header bootstrap 4 with code examples

Introduction

Bootstrap is a popular front-end framework for creating websites and applications. It provides a set of pre-designed UI components and styles to help developers create a responsive and visually appealing website quickly. Bootstrap 4 is the latest version of Bootstrap, and it offers several new features and improvements over the previous versions. In this article, we will look at how to create a header using Bootstrap 4, with code examples.

Bootstrap 4 Header

A header is an essential part of any website, as it provides navigation and branding for the site. Bootstrap 4 provides several classes that you can use to create headers. Here are the steps to create a header using Bootstrap 4:

Create an HTML container for the header

To start, you need to create an HTML container that will hold your header. You can use a nav element with a class of navbar:

<nav class="navbar navbar-expand-lg navbar-light bg-light">
</nav>

Add a brand logo

The next step is to add a brand logo to your header. You can use an a element with a class of navbar-brand. The a element should contain an image of your brand logo:

<a class="navbar-brand" href="#">
  <img src="logo.png" width="30" height="30" alt="">
</a>

Add navigation links

The header should also contain navigation links that users can click to navigate to different parts of your website. To create navigation links, you can use an unordered list with a class of navbar-nav. Each list item should contain an a element with the link text:

<ul class="navbar-nav">
  <li class="nav-item">
    <a class="nav-link" href="#">Home</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>

Add a toggle button

Finally, you should add a toggle button that users can click to expand the navigation links on smaller screens. To add the toggle button, you can use a button with a class of navbar-toggler:

<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
  <span class="navbar-toggler-icon"></span>
</button>

The complete header code should look like this:

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">
    <img src="logo.png" width="30" height="30" alt="">
  </a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="
Navbar Components

Bootstrap 4 provides several components that you can use to create a header, including:

1. Brand Logo: As discussed above, you can use an `a` element with a class of `navbar-brand` to add a brand logo to your header.

2. Navigation links: You can use an unordered list with a class of `navbar-nav` to create navigation links.

3. Toggle button: You can use a button with a class of `navbar-toggler` to add a toggle button for expanding the navigation links on smaller screens.

4. Form: You can add a form to your header to allow users to search for content on your site. You can use a `form` element with a class of `form-inline`:

“`

Dropdown: You can also add a dropdown to your header to provide additional navigation options. You can use a div element with a class of dropdown:

<div class="dropdown">
  <a class="btn btn-secondary dropdown-toggle" href="#" role="button" id="dropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Dropdown link
  </a>

  <div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
    <a class="dropdown-item" href="#">Action</a>
    <a class="dropdown-item" href="#">Another action</a>
    <a class="dropdown-item" href="#">Something else here</a>
  </div>
</div>

Customizing the Navbar

Bootstrap 4 provides several classes that you can use to customize the appearance of your header. Here are some of the most commonly used classes:

bg-light: Adds a light background color to the header.
navbar-light: Adds light text color to the header.
navbar-dark: Adds dark text color to the header.
navbar-expand-*: Allows you to specify the screen width at which the navigation links should be collapsed into a toggle button. The * can be sm, md, lg, or xl.
sticky-top: Makes the header stick to the top of the screen when the user scrolls down the page.

Example

Here is an example of a header created using Bootstrap 4:

<nav class="navbar navbar-expand-lg navbar-light bg-light sticky-top">
  <a class="navbar-brand" href="#">
    <img src="logo.png" width="30" height="30" alt="">
  </a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#nav
## Popular questions 
1. What is a header in Bootstrap 4?

A header, also known as a navbar, is a navigation bar that appears at the top of a website. It typically contains the brand logo, navigation links, and a search form.

2. How do you add a brand logo to a header in Bootstrap 4?

To add a brand logo to a header in Bootstrap 4, you can use an `a` element with a class of `navbar-brand`. For example:

“`

How do you create navigation links in a header in Bootstrap 4?

To create navigation links in a header in Bootstrap 4, you can use an unordered list with a class of navbar-nav. For example:

<ul class="navbar-nav">
  <li class="nav-item">
    <a class="nav-link" href="#">Home</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>

How do you add a toggle button to a header in Bootstrap 4?

To add a toggle button to a header in Bootstrap 4, you can use a button with a class of navbar-toggler. For example:

<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
  <span class="navbar-toggler-icon"></span>
</button>

How do you customize the appearance of a header in Bootstrap 4?

To customize the appearance of a header in Bootstrap 4, you can use classes such as bg-light, navbar-light, navbar-dark, navbar-expand-*, and sticky-top. For example, to add a light background color to a header and make it stick to the top of the screen when the user scrolls down the page, you can use the following classes:

<nav class="navbar navbar-expand-lg navbar-light bg-light sticky-top">
  ...
</nav>

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