<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div class="center">
<h2>Shake On Invalid Input</h2>
<input type="text" pattern="[a-z]*">
</div>
<style>
.center {
height: 97vh;
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
}
input[type=text] {
border: 3px solid #ccc;
height: 2rem;
width: 18rem;
}
input:invalid {
animation: shake 300ms;
}
@keyframes shake {
25% {
transform: translateX(4px);
}
50% {
transform: translateX(-4px);
}
75% {
transform: translateX(4px);
}
}
</style>
</body>
</html>
