module.exports = {
  config: {
    type: 'line',
    data: {
      labels: [0, 1, 2],
      datasets: [
        {
          // option in dataset
          data: [6, 18, 6],
          borderColor: '#ff0000',
          borderJoinStyle: function(ctx) {
            var index = ctx.datasetIndex % 3;
            return index === 0 ? 'round'
              : index === 1 ? 'miter'
              : 'bevel';
          }
        },
        {
          // option in element (fallback)
          data: [2, 14, 2],
          borderColor: '#0000ff',
        },
        {
          // option in element (fallback)
          data: [-2, 10, -2]
        }
      ]
    },
    options: {
      elements: {
        line: {
          borderColor: '#00ff00',
          borderJoinStyle: function(ctx) {
            var index = (ctx.datasetIndex % 3);
            return index === 0 ? 'round'
              : index === 1 ? 'miter'
              : 'bevel';
          },
          borderWidth: 25,
          fill: false,
          tension: 0
        }
      },
      layout: {
        padding: 32
      },
      scales: {
        x: {display: false},
        y: {display: false}
      }
    }
  },
  options: {
    canvas: {
      height: 256,
      width: 512
    }
  }
};
