Enhancing the appearance of the bootstrap fixed navbar with additional elements above and below

I am attempting to include a banner above my fixed-top navbar. Although I have some basic understanding of how to achieve this, my specific example seems to be more complex and I am struggling to find the right solution.

Users should be able to add a custom banner to the top of my page. If this occurs, I need to adjust everything (including the fixed navbar) down by the height of the banner (let's say 20 px).

I have defined a class that can be applied to the nav element:

.top-banner-nav {
  top: 20px;
}

Navbar:

  <nav class="navbar navbar-default navbar-fixed-top" ng-class="{'top-banner-nav': banner == true}">

This works well for moving the static navbar down by 20px when a banner is present. However, I am facing two issues.

  1. With a static navbar like this, I have to add top padding to the body to shift the body content below the banner. Now, I would need to move the body content down by 70px. I'm unsure if there's a dynamic solution for this.

  2. There's another static navbar directly below the top navbar. When I move the top navbar down by 20px, I also need to move this lower navbar down by 20px. Unfortunately, this lower navbar is fixed with top: 50px to position it right below the upper navbar.

I have a plunker showcasing the issue. At this point, I'm unsure how to proceed further. It may involve tinkering with JavaScript, but I'd prefer to find a solution that avoids any jumping around during page load if possible.

http://plnkr.co/edit/DYYMz1?p=preview

Answer №1

After reviewing your plunker, I have implemented some modifications to both the CSS and HTML in order to achieve the desired result. One key change I made to the HTML file was within the body tag, which now appears as follows:

<body ng-controller="MainController" ng-class="{'bodyModified': banner == true}">

Regarding the CSS file, the updates included:

body {
  padding-top: 50px; // Necessary for proper alignment below fixed header
}

.bodyModified {
  padding-top: 20px;
}

.settings-nav {
    position: relative;
    right: 0;
    left: 0;
    background-color: #E2E2E2;
    z-index: 1029;
    top:0px;
}

.settings-content {
    padding-top: 70px;
}

.top-banner-nav {
    position: relative;
    margin: 0;
    height: 20px;
}

.top-banner {
    position: fixed;
    right: 0;
    left: 0;
    top:0;
    margin-bottom: 0px;
    background-color: #FFFF00;
}

In addition to CSS, utilizing JavaScript and jQuery can also lead to achieving the desired outcome. Should you require further assistance, feel free to reach out. I hope these adjustments prove helpful. Please share your progress with me.

To view a demonstration of the changes, please visit the updated plunker:

http://plnkr.co/edit/39LhQA2gdMremnTOGXe4?p=preview

Answer №2

If you're looking for a solution using jQuery, you can consider the following approach. For instance, if you have elements with the class name top-nav-fixed-banner, you can implement a function like this:

function adjustBannerHeight(){
    var bannerTotalHeight = $(".top-banner-div").height();
    $(".top-nav-fixed-banner").each(function(){
        var height = $(this).height();
        bannerTotalHeight += height;                
    });
    $('.top-banner-div').css({"height":bannerTotalHeight+"px"});
}

Simply call adjustBannerHeight() whenever you dynamically insert a new banner.

I hope this solution proves to be helpful.

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