title: Chart content not getting loaded in popup
body: <p>I'm trying to get a leaflet popup to display a Chart.js doughnut, but cant get it to work. I have the popup firing but the chart content wont load.</p>
  
  <pre><code>onEachFeature: function(feature, layer) {
      var chartData = [{
          value: 200,
          color:"#F7464A",
          highlight: "#FF5A5E",
          label: "Size"
      }, {
          value: 100,
          color: "#46BFBD",
          highlight: "#5AD3D1",
          label: "Value"
      }]
  
      L.DomUtil.create('canvas', 'popupGraph');
      var ctx = document.getElementById("popupChart").getContext("2d");
      var chartOptions = {
          animation: false
      };
  
      new Chart(ctx).Doughnut(chartData, chartOptions);
  
      var content = "&lt;canvas id='popupChart'&gt;&lt;/canvas&gt;;
      layer.bindPopup(content)
  </code></pre>