jacomyal/sigma.js — pull request #458 by qinfchen (2014-12-05 20:00:59+00:00)
Title: SVG: diable all mouse interactions with all label and hover elements

When dragging the graph or a node, any mouse movement that interacts
with label and hover elements can cause some really weird behaviors to
the graph.

pointer-events are not supported for IE 9 and IE 10, so a polyfill
library is added.