Change navigation bar background when scrolling bootstrap

Question

1.00/5 (1 vote)

See more:

, +

I am trying to have my navigation bar change from transparent background to a black background when scrolling.

This is my html:

HTML

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <title>Cuppela</title>
    <script src="js/jquery.min.js" type="text/javascript"></script>
    <script src="js/bootstrap.min.js" type="text/javascript"></script>
    <script src="js/popper.min.js" type="text/javascript"></script>
    <link rel="stylesheet" href="css/bootstrap.min.css" type="text/css">
    <link rel="stylesheet" href="css/test.css" type="text/css">
</head>
<body>
<div id="nav-menu">
    <nav id="main-nav" class="navbar navbar-expand-md fixed-top navbar-dark bg-transparent">
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavbar">
            
          </button>
          <div class="collapse navbar-collapse" id="collapsibleNavbar">
            <ul class="nav navbar-nav mx-auto">
                <li class="nav-item">
                    <a class="nav-link" href="#">Home</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Shop</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">About</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Contact</a>
                </li>
            </ul>
        </div>
    </nav>
</div>

<script>
    $(document).ready(function(){
        $(window).on("scroll",function(){
    
            if($(document).scrollTop() > 50)
            {
                $("#main-nav").css('background', 'black !important;');
            }
            else
            {
                $("#main-nav").css('background','transparent !important;');
            }
        })
    });
</script>

<div class="container-fluid" id="top-main"> 

    <div id="top_text">
        <h1>Cuppela Made With Sugar</h1>
        <p style="font-size: x-large;">Delicious Homemade Cakes</p>
    </div>
    
</div>

<div id="best-sellers "class="container">
    <h2>Best Sellers</h2>
    <hr>
    <div id="best-seller-cakes" class="row">
        <div class="col-xs-12 col-sm-6 col-lg-3">
            <img src="images/chocolate_cake.jpg">
            <h4>Good<br>Cakes</h4>
            <p>Delicious Cake with Awesome Goodness</p>
        </div>
        <div class="col-xs-12 col-sm-6 col-lg-3">
            <img src="images/red_velvet_cake.jpeg">
            <h4>Awesome<br>Cakes</h4>
            <p>Delicious Cake with Awesome Goodness</p>
        </div>
        <div class="col-xs-12 col-sm-6 col-lg-3">
            <img src="images/strawberry_cake.jpg">
            <h4>Great<br>Cakes</h4>
            <p>Delicious Cake with Awesome Goodness</p>
        </div>
        <div class="col-xs-12 col-sm-6 col-lg-3">
            <img src="images/cake_seven.jpg">
            <h4>Delicious<br>Cakes</h4>
            <p>Delicious Cake with Awesome Goodness</p>
        </div>
    </div>
</div>

<footer>
    <div class="container-fluid" id="footer-content">
    <h3>Test</h3>
    </div>
</footer>

</body>
</html>

This is my css:

CSS

body{
    margin: 0px;
}

li a:hover {
    background: #ff9900;
    border-radius: 10px;
}

li a{
    color: white !important;
}

.nav-link{
    padding: 0 0 .2rem
}

#top-main{
    background-image: url(../images/cake_six_two.jpg);
    height: 100vh;
}

#nav-menu{
    font-size: medium;
    position: relative;
}

#top_text{
    color: white;
    text-align: center;
    position: relative;
    top: 50%;
    left: 50%;
    /* bring your own prefixes */
    transform: translate(-50%, -50%);
}

h1{
    font-size: 500%;
    text-align: center;
}


h2{
    text-align: center;
}

#best-sellers{
    text-align: center;
}

#best-seller-cakes{
    text-align: center;
}

h4
{
    font-size: x-large;
    font-weight: bold;
    font-family: Georgia, 'Times New Roman', Times, serif;
}

#footer-content
{
    text-align: center;
}

What I have tried:

I have tried solutions from javascript - How to Change Navigation Bar Background with Scroll? - Stack Overflow[^] and javascript - Changing nav-bar color after scrolling? - Stack Overflow[^] but it does not work for me.

Posted 4-Aug-21 23:04pm

nkm00e

Updated 5-Aug-21 0:09am

Richard Deeming

v2

Add a Solution

Comments

Richard Deeming 5-Aug-21 5:48am

I have removed the link to your website, since it made your question look a bit like spam. You've pasted the relevant code into your question, so there's no need for the link.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Answer 1 · 2021-08-05T00:09:00

I'd be inclined to toggle a class on the body element, and use CSS to control the colours. For example:

JavaScript

$(function() {
    $(window).on("scroll", function() {
        $("body").toggleClass("scrolled", $(document).scrollTop() > 50);
    })
});

CSS

#main-nav{
    background: transparent;
    transition: background 0.3s;
}
.scrolled #main-nav {
    background: black;
}

Demo[^]

Edit: If you can drop support for Internet Explorer, you can use the Intersection Observer API to make this slightly more efficient: