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Cover image for How to make QR Scanner using Laravel & Javascript
Iqbal Syahrul Siddiq
Iqbal Syahrul Siddiq

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How to make QR Scanner using Laravel & Javascript

A QR Scanner is a device or software that can read and decode QR codes. QR codes are two-dimensional barcodes that can store a variety of information, such as text, URLs, contact information, and more.

QR code scanners can be used to scan QR codes in a variety of ways. For example, they can be used to:

  • Open a website in a web browser
  • Add a contact to a phone book
  • Pay for goods or services
  • Access loyalty programs
  • Log in to websites or applications
  • Share files

QR code scanners are available in a variety of forms, including:

  • Mobile phone apps
  • Point-of-sale (POS) devices
  • Wearable devices
  • Industrial scanners

QR code scanners are a convenient and efficient way to access information and perform tasks. They are becoming increasingly popular as QR codes become more widely used.

Here are some of the benefits of using a QR code scanner:

  • Convenient: QR code scanners can be used to scan QR codes quickly and easily.
  • Efficient: QR code scanners can save time and effort by eliminating the need to manually enter information.
  • Secure: QR codes can be encrypted to protect the information they contain.
  • Flexible: QR codes can be used to store a variety of information, making them versatile and adaptable.

If you are looking for a convenient and efficient way to access information and perform tasks, a QR code scanner is a good option to consider.

In this tutorial i will show you how to make QR Scanner web based using Laravel & Javascript, it's easy and simple. We will using Javascript code from JSQRScanner Github (https://github.com/jbialobr/JsQRScanner), and combine with Laravel.

  • Install new laravel project (in this tutorial we will using Laravel version 8)
composer create-project laravel/laravel:^8.0 example-app
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  • Open resources/views/welcome.blade.php, and modify code like bellow
<!DOCTYPE html>
<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>Laravel QR Scan Using Webcam</title>
        <!-- Fonts -->
        <link href="https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700&display=swap" rel="stylesheet">
        <!-- This script loads your compiled module.   -->
        <script type="text/javascript" src="{{ url('JS_Plugin/docs/jsPretty/jsqrscanner.nocache.js') }}"></script>

