1 d3_selectionPrototype.style = function(name, value, priority) {

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

     3 

     4   // If no value is specified, return the first value.

     5   if (arguments.length < 2) return window

     6       .getComputedStyle(this.node(), null)

     7       .getPropertyValue(name);

     8 

     9   function styleNull() {

    10     this.style.removeProperty(name);

    11   }

    12 

    13   function styleConstant() {

    14     this.style.setProperty(name, value, priority);

    15   }

    16 

    17   function styleFunction() {

    18     var x = value.apply(this, arguments);

    19     if (x == null) this.style.removeProperty(name);

    20     else this.style.setProperty(name, x, priority);

    21   }

    22 

    23   return this.each(value == null

    24       ? styleNull : (typeof value === "function"

    25       ? styleFunction : styleConstant));

    26 };