We can add new function after an option is selected in the option selection trigger for PDP page
_.each(self.pdp.getItemInfo().options, function (data) {
// function
});
This event triggered after an option is set. The event data is an object.
{
cartOptionId: "custcol_gen_color",
itemOptionId: "custitem_gen_color",
label: "Color",
type: "select",
value: {
internalid: "5",
label: "Blue"
}
}