I already have a side menù, I want him to change into a hamburger menù whenever the website is open by a mobile device. I also use bootstrap libraries, I dunno if it can help, it would be better using them. Here's an example of what I have:
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>example</title>
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Zenh87qX5JnK2Jl0vWa8Ck2rdkQ2Bzep5IDxbcnCeuOxjzrPF/et3URy9Bv1WTRi" crossorigin="anonymous">
<style>
div {
border: solid black 1px;
margin: 0 !important;
padding: 0 !important;
max-width: none !important;
width: 100%;
}
.menu {
text-align: center;
}
button {
margin: 20px;
}
</style>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-3">
<div class="menu">
<button>Content 1</button><br>
<button>Content 2</button><br>
<button>Content 3</button><br>
<button>Content 4</button><br>
<button>Content 5</button><br>
<button>Content 6</button><br>
<button>Content 7</button><br>
<button>Content 8</button>
</div>
</div>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-OERcA2EqjJCMA+/3y+gxIOqMEjwtxJY7qPCqsdltbNJuaOe923+mo//f6V8Qbsw3" crossorigin="anonymous"></script>
</body>
Since you're using Bootstrap, it's easier to do it with Bootstrap like this:
When used on a phone, the navigation menu folds into a hamburger. You can verify this, for example, using the developer tools (CTRL + SHIFT + I in Chrome).
Of course, you need to have some sort of search function for that search field or it won't work for you. You can also add a dropdown there, but you must also have JavaScript linked.