Passive Event Listener for Performance

[thepian]

Events such as touchstart and scroll must be registered in modern browsers with passive event listeners.

#595

[davidjbradshaw]

Thanks for this, I just came across this same issue in a project at work last week. I guess Chrome just started warning about it.

Before I merge it I just have one question, I see you check for support? Is this needed? Shouldn't old browsers just ignore this option if they don't support it?

[emilv]

@davidjbradshaw You would think that, but the Chrome team decided to break backwards compatibility when they introduced this feature. The third parameter is a bool with a different meaning in previous browsers.

[davidjbradshaw]

Thank you, released v.3.6.2