Generate Random QR Code OnClick Using qrcode.js - javascript

I am using qrcode.js for generating qrcode. I want to generate random QR code every time I click into add new tab instead of add new qr code. I created a code for a random number but when I try to add onclick function it add new not to random it.
JSFIDDLE: https://jsfiddle.net/aice09/L8pp9336/
GITHUB: https://github.com/Ailyn09/project102/blob/master/qrcode.html
CODEPEN: https://codepen.io/aice09/pen/Ogqajr
$('#lithird').click(function() {
var qrcode = new QRCode("qrcode");
function makeCode() {
function randomNumber(len) {
var randomNumber;
var n = '';
for (var count = 0; count < len; count++) {
randomNumber = Math.floor(Math.random() * 10);
n += randomNumber.toString();
}
return n;
}
var value = randomNumber(13);
var elText = value;
qrcode.makeCode(elText);
}
makeCode();
});
#qrcode {
width:160px;
height:160px;
margin-top:15px;
}
<script src="https://code.jquery.com/jquery-1.12.3.min.js"></script>
<script src="https://cdn.rawgit.com/davidshimjs/qrcodejs/gh-pages/qrcode.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="container-fluid" id="main">
<ul class="nav nav-tabs" role="tablist">
<li role="presentation" id="lifirst" class="active">List</li>
<li role="presentation" id="lithird"><a href="#editable" aria-controls="editable" role="tab" data-toggle="tab" onclick='transfer_new()'>Add New</a></li>
</ul>
<!--/ Nav tabs /-->
<!-- Tab panes -->
<div class="tab-content">
<div role="tabpanel" class="tab-pane active" id="home" style="margin-top: 10px;">
IN THE NEXT TABA THE AR CODE
</div>
<div role="tabpanel" class="tab-pane" id="editable">
<div class="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-md-offset-4 col-lg-offset-4">
<div id="qrcode"></div>
</div>=
</div>
</div>
</div>

Try adding $('#qrcode').html(''); as the first item in the .click(function(){}
Like this:
$('#lithird').click(function(){
$('#qrcode').html(''); // <---Add this, which should clear it out on the next click
var qrcode = new QRCode("qrcode");
function makeCode () {
function randomNumber(len) {
var randomNumber;
var n = '';
for(var count = 0; count < len; count++) {
randomNumber = Math.floor(Math.random() * 10);
n += randomNumber.toString();
}
return n;
}
var value = randomNumber(13);
var elText = value;
qrcode.makeCode(elText);
}
makeCode();
});
Codepen for full review

You were missing a function transfer_new defined in your onclick that was causing a JavaScript error.
function transfer_new() {
$('#qrcode').html('');
}
$('#lithird').click(function() {
var qrcode = new QRCode("qrcode");
function makeCode() {
function randomNumber(len) {
var randomNumber;
var n = '';
for (var count = 0; count < len; count++) {
randomNumber = Math.floor(Math.random() * 10);
n += randomNumber.toString();
}
return n;
}
var value = randomNumber(13);
var elText = value;
qrcode.makeCode(elText);
}
makeCode();
});
#qrcode {
width:160px;
height:160px;
margin-top:15px;
}
#qrcode img {
margin: 15px;
border: 5px solid black;
}
<script src="https://code.jquery.com/jquery-1.12.3.min.js"></script>
<script src="https://cdn.rawgit.com/davidshimjs/qrcodejs/gh-pages/qrcode.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="container-fluid" id="main">
<ul class="nav nav-tabs" role="tablist">
<li role="presentation" id="lifirst" class="active">List</li>
<li role="presentation" id="lithird"><a href="#editable" aria-controls="editable" role="tab" data-toggle="tab" onclick='transfer_new()'>Add New</a></li>
</ul>
<!--/ Nav tabs /-->
<!-- Tab panes -->
<div class="tab-content">
<div role="tabpanel" class="tab-pane active" id="home" style="margin-top: 10px;">
IN THE NEXT TABA THE AR CODE
</div>
<div role="tabpanel" class="tab-pane" id="editable">
<div class="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-md-offset-4 col-lg-offset-4">
<div id="qrcode"></div>
</div>=
</div>
</div>
</div>

