[BootStrap 4] : Cacher "sidebar" par défaut

Bonjour, j'ai créé cette sidebar (collapsible), mais elle s'affiche par défaut, cependant, j'aimerais la cacher par défaut.

Voici le code HTML :

Code:

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<!DOCTYPE html>
 
<html >
    <head>
          <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
    <meta name="viewport"  content=" width=device-width, initial-scale=1, shrink-to-fit=no" charset="utf-8">
    <title>bootstrap</title>
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
        <link href="exemple.css"; rel="stylesheet" >
 
    </head>
 
<body >
    <div   class=" wrapper ">
 
        <!--sidebar-->
        <nav  id="sidebar" >
 
            <div  class="sticky-top">
                <div  style="height: 57px;" class="sticky-top sidebar-header">
                    <h4>SIDEBAR</h4>
                </div>
            </div>
        </nav>
          <!-- contenu -->
            <div class="w-100 ">
                <nav class="sticky-top navbar navbar-expand-lg navbar-dark bg-dark pt-3 pb-0 ">
 
            <div class="w-100 container-fluid">
                    <button type="button" id="sidebarCollapse" class="btn btn-light " data-target="#sidebar" >
                        <i class="fas fa-align-left"></i>
                        <span></span>
                        <span></span>
                        <span></span>
                    </button>
 
 
             <a class="ml-2 text-capitalize font-weight-bold pl-2 navbar-brand" href="../boot.html">SIDEBAR  </a>
 
 
            <div  class="collapse navbar-collapse" id="navbarText">
 
            <div  class="ml-5  dropdown">
            <a class=" btn btn-sm btn-secondary dropdown" href="#" role="button" id="dropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
            Menu principal
            </a>
 
            </div>
 
                </div>
                    </div>
                </nav>
        </div>
    </div>
</body>
 
            <script >
            $(document).ready(function () {
 
                $('#sidebarCollapse').on('click', function () {
                    $('#sidebar').toggleClass('active');
                });
 
            });
            </script>
</html>

et le CSS si besoin :

Code:

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nav {
    border-bottom : 1px black solid; 
    -webkit-box-shadow: 1px 2px 5px 1px rgba(186,186,186,0.91); 
    box-shadow: 1px 2px 5px 1px rgba(186,186,186,0.91);
}
 
 
 
/* sidebar */
 
.wrapper {
    display: flex;
    width: 100%;
    align-items: stretch;
}
#sidebar {
    min-width: 250px;
    max-width: 250px;
 
}
#sidebar.active {
    margin-left: -250px;
 
 
}
 
 
#sidebar {
    min-width: 250px;
    max-width: 250px;
    min-height: 100vh;
}
a[data-toggle="collapse"] {
    position: relative;
}
.dropdown-toggle::after {
    display: block;
    position: absolute;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
}
@media (max-width: 768px) {
    #sidebar {
        margin-left: -250px;
    }
    #sidebar.active {
        margin-left: 0;
    }
}
@import "https://fonts.googleapis.com/css?family=Poppins:300,400,500,600,700";
body {
    font-family: 'Poppins', sans-serif;
    background: #fafafa;
}
p {
    font-family: 'Poppins', sans-serif;
    font-size: 1.1em;
    font-weight: 300;
    line-height: 1.7em;
    color: #999;
}
a, a:hover, a:focus {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s;
}
#sidebar {
    /* don't forget to add all the previously mentioned styles here too */
    background: #566573 ;
    color: #fff;
    transition: all 0.6s;
 
}
#sidebar .sidebar-header {
    padding: 20px;
    background: #343a40 ;
}
#sidebar ul.components {
    padding: 20px 0;
    border-bottom: 1px solid #47748b;
}
#sidebar ul p {
    color: #fff;
    padding: 10px;
}
#sidebar ul li a {
    padding: 10px;
    font-size: 1.1em;
    display: block;
}
#sidebar ul li a:hover {
    color: #566573;
    background: #fff;
}
#sidebar ul li.active > a, a[aria-expanded="true"] {
    color: #fff;
    background: #343a40 ;
}
ul ul a {
    font-size: 0.9em !important;
    padding-left: 30px !important;
    background: #343a40 ;
}

Merci d'avance !