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qr code scanner javascript

Ankur answered on March 9, 2023 Popularity 10/10 Helpfulness 5/10

answer qr code scanner javascript

related how to code QR and barcode scanner using HTML and Javascript

qr code scanner javascript

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<!DOCTYPE html>
<html>
  <head>
    <title>QR Code Scanner</title>
    <script src="https://cdn.jsdelivr.net/npm/jsqr@1.4.0/dist/jsQR.min.js"></script>
  </head>
  <body>
    <video id="video" width="300" height="200"></video>
    <canvas id="canvas" style="display: none;"></canvas>
    <div id="output"></div>

    <script>
      const video = document.getElementById('video');
      const canvas = document.getElementById('canvas');
      const outputDiv = document.getElementById('output');
      const constraints = { video: { facingMode: 'environment' } };

      navigator.mediaDevices.getUserMedia(constraints)
        .then(function(stream) {
          video.srcObject = stream;
          video.setAttribute('playsinline', true);
          video.play();
          requestAnimationFrame(tick);
        })
        .catch(function(error) {
          console.error(error);
        });

      function tick() {
        if (video.readyState === video.HAVE_ENOUGH_DATA) {
          canvas.width = video.videoWidth;
          canvas.height = video.videoHeight;
          const ctx = canvas.getContext('2d');
          ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
          const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
          const code = jsQR(imageData.data, imageData.width, imageData.height);
          if (code) {
            outputDiv.innerHTML = code.data;
          }
        }
        requestAnimationFrame(tick);
      }
    </script>
  </body>
</html>

I hope it will help you. Thank you.

For more refer link: https://www.programmingquest.com/2023/03/qr-scanner-using-javascript-and-jsqr.html

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: www.programmingquest.com

Tags: javascript qr-code

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Contributed on Mar 09 2023

Ankur

0 Answers Avg Quality 2/10

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how to code QR and barcode scanner using HTML and Javascript

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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 and Barcode Scanner</title>
</head>
<body>
    <h1>QR and Barcode Scanner</h1>
    <video id="preview"></video>
    <script src="instascan.min.js"></script>
    <script src="script.js"></script>
</body>
</html>

Popularity 7/10 Helpfulness 3/10 Language javascript

Source: chat.openai.com

Tags: barcode-scanner html h

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Contributed on Oct 03 2023

Powerful Petrel

0 Answers Avg Quality 2/10

qr code scanner javascript

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qr code scanner javascript

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how to code QR and barcode scanner using HTML and Javascript

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