code: function compare(pathData,opts={}) {
  	var polys = svgPathToPolygons(pathData,opts);
  	var minX=Infinity, maxX=-Infinity, minY=Infinity, maxY=-Infinity;
  	polys.forEach(poly => {
  		poly.forEach(pt => {
  			if (pt[0]<minX) minX=pt[0];
  			if (pt[1]<minY) minY=pt[1];
  			if (pt[0]>maxX) maxX=pt[0];
  			if (pt[1]>maxY) maxY=pt[1];
  		});
  	});
  	let dx=maxX-minX, dy=maxY-minY;
  	console.log(`
  <svg xmlns="http://www.w3.org/2000/svg" width="${dx}px" height="${dy}px" viewBox="${minX} ${minY} ${dx*2} ${dy}">
  <style>path,polygon,polyline { fill-opacity:0.2; stroke:black }</style>
  <path d="${pathData}"/>
  <g transform="translate(${dx},0)">
  ${polys.map(poly => `  <${poly.closed ? 'polygon' : 'polyline'} points="${poly.join(' ')}"/>`).join("\n")}
  </g>
  </svg>
  	`.trim());
  }
docs: OMG YOU FOUND THE SECRET UNDOCUMENTED FEATURE