What package is used for the navigation bar in bootstrap?

In bootstrap, the navigation bar is wrapped with the "nav" element. The nav element is used to define the navigation link part. Using this element to wrap the navigation bar can make the navigation bar responsive. The syntax is "< nav>Navigation Bar".

The operating environment of this tutorial: Windows 10 system, bootstrap version 3.3.7, DELL G3 computer

What package is used for the navigation bar in bootstrap

The navigation bar (navbar) in Bootstrap is placed at the head of the application or website. As a responsive basic component of navigation, it can automatically adjust the display state of the navigation bar according to the width of the browser window and fold it on mobile devices. (and can be turned on or off), and gradually changes to horizontal expansion mode when the width of the viewport (viewport) increases.

Default style navigation bar

Bootstrap’s navigation bar contains two parts: one part is used to place icon buttons, defined by the container of .navbar-header; the other part is used to place navigation components, Defined by the container of .nav-collapse.collapse.

.navbar-header The container usually contains the site name and icon button. The site name is always visible, but the icon button is only visible on small screens. The site name is a .navbar-brand link. The icon button is a .navbar-toggle class button, which contains three class="icon-bar" elements. When you define a button, you also provide it with the data-toggle and data-target attributes. The data-toggle attribute tells JavaScript what the button does, and the data-target attribute indicates the menu element to display when the button is clicked.

.nav-collapse.collapse The container usually only contains navigation components, such as navigation links, forms, buttons, drop-down menus, text, non-navigation links, etc. Navigation components only expand horizontally on large screens and will not expand on small screens. It will be displayed after clicking the icon button on the screen. For a simple navigation bar, this usually only contains navigation links. Navigation links are defined using list elements of .nav.navbar.

In order to make the navigation bar responsive, it is usually wrapped with a .navbar

element.

tag defines the portion of the navigation link.

Of course, you can also use the

element, but be sure to set the role="navigation" attribute to ensure that users using assistive devices clearly know that this is a navigation area. Alternatively, to get proper alignment and padding, place the entire navigation bar in a .container or .container-fluid container.

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