JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css">
<div class="nav-btn"> 
					<div id="sb-search" class="sb-search">
						<form>
							<input class="sb-search-input" placeholder="Enter your search term..." type="text" value="" name="search" id="search">
							<input class="sb-search-submit" type="submit" value="">
							<button class="sb-icon-search"><i class="fa fa-search"></i></button>
					</div>
				</div>

CSS

.sb-search {
	float: right;  
	position: relative;
	margin-top: 10px;
	width: 0%;
	min-width: 40px;
	height: 40px;
	overflow: hidden;
	-webkit-transition: width 0.3s;
	-moz-transition: width 0.3s;
	transition: width 0.3s;
	-webkit-backface-visibility: hidden;
}

.sb-search-input {
	position: absolute;
	top: 0;
	right: 0;
	border: none;
	outline: none;
	background: #fff;
	width: 100%;
	height: 40px;
	margin: 0;
	z-index: 10;
	padding: 20px 65px 20px 20px;
	font-family: inherit;
	font-size: 20px;
	color: #2c3e50;
}

.sb-search-input::-webkit-input-placeholder {
	color: #efb480;
}

.sb-search-input:-moz-placeholder {
	color: #efb480;
}

.sb-search-input::-moz-placeholder {
	color: #efb480;
}

.sb-search-input:-ms-input-placeholder {
	color: #efb480;
}

.fa.fa-search,
.sb-search-submit  {
	width: 40px;
	height: 40px;
	display: block;
	position: absolute;
	right: 0;
	top: 0;
	padding: 0;
	margin: 0;
	line-height: 60px;
	text-align: center;
	cursor: pointer;
}

.sb-search-submit {
	background: #fff; /* IE needs this */
	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)"; /* IE 8 */
    filter: alpha(opacity=0); /* IE 5-7 */
    opacity: 0;
	color: transparent;
	border: none;
	outline: none;
	z-index: -1;
}


.fa.fa-search {
	border: none;
	font-size: 22px;
	background: #efb480;
	z-index: 90;
	speak: none;
	font-style: normal;
	font-weight: normal;
	font-variant: normal;
	text-transform: none;
	-webkit-font-smoothing: antialiased;
}

/*.fa.fa-search:before {
	content: "\e000";
}*/

/* Open state */
.sb-search.sb-search-open,
.no-js .sb-search {
	width: 100%;
}

.sb-search.sb-search-open .fa.fa-search,
.no-js .sb-search .fa.fa-search {
	background: #da6d0d;
	color: #fff;
	z-index: 11;
}

.sb-search.sb-search-open .sb-search-submit,
.no-js .sb-search .sb-search-submit {
	z-index: 90;
}

JavaScript

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