Gradient Button Animation Effects on Hover with HTML & CSS

07/03/2020
Demo
Video Tutorial
Code
HTML
<!DOCTYPE html>
<html>
<head>
<title>Gradient Button Animation Effects on Hover</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div id="container">
<button>SUBSCRIBE</button>
</div>
</body>
</html>
CSS
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400&display=swap');
body {
margin: 0;
padding: 0;
font-family: 'Roboto', sans-serif;
background: #000326;
}
#container {
width: 100%;
height: 100vh;
display: flex;
align-items: center;
justify-content: center;
}
button {
position: relative;
cursor: pointer;
border: none;
width: 300px;
height: 80px;
border-radius: 50px;
outline: none;
background: linear-gradient(90deg, #EC37D0, #D92B2B, #FFAA0D, #EC37D0);
background-size: 400%;
color: #fff;
font-size: 24px;
letter-spacing: 4px;
}
button::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
z-index: -1;
background: linear-gradient(90deg, #EC37D0, #D92B2B, #FFAA0D, #EC37D0);
background-size: 400%;
border-radius: 50px;
opacity: 0;
transition: .5s;
}
button:hover {
animation: animate 10s linear infinite;
}
button:hover::before {
filter: blur(25px);
opacity: .8;
animation: animate 10s linear infinite;
}
@keyframes animate {
0% {
background-position: 0%;
}
100% {
background-position: 400%;
}
}