Graphical primitives for visualization, such as lines and areas.

Compute the quadtree tiles to display in a rectangular viewport.

A calculator for humanity’s peculiar conventions of time.

Parse and format times, inspired by strptime and strftime.

An efficient queue for managing thousands of concurrent animations.

Animated transitions for D3 selections.

Pan and zoom SVG, HTML or Canvas using mouse or touch input.

A guided tour of your first steps using D3.