JSFiddle - React, Tailwind, and code Playground

HTML

<div class="submit">
				<input type="submit" value="OVDJE" class="button-blue hvr-shutter-out-horizontal" onclick="upisnik();"/>
</div>

CSS

.hvr-shutter-out-horizontal {
  display: block;
  vertical-align: middle;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  box-shadow: 0 0 1px rgba(0, 0, 0, 0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  background: #3498db;
  -webkit-transition-property: color;
  transition-property: color;
  -webkit-transition-duration: 0.5s;
  transition-duration: 0.5s;
}
.hvr-shutter-out-horizontal:before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: #fbfbfb;
  -webkit-transform: scaleX(0);
  transform: scaleX(0);
  -webkit-transform-origin: 50%;
  transform-origin: 50%;
  -webkit-transition-property: transform;
  transition-property: transform;
  -webkit-transition-duration: 0.5s;
  transition-duration: 0.5s;
  -webkit-transition-timing-function: ease-out;
  transition-timing-function: ease-out;
}
.hvr-shutter-out-horizontal:hover, .hvr-shutter-out-horizontal:focus, .hvr-shutter-out-horizontal:active {
  color: #3498db;
}
.hvr-shutter-out-horizontal:hover:before, .hvr-shutter-out-horizontal:focus:before, .hvr-shutter-out-horizontal:active:before {
  -webkit-transform: scaleX(1);
  transform: scaleX(1);
}

.button-blue{
	font-family: 'Montserrat', Arial, Helvetica, sans-serif;
	display:block;
	width: 100px;
	height: 35px;
	border: #fbfbfb solid 4px;
	cursor:pointer;
	background: #3498db;
	color:white;
	font-size:12px;
	padding-top:8px;
	padding-bottom:12px;
	margin-left:auto;
	margin-right:auto;
    font-weight:700;
}

.submit{
	display:inline;
	text-align:center;
	height:35px;
}