Question

Jquery did not carry out!!!I don’t know why

 $(".other-edithion").click(function(){ 
var city = $(this).closest('#city');
    if (city.is(":hidden"))city.fadeIn("slow");
    else {city.fadeOut("slow");}
 });
 $("#city").mouseleave(function(){
     $("#city").fadeOut("slow");
 });

Answer 1

You do not need .closest() if you have id of an element

var city = $('#city');

As jQuery.closest()

Gets the first element that matches the selector, beginning at the
current element and progressing up through the DOM tree.

If #city is not up through dom tree, selector will fail to match elements.

And for mouse leave,

$('#city, .other-edithion #city').mouseleave(function(){
    $(this).fadeOut('slow');
});