Code for stop clock (watch)…

3 min readJan 17, 2025

These codes work together to create a fully functional Stop clock.

HTML

The HTML structure sets up the game board and a simple interface for the user.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Stopwatch</title>
  <link rel="stylesheet" href="styles.css">
</head>
<body>
  <div class="stopwatch-container">
    <h1 class="title">Stopwatch</h1>
    <div class="stopwatch">
      <div class="time" id="time">00:00:00</div>
      <div class="buttons">
        <button id="start" class="btn">Start</button>
        <button id="stop" class="btn">Stop</button>
        <button id="reset" class="btn">Reset</button>
      </div>
    </div>
  </div>
  <script src="script.js"></script>
</body>
</html>

Css

The CSS adds styling, including a gradient background, hover effects, and animations to make the game visually appealing. The design is clean, with smooth transitions and a modern look.

/* General Styles */
body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: linear-gradient(120deg, #f3e7ff, #d3efff, #cfffd3);
  background-size: 400% 400%;
  animation: gradientBackground 8s ease infinite;
}

/* Gradient Animation */
@keyframes gradientBackground {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.stopwatch-container {
  text-align: center;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  width: 320px;
  height: 320px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.title {
  font-size: 1.8rem;
  font-weight: 600;
  color: #5a5a5a;
  margin-bottom: 15px;
  text-shadow: 0px 2px 6px rgba(0, 0, 0, 0.15);
}

.stopwatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.time {
  font-size: 2.5rem;
  font-weight: bold;
  color: #555;
  background: linear-gradient(145deg, #ffffff, #f3e7ff);
  border-radius: 50%;
  width: 170px;
  height: 170px;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: inset 0 6px 12px rgba(0, 0, 0, 0.1), 0 4px 20px rgba(0, 0, 0, 0.15);
  border: 4px solid rgba(255, 255, 255, 0.4);
}

.buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Button Styling */
.btn {
  font-size: 1rem;
  padding: 12px 18px;
  border: none;
  border-radius: 30px;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(145deg, #ffc1e3, #ff8eb2);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.btn:hover {
  transform: translateY(-5px);
  background: linear-gradient(145deg, #ff8eb2, #ffc1e3);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
}

.btn:active {
  transform: translateY(0);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

/* Custom Button Styles */
#start {
  background: linear-gradient(145deg, #a4edc8, #74d7aa);
}

#start:hover {
  background: linear-gradient(145deg, #74d7aa, #a4edc8);
}

#stop {
  background: linear-gradient(145deg, #ffcbcb, #ff8686);
}

#stop:hover {
  background: linear-gradient(145deg, #ff8686, #ffcbcb);
}

#reset {
  background: linear-gradient(145deg, #cabdff, #a799ff);
}

#reset:hover {
  background: linear-gradient(145deg, #a799ff, #cabdff);
}

Javascript

The JavaScript handles the game logic and makes the computer a challenging opponent by using the minimax algorithm.

let startTime;
let elapsedTime = 0;
let timerInterval;

const timeDisplay = document.getElementById('time');
const startButton = document.getElementById('start');
const stopButton = document.getElementById('stop');
const resetButton = document.getElementById('reset');

function formatTime(ms) {
  const totalSeconds = Math.floor(ms / 1000);
  const minutes = Math.floor(totalSeconds / 60);
  const seconds = totalSeconds % 60;
  const milliseconds = Math.floor((ms % 1000) / 10);

  return `${String(minutes).padStart(2, '0')}:${String(seconds).padStart(2, '0')}:${String(milliseconds).padStart(2, '0')}`;
}

function startTimer() {
  startTime = Date.now() - elapsedTime;
  timerInterval = setInterval(() => {
    elapsedTime = Date.now() - startTime;
    timeDisplay.textContent = formatTime(elapsedTime);
  }, 10);
  startButton.disabled = true;
  startButton.style.opacity = "0.7";
}

function stopTimer() {
  clearInterval(timerInterval);
  startButton.disabled = false;
  startButton.style.opacity = "1";
}

function resetTimer() {
  clearInterval(timerInterval);
  elapsedTime = 0;
  timeDisplay.textContent = "00:00:00";
  startButton.disabled = false;
  startButton.style.opacity = "1";
}

startButton.addEventListener('click', startTimer);
stopButton.addEventListener('click', stopTimer);
resetButton.addEventListener('click', resetTimer);

In short, HTML builds the calculator, CSS makes it look nice, and JavaScript makes it functional!
Save the files as index.html, styles.css, and script.js, and test in a browser.
The game is responsive and supports both desktop and mobile devices, ensuring a smooth and enjoyable experience.
— code with gp…

Code for stop clock (watch)…

Sign up to discover human stories that deepen your understanding of the world.

Free

Membership

Written by Code With Gp

Responses (1)