Achieving flexbox's equal height for Bootstrap's Navbar and content

I am faced with the challenge of designing a layout where a content grid occupies the entire remaining page, while also incorporating a navigation bar.

To achieve this, my approach involves placing the navigation bar within a flex container and the content in a row with 100% height. The ultimate goal is to have the content fill up the remaining space on the page, regardless of the dynamic height of the navigation bar.

However, I have encountered an issue with the navigation bar not resizing correctly on smaller screens. When the menu is expanded, it ends up overlapping with the content.

<div class="container-fluid h-100 d-flex flex-column">

  <nav class="navbar navbar-expand-sm s-navbar">
     ...
  </nav>
  <div class="row h-100">
     ...// content presented here
  </div>
</div>

You can view the issue here https://jsfiddle.net/ej9fd368/8/, where the last menu item is cut off due to the yellow content.

The key requirement is for the content to seamlessly fill up the remainder of the page.

csstwitter-bootstrapflexboxbootstrap-4

Answer №1

New Features in Bootstrap 5 (2023 Update)

Just a heads up for those reading this in the future, Bootstrap 5 continues to utilize flexbox and the same classes for creating full-height layouts.

Check out this link for more information

Original Bootstrap 4 Answer

Instead of using h-100 for the yellow content area, consider adding an additional CSS class to ensure it grows flexibly in height...

.flex-fill {
  flex:1 1 auto;
}

Visit this link for a detailed explanation

<div class="container-fluid h-100 d-flex flex-column">
    <nav class="navbar navbar-expand-sm s-navbar">
        <a class="brand navbar-brand" href="/">Brand</a>
        <button class="navbar-toggler s-btn-hamburger order-first s-color-icons" aria-expanded="true" aria-controls="navbar-test" aria-label="Toggle navigation" type="button" data-target="#navbar-test" data-toggle="collapse">
            <span class="navbar-toggler-icon k-icon k-icon-md k-i-hamburger"></span>
        </button>
        <div class="navbar-collapse s-menu-content collapse show" id="navbar-test">
            <ul class="navbar-nav mr-auto">
                <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" id="dropdown1" aria-expanded="false" aria-haspopup="true" data-toggle="dropdown">Menu Item</a>
                    <div class="dropdown-menu" aria-labelledby="dropdown1">
                        <a class="dropdown-item" href="/Device">Sub menu</a>
                    </div>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="/Test">Test</a>
                </li>
            </ul>
        </div>
    </nav>
    <div class="row flex-fill">
        <main class="col" style="background-color: yellow"></main>
    </div>
</div>

Note: The flex-fill utility class will become part of the upcoming Bootstrap 4.1 release: Learn more about this update here

(Explore the Updated Demo for Bootstrap 4.1)

Related question: Discover how to stretch the row to fill remaining height

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