Just clear the content before generating new
function randomNumber(len) {
var randomNumber;
var n = '';
for (var count = 0; count < len; count++) {
randomNumber = Math.floor(Math.random() * 10);
n += randomNumber.toString();
}
return n;
}
$('#lithird').click(function() {
var value = randomNumber(13);
$("#qrcode").html("");
var qrcode = new QRCode("qrcode");
qrcode.makeCode(value);
});
#qrcode {
width:160px;
height:160px;
margin-top:15px;
}
<script src="https://code.jquery.com/jquery-1.12.3.min.js"></script>
<script src="https://cdn.rawgit.com/davidshimjs/qrcodejs/gh-pages/qrcode.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="container-fluid" id="main">
<ul class="nav nav-tabs" role="tablist">
<li role="presentation" id="lifirst" class="active">List</li>
<li role="presentation" id="lithird"><a href="#editable" aria-controls="editable" role="tab" data-toggle="tab" >Add New</a></li>
</ul>
<!--/ Nav tabs /-->
<!-- Tab panes -->
<div class="tab-content">
<div role="tabpanel" class="tab-pane active" id="home" style="margin-top: 10px;">
IN THE NEXT TABA THE AR CODE
</div>
<div role="tabpanel" class="tab-pane" id="editable">
<div class="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-md-offset-4 col-lg-offset-4">
<div id="qrcode"></div>
</div>
</div>
</div>
</div>

$(".generatetext").click(function(e) {
e.preventDefault();
var x = randomNumber(13);
$('#output').html('').qrcode(x);
});
function randomNumber(len) {
var randomNumber;
var n = '';
for (var count = 0; count < len; count++) {
randomNumber = Math.floor(Math.random() * 10);
n += randomNumber.toString();
}
return n;
}
#output{border:1px solid #eee;min-height:200px;width:200px;}
.container{padding:10px;}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.qrcode/1.0/jquery.qrcode.min.js"></script>
<div class="container">
<form class="form-inline">
<div class="form-group">
<button class="btn btn-primary generatetext">Generate Random QR Code</button>
</div>
</form>
<div class="container">
<div id="output" class="text-center"></div>
</div>
</div>

$('#lithird').click(function() {
var qrcode = new QRCode("qrcode");
function makeCode() {
function randomNumber(len) {
var randomNumber;
var n = '';
for (var count = 0; count < len; count++) {
randomNumber = Math.floor(Math.random() * 10);
n += randomNumber.toString();
}
return n;
}
var value = randomNumber(13);
var elText = value;
qrcode.makeCode(elText);
}
makeCode();
});
#qrcode {
width:160px;
height:160px;
margin-top:15px;
}
<script src="https://code.jquery.com/jquery-1.12.3.min.js"></script>
<script src="https://cdn.rawgit.com/davidshimjs/qrcodejs/gh-pages/qrcode.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="container-fluid" id="main">
<ul class="nav nav-tabs" role="tablist">
<li role="presentation" id="lifirst" class="active">List</li>
<li role="presentation" id="lithird"><a href="#editable" aria-controls="editable" role="tab" data-toggle="tab" onclick='transfer_new()'>Add New</a></li>
</ul>
<!--/ Nav tabs /-->
<!-- Tab panes -->
<div class="tab-content">
<div role="tabpanel" class="tab-pane active" id="home" style="margin-top: 10px;">
IN THE NEXT TABA THE AR CODE
</div>
<div role="tabpanel" class="tab-pane" id="editable">
<div class="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-md-offset-4 col-lg-offset-4">
<div id="qrcode"></div>
</div>=
</div>
</div>
</div>

