Position sticky with submenu not scrolling - html

Question

I am using bootstrap v-4 beta2 and I want to create sticky top menu with submenu. Everything is working on desktop but when on mobile when I click to open submenu I cant see whole submenu and when I am scrolling with whole website but not menu. I found out I have to do something with li.dropdown - when I added position absolute it got a bit messy but I saw the menu. But I cant get what I should do. Here is the code:
li.dropdown:hover>.dropdown-menu {
display: block;
}
li.dropdown {
position: static;
}
.multi-columns {
width: 100%;
}
<div class="nav-wrapper sticky-top">
<div class="container">
<nav class="navbar navbar-expand-lg navbar-light text-uppercase">
<a class="navbar-brand" href="/"></a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="index.html">Domov <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="blog.html">Blog</a>
</li>
<li class="nav-item active">
<a class="nav-link" href="eshop.html">E-shop</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
<div class="dropdown-menu multi-columns">
<div class="row">
<div class="col-md-3">
<h3 class="h5">Blog</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
<div class="col-md-3">
<h3 class="h5">Blog 2</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
<div class="col-md-3">
<h3 class="h5">Blog 3</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
<div class="col-md-3">
<h3 class="h5">Blog 4</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</div>
</div>
</li>
</ul>
<form action="" class="form-inline">
<select class="select2 form-control" style="width: 100%;">
</select>
</form>
</div>
</nav>
<!-- /.nav -->
</div>
<!-- /.container -->
</div>
<!-- /.nav-wrapper -->
Also when on desktop when I hover on the "dropdown" it gets shown but by the time I get the mouse on the submenu it disapears. Should I move the submenu with margin-top: -10px or smh like that? Or is there any solution?
Edit
The main thing is the submenu is greater than viewport and then I simply cant scroll on that

Answer 1

If you need your sub-menu want to scroll inside the content, for that you need to specify the max-height and overflow: scroll;.
You also need to change col-md-3 to col-lg-3 inside the dropdown-menu multi-columns division.
CSS
#media (max-width: 991px){
.multi-columns{
max-height: 300px;
overflow: auto;
}
}
Demo Snippet:
li.dropdown:hover>.dropdown-menu {
display: block;
}
li.dropdown {
position: static;
}
.multi-columns {
width: 100%;
}
#media (max-width: 991px){
.multi-columns{
max-height: 300px;
overflow: auto;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-beta/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-beta/js/bootstrap.min.js"></script>
<div class="nav-wrapper sticky-top">
<div class="container">
<nav class="navbar navbar-expand-lg navbar-light text-uppercase">
<a class="navbar-brand" href="/"></a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="index.html">Domov <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="blog.html">Blog</a>
</li>
<li class="nav-item active">
<a class="nav-link" href="eshop.html">E-shop</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
<div class="dropdown-menu multi-columns">
<div class="row">
<div class="col-lg-3">
<h3 class="h5">Blog</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
<div class="col-lg-3">
<h3 class="h5">Blog 2</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
<div class="col-lg-3">
<h3 class="h5">Blog 3</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
<div class="col-lg-3">
<h3 class="h5">Blog 4</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</div>
</div>
</li>
</ul>
<form action="" class="form-inline">
<select class="select2 form-control" style="width: 100%;">
</select>
</form>
</div>
</nav>
<!-- /.nav -->
</div>
<!-- /.container -->
</div>
<!-- /.nav-wrapper -->
Hope this may help you. Codepen demo link.
Thanks.

Answer 2

Please see the following solution:
https://jsfiddle.net/ard5rg6f/1/
I have used few lines of jQuery to add class to sticky div when menu opens.
$(document).ready(function() {
$('#navbarNav').on('shown.bs.collapse', function () {
$('.nav-wrapper.sticky-top').addClass('menu-opened');
});
$('#navbarNav').on('hidden.bs.collapse', function () {
$('.nav-wrapper.sticky-top').removeClass('menu-opened');
});
});
and removed position absolute property of dropdown menu and added scroll to sticky div.
.nav-wrapper.sticky-top {
position: fixed;
}
.nav-wrapper.sticky-top.menu-opened {
overflow: scroll;
height: 100vh;
}
.dropdown-menu {
display: block;
position: inherit;
}

Answer 3

If you're wanting the nav burger button to 'stick' on the site when you scroll, you will need to position it as fixed.
Edit: I forgot the submenu but in chrome devtools enabling mobile mode, this works fine. Clicking the submenu opens up the menu and then clicking on it again, closes it.
li.dropdown:hover>.dropdown-menu {
display: block;
}
li.dropdown {
position: static;
}
.multi-columns {
width: 100%;
}
.body {
height: 1000px;
}
.nav-wrapper.sticky-top {
position: fixed;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet" />
<div class="body">
<div class="container">
<div class="nav-wrapper sticky-top">
<div class="container">
<nav class="navbar navbar-expand-lg navbar-light text-uppercase">
<a class="navbar-brand" href="/"></a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="index.html">Domov <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="blog.html">Blog</a>
</li>
<li class="nav-item active">
<a class="nav-link" href="eshop.html">E-shop</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
<div class="dropdown-menu multi-columns">
<div class="row">
<div class="col-md-3">
<h3 class="h5">Blog</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
<div class="col-md-3">
<h3 class="h5">Blog 2</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
<div class="col-md-3">
<h3 class="h5">Blog 3</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
<div class="col-md-3">
<h3 class="h5">Blog 4</h3>
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</div>
</div>
</li>
</ul>
<form action="" class="form-inline">
<select class="select2 form-control" style="width: 100%;">
</select>
</form>
</div>
</nav>
<!-- /.nav -->
</div>
<!-- /.container -->
</div>
<!-- /.nav-wrapper -->
</div>
</div>