@macangelo You can do it with an external library called vivus.js - svg animation
VIVUS limitation: animations over one second lost sync , only few lines at a time,
Complex animation: disappointing performance on mobile devices and loss of synchronization when using Hype for the cast.
discussion and one of my examples
in any case you can’t use dashed line in this kind of animation.
For the dash line you can use a static line with animation in the internal offset. (no external library)
hope this helps