test pdf image

HTML

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.4.1/jspdf.min.js"></script>
 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<div class="col-md-12">
<div class="pull-left" id = "logo"><img src="#" title="logo"></div>
<div class="pull-right" id = "date"></div>
</div>
<div id="content">
      <p>This is the element you only want to capture</p>   
       <p>This is the element you only want to capture</p>  
        <p>This is the element you only want to capture</p> 
         <p>This is the element you only want to capture</p>    
          <p>This is the element you only want to capture</p>   
          <p>This is the element you only want to capture</p>   
       <p>This is the element you only want to capture</p>  
        <p>This is the element you only want to capture</p> 
         <p>This is the element you only want to capture</p>    
          <p>This is the element you only want to capture</p>   
    </div>

    <button id="print">Download Pdf</button>
    <footer>This is the footer</footer>
</body>
</html>

JavaScript

$(document).ready(function() {
var today = new Date();
var dd = today.getDate();
var mm = today.getMonth()+1; //January is 0!
var yyyy = today.getFullYear();

if(dd<10) {
    dd = '0'+dd
} 

if(mm<10) {
    mm = '0'+mm
} 

today = mm + '/' + dd + '/' + yyyy;
$('#date').append(today);
      $('#print').click(function() {
     var currentPosition = document.getElementById("content").scrollTop;
      var w = document.getElementById("content").offsetWidth;
      var h = document.getElementById("content").offsetHeight;
     document.getElementById("content").style.height="auto";
 
      html2canvas(document.getElementById("content"), {

        dpi: 300, // Set to 300 DPI
        scale: 3, // Adjusts your resolution
        
     
        
        
        
        onrendered: function(canvas) {
          var img = canvas.toDataURL("image/jpeg", 1);
          var doc = new jsPDF('L', 'px', [w, h]);
          doc.addImage(img, 'JPEG', 0, 0, w, h);
           var base64String =...