<header>
<nav>
  <div class="menu-container">
    <!-- Menu -->
    <ul class="menu">
      <li class="menu-apple">
        <a href="#">
          <i class="fa fa-apple apple-icon" aria-hidden="true"></i>
        </a>
      </li>
      <li class="menu-mac">
        <a href="#">
          <span>Mac</span>
        </a>
      </li>
      <li class="menu-iPad">
        <a href="#">
          <span>iPad</span>
        </a>
      </li>
      <li class="menu-iPhone">
        <a href="#">
          <span>iPhone</span>
        </a>
      </li>
      <li class="menu-watch">
        <a href="#">
          <span>Watch</span>
        </a>
      </li>
      <li class="menu-tv">
        <a href="#">
          <span>TV</span>
        </a>
      </li>
      <li class="menu-support">
        <a href="#">
          <span>Support</span>
        </a>
      </li>
      <li class="menu-search">
        <a href="#">
          <i class="fa fa-search" aria-hidden="true"></i>
        </a>
      </li>
      <li class="menu-store">
        <a href="#">
          <i class="fa fa-shopping-bag" aria-hidden="true"></i>
        </a>
      </li>
    </ul>
    
    <!-- Search -->
    <div class="menu-search-container">
      <div class="menu-search-input">
      <form action="">
        <a href="#">
          <i class="fa fa-search" aria-hidden="true"></i>
        </a>
        <input class="menu-search-input" type="text" aria-label="Search apple.com" placeholder="Search apple.com" autocorrect="off" autocapitalize="off" autocomplete="off" spellcheck="false">
      </form>
      </div>
      <a class="menu-search-close" href="#">
        <i class="fa fa-close" aria-hidden="true"></i>
      </a> 
      <div class="search-sub-menu">
      <h3>Quick Links</h3>
      <ul>
        <li><a href="#">Find a store</a></li>
        <li><a href="#">Accessories</a></li>
        <li><a href="#">iPod</a></li>
        <li><a href="#">iOS</a></li>
        <li><a href="#">Gift Cards</a></li>
      </ul>
    </div>
    </div>
   
  </div>
</nav>
</header>
<div class="fade-screen"></div>
// ----------------------------
// BASE STYLES
// ----------------------------

.vh {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

.fade-screen {
  background: rgba(0,0,0,0.2);
  visibility: hidden;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

// ----------------------------
// ANIMATIONS
// ----------------------------

@keyframes specialFadeIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
  }
}

.specialFadeIn {
  animation-name: specialFadeIn;
}

@keyframes specialFadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
    transform: scale(0.8);
  }
}

.specialFadeOut {
  animation-name: specialFadeOut;
}

@keyframes specialSlideInRight {
  from {
    transform: translate3d(10%, 0, 0);
    visibility: visible;
  }

  to {
    transform: translate3d(0, 0, 0);
  }
}

.specialSlideInRight {
  animation-name: specialSlideInRight;
}

@keyframes specialFadeInRight {
  from {
    opacity: 0;
    transform: translate3d(10%, 0, 0);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

.spceialFadeInRight {
  animation-name: specialFadeInRight;
}

.menu-search-container.active {
  display: block;
  animation-name: specialFadeOut;  
  transition: opacity 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
}

.visible {
  visibility: visible;
}

.hidden {
  display: none;
  transition: opacity 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
}

.menu {
  ul li {
    transition: opacity 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
  }
}

.menu-mac {
  &.is-closed {
    animation-name: specialFadeIn;
    animation-delay: 30ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
 
  &.hidden {
    animation-name: specialFadeOut;
    animation-delay: 245ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
}

.menu-iPad {
  &.is-closed {
    animation-name: specialFadeIn;
    animation-delay: 70ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
  
  &.hidden {
    animation-name: specialFadeOut;
    animation-delay: 210ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
}
  
.menu-iPhone {
  &.is-closed {
    animation-name: specialFadeIn;
    animation-delay: 100ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
    
  &.hidden {
    animation-name: specialFadeOut;
    animation-delay: 170ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
}

.menu-watch {
  &.is-closed {
    animation-name: specialFadeIn;
    animation-delay: 130ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
  
  &.hidden {
    animation-name: specialFadeOut;
    animation-delay: 130ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
}
  
.menu-tv {
  &.is-closed {
    animation-name: specialFadeIn;
    animation-delay: 170ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
    
  &.hidden {
    animation-name: specialFadeOut;
    animation-delay: 100ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
}

.menu-support {
  &.is-closed {
    animation-name: specialFadeIn;
    animation-delay: 210ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
    
  &.hidden {
    animation-name: specialFadeOut;
    animation-delay: 70ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
}


.menu-search {
  &.is-closed {
    animation-name: specialFadeIn;
    animation-delay: 245ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
    
