d3.curveStepBefore(context)

arc.cornerRadius([radius]) If radius is specified, sets the corner radius to the specified function or number

radialArea(data) Equivalent to area.

radialArea.outerRadius([radius]) Equivalent to

stack.order([order]) If order is specified, sets the order accessor to the specified function or array and

d3.stackOrderNone(series) Returns the given series order [0, 1, … n - 1] where n is the number of elements

line.y([y]) If y is specified, sets the y accessor to the specified function or number and returns this line

pie.padAngle([angle]) If angle is specified, sets the pad angle to the specified function or number and returns

symbol.size([size]) If size is specified, sets the size to the specified function or number and returns this

area.x0([x]) If x is specified, sets the x0 accessor to the specified function or number and returns this area