chartjs content dissapear

HTML

<script src="https://cdn.rawgit.com/nnnick/Chart.js/master/Chart.js"></script>
<script src="https://cdn.rawgit.com/Regaddi/Chart.StackedBar.js/master/src/Chart.StackedBar.js"></script>
<script src="https://code.jquery.com/jquery-1.12.0.min.js"></script>
<canvas id="myChart" height="250" width="500"></canvas>

JavaScript

var data = {
	    labels: ["JAN", "FEB",],
	    datasets: [{
	        label: "Label 1",
	        fillColor: "#000",
	        strokeColor: "#000",
	        pointColor: "#000",
	        pointStrokeColor: "#fff",
	        pointHighlightFill: "#fff",
	        pointHighlightStroke: "#000",
	        data: [2, 3]
	    },
	    {
	        label: "Label 2",
	        fillColor: "#CCC",
	        strokeColor: "#CCC",
	        pointColor: "#CCC",
	        pointStrokeColor: "#000",
	        pointHighlightFill: "#000",
	        pointHighlightStroke: "#CCC",
	        data: [1, 2]
	    }]
	};
  
  var ctx = $("#myChart").get(0).getContext("2d");

	var myBarChart = new Chart(ctx).StackedBar(data, {
		onAnimationComplete: function() {
            var ctx = this.chart.ctx;
            ctx.font = this.scale.font;
            ctx.fillStyle = '#FFF';
            ctx.fontSize = '14px';
            ctx.textAlign = "center";
            ctx.textBaseline = "middle";
            this.datasets.forEach(function(dataset) {
                dataset.bars.forEach(function(bar) {
                    ctx.fillText(bar.value, bar.x, bar.y + 15);
                });
            });
        }
	});