.empty() in jquery

$("div").empty();// Remove all child nodes of the set of matched elements from the DOM
// This method does not accept any arguments.
$("div.parent").empty();// Remove all child nodes of the set of matched elements from the DOM
// This method does not accept any arguments.
$("div.parent").empty();

$("button").click(function(){
   $("div").empty();
});//if empty remove parent
$('#id:empty').parent().remove();