Welcome to the Reaction Time Tester – a fun and interactive web app designed to measure how quickly you can respond to visual cues! Built with HTML, CSS, and JavaScript, this tool challenges your reflexes with randomized delays and color-based prompts. Whether you're looking to improve your reaction speed or just want to test your reflexes, this simple yet engaging application provides instant feedback and tracks your performance over time.

With intuitive color indicators, detailed statistics, and persistent result tracking, the Reaction Time Tester offers a seamless experience across all devices. The app transitions between different states (waiting, ready, success, and "too soon") with visual feedback, while storing your best times and averages in the browser. Click when the color changes, view your results, and see how your reaction time improves with practice!

You may also check this simple HTML, CSS and JavaScript project:

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• Advanced Tic-Tac-Toe Game
• Speed Converter Tool
• Solar System Explorer

✨ Features:

✅ Randomized Delay

• The test starts with a random delay (1–5 seconds) before prompting a reaction, preventing anticipation.

✅ Visual Cues – Color changes indicate different states:

• 🔵 Blue (Waiting) – Click to start the test.

• 🟡 Yellow (Ready) – Preparing for the reaction cue.

• 🔵 Blue (Click Now!) – React as fast as possible!

• 🟢 Green (Success) – Shows your reaction time.

• 🔴 Red (Too Soon!) – Penalizes premature clicks.

📊 Performance Tracking – Records and displays:

• Last reaction time

• Best (fastest) time

• Average reaction time

• Total tests completed

📅 History Log – Stores the last 10 attempts with timestamps.
🔄 Data Persistence – Saves results in localStorage so progress isn’t lost.
📱 Responsive Design – Works smoothly on both desktop and mobile devices.

🛠 Technologies Used:

• HTML5 – Structure of the web app

• CSS3 – Styling with modern transitions and animations

• JavaScript – Logic, event handling, and data storage

• localStorage – Saves user results between sessions

🎮 How to Use:

Start the Test

1. Click the blue area or the "Start Test" button.

2. The screen will turn yellow while waiting for the cue.

React Quickly!

1. When the screen turns blue again, click immediately.

2. If you click too soon, it turns red—try again!

View Results

• After clicking, your reaction time (in milliseconds) is displayed.

• Check your stats (best time, average, etc.) below.

Reset or Continue

• Click the test area again to restart.

• Use "Reset Stats" to clear all history.

Sample Screenshots of the Project

Landing Page

Sample Result

How to Run?

• Download the provided source code zip file.
• Extract the downloaded zip file.
• Open the html file and you are now ready to go!

Video Demonstration for Installation/Setup:

Conclusion:

In conclusion, the Reaction Time Tester provides an engaging way to measure and improve your reflexes through its simple yet effective design. By combining visual cues with randomized delays and performance tracking, this web app offers both an entertaining challenge and valuable insights into your reaction speed. Whether you're using it for casual fun or serious reflex training, its intuitive interface and persistent data storage make it easy to track your progress and compete against your best times.

That's it! I hope this "Reaction Time Tester Using HTML, CSS and JavaScript" will assist you on your  programming journey, providing value to your current and upcoming projects.

For additional tutorials and free source codes, explore our website.

Enjoy Coding :>>