clock-timer 0.2.7

A clock crate that offer a timer and a stopwatch to use in your apps
Documentation 
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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>Clock Timer WASM Demo</title>
    <style>
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            line-height: 1.6;
        }

        .container {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }

        .demo-box {
            flex: 1;
            min-width: 300px;
            border: 1px solid #ccc;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .time-display {
            font-size: 2.5rem;
            font-family: monospace;
            margin: 20px 0;
            text-align: center;
        }

        .controls {
            display: flex;
            gap: 10px;
        }

        button {
            padding: 8px 16px;
            border: none;
            border-radius: 4px;
            background-color: #0066cc;
            color: white;
            cursor: pointer;
            font-size: 1rem;
        }

        button:hover {
            background-color: #0052a3;
        }

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

        code {
            display: block;
            background: #f5f5f5;
            border: 1px solid #ddd;
            padding: 10px;
            margin: 10px 0;
            border-radius: 4px;
            overflow: auto;
        }
    </style>
</head>
<body>
    <h1>Clock Timer WASM Demo</h1>
    <p>This demo demonstrates the clock-timer WebAssembly module running in the browser.</p>

    <div class="container">
        <div class="demo-box">
            <h2>Timer</h2>
            <div id="timer-display" class="time-display">00:00:10</div>
            <div class="controls">
                <button id="start-timer">Start Timer (10s)</button>
            </div>
            <div id="timer-status"></div>
            <h3>Example Code:</h3>
            <code>
const timer = new Timer(0, 0, 10); // 10 second timer
timer.start().then(() => {
  console.log('Timer completed!');
});
            </code>
        </div>

        <div class="demo-box">
            <h2>Stopwatch</h2>
            <div id="stopwatch-display" class="time-display">00:00:00</div>
            <div class="controls">
                <button id="start-stopwatch">Start</button>
                <button id="stop-stopwatch" disabled>Stop</button>
                <button id="reset-stopwatch" disabled>Reset</button>
            </div>
            <div id="stopwatch-status"></div>
            <h3>Example Code:</h3>
            <code>
const stopwatch = new Stopwatch();
stopwatch.start();
// Later:
const elapsed = stopwatch.stop();
console.log(`Elapsed time: ${elapsed} seconds`);
stopwatch.reset();
            </code>
        </div>
    </div>

    <script type="module">
        // In a real project, you would use:
        // import { Timer, Stopwatch } from 'clock-timer';
        // For this demo, we're assuming the module is built to ../dist

        async function init() {
            try {
                // Dynamically import the wasm module
                const clockTimer = await import('../dist/clock_timer.js');
                const { Timer, Stopwatch } = clockTimer;

                // Timer Elements
                const timerDisplay = document.getElementById('timer-display');
                const startTimerBtn = document.getElementById('start-timer');
                const timerStatus = document.getElementById('timer-status');

                // Stopwatch Elements
                const stopwatchDisplay = document.getElementById('stopwatch-display');
                const startStopwatchBtn = document.getElementById('start-stopwatch');
                const stopStopwatchBtn = document.getElementById('stop-stopwatch');
                const resetStopwatchBtn = document.getElementById('reset-stopwatch');
                const stopwatchStatus = document.getElementById('stopwatch-status');

                // Format time display (adds leading zeros)
                function formatTimeDisplay(hours, minutes, seconds) {
                    return `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
                }

                // Timer functionality
                startTimerBtn.addEventListener('click', async () => {
                    // Create a 10 second timer
                    const timer = new Timer(0, 0, 10);
                    startTimerBtn.disabled = true;
                    timerStatus.textContent = 'Timer running...';

                    // Start time for client-side display updates
                    const startTime = Date.now();
                    const totalDuration = timer.duration;

                    // Update display every 100ms for smooth countdown
                    const interval = setInterval(() => {
                        const elapsed = Math.floor((Date.now() - startTime) / 1000);
                        const remaining = Math.max(0, totalDuration - elapsed);

                        const hours = Math.floor(remaining / 3600);
                        const minutes = Math.floor((remaining % 3600) / 60);
                        const seconds = remaining % 60;

                        timerDisplay.textContent = formatTimeDisplay(hours, minutes, seconds);
                    }, 100);

                    // Start the timer and wait for completion
                    try {
                        await timer.start();
                        timerStatus.textContent = 'Timer completed!';
                    } catch (error) {
                        timerStatus.textContent = `Error: ${error.message}`;
                        console.error('Timer error:', error);
                    } finally {
                        clearInterval(interval);
                        startTimerBtn.disabled = false;
                    }
                });

                // Stopwatch functionality
                let stopwatch = new Stopwatch();
                let stopwatchInterval;

                startStopwatchBtn.addEventListener('click', () => {
                    stopwatch.start();

                    startStopwatchBtn.disabled = true;
                    stopStopwatchBtn.disabled = false;
                    resetStopwatchBtn.disabled = true;

                    stopwatchStatus.textContent = 'Stopwatch running...';

                    // Update display every 100ms
                    stopwatchInterval = setInterval(() => {
                        // Get the current time directly from the stopwatch
                        // In a real implementation, we might need to track this client-side
                        // as the WASM module's internal time might only update every second
                        const time = stopwatch.current_time;

                        const hours = Math.floor(time / 3600);
                        const minutes = Math.floor((time % 3600) / 60);
                        const seconds = time % 60;

                        stopwatchDisplay.textContent = formatTimeDisplay(hours, minutes, seconds);
                    }, 100);
                });

                stopStopwatchBtn.addEventListener('click', () => {
                    const elapsed = stopwatch.stop();
                    clearInterval(stopwatchInterval);

                    stopwatchStatus.textContent = `Stopped at ${elapsed} seconds`;

                    startStopwatchBtn.disabled = false;
                    stopStopwatchBtn.disabled = true;
                    resetStopwatchBtn.disabled = false;
                });

                resetStopwatchBtn.addEventListener('click', () => {
                    stopwatch.reset();

                    const hours = 0;
                    const minutes = 0;
                    const seconds = 0;

                    stopwatchDisplay.textContent = formatTimeDisplay(hours, minutes, seconds);
                    stopwatchStatus.textContent = 'Stopwatch reset';

                    resetStopwatchBtn.disabled = true;
                });

            } catch (error) {
                console.error("Failed to initialize WASM module:", error);
                document.body.innerHTML += `
                    <div style="color: red; margin-top: 20px; padding: 10px; border: 1px solid red;">
                        <h2>Error Loading WASM Module</h2>
                        <p>${error.message}</p>
                        <p>Make sure you've built the WASM module with wasm-pack:</p>
                        <code>cd clock-timer && wasm-pack build --target web --out-dir dist</code>
                    </div>
                `;
            }
        }

        // Initialize the application
        init();
    </script>
</body>
</html>