JavaScript Library for HTML5 canvas based heatmaps

[kevinwdavid]

http://www.patrick-wied.at/static/heatmapjs/

[johneth]

I've been using this for an upcoming project of mine, for static heatmaps, really simple to use.

I do wish you could alter the shape of what's plotted - at the moment it's just circles of different intensity layered on top of one another - it would be really useful to be able to draw a shape of something else (like a line or area).

[thrusong]

I'm just downloading it now. Looks great! Can this be used to track usage and send it data back to the server without drawing any visuals?

[lemieux]

How do you get the right x-y coordinate on a page when its height or width can change (i.e. responsive)?