where the search box post event is fired in admin panel of nopcommerce 3.90

I am working in nopcommerce 3.90, in that at admin panel when I am seaching data in search box at that time I am confuse that where(from which page) the search post event[http post method] is fired. I just know that the search box design is coming from _adminlayout.cshtml view page i.e.

<div class="sidebar-form">
    <div id="search-box">
        <input type="text" class="form-control admin-search-box typeahead" placeholder="@T("Admin.Menu.Search")">
    </div>
</div>

but where the search box regarding event is fired that still searching.

Please help me to solve this confusion.

Thank You.

It's typeahead js

You can find implementation at : Nop.Web > Administration > Scripts > admin.search.js
To see that file, you'll get more confused 😖.
You need to understand how typeahead js works