Example of WeChat QR code image generator implemented in JavaScript

jquery.qrcode.js is a jquery plug-in that can generate matrix QR code QRCode on the client. It can be used to easily generate 2D barcodes on the page.

QRCode.js

QRCode.js is a javascript implementation library for QR code (QRCode) production and generation. QRCode.js has good cross-browser compatibility (the higher version uses HTML5 Canvas, and the lower version IE uses table elements to draw), and QRCode.js has no dependencies. Just need to quote a JS.

This plug-in can be used independently, and the size is relatively small, less than 4kb after using gzip compression. Because it is a barcode generated directly on the client, there is no image downloading process and it can be generated quickly. It is encapsulated based on a multi-language class library and does not rely on other additional services.

Note* It also supports using SVG to draw QR codes

Basic use

Note* First you need to add qrcode.js Reference and create an empty DIV

<div id="qrcode"></div> <script type="text/javascript"> new QRCode(document.getElementById("qrcode"), "http://jindo.dev.naver.com/collie"); </script>

There are more parameters to choose from

var qrcode = new QRCode("test", {
 text: "http://jindo.dev.naver.com/collie",
 width: 128,
 height: 128,
 colorDark : "#000000",
 colorLight : "#ffffff",
 correctLevel : QRCode.CorrectLevel.H
});

You can dynamically change the QR code image, Very fast

qrcode.clear();
qrcode.makeCode("http://naver.com");

Browser support

Almost supports all browsers: IE6~10, Chrome, Firefox, Safari, Opera, Mobile Safari, Android , Windows Mobile.

DEMO address: http://davidshimjs.github.io/qrcodejs

Note* There is a server side that uses Node.JS to generate 2D A library of code pictures. Interested students can also study it: https://github.com/soldair/node-qrcode

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