relaxdiego.github.com/camera.html at master · relaxdiego/relaxdiego.github.com · 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>QR Scanner</title>

    <!-- Load jsQR -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jsQR/1.4.0/jsQR.min.js"></script>

    <style>
        body {
            margin: 0;
            padding: 20px;
            background: #f0f0f0;
            font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

        #container {
            max-width: 800px;
            margin: 0 auto;
        }

        #videoContainer {
            position: relative;
            width: 100%;
            margin: 20px 0;
        }

        #video {
            width: 100%;
            max-width: 640px;
            background: black;
        }

        #canvas {
            display: none;
        }

        #startButton {
            display: block;
            width: 100%;
            padding: 10px;
            background: #007bff;
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            cursor: pointer;
        }

        #startButton:disabled {
            background: #ccc;
        }

        #output {
            margin-top: 20px;
            padding: 10px;
            background: white;
            border-radius: 5px;
        }
    </style>
</head>
<body>
    <div id="container">
        <button id="startButton">Start Camera</button>
        <div id="videoContainer">
            <video id="video" playsinline></video>
            <canvas id="canvas"></canvas>
        </div>
        <div id="output"></div>
    </div>

    <script>
        let video = document.getElementById('video');
        let canvas = document.getElementById('canvas');
        let ctx = canvas.getContext('2d');
        let output = document.getElementById('output');
        let startButton = document.getElementById('startButton');

        startButton.onclick = async () => {
            try {
                const stream = await navigator.mediaDevices.getUserMedia({
                    video: { facingMode: 'environment' }
                });

                video.srcObject = stream;
                video.setAttribute('playsinline', true); // required for iOS
                video.play();

                requestAnimationFrame(tick);
                startButton.disabled = true;
                output.textContent = 'Camera started. Scanning for QR codes...';
            } catch (err) {
                console.error(err);
                output.textContent = `Error: ${err.message}`;
            }
        };

        function tick() {
            if (video.readyState === video.HAVE_ENOUGH_DATA) {
                canvas.width = video.videoWidth;
                canvas.height = video.videoHeight;
                ctx.drawImage(video, 0, 0);

                const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
                const code = jsQR(imageData.data, imageData.width, imageData.height);

                if (code) {
                    output.textContent = `Found QR code: ${code.data}`;
                }
            }

            requestAnimationFrame(tick);
        }
    </script>
</body>
</html>