        <!-- Styles -->
        <style>
            /*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */html{line-height:1.15;-webkit-text-size-adjust:100%}body{margin:0}a{background-color:transparent}[hidden]{display:none}html{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji;line-height:1.5}*,:after,:before{box-sizing:border-box;border:0 solid #e2e8f0}a{color:inherit;text-decoration:inherit}svg,video{display:block;vertical-align:middle}video{max-width:100%;height:auto}.bg-white{--bg-opacity:1;background-color:#fff;background-color:rgba(255,255,255,var(--bg-opacity))}.bg-gray-100{--bg-opacity:1;background-color:#f7fafc;background-color:rgba(247,250,252,var(--bg-opacity))}.border-gray-200{--border-opacity:1;border-color:#edf2f7;border-color:rgba(237,242,247,var(--border-opacity))}.border-t{border-top-width:1px}.flex{display:flex}.grid{display:grid}.hidden{display:none}.items-center{align-items:center}.justify-center{justify-content:center}.font-semibold{font-weight:600}.h-5{height:1.25rem}.h-8{height:2rem}.h-16{height:4rem}.text-sm{font-size:.875rem}.text-lg{font-size:1.125rem}.leading-7{line-height:1.75rem}.mx-auto{margin-left:auto;margin-right:auto}.ml-1{margin-left:.25rem}.mt-2{margin-top:.5rem}.mr-2{margin-right:.5rem}.ml-2{margin-left:.5rem}.mt-4{margin-top:1rem}.ml-4{margin-left:1rem}.mt-8{margin-top:2rem}.ml-12{margin-left:3rem}.-mt-px{margin-top:-1px}.max-w-6xl{max-width:72rem}.min-h-screen{min-height:100vh}.overflow-hidden{overflow:hidden}.p-6{padding:1.5rem}.py-4{padding-top:1rem;padding-bottom:1rem}.px-6{padding-left:1.5rem;padding-right:1.5rem}.pt-8{padding-top:2rem}.fixed{position:fixed}.relative{position:relative}.top-0{top:0}.right-0{right:0}.shadow{box-shadow:0 1px 3px 0 rgba(0,0,0,.1),0 1px 2px 0 rgba(0,0,0,.06)}.text-center{text-align:center}.text-gray-200{--text-opacity:1;color:#edf2f7;color:rgba(237,242,247,var(--text-opacity))}.text-gray-300{--text-opacity:1;color:#e2e8f0;color:rgba(226,232,240,var(--text-opacity))}.text-gray-400{--text-opacity:1;color:#cbd5e0;color:rgba(203,213,224,var(--text-opacity))}.text-gray-500{--text-opacity:1;color:#a0aec0;color:rgba(160,174,192,var(--text-opacity))}.text-gray-600{--text-opacity:1;color:#718096;color:rgba(113,128,150,var(--text-opacity))}.text-gray-700{--text-opacity:1;color:#4a5568;color:rgba(74,85,104,var(--text-opacity))}.text-gray-900{--text-opacity:1;color:#1a202c;color:rgba(26,32,44,var(--text-opacity))}.underline{text-decoration:underline}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.w-5{width:1.25rem}.w-8{width:2rem}.w-auto{width:auto}.grid-cols-1{grid-template-columns:repeat(1,minmax(0,1fr))}@media (min-width:640px){.sm\:rounded-lg{border-radius:.5rem}.sm\:block{display:block}.sm\:items-center{align-items:center}.sm\:justify-start{justify-content:flex-start}.sm\:justify-between{justify-content:space-between}.sm\:h-20{height:5rem}.sm\:ml-0{margin-left:0}.sm\:px-6{padding-left:1.5rem;padding-right:1.5rem}.sm\:pt-0{padding-top:0}.sm\:text-left{text-align:left}.sm\:text-right{text-align:right}}@media (min-width:768px){.md\:border-t-0{border-top-width:0}.md\:border-l{border-left-width:1px}.md\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:1024px){.lg\:px-8{padding-left:2rem;padding-right:2rem}}@media (prefers-color-scheme:dark){.dark\:bg-gray-800{--bg-opacity:1;background-color:#2d3748;background-color:rgba(45,55,72,var(--bg-opacity))}.dark\:bg-gray-900{--bg-opacity:1;background-color:#1a202c;background-color:rgba(26,32,44,var(--bg-opacity))}.dark\:border-gray-700{--border-opacity:1;border-color:#4a5568;border-color:rgba(74,85,104,var(--border-opacity))}.dark\:text-white{--text-opacity:1;color:#fff;color:rgba(255,255,255,var(--text-opacity))}.dark\:text-gray-400{--text-opacity:1;color:#cbd5e0;color:rgba(203,213,224,var(--text-opacity))}.dark\:text-gray-500{--tw-text-opacity:1;color:#6b7280;color:rgba(107,114,128,var(--tw-text-opacity))}}
        </style>

        <style>
            body {
                font-family: 'Nunito', sans-serif;
            }
        </style>
    </head>
    <script> 
    if (location.protocol != 'https:') { 
      document.getElementById('secure-connection-message').style='display: block';
      }
      </script>  
    <body class="antialiased">
        <div class="relative flex items-top justify-center min-h-screen bg-gray-100 dark:bg-gray-900 sm:items-center py-4 sm:pt-0">
            <div class="max-w-6xl mx-auto sm:px-6 lg:px-8">
                <div class="flex justify-center pt-8 sm:justify-start sm:pt-0">
                    <svg viewBox="0 0 651 192" fill="none" xmlns="http://www.w3.org/2000/svg" class="h-16 w-auto text-gray-700 sm:h-20">
                        <g clip-path="url(#clip0)" fill="#EF3B2D">
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                        </g>
                    </svg>
                </div>

                <div class="mt-8 bg-white dark:bg-gray-800 overflow-hidden shadow sm:rounded-lg">
                    <div class="grid grid-cols-1 md:grid-cols-2">
                        <div id="scanner" class="p-6 border-t border-gray-200 dark:border-gray-700 md:border-t-0 md:border-l">

