Build a Countdown Timer Website

Introduction

Hello, fellow developers! Today, I'm excited to share a project I recently completed: a Countdown Timer. This project is a great way to learn and practice JavaScript, particularly in the areas of time manipulation and DOM updates. Whether you're looking to build a countdown for an event, a product launch, or just a fun timer, this project is a perfect start.

Project Overview

The Countdown Timer allows users to set a target date and time, and it will continuously count down the days, hours, minutes, and seconds until that moment arrives. The timer updates in real-time, offering a visually appealing and responsive design. This project is ideal for developers who want to enhance their skills in creating dynamic and interactive web applications.

Features

Real-Time Countdown: The timer updates every second, showing the remaining time until the specified date.
Responsive Design: The layout adapts seamlessly across different devices and screen sizes.
Customizable End Date: The target date and time can be easily modified, making the timer versatile for various events.

Technologies Used

HTML: Used for structuring the content on the webpage.
CSS: Applied for styling the webpage and ensuring responsiveness.
JavaScript: Implemented for calculating the time remaining and updating the DOM in real-time.

Project Structure

Here's a quick look at the project structure:

Countdown-Timer/
├── index.html
├── style.css
└── script.js

index.html: Contains the HTML structure of the webpage.
style.css: Holds the CSS styles, including responsive design rules.
script.js: Manages the countdown logic and DOM updates using JavaScript.

Installation

To get started with the project, follow these steps:

Clone the repository:

git clone https://github.com/abhishekgurjar-in/Countdown-Timer.git

Open the project directory:
```
cd Countdown-Timer
```
Run the project:
- You can either run it on a local server or simply open the index.html file in a web browser.

Usage

Open the website in a web browser.
Watch the timer count down to the specified end date.
Customize the end date in the script.js file to suit your event or requirement.

Code Explanation

HTML

The index.html file contains the structure of the webpage, including the countdown display and a simple header. Below is a snippet of the HTML code:

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Countdown Timer</title>
    <link rel="stylesheet" href="./style.css" />
  </head>
  <body>
    <div class="main">
      <div class="overlay">
        <div class="header">
          <h1>Countdown Timer</h1>
        </div>
        <div class="title">We are coming soon</div>
        <div class="title" id="end-date">4 July 2025 10:00 PM</div>
        <div class="col">
          <div>
            <input type="text" readonly value="0" />
            <br />
            <label>Days</label>
          </div>
          <div>
            <input type="text" readonly value="0" />
            <br />
            <label>Hours</label>
          </div>
          <div>
            <input type="text" readonly value="0" />
            <br />
            <label>Minutes</label>
          </div>
          <div>
            <input type="text" readonly value="0" />
            <br />
            <label>Seconds</label>
          </div>
        </div>
        <div class="footer">
          <p>Made with ❤️ by Abhishek Gurjar</p>
        </div>
      </div>
    </div>
    <script src="./script.js"></script>
  </body>
</html>

CSS

The style.css file contains styles that ensure the webpage is visually appealing and includes responsiveness for different screen sizes. Here are some key styles:

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

.main {
  width: 100%;
  height: 100vh;
  background: url(./images/bg.jpg);
  background-size: cover;
}

.overlay {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: white;
  background-color: rgba(0, 0, 0, 0.7);
}

.title {
  color: white;
  text-align: center;
  font-size: 2.5rem;
  padding: 25px;
}

.col {
  margin-top: 10px;
  width: 1000px;
  color: white;
  justify-content: center;
  display: flex;
}

.col div {
  width: 250px;
  text-align: center;
}

input {
  background-color: rgba(255, 255, 255, 0.9);
  border-color: transparent;
  border-radius: 5px;
  height: 50px;
  text-align: center;
  font-size: 20px;
}

.header {
  margin: 40px;
  text-align: center;
}

.footer {
  margin: 300px;
  text-align: center;
}

JavaScript

The script.js file manages the countdown logic, updating the display every second. Below is a snippet of the JavaScript code:

const endDate = "4 July 2025 10:00 PM";

document.getElementById("end-date").innerText = endDate;
const input = document.querySelectorAll("input");

function countDown() {
  const end = new Date(endDate);
  const now = new Date();
  const diff = (end - now) / 1000;

  if (diff < 0) return;

  input[0].value = Math.floor(diff / 3600 / 24);
  input[1].value = Math.floor(diff / 3600) % 24;
  input[2].value = Math.floor(diff / 60) % 60;
  input[3].value = Math.floor(diff) % 60;
}

countDown();
setInterval(countDown, 1000);

Live Demo

You can check out the live demo of the Countdown Timer here.

Conclusion

Building this Countdown Timer was a valuable learning experience that allowed me to explore JavaScript's capabilities in time manipulation and DOM interaction. I hope this project inspires you to create your own dynamic and interactive applications. Feel free to explore the code, customize it, and use it in your own projects. Happy coding!

Credits

This project was inspired by the need for a simple and effective countdown tool for various events.

Author

Abhishek Gurjar
- GitHub Profile

Blog