Chart.js/test/fixtures/controller.radar/borderJoinStyle/scriptable.js

module.exports = {
  config: {
    type: 'radar',
    data: {
      labels: [0, 1, 2, 3],
      datasets: [
        {
          // option in dataset
          data: [3, 3, null, 3],
          borderColor: '#ff0000',
          borderJoinStyle: function(ctx) {
            var index = ctx.datasetIndex % 3;
            return index === 0 ? 'round'
              : index === 1 ? 'miter'
              : 'bevel';
          }
        },
        {
          // option in element (fallback)
          data: [2, 2, null, 2],
          borderColor: '#0000ff'
        },
        {
          // option in element (fallback)
          data: [1, 1, null, 1]
        }
      ]
    },
    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: {
        r: {
          display: false,
          beginAtZero: true
        }
      }
    }
  },
  options: {
    canvas: {
      height: 512,
      width: 512
    }
  }
};