JSFiddle - React, Tailwind, and code Playground
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Validacije u formi</title>
</head>
<body>
<form action="">
<label for="dob">Tvoja dob</label>
<input type="number" id="dob" size="2" name="age" min="18" max="99" value="21"><br>
<br />
<input type="submit">
</form>
</body>
</html>