Clear navigation bar on top of a backdrop picture

I am currently exploring the most effective method to place my hero/background image behind a transparent Bootstrap 4 navbar. Some have suggested applying the background image to the body of the page, but I specifically want the background image only on the landing page of my Rails application, not the other static pages within.

I have experimented with using negative margins on the navbar and container holding the background image, but all attempts have resulted in negative side effects.

I believe there must be a simple solution to achieve this, even with the specific navbar from Bootstrap that I have chosen, but I am struggling to find success.

UPDATE:

Changing the navbar classes from:

<nav class="navbar navbar-toggleable-md navbar-light bg-faded">

to:
<nav class="navbar fixed-top navbar-expand-md navbar-light bg-faded">

has fulfilled exactly what I was aiming for.

.navbar {
  background-color: transparent !important;
}

.bgimg {
  height: 600px;
  background-image: url('https://images.unsplash.com/photo-1473923377535-0002805f57e8?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=d239ac0e409e18cf74ace503c491714f&auto=format&fit=crop&w=1469&q=80');
  background-attachment: fixed;
  background-position: center top;
}
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
  <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">
    <span class="navbar-toggler-icon"></span>
  </button>
  <a class="navbar-brand" href="#">Navbar</a>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item">
        <a class="nav-link" href="#">Home</a>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Link</a>
      </li>
    </ul>
  </div>
</nav>

<div class="container-fluid bgimg"></div>

cssbootstrap-4

Answer №1

To achieve the effect of fixed background in the navbar, you can simply add the same background with a white overlay for opacity control:

.navbar {
  background-image:
  linear-gradient(rgba(255,255,255,0.3),rgba(255,255,255,0.3)), 
  url('https://images.unsplash.com/photo-1473923377535-0002805f57e8?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=d239ac0e409e18cf74ace503c491714f&auto=format&fit=crop&w=1469&q=80');
  background-attachment: fixed;
  background-position: auto,center top;
}

.bgimg {
  height: 600px;
  background-image: url('https://images.unsplash.com/photo-1473923377535-0002805f57e8?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=d239ac0e409e18cf74ace503c491714f&auto=format&fit=crop&w=1469&q=80');
  background-attachment: fixed;
  background-position: center top;
}
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>

<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
  <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">
    <span class="navbar-toggler-icon"></span>
  </button>
  <a class="navbar-brand" href="#">Navbar</a>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item">
        <a class="nav-link" href="#">Home</a>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Link</a>
      </li>
    </ul>
  </div>
</nav>

<div class="container-fluid bgimg"></div>

Answer №2

Have you thought about changing the .bgimg to have a position: absolute;?

Here's an example:

.bgimg {
  height: 800px;
  position: absolute;
  top: 0;
  left: 0;
  background-image: url('https://images.unsplash.com/photo-1495531244608-ec53cfef2307?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=666200cf6181ba84eee9f130e5c3b030&auto=format&fit=crop&w=1091&q=80');
  background-attachment: fixed;
  background-position: center;
}

Just make sure to give your navbar a higher z-index.

Check out this fiddle.

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