Velocity.js fullscreen flexbox overlay navigation

index.html

<div class="overlay-navigation">
  <nav role="navigation">
    <ul>
      <li><a href="#" data-content="The beginning">Home</a></li>
      <li><a href="#" data-content="Curious?">About</a></li>
      <li><a href="#" data-content="I got game">Skills</a></li>
      <li><a href="#" data-content="Only the finest">Works</a></li>
      <li><a href="#" data-content="Don't hesitate">Contact</a></li>
    </ul>
  </nav>
</div>

<section class="home">
    <a href="https://codepen.io/fluxus/pen/gPWxXJ" target="_blank">Click for CSS version</a>
  <div class="open-overlay">
    <span class="bar-top"></span>
    <span class="bar-middle"></span>
    <span class="bar-bottom"></span>
  </div>
</section>

script.js

     $('.open-overlay').click(function() {
       $('.open-overlay').css('pointer-events', 'none');
       var overlay_navigation = $('.overlay-navigation'),
         top_bar = $('.bar-top'),
         middle_bar = $('.bar-middle'),
         bottom_bar = $('.bar-bottom');

       overlay_navigation.toggleClass('overlay-active');
       if (overlay_navigation.hasClass('overlay-active')) {

         top_bar.removeClass('animate-out-top-bar').addClass('animate-top-bar');
         middle_bar.removeClass('animate-out-middle-bar').addClass('animate-middle-bar');
         bottom_bar.removeClass('animate-out-bottom-bar').addClass('animate-bottom-bar');
         overlay_navigation.removeClass('overlay-slide-up').addClass('overlay-slide-down')
         overlay_navigation.velocity('transition.slideLeftIn', {
           duration: 300,
           delay: 0,
           begin: function() {
             $('nav ul li').velocity('transition.perspectiveLeftIn', {
               stagger: 150,
               delay: 0,
               complete: function() {
                 $('nav ul li a').velocity({
                   opacity: [1, 0],
                 }, {
                   delay: 10,
                   duration: 140
                 });
                 $('.open-overlay').css('pointer-events', 'auto');
               }
             })
           }
         })

       } else {
         $('.open-overlay').css('pointer-events', 'none');
         top_bar.removeClass('animate-top-bar').addClass('animate-out-top-bar');
         middle_bar.removeClass('animate-middle-bar').addClass('animate-out-middle-bar');
         bottom_bar.removeClass('animate-bottom-bar').addClass('animate-out-bottom-bar');
         overlay_navigation.removeClass('overlay-slide-down').addClass('overlay-slide-up')
         $('nav ul li').velocity('transition.perspectiveRightOut', {
           stagger: 150,
           delay: 0,
           complete: function() {
             overlay_navigation.velocity('transition.fadeOut', {
               delay: 0,
               duration: 300,
               complete: function() {
                 $('nav ul li a').velocity({
                   opacity: [0, 1],
                 }, {
                   delay: 0,
                   duration: 50
                 });
                 $('.open-overlay').css('pointer-events', 'auto');
               }
             });
           }
         })
       }
     })

scripts

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/velocity/1.2.3/velocity.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/velocity/1.2.3/velocity.ui.min.js"></script>

style.css

@import url(https://fonts.googleapis.com/css?family=Work+Sans:400,300,700|Open+Sans:400italic,300italic);
body {
  background-color: #fff
}

.home {
  width: 100%;
  height: 100vh;
  position: relative;
  background-image: url(https://images.unsplash.com/photo-1444927714506-8492d94b4e3d?ixlib=rb-0.3.5&q=80&fm=jpg&crop=entropy&s=067f0b097deff88a789e125210406ffe);
  background-size: cover;
  background-position: center center;
}


/* ====================================
Navigation 
==================================== */

.overlay-navigation {
  position: fixed;
  z-index: 99;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: hsla(0, 0%, 100%, 0.2);
  display: none;
  opacity: 0;
}

nav,
nav ul {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

nav ul {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  list-style: none;
}

nav ul li {
  -webkit-flex-basis: 20%;
  -ms-flex-preferred-size: 20%;
  flex-basis: 20%;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  height: 100%;
  overflow: hidden;
  opacity: 0;
  display: none;
}

nav li a {
  position: relative;
  top: 46%;
  color: #fff;
  text-transform: uppercase;
  font-family: 'Work sans', sans-serif;
  font-weight: 300;
  letter-spacing: 4px;
  text-decoration: none;
  display: block;
  text-align: center;
  font-size: 0.9rem;
  opacity: 0;
}

nav li a:before {
  content: '';
  width: 70px;
  height: 2px;
  background-color: #fff;
  position: absolute;
  top: 50%;
  left: 0;
  z-index: 100;
  -webkit-transform: translateX(-100%);
  -ms-transform: translateX(-100%);
  transform: translateX(-100%);
  opacity: 0;
  -webkit-transition: all .2s linear;
  transition: all .2s linear;
}

nav li a:after {
  content: attr(data-content);
  font-size: 0.7rem;
  -webkit-transition: all .2s linear;
  transition: all .2s linear;
  opacity: 0;
  position: absolute;
  z-index: 100;
  color: #fff;
  display: block;
  margin-right: auto;
  margin-left: auto;
  left: 0;
  right: 0;
  bottom: -50px;
  text-transform: none;
  font-family: 'Open sans', sans-serif;
  font-weight: 300;
  font-style: italic;
  letter-spacing: 0;
}

