indexqr.html

<!DOCTYPE html>
<html>

<head>
  <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  <meta content="width=device-width,initial-scale=1,user-scalable=no" name="viewport">

  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <title>code</title>
  <script src="js/lib/html5-qrcode.min.js"></script>
</head>

<body>
  <div id="qr-reader" style="width:500px"></div>
    <div id="qr-reader-results"></div>
  <script>
    function docReady(fn) {
    // see if DOM is already available
    if (document.readyState === "complete" || document.readyState === "interactive") {
        // call on next available tick
        setTimeout(fn, 1);
    } else {
        document.addEventListener("DOMContentLoaded", fn);
    }
} 

docReady(function() {
    var resultContainer = document.getElementById('qr-reader-results');
    var lastResult, countResults = 0;
    
    var html5QrcodeScanner = new Html5QrcodeScanner(
        "qr-reader", { fps: 10, qrbox: 250 });
    
    function onScanSuccess(decodedText, decodedResult) {
        if (decodedText !== lastResult) {
            ++countResults;
            lastResult = decodedText;
            console.log(`Scan result = ${decodedText}`, decodedResult);
 
            resultContainer.innerHTML += `<div>[${countResults}] - ${decodedText}</div>`;
            
            // Optional: To close the QR code scannign after the result is found
            html5QrcodeScanner.clear();
        }
    }
    
    // Optional callback for error, can be ignored.
    function onScanError(qrCodeError) {
        // This callback would be called in case of qr code scan error or setup error.
        // You can avoid this callback completely, as it can be very verbose in nature.
    }
    
    html5QrcodeScanner.render(onScanSuccess, onScanError);
});
    
  </script>
</body>

</html>