Quiz App
Learn Python, JavaScript, Java and more with free interactive lessons, real projects and a built-in help dictionary. Beginner-friendly.
Part of the free JavaScript course at LearnCodingFast — hands-on lessons with examples you run in your browser, plus practice exercises and a quick quiz.
Intermediate Project — Master Logic, State Management & Dynamic UI
Project Overview
A Quiz App is the perfect project for learning:
- State management
- Conditional rendering
- Answer validation
- Interactive UI
- Logic-based programming
- ✨ Khan Academy quizzes
- ✨ Coding bootcamp quiz systems
You'll build a fully interactive quiz engine that shows one question at a time, tracks score, displays progress, and shows the final results screen.
Goal
- ✔ Show one question at a time
- ✔ Let the user select from multiple choices
- ✔ Immediately show correct/incorrect feedback
- ✔ Track score
- ✔ Track progress (Question 3/10)
- ✔ Display final results with percentage
- ✔ Allow restarting the quiz
Once you finish this, you'll understand exactly how to build logic-heavy apps.
Core Concepts You'll Learn
1. State management
- currentQuestionIndex
- selected answer
- quiz completed state
2. Conditional rendering
- Question screen
- Results screen
3. Event handling
- Selecting an answer
- Moving to next question
- Restarting quiz
4. Dynamic UI updates
- Question text
- Answer buttons
- Progress bar
5. Array iteration
Starter Code — Complete Quiz App
- ✔ 10 JavaScript questions
- ✔ Progress tracking
- ✔ Immediate feedback
- ✔ Restart button
- ✔ Fully interactive
Enhancement Ideas
Add these to turn your Quiz App into a real platform:
⏲ Timer
🧩 Categories
- General Knowledge
🎚 Difficulty Levels
🏆 Leaderboard
📜 Review Mode
Show all questions with correct answers at the end.
🔀 Question Randomization
🌐 API Integration
Completion Checklist
- Questions display one at a time
- Score system works
- Correct answer highlighted
- Wrong answer shows real answer
- Next button appears only after answering
- Results screen displays score & percentage
- Restart button resets quiz
- Smooth UI and clean layout
- No console errors