Q: Bootstrap3 nav mobile collapse doesn't work properly in chrome I'm just following a bootstrap tutorial, but I got stuck with some weird thing.
chrome and safari show mobile collapse differently with the same code.
I even tried 'copy and paste'!!
this is mobile nav-collapse on safari which it is a correct view.

but on chrome, it just doesn't work somehow.
this is the same one on chrome.

i got no error on console.
I used bower to download jquery and bootstrap.
this is the html code. 
main.js and main.css are just empty files. 
this is just a very basic bootstrap... but I don't know why..
how can I fix it? 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <!-- Set the viewport so this responsive site displays correctly on mobile devices -->
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap 3 Responsive Design Tutorial | RevillWeb.com</title>
    <!-- Include bootstrap CSS -->
        <link rel="stylesheet" href="/bower_components/bootstrap/dist/css/bootstrap.css">
        <link rel="stylesheet" href="/assets/main.css">
</head>
<body>
<!-- Site header and navigation -->
    <header class="top" role="header">
        <div class="container">
            <a href="#" class="navbar-brand pull-left">
                BS3 TUTORIAL
            </a>
            <button class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
                <span class="glyphicon glyphicon-align-justify"></span>
            </button>
            <nav class="collapse navbar-collapse" role="navigation">
                <ul class="navbar-nav nav">
                    <li><a href="#">Home</a></li>
                    <li><a href="#">About</a></li>
                    <li><a href="#">Contact</a></li>
                </ul>
            </nav>
        </div>
    </header>
<!-- Include jQuery and bootstrap JS plugins -->
<script src="/bower_components/jquery/dist/jquery.min.js"></script>
<script src="/bower_components/bootstrap/dist/js/bootstrap.min.js"></script>
<script src="/assets/main.js"></script>
</body>
</html>

