Trying to use Chart.js sever-side

chartjs-node.js

var Canvas = require('canvas')
  , Image = Canvas.Image;
var fs = require('fs');
var jsdom = require("jsdom");
jsdom.defaultDocumentFeatures = {
    FetchExternalResources: ["script"],
    ProcessExternalResources: true
};
global.Canvas = Canvas;
global.Image = Canvas.Image;
jsdom.env('<div id="chart-div" style="font-size:12; width:800px; height:800px;"><canvas id="myChart" width="400" height="400"></canvas>></div>',
  ['https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.2.2/Chart.js'],
  function (err, window) {
    global.window = window;
    global.document = window.document;
    var canvas = document.getElementById('myChart');
    var ctx = canvas.getContext('2d');
    var myChart = new window.Chart(ctx, {
        type: 'bar',
        data: {
            labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
            datasets: [{
                label: '# of Votes',
                data: [12, 19, 3, 5, 2, 3],
                backgroundColor: [
                    'rgba(255, 99, 132, 0.2)',
                    'rgba(54, 162, 235, 0.2)',
                    'rgba(255, 206, 86, 0.2)',
                    'rgba(75, 192, 192, 0.2)',
                    'rgba(153, 102, 255, 0.2)',
                    'rgba(255, 159, 64, 0.2)'
                ],
                borderColor: [
                    'rgba(255,99,132,1)',
                    'rgba(54, 162, 235, 1)',
                    'rgba(255, 206, 86, 1)',
                    'rgba(75, 192, 192, 1)',
                    'rgba(153, 102, 255, 1)',
                    'rgba(255, 159, 64, 1)'
                ],
                borderWidth: 1
            }]
        },
        options: {
            width: 400,
            height: 400,
            animation: false,
            scales: {
                yAxes: [{
                    ticks: {
                        beginAtZero:true
                    }
                }]
            }
        }
    });
  }
);