Почему не работает меню бургера?

Question

Остап Беллик @Ost123

Программист, эникейщик

Почему не работает меню бургера?

Доброго времени суток! Делаю сайт с ааптивной версткой и соткнулся с одной проблемой: когда адаптировал карусель вместе с меню бургера соткнулся с такой проблемой (есть на видео), вот исходники:

index.php

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <!-- Bootstrap CSS -->
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">
    <link rel="preconnect" href="https://fonts.gstatic.com">
    <link href="https://fonts.googleapis.com/css2?family=Comfortaa:wght@300&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="css/style.css">
    <title>Кулінарні рецепти</title>
  </head>
  <body>
    <?php require('header.php'); ?>

    <div class="container">
    <div id="carouselExampleCaptions" class="carousel slide" data-bs-ride="carousel">
  <div class="carousel-indicators">
    <button type="button" data-bs-target="#carouselExampleCaptions" data-bs-slide-to="0" class="active" aria-current="true" aria-label="Slide 1"></button>
    <button type="button" data-bs-target="#carouselExampleCaptions" data-bs-slide-to="1" aria-label="Slide 2"></button>
    <button type="button" data-bs-target="#carouselExampleCaptions" data-bs-slide-to="2" aria-label="Slide 3"></button>
  </div>
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img id="image" src="images/myaso_eda_salat_blyudo_appetitnoe_70012_1920x1080.jpg" class="d-block w-100" alt="...">
      <div class="carousel-caption d-none d-md-block">
        <h5>First slide label</h5>
        <p>Some representative placeholder content for the first slide.</p>
      </div>
    </div>
    <div class="carousel-item">
      <img id="image" src="images/unnamed.jpg" class="d-block w-100" alt="...">
      <div class="carousel-caption d-none d-md-block">
        <h5>Second slide label</h5>
        <p>Some representative placeholder content for the second slide.</p>
      </div>
    </div>
    <div class="carousel-item">
      <img id="image" src="images/unnamed%20(1).jpg" class="d-block w-100" alt="...">
      <div class="carousel-caption d-none d-md-block">
        <h5>Third slide label</h5>
        <p>Some representative placeholder content for the third slide.</p>
      </div>
    </div>
  </div>
  <button class="carousel-control-prev" type="button" data-bs-target="#carouselExampleCaptions" data-bs-slide="prev">
    <span class="carousel-control-prev-icon" aria-hidden="true"></span>
    <span class="visually-hidden">Previous</span>
  </button>
  <button class="carousel-control-next" type="button" data-bs-target="#carouselExampleCaptions" data-bs-slide="next">
    <span class="carousel-control-next-icon" aria-hidden="true"></span>
    <span class="visually-hidden">Next</span>
  </button>
</div>
</div>    

    <!-- Optional JavaScript; choose one of the two! -->
    <script src="https://kit.fontawesome.com/acc7b07215.js" crossorigin="anonymous"></script>
    <!-- Option 1: Bootstrap Bundle with Popper -->
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js" integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf" crossorigin="anonymous"></script>
    <script src="js/script.js"></script>

    <!-- Option 2: Separate Popper and Bootstrap JS -->
    <!--
    <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.1/dist/umd/popper.min.js" integrity="sha384-SR1sx49pcuLnqZUnnPwx6FCym0wLsk5JZuNx2bPPENzswTNFaQU1RDvt3wT4gWFG" crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.min.js" integrity="sha384-j0CNLUeiqtyaRmlzUHCPZ+Gy5fQu0dQ6eZ/xAww941Ai1SxSY+0EQqNXNE6DZiVc" crossorigin="anonymous"></script>
    -->
  </body>
</html>

header.php

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <!-- Bootstrap CSS -->
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">
    <link rel="preconnect" href="https://fonts.gstatic.com">
    <link href="https://fonts.googleapis.com/css2?family=Comfortaa:wght@300&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="css/style.css">
    
  </head>
  <body>    
    <div class="head">
    <header>
		<div class="logo">
			<a href="/"><img class="graficlogo" src="images/chef_PNG53.png" width="100px" alt="logo">Кулінарні рецепти</a>
		</div>
	</header>
	<nav>
		<div class="topnav" id="myTopnav">
			<a href="/">Головна</a>
			<a href="about.php">Про нас</a>
			<a href="reg.php">Реєстраця</a>
			<a href="login.php">Авторизація</a>
			<a href="admin.php">Адмін-панель</a>
			<a id="menu" href="#" class="icon"><i class="fas fa-bars"></i></a>
		</div>
	</nav>
</div>
    <!-- Optional JavaScript<i class="fas fa-bars"></i>; choose one of the two! -->
    <script src="https://kit.fontawesome.com/acc7b07215.js" crossorigin="anonymous"></script>
    <!-- Option 1: Bootstrap Bundle with Popper -->
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js" integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf" crossorigin="anonymous"></script>
<script src="js/script.js"></script>
    <!-- Option 2: Separate Popper and Bootstrap JS -->
    <!--
    <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.1/dist/umd/popper.min.js" integrity="sha384-SR1sx49pcuLnqZUnnPwx6FCym0wLsk5JZuNx2bPPENzswTNFaQU1RDvt3wT4gWFG" crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.min.js" integrity="sha384-j0CNLUeiqtyaRmlzUHCPZ+Gy5fQu0dQ6eZ/xAww941Ai1SxSY+0EQqNXNE6DZiVc" crossorigin="anonymous"></script>
    -->
  </body>
</html>

style.css(фрагмент)

@media screen and (max-width: 768px){
    .responimg{
  margin-top: 200px;  
}
}

script.js

var menu = document.getElementById("menu");
menu.onclick = function myFunction() {
	var x = document.getElementById("myTopnav");
	if(x.className === "topnav") {
		x.className += " responsive";
	} 
	else{
		x.className = "topnav";
	}
}
        
    menu.onclick = function myFunction() {
	var image = document.getElementById("carouselExampleCaptions");
	if(image.className === "carousel slide") {
		image.className += " responimg";
	} 
	else{
		image.className = "carousel slide";
    

    }
	}