Improvement

[PascalHessler]

Hey first i want to thank you for u'r cool explanations. I found a small improvement at this side.

You’re describing 3 ways how to get the mouse position. The first way is not a good solution because it does not work in every browser. Instead of event.pageX() you should use d3.event.pageX. It works really good for me. Especially when u zoom in and out it’s the only solution that really works.