ElementById("chart-bars").getContext("2d");

    new Chart(ctx, {
      type: "bar",
      data: {
        labels: ["Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
        datasets: [{
          label: "Sales",
          tension: 0.4,
          borderWidth: 0,
          borderRadius: 4,
          borderSkipped: false,
          backgroundColor: "#fff",
          data: [450, 200, 100, 220, 500, 100, 400, 230, 500],
          maxBarThickness: 6
        }, ],
      },
      options: {
        r