index.html

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Hidden Search Widget</title>
    <meta name="description" content="">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.1.1/css/all.min.css" integrity="sha512-KfkfwYDsLkIlwQp6LFnl8zNdLGxu9YAA1QvwINks4PhcElQSvqcyVLLD9aMhXd13uQjoXtEKNosOWaZqXgel0g==" crossorigin="anonymous" referrerpolicy="no-referrer"
    />
    <link rel="stylesheet" href="search.css">
</head>

<body>
    <div class="search">
        <input type="text" class="input" placeholder="Search...">
        <button class="btn">
        <i class="fas fa-search"></i>
    </button>
    </div>

    <script src="search.js" async defer></script>
</body>

</html>