QrCode.js

Javascript library to read QR codes in the browser

Installation

Note: The script creates a grobal variable named QrReader, in future versions this library will be compatible with different module loaders.

Using Bower

Install the library using:

bower install --save qrcode-reader.js

Use it from the html.

    <script src="bower_components/qrcodejs/dist/qrcode.js"></script>

Using Npm

npm i qrcode-reader.js

Use it from the html.

    <script src="node_modules/dist/qrcode.js"></script>

Manually including scripts

Download the javascript file from the next link and add it to your source:

https://raw.githubusercontent.com/IagoLast/qrcodejs/master/dist/qrcode.js

Simple example

This code creates a webcam canvas which border will turn green when a code is readed.

<html>

<head>
  <title>QRCode.js</title>
  <script type="text/javascript" src="dist/qrcode.js"></script>
</head>
<body>
  <video width="320px" height="240px" id="video" autoplay></video>
</body>
<script>
	function onSuccess(data) {
		document.getElementById('video').setAttribute("style", "border: 3px solid #52e250");
		console.log('Sucess:', data);
	}

	function onError(err) {
		console.error(err);
	}

	QrReader.getBackCamera().then(function(device) {
		new QrReader({
			sucessCallback: onSuccess, // Required
			errorCallback: onError, // Required
			videoSelector: '#video', // If not provided creates an invisible element and decode in background
			stopOnRead: true, // Default false, When true the video will stop once the first QR is read.
			deviceId: device.deviceId, // Id of the device used for recording video.
		});
	});
</script>

</html>

Author

@iagolast

License

MIT