title: Export HTML content with Chart.jscanvases to PDF
body: <p>I have an HTML page with around 10 charts generated by chart.js (so these are canvas elements). I want to be able to export the page content into a PDF file.</p>
  
  <p>I've tried using jsPDF's .fromHTML function, but it doesn't seem to support exporting the canvas contents. (Either that or I'm doing it wrong). I just did something like:</p>
  
  <pre><code>    $(".test").click(function() {
    var doc = new jsPDF()
  
    doc.fromHTML(document.getElementById("testExport"));
    doc.save('a4.pdf')
  });
  </code></pre>
  
  <p>Any alternative approaches would be appreciated.</p>