How to make a dropdown search in the menu?

Question

css

I have a menu with a search and I need to make a drop-down search for it (when a button is clicked). Here is the code for this menu https://jsfiddle.net/Renzi0n/kwagvz2z/ . Tried different ways, does not help.
And yes, in js and jq is not particularly strong.

Answer 1

$(document).ready(function() {
  $(".button-search").click(function() {
    $(".form-search").toggle();
  });
});