It's done by updating stroke-dasharray, stroke-dashoffset. http://bl.ocks.org/mbostock/5649592 http://bl.ocks.org/mbostock/5649592 http://jakearchibald.com/20

It's done by updating stroke-dasharray, stroke-dashoffset. http://bl.ocks.org/mbostock/5649592 http://bl.ocks.org/mbostock/5649592 http://jakearchibald.com/2013/animated-line-drawing-svg/ http://jakearchibald.com/2013/animated-line-drawing-svg/ But it's not that new as one would think. http://www.carto.net/svg/samples/animated_bustrack.shtml http://www.carto.net/svg/samples/animated_bustrack.shtml (2008)