On page navigation with anchor tag on dropdown menu

$(document).ready(function(){
    $('[data-toggle="tooltip"]').tooltip();   
  });
    const $dropdown = $(".dropdown");
    const $dropdownToggle = $(".dropdown-toggle");
    const $dropdownMenu = $(".dropdown-menu");
    const showClass = "show";
    $(window).on("load resize", function() {
      if (this.matchMedia("(min-width: 768px)").matches) {
        $dropdown.hover(
          function() {
            const $this = $(this);
            $this.addClass(showClass);
            $this.find($dropdownToggle).attr("aria-expanded", "true");
            $this.find($dropdownMenu).addClass(showClass);
          },
          function() {
            const $this = $(this);
            $this.removeClass(showClass);
            $this.find($dropdownToggle).attr("aria-expanded", "false");
            $this.find($dropdownMenu).removeClass(showClass);
          }
        );
      } else {
        $dropdown.off("mouseenter mouseleave");
      }
    });

.navbar{
  background-color: black;
  padding-left: 5vw;
  padding-right: 4vw;
}

.navbar .nav-item{
  text-align: center;
  padding-top: 40px;
  padding-bottom: 40px;
}

.navbar .nav-item .nav-link{
  color: white;
  font-size: 18px;
  font-family: 'Roboto';
  font-weight: bold;
}

.navbar .nav-item .nav-link:hover{
  color: red;
  text-decoration: none;
}

.navbar .nav-item a:hover{
  color: #4c4c4c;
}

.navbar .nav-item:not(:last-child) {
  margin-right: 5px;
}

.dropdown-toggle::after {
   transition: transform 0.15s linear; 
   content: none;
}

.show.dropdown .dropdown-toggle::after {
  transform: translateY(3px);
}

.dropdown-menu {
  margin-top: 5px;
  border-top: 5px solid red;
  border-radius: 0;
  padding: 0;
}

.navbar .nav-item a{
  font-size: 18px;
  color: #080808;
  padding-top: 12px;
  padding-bottom: 12px;
  padding-right: 40px;
  font-weight: 400;
  font-family: 'Roboto';
  background-color: none;
  border-bottom: 1px solid rgba(193,193,193,0.59);
}

.navbar .nav-item .nav-link{
  border-bottom: none;
}

<nav class="navbar navbar-expand-lg"><div class="container-fluid"><button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"><span class="navbar-toggler-icon"></span></button><div class="collapse navbar-collapse" id="navbarSupportedContent"><ul class="navbar-nav ml-auto"><li class="nav-item dropdown"><a href="#information" class="nav-link dropdown-toggle" id="navbarDropdown1" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                        About Us</a><div class="dropdown-menu" aria-labelledby="navbarDropdown1"><a class="dropdown-item" href="#">Who we are</a><a class="dropdown-item" href="#">What we do</a></div></li><li class="nav-item"><a class="nav-link" href="#">Events</a></li><li class="nav-item"><a class="nav-link" href="#">Contact Us</a></li></ul></div></div></nav>