I can second this. Did a mind map + force directed graph where the lines connected at the edges of each node and each node had to be markup/css (so canvas was

I can second this. Did a mind map + force directed graph where the lines connected at the edges of each node and each node had to be markup/css (so canvas was out). Making the dots slide around the node perimeter smoothly ended up working best by doing some trig and placing them absolutely within the node div. Super hacky but it was what worked.