  &.hidden {
    animation-name: specialFadeOut;
    animation-delay: 30ms;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
}


.menu-store {
  &.is-closed {
    animation-name: specialFadeIn;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
    
  &.hidden {
    animation-name: specialFadeOut;
    animation-duration: 400ms;
    animation-fill-mode: both;
  }
}

.menu-search-input  {
  animation-name: specialFadeInRight;
  animation-duration: 400ms;
  animation-fill-mode: both;
  animation-delay: 350ms;
}

.search-sub-menu h3 {
  animation-name: specialFadeInRight;
  animation-duration: 700ms;
  animation-fill-mode: both;
}

.search-sub-menu ul li {
  animation-name: specialFadeInRight;
  animation-duration: 500ms;
  animation-fill-mode: both;

  &:nth-child(1) {  
    animation-delay: 0ms;
  }
  &:nth-child(2) {
    animation-delay: 30ms;
  }
  &:nth-child(3) {  
    animation-delay: 50ms;
  }
  &:nth-child(4) {
    animation-delay: 70ms;
  }
  &:nth-child(5) {
    animation-delay: 90ms;
  }
  
}

// ----------------------------
// NAV
// ----------------------------

nav {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 48px;
  min-width: 1024px;
  background: rgba(0,0,0,0.8);
  font-size: 18px;
  z-index: 2;
}

.menu-container {
  position: relative;
  margin: 0 auto;
  margin-top: -5px;
  max-width: 980px;
  padding: 0 22px;
  
  ul {
    list-style: none;
  }
  
  ul li {
    display: inline-block;
    text-align: center;
    width: auto;
    margin-right: 76px;
    
    &:last-child {
      margin-right: 0;
    }
  }
  
  ul li a {
    display: inline-block;
    font-family: -apple-system, BlinkMacSystemFont, 
      "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", 
      "Fira Sans", "Droid Sans", "Helvetica Neue", 
      sans-serif;
    text-decoration: none;
    color: #fff;
    font-weight: 100;
    font-size: 16px;
    float: left;
    
    &:hover {
      color: #969696;
    }
  }
  
  &.menu-apple {
    background-repeat: no-repeat;
    width: 20px;
  }
}

.apple-icon {
  font-size: 20px;
}

// ----------------------------
// NAV Search Form
// ----------------------------

.menu-search-container {
  display: none;
  position: absolute;
  top: 0;
  left: 20.6667%;
  width: 56.66667%;
  z-index: 2;
  
  input {
    background-color: transparent;
    border: none;
    width: 80%;
    font-size: 16px;
    outline: none;
    color: #fff;
  }
  
  a {
    color: #fff;
    
    &:first-child {
      display: block;
      float: left;
      padding-right: 10px;
    }
  }
  
  &.active {
    display: block;
  }
}

.menu-search-close {
  position: absolute;
  right: -183px;
  top: 0;
}

// Sub Menu
.search-sub-menu {
  background: #fff;
  width: 100%;
  margin-top: 14px;
  color: #999;
  font-weight: 100;
  padding: 24px 0 15px;
  z-index: 1;
  
  h3 {
    font-size: 12px;
    font-weight: 100;
    margin-top: 0;
    padding-left: 28px;
  }
  
  ul {
    margin: 0;
    padding: 0;
    width: 100%;
    
    li {
      display: block;
      text-align: left;
      padding-bottom: 10px;
      margin: 0;
      text-indent: 50px;
      
      a {
        font-size: 14px;
        color: #999;
        width: 100%;
        padding-top: 5px;
        padding-bottom: 5px;
        
        &:hover {
          background-color: #f2f2f2;
          color: #3392de;
        }
        
        &:first-child {
          float: none;
          padding-right: 0;  
        }
      }
    }
    
  }
  
}
View Compiled
(function() {

  'use strict';
  
  var $searchView = $('.menu-search-container');
  var $menu = $('.menu-mac, .menu-iPad, .menu-iPhone, .menu-watch, .menu-tv, .menu-support, .menu-search, .menu-store');
  var $fadeScreen = $('.fade-screen');
  
  $('li.menu-search a, .fade-screen, .menu-search-close').on('click', function(e) {
    
    $searchView.toggleClass('active');
    
    setTimeout(function(){
      $searchView.children().find('input').focus();
    }, 1100);
    
    $fadeScreen.toggleClass('visible');
    $menu.removeClass('is-closed');
    $menu.toggleClass('hidden');
    
    e.preventDefault();
  });
  
  $('.fade-screen,.menu-search-close').on('click', function(e) {
    $menu.toggleClass('is-closed');
    e.preventDefault();
  });
    
}())

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.5.2/animate.min.css
  2. https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js