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My Code:
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var inp = document.getElementById('usr').value;
var list = document.getElementById('lista1');
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When I click button on same line with li I would like li to disappear.
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li.setAttribute("id",i);
}
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var button = document.createElement("button");
button.innerHTML = "Delete";
button.setAttribute("class","btn btn-primary");
button.setAttribute("onclick","sterge()");
button.setAttribute("class","ste");
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}
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$('body').on('click', '.ste', function(){
$(this).parent().remove();
});
}
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I'm apologize. I'm not good at English.
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If i cut out ckeditor this code is work and attribute id textarea is
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I'm complete.
I add my code
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Error in d3.js using jQuery and dc.js

I'm new in programming, and I'm trying to implement a search button that can enable me to filter datas .
I have on my serv a JSON data at the url /tweets_complet . Then I want to get another JSON which depends on the input from the search button . Once I have the two JSON, I wrote some code, which I think is not important .
Here is the js code :
function main(){
$.getJSON("/tweets_complet", insererDonneesJson);}
function insererDonneesJson(data){
$('button').on('click', get_data);
function get_data() {
var cashtagg=$('#cash').val();
$.getJSON("/"+cashtagg, filter);
function filter(data2) {
//Tweets datas
var tweets = data;
var dateFormat = d3.time.format("%Y-%m-%d %H:%M:%S");
tweets.forEach(function(d) {
d["cleandate"] = dateFormat.parse(d["cleandate"]);
d["cleandate"].setSeconds(0);
});
//Create a Crossfilter instance
var ndx = crossfilter(tweets);
//Define Dimensions
var cleandateDim = ndx.dimension(function(d) { return d["cleandate"]; });
var sentimentDim=ndx.dimension(function(d) { return d["sentiment"]; });
var bnscoreDim=ndx.dimension(function(d) { return d["bnscore"]; });
var tickerDim=ndx.dimension(function(d) { return d["collection_name"];});
var newTickerDim = tickerDim.filter(cashtagg);
//Calculate metrics
var numTweetsByTicker=newTickerDim.group()
var numTweetsByDate = cleandateDim.group();
var numTweetsByBnscore = bnscoreDim.group();
var totalScoreByDate = cleandateDim.group().reduceSum(function(d) {
return d["sentiment"]*10/(numTweetsByDate.size());})
var all = ndx.groupAll();
var numTweetsBySentiment = sentimentDim.group();
//Define values (to be used in charts)
var minDate = cleandateDim.bottom(1)[0]["cleandate"];
var maxDate = cleandateDim.top(1)[0]["cleandate"];
//Datas cashtag
var datas = data2;
var dateFormatO = d3.time.format("%Y-%m-%d");
datas.forEach(function(d) {
d["Date"] = dateFormatO.parse(d["Date"]);
});
// Create a Crossfilter instance
var ndxO = crossfilter(datas);
// Define Dimensions
var dateDimO = ndxO.dimension(function(d) { return d["Date"]; });
var volumeDimO=ndxO.dimension(function(d) { return d["Volume"]; });
var scoreDimO=ndxO.dimension(function(d) { return d["Low"]; });
// Calculate metrics
var groupeVolumeO = dateDimO.group().reduceSum(function(d) { return d["Volume"]/10000000;});
var groupeScoreO = dateDimO.group().reduceSum(function(d) { return d["Low"];});
var allO = ndxO.groupAll();
// Define values (to be used in charts)
var minDateO = dateDimO.bottom(1)[0]["Date"];
var maxDateO = dateDimO.top(1)[0]["Date"];
var minVolumeO = (volumeDimO.bottom(1)[0]["Volume"])/10000000;
var maxVolumeO = (volumeDimO.top(1)[0]["Volume"])/10000000;
var minScoreO = scoreDimO.bottom(1)[0]["Low"];
var maxScoreO = scoreDimO.top(1)[0]["Low"];
//Charts
var timeChart = dc.barChart("#time-chart");
var pieChart= dc.pieChart("#pie-chart")
var numberTweetsND = dc.numberDisplay("#number-tweets-nd");
var hitslineChart = dc.lineChart("#chart-line-hitsperday");
var shareChart = dc.lineChart("#share-chart");
var volumeChart = dc.lineChart("#volume-chart");
numberTweetsND
.formatNumber(d3.format("d"))
