code: function drawChart(canvas, data) {
          var ctx = canvas.getContext('2d'),
              color = 'rgba(0, 0, 0, 0.75)',
              height = canvas.height - 2,
              width = canvas.width,
              total = data.length,
              max = Math.max.apply(Math, data),
              xstep = 1,
              ystep = max / height,
              x = 0,
              y = height - data[0] / ystep;
  
          ctx.clearRect(0, 0, width, height);
          ctx.beginPath();
          ctx.strokeStyle = color;
          ctx.moveTo(x, y);
  
          for (var i = 1; i < total; i++) {
              x += xstep;
              y = height - data[i] / ystep + 1;
              ctx.moveTo(x, height);
              ctx.lineTo(x, y);
          }
  
          ctx.stroke();
      }
docs: Just a simple chart drawer, not related to SSE-channel