the experience and learning something new each day.
Happy coding and welcome to AdventJS 2025.