import “../core/document”; import “selection”;
d3_selectionPrototype.style = function(name, value, priority) {
var n = arguments.length; if (n < 3) { // For style(object) or style(object, string), the object specifies the // names and values of the attributes to set or remove. The values may be // functions that are evaluated for each element. The optional string // specifies the priority. if (typeof name !== "string") { if (n < 2) value = ""; for (priority in name) this.each(d3_selection_style(priority, name[priority], value)); return this; } // For style(string), return the computed style value for the first node. if (n < 2) return d3_window.getComputedStyle(this.node(), null).getPropertyValue(name); // For style(string, string) or style(string, function), use the default // priority. The priority is ignored for style(string, null). priority = ""; } // Otherwise, a name, value and priority are specified, and handled as below. return this.each(d3_selection_style(name, value, priority));
};
function d3_selection_style(name, value, priority) {
// For style(name, null) or style(name, null, priority), remove the style // property with the specified name. The priority is ignored. function styleNull() { this.style.removeProperty(name); } // For style(name, string) or style(name, string, priority), set the style // property with the specified name, using the specified priority. function styleConstant() { this.style.setProperty(name, value, priority); } // For style(name, function) or style(name, function, priority), evaluate the // function for each element, and set or remove the style property as // appropriate. When setting, use the specified priority. function styleFunction() { var x = value.apply(this, arguments); if (x == null) this.style.removeProperty(name); else this.style.setProperty(name, x, priority); } return value == null ? styleNull : (typeof value === "function" ? styleFunction : styleConstant);
}