                        </div>
                        <div class="p-6 border-t border-gray-200 dark:border-gray-700 md:border-t-0 md:border-l">
                            <div class="flex items-center">
                                <svg fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" viewBox="0 0 24 24" class="w-8 h-8 text-gray-500"><path d="M3 9a2 2 0 012-2h.93a2 2 0 001.664-.89l.812-1.22A2 2 0 0110.07 4h3.86a2 2 0 011.664.89l.812 1.22A2 2 0 0018.07 7H19a2 2 0 012 2v9a2 2 0 01-2 2H5a2 2 0 01-2-2V9z"></path><path d="M15 13a3 3 0 11-6 0 3 3 0 016 0z"></path></svg>
                                <div class="ml-4 text-lg leading-7 font-semibold"><a href="" class="underline text-gray-900 dark:text-white">Laravel QR Scanner Using Webcam</a></div>
                            </div>

                            <div class="ml-12">
                                <div class="mt-2 text-gray-600 dark:text-gray-400 text-sm">
                                    A QR code scanner is a device or software that can read and decode QR codes. QR codes are two-dimensional barcodes that can store a variety of information, such as text, URLs, contact information, and more.
                                </div>
                            </div>
                            <div class="ml-12">
                                <textarea id="scannedTextMemo" cols="50" class="mt-2 form-control" rows="2" readonly></textarea>
                            </div>
                            <div class="ml-12">
                                <textarea id="scannedTextMemoHist" class="mt-2 form-control" value="" cols="50" rows="10" readonly></textarea>
                            </div>
                        </div>
                    </div>
                </div>

                <div class="flex justify-center mt-4 sm:items-center sm:justify-between">
                    <div class="ml-4 text-center text-sm text-gray-500 sm:text-right sm:ml-0">
                        Laravel v{{ Illuminate\Foundation\Application::VERSION }} (PHP v{{ PHP_VERSION }})
                    </div>
                </div>
            </div>
        </div>

<script type="text/javascript">
    function onQRCodeScanned(scannedText)
    {
        var scannedTextMemo = document.getElementById("scannedTextMemo");
        if(scannedTextMemo)
        {
            scannedTextMemo.value = scannedText;
        }
        var scannedTextMemoHist = document.getElementById("scannedTextMemoHist");
        if(scannedTextMemoHist)
        {
            scannedTextMemoHist.value = scannedTextMemoHist.value + '\n' + scannedText;
        }
    }

    function provideVideo()
    {
        var n = navigator;

        if (n.mediaDevices && n.mediaDevices.getUserMedia)
        {
          return n.mediaDevices.getUserMedia({
            video: {
              facingMode: "environment"
            },
            audio: false
          });
        } 

        return Promise.reject('Your browser does not support getUserMedia');
    }

    function provideVideoQQ()
    {
        return navigator.mediaDevices.enumerateDevices()
        .then(function(devices) {
            var exCameras = [];
            devices.forEach(function(device) {
            if (device.kind === 'videoinput') {
              exCameras.push(device.deviceId)
            }
         });

            return Promise.resolve(exCameras);
        }).then(function(ids){
            if(ids.length === 0)
            {
              return Promise.reject('Could not find a webcam');
            }

            return navigator.mediaDevices.getUserMedia({
                video: {
                  'optional': [{
                    'sourceId': ids.length === 1 ? ids[0] : ids[1]//this way QQ browser opens the rear camera
                    }]
                }
            });        
        });                
    }

    //this function will be called when JsQRScanner is ready to use
    function JsQRScannerReady()
    {
        //create a new scanner passing to it a callback function that will be invoked when
        //the scanner succesfully scan a QR code
        var jbScanner = new JsQRScanner(onQRCodeScanned);
        //var jbScanner = new JsQRScanner(onQRCodeScanned, provideVideo);
        //reduce the size of analyzed image to increase performance on mobile devices
        jbScanner.setSnapImageMaxSize(300);
        var scannerParentElement = document.getElementById("scanner");
        if(scannerParentElement)
        {
            //append the jbScanner to an existing DOM element
            jbScanner.appendTo(scannerParentElement);
        }        
    }
  </script>   
    </body>
</html>

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