버튼을 클릭하면 중앙에서 외곽으로 다른 색상의 원이 퍼져나간다.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://cdn.tailwindcss.com"></script>
<link href="https://cdn.jsdelivr.net/npm/daisyui@4.12.10/dist/full.min.css" rel="stylesheet" type="text/css" />
<style>
#btn--cta::after {
content: "";
position: absolute;
background-color: rgba(255, 255, 255, 0.3);
border-radius: 50%;
pointer-events: none;
top: 50%;
left: 50%;
width: 5px;
height: 5px;
opacity: 0;
transform: translate(-50%, -50%) scale(1);
transition: opacity 1s, transform 0.5s ease-out;
}
#btn--cta:active::after {
opacity: 1;
transform: translate(-50%, -50%) scale(100);
transition: transform 0.5s ease-out;
}
</style>
</head>
<body class="w-screen h-screen flex justify-center items-center">
<button id="btn--cta" class="btn btn-primary m-auto">버튼</button>
</body>
</html>