Bootstrap menu close automatically when expanded - html

Question

I wrote a media query that remove the hamburger menu automatically on a certain resolution but for some reason, when the menu is collapsed and I try to expand it, the menu is closing automatically, this is the code:
#media (min-width: 768px) {
.navbar-toggler {
display: none;
}
}
#media (max-width: 1200px) {
.navbar-header {
float: none;
}
.navbar-left,
.navbar-right {
float: none !important;
}
.navbar-toggler {
display: block;
}
.navbar-collapse {
border-top: 1px solid transparent;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}
.navbar-fixed-top {
top: 0;
border-width: 0 0 1px;
}
.navbar-collapse.collapse {
display: none !important;
}
.navbar-nav {
float: none !important;
margin-top: 7.5px;
}
.navbar-nav > li {
float: none;
}
.navbar-nav > li > a {
padding-top: 10px;
padding-bottom: 10px;
}
.collapse.in {
display: block !important;
}
}
<link href="https://cdn.jsdelivr.net/npm/bootstrap#4.5.3/dist/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#4.5.3/dist/js/bootstrap.bundle.min.js"></script>
<nav class="navbar navbar-inverse navbar-dark bg-dark static-top">
<div class="container">
<a class="navbar-brand" href="#">
<img src="http://placehold.it/150x50?text=Logo" alt="">
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarResponsive">
<ul class="navbar-nav ml-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home
<span class="sr-only">(current)</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Services</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contact</a>
</li>
</ul>
</div>
</div>
</nav>
as you can see this happen only when the menu is collapsed and I try to expand it, what I did wrong?

Answer 1

The problem is in the property:
#media (max-width: 1200px) {
/* ... */
.navbar-collapse.collapse {
display: none !important;
}
}
After the animation, Bootstrap adds a collapse class to your menu.
You're overwriting the default behavior hiding the menu for every resolution less than 1200px.
I hope this answer could help you! 😉
#media (min-width: 768px) {
.navbar-toggler {
display: none;
}
}
#media (max-width: 1200px) {
.navbar-header {
float: none;
}
.navbar-left,
.navbar-right {
float: none !important;
}
.navbar-toggler {
display: block;
}
.navbar-collapse {
border-top: 1px solid transparent;
box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}
.navbar-fixed-top {
top: 0;
border-width: 0 0 1px;
}
.navbar-nav {
float: none !important;
margin-top: 7.5px;
}
.navbar-nav > li {
float: none;
}
.navbar-nav > li > a {
padding-top: 10px;
padding-bottom: 10px;
}
.collapse.in {
display: block !important;
}
}
<link href="https://cdn.jsdelivr.net/npm/bootstrap#4.5.3/dist/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#4.5.3/dist/js/bootstrap.bundle.min.js"></script>
<nav class="navbar navbar-inverse navbar-dark bg-dark static-top">
<div class="container">
<a class="navbar-brand" href="#">
<img src="http://placehold.it/150x50?text=Logo" alt="">
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarResponsive">
<ul class="navbar-nav ml-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home
<span class="sr-only">(current)</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Services</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contact</a>
</li>
</ul>
</div>
</div>
</nav>