Why doesn't expires work in cookies?

Question

1C-Bitrix

The site has favorites, it has a counter and a link.
The link is stored in $.cookieStorage.
At

var storageCookie = $.cookieStorage;
function wishlistCookie(item) {
  if(storageCookie.isSet('wishlist_items.' + item)) {
    storageCookie.setPath('/').remove('wishlist_items.' + item);
  } else {
    storageCookie.setPath('/').set('wishlist_items.' + item, {expires= 7});

It is not possible to set the storage time, set by default as in the session.
How to fix, how to treat?
Google cookies say
Expiration date
When the browser session ends

Answer 1

Written in a separate line

storageCookie.setPath('/').set('wishlist_items.' + item,"");
    storageCookie.setExpires(7)