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HTML 

              
                <!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Bootstrap 5 Side Bar Navigation</title>
  <!-- bootstrap 5 css -->
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous" />
  <!-- BOX ICONS CSS-->
  <link href="https://cdn.jsdelivr.net/npm/boxicons@2.0.5/css/boxicons.min.css" rel="stylesheet" />
  <!-- custom css -->
  <link rel="stylesheet" href="style.css" />
</head>

<body>
  <!-- Side-Nav -->
  <div class="side-navbar active-nav d-flex justify-content-between flex-wrap flex-column" id="sidebar">
    <ul class="nav flex-column text-white w-100">
      <a href="#" class="nav-link h3 text-white my-2">
        Responsive </br>SideBar Nav
      </a>
      <li href="#" class="nav-link">
        <i class="bx bxs-dashboard"></i>
        <span class="mx-2">Home</span>
      </li>
      <li href="#" class="nav-link">
        <i class="bx bx-user-check"></i>
        <span class="mx-2">Profile</span>
      </li>
      <li href="#" class="nav-link">
        <i class="bx bx-conversation"></i>
        <span class="mx-2">Contact</span>
      </li>
    </ul>

    <span href="#" class="nav-link h4 w-100 mb-5">
      <a href=""><i class="bx bxl-instagram-alt text-white"></i></a>
      <a href=""><i class="bx bxl-twitter px-2 text-white"></i></a>
      <a href=""><i class="bx bxl-facebook text-white"></i></a>
    </span>
  </div>

  <!-- Main Wrapper -->
  <div class="p-1 my-container active-cont">
    <!-- Top Nav -->
    <nav class="navbar top-navbar navbar-light bg-light px-5">
      <a class="btn border-0" id="menu-btn"><i class="bx bx-menu"></i></a>
    </nav>
    <!--End Top Nav -->
    <h3 class="text-dark p-3">RESPONSIVE SIDEBAR NAV 💻 📱
    </h3>
    <p class="px-3">Responsive navigation sidebar built using <a class="text-dark" href="https://getbootstrap.com/">Bootstrap 5</a>.</p>
    <p class="px-3"><a href="https://github.com/harshitjain-hj" class="text-dark">Checkout my Github</a></p>
  </div>

  <!-- bootstrap js -->
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/js/bootstrap.bundle.min.js" integrity="sha384-b5kHyXgcpbZJO/tY9Ul7kGkf1S0CWuKcCD38l8YkeH8z8QjE0GmW1gYU5S9FOnJ0" crossorigin="anonymous"></script>
</body>

</html>
!

CSS 

              
                * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  background-color: #fff;
}

.side-navbar {
  width: 250px;
  height: 100%;
  position: fixed;
  margin-left: -300px;
  background-color: #100901;
  transition: 0.5s;
}

.nav-link:active,
.nav-link:focus,
.nav-link:hover {
  background-color: #ffffff26;
}

.my-container {
  transition: 0.4s;
}

.active-nav {
  margin-left: 0;
}

/* for main section */
.active-cont {
  margin-left: 250px;
}

#menu-btn {
  background-color: #100901;
  color: #fff;
  margin-left: -62px;
}

.my-container input {
  border-radius: 2rem;
  padding: 2px 20px;
}
!

JS 

              
                var menu_btn = document.querySelector("#menu-btn");
var sidebar = document.querySelector("#sidebar");
var container = document.querySelector(".my-container");
menu_btn.addEventListener("click", () => {
  sidebar.classList.toggle("active-nav");
  container.classList.toggle("active-cont");
});
!
999px

Console