.valueAccessor(function(d){return d; })
.group(all);
timeChart
.width(800)
.height(160)
.margins({top: 10, right: 50, bottom: 30, left: 50})
.dimension(cleandateDim)
.group(numTweetsByDate)
.transitionDuration(500)
.x(d3.time.scale().domain([minDate, maxDate]))
.elasticY(true)
.xAxisLabel("Day")
.yAxis().ticks(8);
pieChart.width(350)
.height(330)
.dimension(sentimentDim)
.group(numTweetsBySentiment)
.colors(['red','black','green']);
hitslineChart
.width(600).height(330)
.dimension(cleandateDim)
.group(totalScoreByDate)
.x(d3.time.scale().domain([minDate,maxDate]));
volumeChart
.width(800).height(330)
.dimension(dateDimO)
.group(groupeVolumeO)
.x(d3.time.scale().domain([minDateO,maxDateO]));
// .y(d3.scale.linear().domain([minVolumeO,maxVolumeO]));
shareChart
.width(800).height(330)
.dimension(dateDimO)
.group(groupeScoreO)
.x(d3.time.scale().domain([minDateO,maxDateO]));
// .y(d3.scale.linear().domain([minScoreO,maxScoreO]));
dc.renderAll();
}}};
$(document).on('ready', main);
And the HTML code :
<!DOCTYPE html>
<html>
<head>
<title>Dashboard</title>
<link rel="stylesheet" href="./static/lib/css//bootstrap.min.css">
<link rel="stylesheet" href="./static/lib/css/keen-dashboards.css">
<link rel="stylesheet" href="./static/lib/css/dc.css">
<link rel="stylesheet" href="./static/css/custom.css">
</head>
<body class="application">
<div class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="./">InTwittiv</a>
</div>
<div>
<ul class="nav navbar-nav">
<li class="active">Description</li>
<li>Analyse</li>
</ul>
<div class="collapse navbar-collapse navbar-ex1-collapse">
<!-- <a href="#" class="btn btn-default btn-lg"><span class="glyphicon glyphicon-search"></span>
<div class="col-sm-10">
<input type="text" class="form-control" id="cashtag" placeholder="Cashtag">
</div>
</a> -->
<div class="col-sm-3 col-md-3 pull-right">
<div class="form-group">
<input id="cash" type="text" placeholder="Change Cashtag here" >
<button class="btn btn-sm btn-success">Chercher</button>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row">
<div class="col-sm-6">
<div class="row">
<div class="col-sm-12">
<div class="chart-wrapper">
<div class="chart-title">
Tweet Volume
</div>
<div class="chart-stage">
<div id="time-chart"></div>
</div>
</div>
</div>
<div class="col-sm-6">
<div class="chart-wrapper">
<div class="chart-title">
Sentiment repartition
</div>
<div class="chart-stage">
<div id="pie-chart"></div>
</div>
</div>
</div>
<div class="col-sm-6">
<div class="chart-wrapper">
<div class="chart-title">
Sentiment repartition
</div>
<div class="chart-stage">
<div id="chart-line-hitsperday"></div>
</div>
</div>
</div>
<div class="col-sm-3">
<div class="chart-wrapper">
<div class="chart-title">
Total nb of tweets
</div>
<div class="chart-stage">
<div id="number-tweets-nd"></div>
</div>
</div>
</div>
</div>
</div>
<div class="col-sm-6">
<div class="row">
<div class="col-sm-12">
<div class="chart-wrapper">
<div class="chart-title">
Volume (*10^6)
</div>
<div class="chart-stage">
<div id="volume-chart"></div>
</div>
</div>
</div>
<div class="col-sm-12">
<div class="chart-wrapper">
<div class="chart-title">
Share Price
</div>
<div class="chart-stage">
<div id="share-chart"></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<hr>
<p class="small text-muted">Built by Keyrus Capital Markets</p>
</div>
<script src="http://code.jquery.com/jquery.min.js"></script>
<script src="./static/lib/js/bootstrap.min.js"></script>
<script src="./static/lib/js/crossfilter.js"></script>
<script src="./static/lib/js/d3.js"></script>
<script src="./static/lib/js/dc.js"></script>
<script src="./static/lib/js/queue.js"></script>
<script src="./static/lib/js/d3.layout.cloud.js"></script>
<script src="./static/lib/js/keen.min.js"></script>
<script src='./static/js/graph2.js' type='text/javascript'></script>
</body>
</html>
When I run the serv, I can enter a value in the input (FB for example) and it works . However, from here, I can't change the "cash" value into something else like AAPL since I get the error
Uncaught TypeError: undefined is not a function
d3.js:2716
This line is :
var n = d3_time_numberRe.exec(string.slice(i, i + 4));
I have no clue about the reason of the issue since I'm not familiar with $ and buttons...
Any help would be appreciated :)

