code: function renderComponent() {
      var svg = d3.select('svg');
      svg.select('.horizontal')
        .datum([0.15, 0.85])
        .call(horizontalSvgLine);
      svg.select('.vertical')
        .datum([0.2, 0.4, 0.6, 0.8])
        .call(verticalSvgLine);
  
      var canvas = d3.select('canvas').node();
      var ctx = canvas.getContext('2d');
      horizontalCanvasLine.context(ctx)([0.15, 0.85]);
      verticalCanvasLine.context(ctx)([0.2, 0.4, 0.6, 0.8]);
  }
docs: eslint-disable-next-line no-unused-vars