<html>
<head>
	<title>Cool Css Button Border Animation On Hover</title>
</head>
<body>
<h2>Cool Css Button Border Animation On Hover - CSS3 Hover Effects - Pure CSS</h2>

<a href="#"><span></span>Button</a>

</body>
</html>
/* common css */
body {
	margin: 0;
	padding: 0;
	background: #262626;
}

h2 {color: #fff; text-align: center;}

/* button hover amazing effect */
a {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	text-transform: uppercase;
	text-decoration: none;
	text-align: center;
	/* line-height: 2; */
	color: #ff0;
	font-size: 30px;
	font-family: verdana;
	letter-spacing: 4px;

	/* use combination of any two */
	/* 1. */
	/* padding: 5px; */

	/* 2. */
	padding-left: 5px;
	/* padding-right: 5px; */
}

a::before,
a::after,
span::before,
span::after {
	content: '';
	position: absolute;
	width: 8px;
	height: 8px;
	background: transparent;
	transition: 1s;
	/* -webkit-mix-blend-mode: hue; */
}

a::before {
	top: -2px;
	left: -2px;
	border-top: 2px solid #ff0;
	border-left: 2px solid #ff0;
}
a::after {
	top: -2px;
	right: -2px;
	border-top: 2px solid #ff0;
	border-right: 2px solid #ff0;
}

span::before {
	bottom: -2px;
	left: -2px;
	border-bottom: 2px solid #ff0;
	border-left: 2px solid #ff0;
}
span::after {
	bottom: -2px;
	right: -2px;
	border-bottom: 2px solid #ff0;
	border-right: 2px solid #ff0;
}


a:hover::before,
a:hover::after,
a:hover span::before,
a:hover span::after  {
	width: calc( 180px / 2);
	height: calc( 50px / 2);
}

External CSS

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External JavaScript

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