1 try {

     2   document.createElement("div").style.setProperty("opacity", 0, "");

     3 } catch (error) {

     4   var d3_style_prototype = CSSStyleDeclaration.prototype,

     5       d3_style_setProperty = d3_style_prototype.setProperty;

     6   d3_style_prototype.setProperty = function(name, value, priority) {

     7     d3_style_setProperty.call(this, name, value + "", priority);

     8   };

     9 }