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<!doctype html>
<html lang="en-US" xmlns:fb="https://www.facebook.com/2008/fbml" xmlns:addthis="https://www.addthis.com/help/api-spec" prefix="og: http://ogp.me/ns#" class="no-js">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>How to use Instascan an HTML5 QR scanner</title>
<link rel="shortcut icon" href="https://learncodeweb.com/demo/favicon.ico">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.6.3/css/all.css" integrity="sha384-UHRtZLI+pbxtHCWp1t77Bi1L4ZtiqrqD80Kn4Z8NTSRyMA2Fd33n5dQ8lWUE00s/" crossorigin="anonymous">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<script>
(adsbygoogle = window.adsbygoogle || []).push({
google_ad_client: "ca-pub-6724419004010752",
enable_page_level_ads: true
});
</script>
<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-131906273-1"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-131906273-1');
</script>
</head>
<body>
<script src="https://code.jquery.com/jquery-3.4.1.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
<div class="bg-light border-bottom shadow-sm sticky-top">
<div class="container">
<header class="blog-header py-1">
<nav class="navbar navbar-expand-lg navbar-light bg-light"> <a class="navbar-brand text-muted p-0 m-0" href="https://learncodeweb.com"><img src='https://learncodeweb.com/wp-content/uploads/2019/01/logo.png' alt='LearnCodeWeb'></a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li itemscope="itemscope" itemtype="https://www.schema.org/SiteNavigationElement" id="menu-item-17" class="active nav-item"><a title="Home" href="https://learncodeweb.com/" class="nav-link">Home</a></li>
<li itemscope="itemscope" itemtype="https://www.schema.org/SiteNavigationElement" id="menu-item-16" class="nav-item"><a title="Web Development" href="https://learncodeweb.com/learn/web-development/" class="nav-link">Web Development</a></li>
<li itemscope="itemscope" itemtype="https://www.schema.org/SiteNavigationElement" id="menu-item-558" class="nav-item"><a title="PHP" href="https://learncodeweb.com/learn/php/" class="nav-link">PHP</a></li>
<li itemscope="itemscope" itemtype="https://www.schema.org/SiteNavigationElement" id="menu-item-14" class="nav-item"><a title="Bootstrap" href="https://learncodeweb.com/learn/bootstrap-framework/" class="nav-link">Bootstrap</a></li>
<li itemscope="itemscope" itemtype="https://www.schema.org/SiteNavigationElement" id="menu-item-559" class="nav-item"><a title="WordPress" href="https://learncodeweb.com/learn/wordpress/" class="nav-link">WordPress</a></li>
<li itemscope="itemscope" itemtype="https://www.schema.org/SiteNavigationElement" id="menu-item-15" class="nav-item"><a title="Snippets" href="https://learncodeweb.com/learn/snippets/" class="nav-link">Snippets</a></li>
</ul>
<form method="get" action="https://learncodeweb.com" class="form-inline my-2 my-lg-0">
<div class="input-group input-group-md">
<input type="text" class="form-control search-width" name="s" id="search" value="" placeholder="Search..." aria-label="Search">
<div class="input-group-append">
<button type="submit" class="btn btn-primary" id="searchBtn"><i class="fa fa-search"></i></button>
</div>
</div>
</form>
</div>
</nav>
</header>
</div> <!--/.container-->
</div>
<div class="container-fluid">
<div class="row">
<div class="col-sm-3">
<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- demo left sidebar -->
<ins class="adsbygoogle"
style="display:block"
data-ad-client="ca-pub-6724419004010752"
data-ad-slot="7706376079"
data-ad-format="auto"
data-full-width-responsive="true"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>
</div>
<div class="col">
<script src="https://rawgit.com/schmich/instascan-builds/master/instascan.min.js"></script>
<h1><a href="https://learncodeweb.com/phonegap/how-to-use-instascan-an-html5-qr-scanner/">How to use Instascan an HTML5 QR scanner</a></h1>
<div class="col-sm-12">
<video id="preview" class="p-1 border" style="width:100%;"></video>
</div>
<script type="text/javascript">
var scanner = new Instascan.Scanner({ video: document.getElementById('preview'), scanPeriod: 5, mirror: false });
scanner.addListener('scan',function(content){
alert(content);
//window.location.href=content;
});
Instascan.Camera.getCameras().then(function (cameras){
if(cameras.length>0){
scanner.start(cameras[0]);
$('[name="options"]').on('change',function(){
if($(this).val()==1){
if(cameras[0]!=""){
scanner.start(cameras[0]);
}else{
alert('No Front camera found!');
}
}else if($(this).val()==2){
if(cameras[1]!=""){
scanner.start(cameras[1]);
}else{
alert('No Back camera found!');
}
}
});
}else{
console.error('No cameras found.');
alert('No cameras found.');
}
}).catch(function(e){
console.error(e);
alert(e);
});
</script>
<div class="btn-group btn-group-toggle mb-5" data-toggle="buttons">
<label class="btn btn-primary active">
<input type="radio" name="options" value="1" autocomplete="off" checked> Front Camera
</label>
<label class="btn btn-secondary">
<input type="radio" name="options" value="2" autocomplete="off"> Back Camera
</label>
</div>
</div>
<div class="col-sm-3">
<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- demo left sidebar -->
<ins class="adsbygoogle"
style="display:block"
data-ad-client="ca-pub-6724419004010752"
data-ad-slot="7706376079"
data-ad-format="auto"
data-full-width-responsive="true"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>
</div>
</div>
</div>
</body>
</html>