好吧，我被难住了。我的导航栏和里面的一切都正常工作，但后来客户想要一些更改，现在，切换不起作用。它已经完全消失了，但现在我把它拿回来了，但它不会打开。我已经为不同的js文件复制了所有我能复制的东西，现在我不知道哪一个是正确的。我包含了html和js文件的代码。我知道我不需要它们，但现在我不知道哪一个我不需要。这是Bootstrap v3.4.1
<div class="container-fluid">
<nav class="navbar navbar-expand-lg navbar-default navbar-custom bg-light">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle navbar-toggle-right collapsed" data-toggle="collapse" data-target="#header-menu">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="index.html">Feed My Sheep Ministries</a>
</div>
<div id="navbar" class="navbar-collapse collapse">
<ul class="nav nav-link navbar-nav">
<li class="active"><a href="index.html">Home</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">About <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="about_us.shtml">About Us</a></li>
<li><a href="statement_of_faith.shtml">Statement of Faith</a></li>
</ul>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Church <span class="caret"></span></a>
<ul class="dropdown-menu open">
<li><a href="church_service.shtml">Church Service</a></li>
<li><a href="pastor_bruce_hood.shtml">Pastor Bruce Hood</a></li>
<li><a href="gallery.shtml">Gallery</a></li>
</ul>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Events<span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="calendar.shtml">Calendar of Events</a></li>
<li><a href="mens_recovery.shtml">Men's Recovery</a></li>
<li><a href="Fresno_feed_hungry.shtml">Feed Fresno Hungry</a></li>
<li><a href="thrift_store.shtml">Thrift Store</a></li>
<li><a href="fairs_carnivals.shtml">Fairs and Carnivals</a></li>
<li><a href="car_bike_shows.shtml">Bike Shows</a></li>
<li><a href="car_show.shtml">Car Shows</a></li>
<li><a href="March_against_Meth.shtml">March Against Methamphetamine</a></li>
</ul>
</li>
<li><a href="prayer.shtml">Prayer</a></li>
<li><a href="eternal_life.shtml">Eternal Life</a></li>
<li><a href="donations.shtml">Give</a></li>
<li><a href="contact.shtml">Contact</a></li>
</ul>
</div>
</div>
</nav>
</div>
</div>
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/js/select2.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/css/select2.min.css" rel="stylesheet"/>
<script src="https://code.jquery.com/jquery.js"></script>
<script src="../assets/js/bootstrap.min.js"></script>
<!-- Placed at the end of the document so the pages load faster -->
<script src="../assets/js/jquery.js"></script>
<script src="../assets/js/bootstrap-transition.js"></script>
<script src="../assets/js/bootstrap-alert.js"></script>
<script src="../assets/js/bootstrap-modal.js"></script>
<script src="../assets/js/bootstrap-dropdown.js"></script>
<script src="../assets/js/bootstrap-scrollspy.js"></script>
<script src="../assets/js/bootstrap-tab.js"></script>
<script src="../assets/js/bootstrap-tooltip.js"></script>
<script src="../assets/js/bootstrap-popover.js"></script>
<script src="../assets/js/bootstrap-button.js"></script>
<script src="../assets/js/bootstrap-collapse.js"></script>
<script src="../assets/js/bootstrap-carousel.js"></script>
<script src="../assets/js/bootstrap-typeahead.js"></script>
<script>
!function ($) {
$(function(){
// carousel demo
$('#myCarousel').carousel()
})
}(window.jQuery)
</script>
<script src="../assets/js/holder/holder.js"></script>
您不使用两次相同的jquery库
jquery.min.js"
jquery.js