<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,
initial-scale=1.0">
<title>Bootstrap Stopwatch</title>
<link href=
</head>
<body>
<div class="container mt-5">
<div class="card">
<div class="card-body">
<div class="row">
<div class="col-12 text-center">
<h1>Bootstrap Stopwatch</h1>
</div>
</div>
<div class="row mt-5">
<div class="col-12">
<div class="card">
<div class="card-body">
<div class="card text-white bg-primary">
<div class="card-body text-center" id="time">
<span class="digit" id="hr">00</span>
<span class="txt">Hr</span>
<span class="digit" id="min">00</span>
<span class="txt">Min</span>
<span class="digit" id="sec">00</span>
<span class="txt">Sec</span>
<span class="digit" id="count">00</span>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="row mt-3 justify-content-center">
<button class="btn btn-success mx-2"
id="start">Start</button>
<button class="btn btn-primary mx-2"
id="stop">Stop</button>
<button class="btn btn-danger mx-2"
id="reset">Reset</button>
</div>
</div>
</div>
</div>
<script>
let startBtn = document.getElementById('start');
let stopBtn = document.getElementById('stop');
let resetBtn = document.getElementById('reset');
let hour = 0;
let minute = 0;
let second = 0;
let count = 0;
let timer;
startBtn.addEventListener('click', function () {
// Check if timer is not already running
if (!timer) {
timer = setInterval(stopWatch, 10);
}
});
stopBtn.addEventListener('click', function () {
clearInterval(timer);
timer = null; // Reset timer variable
});
resetBtn.addEventListener('click', function () {
clearInterval(timer);
timer = null; // Reset timer variable
hour = 0;
minute = 0;
second = 0;
count = 0;
updateDisplay();
});
function stopWatch() {
count++;
if (count == 100) {
second++;
count = 0;
}
if (second == 60) {
minute++;
second = 0;
}
if (minute == 60) {
hour++;
minute = 0;
second = 0;
}
updateDisplay();
}
function updateDisplay() {
document.getElementById('hr').textContent =
hour.toString().padStart(2, '0');
document.getElementById('min').textContent =
minute.toString().padStart(2, '0');
document.getElementById('sec').textContent =
second.toString().padStart(2, '0');
document.getElementById('count').textContent =
count.toString().padStart(2, '0');
}
</script>
</body>
</html>