JSFiddle - React, Tailwind, and code Playground
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Validacije u formi</title>
<style>
.input {
width: 200px;
}
</style>
</head>
<body>
<form action="">
<input type="text" placeholder="Polje ne smije biti prazno" required class="input">
<input type="email" placeholder="Napiši ispravnu mail adresu" required class="input">
<input type="submit">
</form>
</body>
</html>