1 d3_transitionPrototype.style = function(name, value, priority) {

     2   if (arguments.length < 3) priority = "";

     3   return this.styleTween(name, d3_transitionTween(name, value), priority);

     4 };

     5 

     6 d3_transitionPrototype.styleTween = function(name, tween, priority) {

     7   if (arguments.length < 3) priority = "";

     8   return this.tween("style." + name, function(d, i) {

     9     var f = tween.call(this, d, i, window.getComputedStyle(this, null).getPropertyValue(name));

    10     return f === d3_transitionRemove

    11         ? (this.style.removeProperty(name), null)

    12         : f && function(t) { this.style.setProperty(name, f(t), priority); };

    13   });

    14 };