line chart with ChartJS

by Christian Bonato

HTML

<script src="https://rawgit.com/nnnick/Chart.js/v1.0.2/Chart.min.js"></script>
<canvas id="myChart" height="300" width="800"></canvas>

JavaScript

Chart.types.Bar.extend({
    name: "BarAlt",
    initialize: function(data){
        Chart.types.Bar.prototype.initialize.apply(this, arguments);
        
        var originalScaleDraw = this.scale.draw;
        this.scale.draw = function() {
        	 originalScaleDraw.apply(this, arguments);
           this.ctx.save();
           this.ctx.beginPath();
           this.ctx.lineWidth = this.gridLineWidth * 5;
           this.ctx.strokeStyle = "rgba(120,120,220,1)";
					 this.ctx.moveTo(Math.round(this.xScalePaddingLeft), this.calculateY(60));
					 this.ctx.lineTo(this.width, this.calculateY(60));
					 this.ctx.stroke();
					 this.ctx.closePath();
           this.ctx.restore();
        }
    }
});

var data = {
  labels: ["Eating", "Drinking", "Sleeping", "Designing", "Coding", "Cycling", "Running"],
  datasets: [
    {
      label: "My First dataset",
      fillColor: "rgba(220,120,120,1)",
      strokeColor: "rgba(220,120,120,1)",
      pointColor: "rgba(220,120,120,1)",
      pointStrokeColor: "#fff",
      pointHighlightFill: "#fff",
      pointHighlightStroke: "rgba(220,120,120,1)",
      data: [5, 5, 9, 81, 56, 55, 40]
    }
  ]
};

var ctx = document.getElementById("myChart").getContext("2d");
new Chart(ctx).BarAlt(data);