Smart Responsive Sticky Navbar In JavaScript

---

Preview:

Description:

A smart responsive sticky navbar that automatically slides down and hides as you scroll down or up the webpage.

It will automatically collapse into a drop-down toggle menu when running on mobile devices.

How to use it:

Load the Font Awesome for the nav icons (OPTIONAL).

<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.10/css/all.css" integrity="sha384-+d0P83n9kaQMCwj8F4RJB66tzIwOKmrdb46+porD/OvrJ+37WqIM7UoBtwHO6Nlg" crossorigin="anonymous">

Create the sticky nav.

<nav id="sticky_nav">
  <div class="container_left">
    <a href="#">
      <i class="fa fa-home"></i>
    </a>
    <button id="btnMenu" onclick="openMenu()">
      <i class="fa fa-bars"></i>
      <i class="fa fa-close"></i>
    </button>
  </div>
  <div class="container_menu" id="thisMenu">
    <div class="container_list">
      <button class="btnList" onclick="openList('1')">
        <span class="drop">Dropdown 1</span>
        <span class="acc">Accordion 1</span>
      </button>
      <div class="content_list left" id="thisList_1">
        <p>1<br>Lorem ipsum<br>Lorem ipsum<br>Lorem ipsum</p>
      </div>
    </div>
    <div class="container_list">
      <button class="btnList" onclick="openList('2')">
        <span class="drop">Dropdown 2</span>
        <span class="acc">Accordion 2</span>
      </button>
      <div class="content_list left" id="thisList_2">
        <p>2<br>Lorem ipsum<br>Lorem ipsum<br>Lorem ipsum</p>
      </div>
    </div>
    <div class="container_list">
      <button class="btnList" onclick="openList('3')">
        <span class="drop">Dropdown 3</span>
        <span class="acc">Accordion 3</span>
      </button>
      <div class="content_list center" id="thisList_3">
        <p>3<br>Lorem ipsum<br>Lorem ipsum<br>Lorem ipsum</p>
      </div>
    </div>
    <div class="container_list">
      <button class="btnList" onclick="openList('4')">
        <span class="drop">Dropdown 4</span>
        <span class="acc">Accordion 4</span>
      </button>
      <div class="content_list right" id="thisList_4">
        <p>4<br>Lorem ipsum<br>Lorem ipsum<br>Lorem ipsum</p>
      </div>
    </div>
    <div class="container_list">
      <button class="btnList" onclick="openList('5')">
        <span class="drop">Dropdown 5</span>
        <span class="acc">Accordion 5</span>
      </button>
      <div class="content_list right" id="thisList_5">
        <p>5<br>Lorem ipsum<br>Lorem ipsum<br>Lorem ipsum</p>
      </div>
    </div>
  </div>
  <div class="container_right">
    <div class="content_search" id="thisSearch">
      <form><input type="text" placeholder="Search..."></form>
    </div>
    <button id="btnSearch" onclick="openSearch()">
      <i class="fa fa-search"></i>
      <i class="fa fa-close"></i>
    </button>
  </div>
</nav>

The necessary styles and media queries for the sticky nav.

#sticky_nav {
  top: -45px;
  position: fixed;
  z-index: 999;
  transition: all .5s ease
}

.btnList { width: 120px }

.content_list {
  background: #fff;
  width: 250px;
  top: 45px
}

.content_list.left, .content_list.left:before { left: 0 }

.content_list.center { left: -65px }

.content_list.center:before {
  left: 50%;
  transform: translate(-50%, 0)
}

.content_list.right, .content_list.right:before { right: 0 }

.content_list:before {
  width: 8px;
  top: -8px;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-bottom: 8px solid #fff
}

.container_right { float: right }

.content_search {
  top: 0;
  right: 40px
}

input[type=text] {
  background: #fff;
  font-size: 22px;
  border-radius: 5px
}

input[type=text]:focus { outline: none }

[class*="show"] {
display:block
}

.show_list {
  padding: 20px 0;
  animation: height 1s ease
}

@keyframes 
height { from {
padding:0;
opacity:0
}

to {
  padding: 20px 0;
  opacity: 1
}
}

.show_search form {
  width: 150px;
  padding: 6px;
  animation: width 1s ease
}

@keyframes 
width { from {
width:0;
opacity:0
}

to {
  width: 150px;
  opacity: 1
}
}

.visible { display: inline-block }

.hidden { display: none }

@media (max-width:683px) {

#btnMenu { display: block }

.container_menu { display: none }

.container_list { width: 100% }

.btnList {
  width: 100%;
  box-shadow: 0 2px 2px -2px #333
}

.drop { display: none }

.acc { display: inline-block }

.content_list {
  width: 100%;
  top: 0;
  position: relative;
  float: left
}

.content_list.left, .content_list.center, .content_list.right {
  left: 0;
  right: 0
}

.content_list.left:before, .content_list.center:before, .content_list.right:before {
  left: 50%;
  transform: translate(-50%, 0)
}

.show_menu {
  background: #1a1a1a;
  width: 100%;
  top: 45px;
  display: block;
  position: absolute
}
}

The JavaScript to activate the sticky nav.

window.onscroll = function(){
   scrollFunction()
}
function scrollFunction(){
   var sn = document.getElementById("sticky_nav");
      if(document.body.scrollTop > 100 || document.documentElement.scrollTop > 100){
         sn.style.top = "0"
      }
      else{
         sn.style.top = "-45px"
      }
}

function openList(x){
   var cL = document.getElementsByClassName("content_list");
   var i;
      for(i = 0; i < cL.length; i++){
         var OcL = cL[i];
            if(cL[i] != document.getElementById("thisList_" + x)){
               OcL.classList.remove("show_list")
            }
      }
   document.getElementById("thisList_" + x).classList.toggle("show_list")
}

function openSearch(){
   if(document.getElementById("btnSearch")){
      document.getElementById("thisSearch").classList.toggle("show_search");
      document.getElementById("btnSearch").getElementsByTagName("i")[0].classList.toggle("hidden");
      document.getElementById("btnSearch").getElementsByTagName("i")[1].classList.toggle("visible")
   }
}

function openMenu(){
   if(document.getElementById("btnMenu")){
      document.getElementById("thisMenu").classList.toggle("show_menu");
      document.getElementById("btnMenu").getElementsByTagName("i")[0].classList.toggle("hidden");
      document.getElementById("btnMenu").getElementsByTagName("i")[1].classList.toggle("visible")
   }
}