Why doesn't .dropdown('toggle') work in Bootstrap 4?

Question

JavaScript

Hello.
Recently moved to a new version: Bootstrap 4 .
In the old version, it worked, but in the new version, hiding the div with the class: dropdown-menu does not work .

$('.dropdown-toggle').click(function() {
$(this).dropdown('toggle');
});

Reveals, but does not hide when clicked again. Do not display errors in console.

Please help me understand the problem.

Answer 1

Found a solution?