Changing the color of the navbar for different viewport sizes in Bootstrap v4

I recently made the switch to Bootstrap V4 and I am currently customizing the starter template provided at:

My goal is to make the navbar transparent, but have it change to a dark color when the viewport size is sm or xs.

Despite my efforts to achieve this by using a breakpoint and adding a 'navbar-custom' class, the appearance remains unchanged.

html {
    overflow: hidden;
    height: 100%;
    
 }

// Additional CSS code snippets are included but are too lengthy to be rewritten verbatim for this output


<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1 shrink-to-fit=no">
<title>Randomood says: Welcome!</title>

<!-- Bootstrap 4.0 cdn -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">


<!--custom styles for this page -->
<link href="css/home.css" rel="stylesheet">


</head>
<body>


// Other HTML markup and scripts follow from here...

htmlcsstwitter-bootstrap-4

Answer №1

Simple way to customize your bootstrap theme using scss:

.bg-dark {
    background-color: #343a40;
    @include media-breakpoint-up(sm) {
        background-color: transparent;
    }
}

Answer №2

Utilizing Bootstrap's .bg-dark class within your <nav> can pose a challenge when attempting to adjust the background color. The CSS declaration for this class is as follows:

.bg-dark {
    background-color: #343a40!important;
}

While you may not be able to directly override the background-color property, one solution is to remove the .bg-dark class through Javascript or jQuery and introduce your own custom class that modifies the background-color of the <nav> at specific screen breakpoints. Hopefully, this explanation provides clarity on how to approach this issue.

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