title: jsPDF is not defined error in html project?
body: <p>I am implementing jsPdf example and have sample html project in which i included jquery and jspdf cdn link to generate pdf. Here is my code</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  
  &lt;head&gt;
      &lt;meta charset="utf-8" /&gt;
      &lt;meta http-equiv="X-UA-Compatible" content="IE=edge"&gt;
      &lt;title&gt;Page Title&lt;/title&gt;
      &lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
      &lt;script&gt; src = "https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.3.4/jspdf.min.js"&lt;/script&gt;
      &lt;script src="https://code.jquery.com/jquery-2.2.4.min.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
      &lt;div id="content"&gt;
          &lt;p&gt;Testing testing testing&lt;/p&gt;
      &lt;/div&gt;
      &lt;button type="button" id="export"&gt;Export To Pdf&lt;/button&gt;
      &lt;script&gt;
          var doc = new jsPDF();
          $('#export').click(function () {
              doc.fromHTML($('#content').html(), 15, 15, {
                  'width': 170
              });
              doc.save('sample-file.pdf');
          });
      &lt;/script&gt;
  &lt;/body&gt;
  
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>But it is giving this error </p>
  
  <pre><code>Uncaught ReferenceError: jsPDF is not defined
  at index.html:19
  </code></pre>
  
  <p>What's wrong in my code?</p>