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HTML 

              
                <!-- Updated 4.6.2016 added Pure JS and jQuery Support-->
<body>
  <div class="overlay">
  <a class="mk-search-trigger mk-fullscreen-trigger" href="#" style="display: table-cell; padding: 0 30px 0 20px; vertical-align: middle;" id="search-button-listener">
    <div id="search-button"><i class="fa fa-search"></i></div>
  </a>
  <div class="mk-fullscreen-search-overlay" id="mk-search-overlay">
    <a href="#" class="mk-fullscreen-close" id="mk-fullscreen-close-button"><i class="fa fa-times"></i></a>
    <div id="mk-fullscreen-search-wrapper">
      <form method="get" id="mk-fullscreen-searchform" action="">
        <input type="text" value="" placeholder="Search..." id="mk-fullscreen-search-input">
        <i class="fa fa-search fullscreen-search-icon"><input value="" type="submit"></i>
      </form>
    </div>
  </div>
  </div>
</body>
!

CSS 

              
                /*Creator: Ryan Tarson Website: ryantarson.com updated 6.16.16 added fixed issues with chrome outline also new animations, also preformance update*/
/* Body Styling and Search icon */
@import url(//netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.css);
body,
html{
  width: 100%;
  height: 100%;
}
body{
	background: url('https://images.unsplash.com/photo-1444090695923-48e08781a76a?ixlib=rb-0.3.5&q=85&fm=jpg&crop=entropy&cs=srgb&s=cb58d4212ead01ed72fdffd6b78601ab') center no-repeat;
	background-size: cover;
	margin: 0;
}
.overlay{
	height: 100%;
	width: 100%;
	background: rgba(0, 0, 0, 0.8);
	
}

.mk-search-trigger {
  position: absolute;
  top: 45%;
  left: 45%;
}


/* Search Overlay */

.mk-fullscreen-search-overlay #mk-fullscreen-search-wrapper #mk-fullscreen-searchform input[type=submit] {
  position: absolute;
  width: 100px;
  height: 100%;
  background-color: transparent;
  border: 0;
  right: 0;
  top: 0;
}
#mk-fullscreen-searchform:focus{
  outline: none;
  border: none;
}

.mk-fullscreen-search-overlay #mk-fullscreen-search-wrapper #mk-fullscreen-searchform .fullscreen-search-icon {
  font-size: 25px;
  position: absolute;
  right: 15px;
  width: 25px;
  top: 30px;
  color: #fff;
  color: rgba(255, 255, 255, .2);
  -webkit-transition: all .2s ease-out;
  -moz-transition: all .2s ease-out;
  -ms-transition: all .2s ease-out;
  -o-transition: all .2s ease-out;
  transition: all .2s ease-out;
}
.fullscreen-search-icon:hover,
.fullscreen-search-icon:focus{
  border: none;
  outline: none;
  color: #fff !important;
  -webkit-transition: transform ease-out .2s;
  -moz-transition: transform ease-out .2s;
  -ms-transition: transform ease-out .2s;
  -o-transition: transform ease-out .2s;
  transition: transform ease-out .2s;
  transform: rotate(180deg);
}

#mk-fullscreen-searchform {
  position: relative;
  verticle-align: middle;
}

.mk-fullscreen-search-overlay #mk-fullscreen-search-wrapper #mk-fullscreen-searchform #mk-fullscreen-search-input {
  width: 800px;
  background-color: transparent;
  -webkit-box-shadow: 0 3px 0 0 rgba(255, 255, 255, .1);
  -moz-box-shadow: 0 3px 0 0 rgba(255, 255, 255, .1);
  box-shadow: 0 3px 0 0 rgba(255, 255, 255, .1);
  border: 0;
  text-align: center;
  font-size: 35px;
  padding: 20px;
  color: #fff;
  -webkit-transition: all .3s ease-out;
  -moz-transition: all .3s ease-out;
  -ms-transition: all .3s ease-out;
  -o-transition: all .3s ease-out;
  transition: all .3s ease-out;
}
.mk-fullscreen-search-overlay #mk-fullscreen-search-wrapper #mk-fullscreen-searchform #mk-fullscreen-search-input:focus{
  boder: none;
  outline: none;
}

.mk-fullscreen-search-overlay.mk-fullscreen-search-overlay-show {
  visibility: visible;
  opacity: 1;
}

.mk-fullscreen-search-overlay {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  opacity: 0;
  visibility: hidden;
  background-color: rgba(0, 0, 0, .94);
  text-align: center;
  -webkit-transition: all ease-in-out .25s;
  -moz-transition: all ease-in-out .25s;
  -ms-transition: all ease-in-out .25s;
  -o-transition: all ease-in-out .25s;
  transition: all ease-in-out .25s;
}

.mk-animate-element,
.mk-effect-bg-layer,
.mk-fullscreen-search-overlay {
  -webkit-transform: translateZ(0);
  -ms-transform: translateZ(0);
  transform: translateZ(0);
}

.mk-fullscreen-search-overlay {
  z-index: 999;
}

.mk-fullscreen-search-overlay .mk-fullscreen-close:link,
.mk-fullscreen-search-overlay .mk-fullscreen-close:visited {
  color: #fff;
}

