Reaction Time Game Using HTML & CSS in JavaScript with Source Code
The Reaction Time Game is an interactive web application built entirely with JavaScript. The gameplay is straightforward — the player must click a specific button as quickly as possible once it appears, with the app measuring and displaying the player's reaction time. The Reaction Time Game in JavaScript offers an engaging and rewarding experience, making it an ideal project for beginners exploring game development. This project provides hands-on practice in core JavaScript concepts such as logic building, timing functions, event handling, and DOM manipulation. Additionally, it serves as a great introduction to performance measurement and user interaction responsiveness, helping developers build more dynamic and interactive web applications.
The Reaction Time Game Using HTML & CSS in JavaScript with Source Code is free to be downloaded just read the content below for more info. This application is for educational purpose only.
Reaction Time Game Using HTML & CSS in JavaScript with Source Code Basic Information
- Language used: JavaScript
- Front-end used: HTML & CSS
- Coding Tool used: Notepad++ or any text editor that can run html files
- Type: Web Application
- Database used: None
Reaction Time Game
A Reaction Time Game in JavaScript is an interactive browser-based game designed to measure how quickly a user can respond to a visual stimulus. The game typically involves a simple user interface where the screen changes color or a shape appears after a random delay. Once the change occurs, the player must click as quickly as possible, and the game calculates the time between the visual cue and the user's response—this is the reaction time, usually displayed in milliseconds. The game is built using HTML, CSS, and JavaScript, often incorporating functions like setTimeout for delays and Date.now() or performance.now() to track timing accurately. It can include features such as random wait times, high score tracking, and feedback messages to enhance engagement. This type of game is not only fun but also serves as a practical tool to help users test and improve their reflexes and attention.
Reaction Time Game Using HTML & CSS in JavaScript with Source Code Features
- Simple Gameplay Objective
- Measures how fast a player can respond to a visual signal.
- The goal is to click as quickly as possible when the screen changes color or shows a signal.
- Randomized Start Delay
- The signal appears after a random delay (usually 1–5 seconds), preventing the player from anticipating the change.
- Reaction Time Measurement
- Captures the exact milliseconds it takes for the user to click after the signal appears.
- Displays the reaction time in ms after each attempt.
Sample Application Screenshot:



Reaction Time Game Using HTML & CSS in JavaScript with Source Code Installation Guide
- Download the source code in this site.
- Locate and Extract the zip file.
- Open the extracted folder
- Find and locate the file "index.html".
- Open the file in a web browser(Chrome, Firefox, etc..).
That's all, The Reaction Time Game was created fully functional using JavaScript language. I hope that this project can help you to what you are looking for. For more projects and tutorials please kindly visit this site. Enjoy Coding!
The Reaction Time Game Using HTML & CSS in JavaScript with Source Code is ready to be downloaded just kindly click the download button below.
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Reaction Time GameNote: Due to the size or complexity of this submission, the author has submitted it as a .zip file to shorten your download time. After downloading it, you will need a program like Winzip to decompress it.
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