transition.each(function) Invokes the specified function for each selected element, passing in the current

transition.attrTween(name[, factory]) If factory is specified and not null, assigns the attribute

selection.transition([name]) Returns a new transition on the given selection with the specified name

transition.select(selector) For each selected element, selects the first descendant element that matches the specified

transition.tween(name[, value]) For each selected element, assigns the tween with the specified name

transition.attr(name, value) For each selected element, assigns the

transition.call(function[, arguments…]) Invokes the specified function exactly once, passing in this

d3.active(node[, name]) Returns the active transition on the specified node with the specified name