<header class="header patternbg">
		<div class="nav-wrapper container">
			<nav class="navbar navbar-toggleable-sm navbar-light main-nav">
				<button class="navbar-toggler  navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
					<a href="" class="burger-menu icon-toggle"><i class="fa fa-bars"></i></a>
				</button>
				<a class="navbar-brand" href="#"><img src="..."></a>

				<div class="collapse navbar-collapse" id="navbarSupportedContent">
					<ul class="navbar-nav ml-auto">
						<li class="nav-item dropdown drop_single">
							<a class="nav-link dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" href="home-beauty.html">Link <span class="sr-only">(current)</span></a>
							<ul class="dropdown-menu dd_first">
								<li><a href="#">Link</a></li>
								<li><a href="#">Link</a></li>
							</ul>
						</li>
						<li class=" dropdown megaDropMenu nav-item" >
							<a class="nav-link dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false" href="javascript:void(0)">Link</a>
							<ul class="row dropdown-menu">
								<li class="col-md-4 col-xs-12">
									<ul class="list-unstyled">
										<li><a href="#">Link</a></li>
									</ul>
								</li>
								<li class="col-md-4 col-xs-12">
									<ul class="list-unstyled">
										<li><a href="#">Link</a></li>
									</ul>
								</li>
								<li class="col-md-4 col-xs-12">
									<ul class="list-unstyled">
										<li><a href="#">Link</a></li>
									</ul>
								</li>
							</ul>
						</li>
						<li class="nav-item">
							<a class="nav-link" href="#">About</a>
						</li>
					</ul>
				</div>
				<div class="nav-cart">
					<a href="" class="btn-cart icon-toggle"><i class="fa fa-shopping-basket"></i></a>
					<ul class="cart_item-box">
						<li class="media">
							<div class="media-head">
								<img class="d-flex mr-3 img-full" src="..." alt="Generic placeholder image">
							</div>
							<div class="media-body">
								...
							</div>
						</li>
						<li>
							<a href="" class="btn btn-primary">submit</a>
						</li>
					</ul>
				</div>
			</nav>
		</div>
	</header>

	<!-- Background color -->
	<header class="header bg-dark">

	</header>

						

How to use

• You have to use Bootstrap version 4
• You can use any color class or background image class with .header (like .patternbg in the example )
• use class .main-nav as following few classes stylied inheriting this class
• for the single layer dropdown use .drop_single with .dropdown
• For the first layer dropdown menu use class .dd-first with .dropdown-menu
• for the single layer dropdown use .megaDropMenu with .dropdown
• Set any background color to .header or use class for particular background color of the navbar