.mk-fullscreen-search-overlay .mk-fullscreen-close {
  position: absolute;
  right: 50px;
  top: 70px;
  font-size: 26px;
  -webkit-transition: transform ease-out .2s;
  -moz-transition: transform ease-out .2s;
  -ms-transition: transform ease-out .2s;
  -o-transition: transform ease-out .2s;
  transition: transform ease-out .2s;
  transform: rotate(0deg);
}

.mk-fullscreen-search-overlay.mk-fullscreen-search-overlay-show #mk-fullscreen-search-wrapper {
  opacity: 1;
  visibility: visible;
  -webkit-transform: scale(1);
  -moz-transform: scale(1);
  -ms-transform: scale(1);
  -o-transform: scale(1);
  transform: scale(1);
  ms-transform: scale(1);
}

.mk-fullscreen-search-overlay #mk-fullscreen-search-wrapper {
  display: inline-block;
  max-width: 1000px;
  vertical-align: middle;
  text-align: center;
  font-size: 18px;
  -webkit-transform: scale(0.9);
  -moz-transform: scale(0.9);
  -ms-transform: scale(0.9);
  -o-transform: scale(0.9);
  transform: scale(0.9);
  ms-transform: scale(0.9);
  opacity: 0;
  visibility: hidden;
  -webkit-transition: all ease-in-out .3s;
  -moz-transition: all ease-in-out .3s;
  -ms-transition: all ease-in-out .3s;
  -o-transition: all ease-in-out .3s;
  transition: all ease-in-out .3s;
}

.mk-search-trigger {
  -webkit-transition: color .2s ease-in-out;
  -moz-transition: color .2s ease-in-out;
  -ms-transition: color .2s ease-in-out;
  -o-transition: color .2s ease-in-out;
  transition: color .2s ease-in-out
}
/* Search Button */
#search-button {
  display: relative;
  vertical-align: middle;
  height: 50px;
  width: 40px;
  border: white solid 0.7px;
  border-radius: 50%;
  cursor: pointer;
  opacity: 1;
  padding-right: 10px;
  -webkit-transition: all 400ms;
  -moz-transition: all 400ms;
  -ms-transition: all 400ms;
  -o-transition: all 400ms;
  -webkit-transform: rotate(0deg);
  -moz-transform: rotate(0deg);
  -ms-transform: rotate(0deg);
  -o-transform: rotate(0deg);
  transform: rotate(0deg);
}
#search-button i{
  color: white !important;
  font-size: 20px;
  position: absolute;
  left: 15px;
  top: 15px;
}

#search-button:hover,
.mk-fullscreen-close:hover {
  opacity: 0.6;
  -webkit-transform: rotate(180deg);
  -moz-transform: rotate(180deg);
  -ms-transform: rotate(180deg);
  -o-transform: rotate(180deg);
  transform: rotate(180deg);
  -webkit-transition: all 400ms;
  -moz-transition: all 400ms;
  -ms-transition: all 400ms;
  -o-transition: all 400ms;
}
#mk-fullscreen-search-input:focus{
  box-shadow: 0px 3px 0px 0px rgba(255,255,255,0.54) !important;
}
!

JS 

              
                //Program created by Ryan Tarson Updated 6.15.16, under this code is my pure JS Version
jQuery(document).ready(function($) {
  var wHeight = window.innerHeight;
  //search bar middle alignment
  $('#mk-fullscreen-searchform').css('top', wHeight / 2);
  //reform search bar
  jQuery(window).resize(function() {
    wHeight = window.innerHeight;
    $('#mk-fullscreen-searchform').css('top', wHeight / 2);
  });
  // Search
  $('#search-button').click(function() {
    console.log("Open Search, Search Centered");
    $("div.mk-fullscreen-search-overlay").addClass("mk-fullscreen-search-overlay-show");
  });
  $("a.mk-fullscreen-close").click(function() {
    console.log("Closed Search");
    $("div.mk-fullscreen-search-overlay").removeClass("mk-fullscreen-search-overlay-show");
  });
});

/* Don't Like jQuery or have a custom jQuery that's conflicting? Then you can use my Pure JS program Below. Runs exactly the same and so is the preformance just Pure JS*/
//Program made by Ryan Tarson
/*
 var wHeight = window.innerHeight;
 var sb = document.getElementById("search-button");
 var closeSB = document.getElementById("mk-fullscreen-close-button");
 var SearchOverlay = document.getElementById("mk-search-overlay");
 var searchBar = document.getElementById("mk-fullscreen-searchform");
 searchBar.style.top=wHeight/2 +'px';
  console.log(wHeight);
  window.addEventListener("resize", function(){
	  console.log(wHeight);
	   wHeight = window.innerHeight;
	   searchBar.style.top=wHeight/2 + 'px';
  }, true);
  document.addEventListener("click", function(){
  sb.onclick = function(){
	console.log("Opened Search for Element: ");
	SearchOverlay.classList.add("mk-fullscreen-search-overlay-show");
  };
  closeSB.onclick = function(){
	  console.log("Closed Search for Element: " + closeSB);
	  SearchOverlay.classList.remove("mk-fullscreen-search-overlay-show");
  };
  }, true);
  */
!
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