Bonjour j'ai un soucis sur mon site j'ai créer une nav bar qui fonctionne sur la page d’accueil mais pas sur les autre page en responsive le dropdown ne s'ouvre pas je vous montre le code de la page d'accueil et d'une autre page et merci pour votre aide
une autre page
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Mon sitee</title>
<link rel="stylesheet" href="assets/bootstrap/css/bootstrap.min.css">
<link rel="stylesheet" href="assets/css/styles.min.css">
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body style="color:rgb(0,0,0);background-color:rgb(0,0,0);">
<div>
<nav class="navbar navbar-light navbar-expand-md navigation-clean" style="background-color:#000000;">
<div class="container"><a class="navbar-brand text-white" href="#">Jules</a><button class="navbar-toggler" data-toggle="collapse" data-target="#navcol-1" style="background-color:#ffffff;color:rgba(136,136,136,0);"><span class="sr-only">Toggle navigation</span><span class="navbar-toggler-icon" style="background-color:rgba(0,0,0,0);"></span></button>
<div
class="collapse navbar-collapse" id="navcol-1">
<ul class="nav navbar-nav ml-auto">
<li class="nav-item" role="presentation"><a class="nav-link text-white" href="Accueil.html">Accueil</a></li>
<li class="nav-item" role="presentation"><a class="nav-link text-white" href="portofolio.html">Portofolio</a></li>
<li class="nav-item" role="presentation"><a class="nav-link text-white" href="contact.html">Contact</a></li>
<div class="dropdown-menu" role="menu"><a class="dropdown-item" role="presentation" href="#">First Item</a><a class="dropdown-item" role="presentation" href="#">Second Item</a><a class="dropdown-item" role="presentation" href="#">Third Item</a></div>
</ul>
</div>
</div>
</nav>
</div>
<div class="header">
<h1 class="header-title">Mon site internet</h1>
<p class="header-para">Je suis un étudiant passionné par la photographie et le développement web </p>
</div>
<div class="macouleur"> jjjj
</div>
<script src="assets/js/jquery.min.js"></script>
<script src="assets/bootstrap/js/bootstrap.min.js"></script>
</body>
</html>
une autre page
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Mon sitee</title>
<link rel="stylesheet" href="assets/bootstrap/css/bootstrap.min.css">
<link rel="stylesheet" href="assets/css/styles.min.css">
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body style="color:rgb(0,0,0);background-color:rgb(0,0,0);">
<div>
<nav class="navbar navbar-light navbar-expand-md navigation-clean" style="background-color:#000000;">
<div class="container"><a class="navbar-brand text-white" href="#"></a><button class="navbar-toggler" data-toggle="collapse" data-target="#navcol-1" style="background-color:#ffffff;color:rgba(136,136,136,0);"><span class="sr-only">Toggle navigation</span><span class="navbar-toggler-icon" style="background-color:rgba(0,0,0,0);"></span></button>
<div class="collapse navbar-collapse" id="navcol-1">
<ul class="nav navbar-nav ml-auto">
<li class="nav-item" role="presentation"><a class="nav-link text-white" href="Accueil.html">Accueil</a></li>
<li class="nav-item" role="presentation"><a class="nav-link text-white" href="portofolio.html">Portofolio</a></li>
<li class="nav-item" role="presentation"><a class="nav-link text-white" href="contact.html">Contact</a></li>
</ul>
<div class="dropdown-menu" role="menu"><a class="dropdown-item" role="presentation" href="#">First Item</a><a class="dropdown-item" role="presentation" href="#">Second Item</a><a class="dropdown-item" role="presentation" href="#">Third Item</a></div>
</nav>
</div>
</div>
</body>
</html>