js slideshow classname property of null

I am making a slideshow for a website i am making.
but my slideshow keeps getting error
Cannot set property 'className' of null
here is my code:
window.onload=function(){
var slideshow = document.getElementsByClassName('slideshow').item(0),
train = slideshow.getElementsByClassName('train').item(0),
lists = document.getElementsByClassName('btns').item(0).getElementsByClassName('btn'),
currentSlide = 0;
(go2slide = function (n) {
if(n>lists.length-1) n=0;
if(n<0) n=lists.length-1;
train.style.left=(-310*n)+'px';
lists.item(currentSlide).className = '';
lists.item(n).className = 'active';
currentSlide=n;
})(0); // set active of first li
nextSlide = function(){
go2slide(currentSlide+1);
}
prvSlide = function(){
go2slide(currentSlide-1);
}
var autoPlayIv = false;
(autoPlayStart = slideshow.onmouseout = function(){
if(autoPlayIv) return;
autoPlayIv = setInterval(nextSlide, 2000);
})(); // run auto play
autoPlayStop = slideshow.onmouseover = function(){
clearInterval(autoPlayIv);
autoPlayIv = false;
}
slideshow.getElementsByClassName('next').item(0).onclick=nextSlide;
slideshow.getElementsByClassName('previous').item(0).onclick=prvSlide;
for (var i=0; i<lists.length; i++) {
(function(j){
lists.item(j).onclick=function(){
go2slide(j);
}
})(i);
}
}
i DO have a li tag classes as btn and a btns ul.
its item(0).
and here is the html related to it
<div class="body">
<div class="slide">
<div class="s1">
<div class="slideshow">
<div class="train">
<script type="text/javascript">
var slidesLen = 3;
for(var i=1;i<=slidesLen;i++){
document.write("<div style=\"background-image:url('../images/pic"+i+".jpg');\"></div>");
}
</script>
</div>
<div class="previous"></div>
<div class="next"></div></div>
<ul class="btns">
<i class="btn"></i>
<i class="btn"></i>
<i class="btn"></i>
</ul>
</div>
<div class="s2"></div>
<div class="s3"></div>
<div class="s4"></div>
<div class="s5">
<div class="I"></div>
<div class="II"></div>
<div class="III"></div>
</div>
</div>
<div class="text"></div>
</div>
and of course its only the body.php i am posting here. I don't think header.php which contains the menu and the css and js association tags are needed. tell me if it is

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