Qrcode.js use JS two-dimensional code generator __JS

Source: Internet
Author: User
Tags generator

Content Source: http://www.runoob.com/w3cnote/javascript-qrcodejs-library.html

Qrcode.js is a JavaScript library for generating two-dimensional code. This is done primarily by getting the tag of the DOM and drawing it through the HTML5 Canvas, without relying on any library. Basic Usage

<div id= "QRCode" ></div>
<script type= "Text/javascript" >
new QRCode ( document.getElementById ("QRCode"), "http://www.runoob.com");  Set up a link to generate a two-dimensional code

Or use some optional parameter settings:

var qrcode = new QRCode ("test", {
    text: "Http://www.runoob.com",
    colordark: "# 000000 ",
    colorlight:" #ffffff ",

Also we can use the following methods:

Qrcode.clear (); Clear code
qrcode.makecode ("http://www.w3cschool.cc");//Generate another two-dimensional code
Browser Support

Browsers that support the library are: ie6~10, Chrome, Firefox, Safari, Opera, Mobile Safari, Android, Windows Mobile, and more. Instance Code HTML Code

<input id= "text" type= "text" value= "http://www.runoob.com"/><br/> <div id=
"QRCode" ></div >
CSS Code
#qrcode {
JavaScript Code
var qrcode = new QRCode ("QRCode");

function Makecode () {      
    var eltext = document.getElementById ("text");
    if (!eltext.value) {
        alert ("Input a Text");
        Eltext.focus ();
    Qrcode.makecode (Eltext.value);

Makecode ();

$ ("#text").
On ("Blur", function () {
    makecode ();
On ("KeyDown", function (e) {
    if (E.keycode = =) {
        makecode ();

Try» Download Resources

QRCode Library and instance download:qrcodejs-04f46c6.zip

Github Address:Https://github.com/davidshimjs/qrcodejs

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