nav li a:hover:before {
  -webkit-transform: translateX(0);
  -ms-transform: translateX(0);
  transform: translateX(0);
  opacity: 1;
}

nav li a:hover:after {
  -webkit-transform: translateY(15px);
  -ms-transform: translateY(15px);
  transform: translateY(15px);
  opacity: 1;
}

nav li:nth-of-type(1) {
  background-color: #29363B
}

nav li:nth-of-type(2) {
  background-color: #EA495F
}

nav li:nth-of-type(3) {
  background-color: #F4837D
}

nav li:nth-of-type(4) {
  background-color: #FDCEA9
}

nav li:nth-of-type(5) {
  background-color: #99B998
}


/* ====================================
Burger king
==================================== */

.open-overlay {
  position: absolute;
  right: 5rem;
  top: 3.2rem;
  z-index: 100;
  width: 34px;
  display: block;
  cursor: pointer;
}

.open-overlay span {
  display: block;
  height: 1px;
  background-color: #fff;
  cursor: pointer;
  margin-top: 8px;
}

.animate-top-bar {
  -webkit-animation: animate-top-bar .6s linear 1 both;
  animation: animate-top-bar .6s linear 1 both
}

.animate-bottom-bar {
  -webkit-animation: animate-bottom-bar .6s linear 1 both;
  animation: animate-bottom-bar .6s linear 1 both
}

.animate-middle-bar {
  -webkit-animation: animate-middle-bar .6s linear 1 both;
  animation: animate-middle-bar .6s linear 1 both
}

.animate-out-top-bar {
  -webkit-animation: animate-out-top-bar .6s linear 1 both;
  animation: animate-out-top-bar .6s linear 1 both
}

.animate-out-bottom-bar {
  -webkit-animation: animate-out-bottom-bar .6s linear 1 both;
  animation: animate-out-bottom-bar .6s linear 1 both
}

.animate-out-middle-bar {
  -webkit-animation: animate-out-middle-bar .6s linear 1 both;
  animation: animate-out-middle-bar .6s linear 1 both
}


/* ====================================
Animation keyframes
==================================== */

@keyframes animate-top-bar {
  0% {
    background-color: #fff;
  }
  50% {
    -webkit-transform: translateY(9px);
    transform: translateY(9px)
  }
  80% {
    -webkit-transform: translateY(5px);
    transform: translateY(5px);
    background-color: #fff
  }
  100% {
    -webkit-transform: translateY(0);
    transform: translateY(0);
    background-color: #29363B;
  }
}

@keyframes animate-bottom-bar {
  0% {
    background-color: #fff;
  }
  50% {
    -webkit-transform: translateY(-9px);
    transform: translateY(-9px)
  }
  80% {
    -webkit-transform: translateY(-5px);
    transform: translateY(-5px);
    background-color: #fff;
  }
  100% {
    -webkit-transform: translateY(0);
    transform: translateY(0);
    background-color: #29363B;
  }
}

@keyframes animate-middle-bar {
  0% {
    background-color: #fff;
  }
  80% {
    background-color: #fff;
  }
  100% {
    background-color: #29363B;
  }
}

@keyframes animate-out-top-bar {
  0% {
    background-color: #29363B
  }
  50% {
    -webkit-transform: translateY(9px);
    transform: translateY(9px)
  }
  80% {
    -webkit-transform: translateY(5px);
    transform: translateY(5px);
    background-color: #29363B
  }
  100% {
    -webkit-transform: translateY(0);
    transform: translateY(0);
    background-color: #FFF;
  }
}

@keyframes animate-out-bottom-bar {
  0% {
    background-color: #29363B
  }
  50% {
    -webkit-transform: translateY(-9px);
    transform: translateY(-9px)
  }
  80% {
    -webkit-transform: translateY(-5px);
    transform: translateY(-5px);
    background-color: #29363B;
  }
  100% {
    -webkit-transform: translateY(0);
    transform: translateY(0);
    background-color: #FFF;
  }
}

@keyframes animate-out-middle-bar {
  0% {
    background-color: #29363B
  }
  80% {
    background-color: #29363B;
  }
  100% {
    background-color: #fff;
  }
}

.home a {
  font-family: "Work Sans", sans-serif;
  color: #222;
  font-weight: 300;
  font-size: 12px;
  text-transform: uppercase;
  text-decoration: none;
  position: absolute;
  z-index: 10;
  top: 50px;
  left: 50px;
  padding-bottom: 3px;
  border-bottom: 1px solid #222;
}

@media (max-width: 640px) {
  nav ul {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
  }
  nav ul li {
    height: 20%;
  }
  nav ul li a {
    font-size: 11px;
  }
  nav li a:after {
    font-size: 0.6rem;
    bottom: -25px;
  }
  nav li a:hover:after {
    transform: translateY(0);
  }
  .open-overlay {
    right: 1rem;
  }
  nav li a:before {
    width: 25px;
  }
}

velocity-js-fullscreen-flexbox-overlay-navigation.markdown

Velocity.js fullscreen flexbox overlay navigation

Another take on my flexbox fullscreen overlay navigation. Spicing things up with a bit of Velocity.js

A Pen by Mirko Zorić on CodePen.

License.