projects-html-css-js-/stopwatch(css+js).html at main · NAVIN2709/projects-html-css-js- · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Stopwatch</title>
    <style>
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: #f4f4f4;
        }

        .stopwatch {
            background-color: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
            text-align: center;
        }

        .time-display {
            font-size: 3em;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
        }

        .button {
            font-size: 1.5em;
            padding: 15px 30px;
            border: none;
            border-radius: 5px;
            background-color: #4caf50;
            color: white;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .button:hover {
            background-color: #45a049;
        }

        .button:disabled {
            background-color: #ddd;
            cursor: not-allowed;
        }

        .reset-button {
            background-color: #f44336;
        }

        .reset-button:hover {
            background-color: #e53935;
        }
    </style>
</head>
<body>

    <div class="stopwatch">
        <div id="time-display" class="time-display">00:00:00.00</div>
        <div class="buttons">
            <button id="start-stop" class="button" onclick="startStop()">Start</button>
            <button id="reset" class="button reset-button" onclick="reset()">Reset</button>
        </div>
    </div>

    <script>
        let timer;
        let isRunning = false;
        let seconds = 0;
        let minutes = 0;
        let hours = 0;
        let milliseconds = 0;

        function formatTime() {
            const pad = (num) => num < 10 ? '0' + num : num;
            const padMilliseconds = (num) => num < 10 ? '0' + num : num;
            return `${pad(hours)}:${pad(minutes)}:${pad(seconds)}.${padMilliseconds(milliseconds)}`;
        }

        function updateTimeDisplay() {
            document.getElementById("time-display").innerText = formatTime();
        }

        function startStop() {
            if (isRunning) {
                clearInterval(timer);
                document.getElementById("start-stop").innerText = "Start";
            } else {
                timer = setInterval(() => {
                    milliseconds++;
                    if (milliseconds === 100) {
                        milliseconds = 0;
                        seconds++;
                        if (seconds === 60) {
                            seconds = 0;
                            minutes++;
                            if (minutes === 60) {
                                minutes = 0;
                                hours++;
                            }
                        }
                    }
                    updateTimeDisplay();
                }, 10);  // Update every 10 milliseconds
                document.getElementById("start-stop").innerText = "Stop";
            }
            isRunning = !isRunning;
        }

        function reset() {
            clearInterval(timer);
            isRunning = false;
            milliseconds = 0;
            seconds = 0;
            minutes = 0;
            hours = 0;
            updateTimeDisplay();
            document.getElementById("start-stop").innerText = "Start";
        }
    </script>

</body>
</html>