zxing-typescript
Version:
TypeScript port of ZXing open-source, multi-format 1D/2D barcode image processing library
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HTML
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="author" content="Adrian Toșcă">
<meta name="description" content="Scan QR Code from Image with ZXing javascript library">
<title>ZXing | Scan QR Code from Image</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300italic,700,700italic">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/3.0.3/normalize.css">
<link rel="stylesheet" href="//cdn.rawgit.com/milligram/milligram/master/dist/milligram.min.css">
</head>
<body>
<main class="wrapper">
<section class="container" id="demo-content">
<h1 class="title">Scan QR Code from Image</h1>
<p>This example shows how to scan a QR code with ZXing javascript library from an image. The example decodes from the <code>src</code> in <code>img</code> tag, however is also possible to decode directly from an url without an <code>img</code> tag.</p>
<div>
<a class="button" id="decodeButton">Decode</a>
</div>
<div>
<img id="img" src="qrcode-image.png" width="200" height="300" style="border: 1px solid gray"></img>
</div>
<label>Result:</label>
<blockquote>
<p id="result"></p>
</blockquote>
<p>See the <a href="https://github.com/aleris/zxing-typescript/tree/master/docs/examples/qr-image/">source code</a> for this example.</p>
</section>
<footer class="footer">
<section class="container">
<p>ZXing TypeScript Demo. Licensed under the <a target="_blank" href="https://github.com/aleris/zxing-typescript#license" title="Apache License, Version 2.0">Apache License, Version 2.0</a>.</p>
</section>
</footer>
</main>
<script type="text/javascript" src="../zxing.qrcodereader.min.js"></script>
<script type="text/javascript">
window.addEventListener('load', function() {
const codeReader = new ZXing.BrowserQRCodeReader('video')
console.log('ZXing code reader initialized')
document.getElementById('decodeButton').addEventListener('click', () => {
const img = document.getElementById('img')
codeReader.decodeFromImage(img).then((result) => {
console.log(result)
document.getElementById('result').textContent = result.text
}).catch((err) => {
console.error(err)
document.getElementById('result').textContent = err
})
console.log(`Started decode for image from ${img.src}`)
})
})
</script>
</body>
</html>