recharts/es6/util/cursor/getCursorRectangle.js

React charts

export function getCursorRectangle(layout, activeCoordinate, offset, tooltipAxisBandSize) {
  var halfSize = tooltipAxisBandSize / 2;
  return {
    stroke: 'none',
    fill: '#ccc',
    x: layout === 'horizontal' ? activeCoordinate.x - halfSize : offset.left + 0.5,
    y: layout === 'horizontal' ? offset.top + 0.5 : activeCoordinate.y - halfSize,
    width: layout === 'horizontal' ? tooltipAxisBandSize : offset.width - 1,
    height: layout === 'horizontal' ? offset.height - 1 : tooltipAxisBandSize
  };
}