Why doesn't the click function add the required classes?

Question

Drupal

The site has a similar menu .

It was assumed that when you click on Info, the submenu appears and disappears when you click again.

On some pages (currently on the main one), when clicking on INFO, the code does not work, when viewing the DOM tree, when clicking, a pink highlight occurs and
the consol.log disappears on each click, adds 34 errors \ points, and so on every time.

Changing toggle to addClass does nothing.

The error is floating, sometimes pops up on different pages, today it does not leave the main one. I deleted all scripts / plugins, cleared the cache, it's still the same, while on other pages the script works as it should.

PS: Problem site .

Answer 1

If you use Behaviors in Drupal, then you must use context and once() inside:

$("a.nolink", context).once().click(function () {
  $(this).siblings(".menu").slideToggle();
});

RTFM

Answer 2

Excuse my poopy jQuery, but isn't that easier?

$('.menu__link').click(function(){
  $(".menu__item").removeClass('active');
  $(this).parent().addClass('active');
});