Bootstrap Nav Tab/Pill Tutorial

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1- Bootstrap Nav

In the  Bootstrap, the  .nav class is used together with the  .nav-item and .nav-link classes to create a simple horizontal Menu.
Bootstrap Nav
<!-- UL/LI -->
<ul class="nav">
   <li class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">Css</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">Bootstrap</a>
   </li>
</ul>

<!-- DIV -->
<div class="nav">
   <div class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </div>
   <div class="nav-item">
      <a class="nav-link" href="#">Css</a>
   </div>
   <div class="nav-item">
      <a class="nav-link" href="#">Bootstrap</a>
   </div>
</div>
See the full example:
nav-example.html
<!DOCTYPE html>
<html>
   <head>
      <meta charset="utf-8">
      <title>Bootstrap Nav</title>
      <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css">
   </head>
   <body>
      <div class="container">
         <h4>Bootstrap Nav</h4>

         <ul class="nav">
            <li class="nav-item">
               <a class="nav-link" href="#">Javascript</a>
            </li>
            <li class="nav-item">
               <a class="nav-link" href="#">Css</a>
            </li>
            <li class="nav-item">
               <a class="nav-link" href="#">Bootstrap</a>
            </li>
         </ul>

      </div>

      <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
      <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
   </body>
</html>

2- Alignment

The Bootstrap provides you a few classes to align for the  Nav:
Lớp Description
.justify-content-start Left justify
.justify-content-center Center justify
.justify-content-end Right justify
.justify-content-end
<ul class="nav justify-content-end">
   <li class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">Css</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">Bootstrap</a>
   </li>
</ul>

3- Responsive Nav

By default, the  Bootstrap Nav is a horizontal Menu. But, you can make it display vertically by using the .flex-column class (This is a utility class used in many different situations).
Vertical Nav (.flex-column)
<ul class="nav flex-column">
   <li class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">Css</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">Bootstrap</a>
   </li>
</ul>
If you want to have a horizontal menu, which can turn vertical when the screen width is smaller, you can combine the .flex-column class with one of the following classes:
  • .flex-sm-row
  • .flex-md-row
  • .flex-lg-row
  • .flex-xl-row
Lớp Description
.flex-column
.flex-sm-row
If the screen width is >= 567px, Nav will be horizontal. Conversely, the Nav will display vertical.
.flex-column
.flex-md-row
If the screen width is >= 768px, Nav will be horizontal. Conversely, the Nav will display vertical.
.flex-column
.flex-lg-row
If the screen width is >= 992px, Nav will be horizontal. Conversely, the Nav will display vertical.
.flex-column
.flex-xl-row
If the screen width is​​​​​​​ >= 1200px, Nav will be horizontal. Conversely, the Nav will display vertical.
Responsive Nav
<ul class="nav flex-column flex-sm-row">
   <li class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">Css</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">Bootstrap</a>
   </li>
</ul>

4- .active & .disable

The .active class is used when you want to highlight a Link-item, as it is activated (or selected). Apply the .disabled class to the Nav-link class if you want to disable it; users will not be able to interact with this Nav-link.
.active .disabled
<ul class="nav">
   <li class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </li>
   <li class="nav-item">
      <a class="nav-link active" href="#">Bootstrap (Reading)</a>
   </li>
   <li class="nav-item">
      <a class="nav-link disabled" href="#">AngularJS (Comming Soon)</a>
   </li>
</ul>

5- Nav (Tab)

If you want Nav to display as a TAB, please use the  .nav-tabs ​​​​​​​class.
Tab (.nav-tabs)
<ul class="nav nav-tabs">
   <li class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </li>
   <li class="nav-item">
      <a class="nav-link active" href="#">Bootstrap (Reading)</a>
   </li>
   <li class="nav-item">
      <a class="nav-link disabled" href="#">AngularJS (Comming Soon)</a>
   </li>
</ul>
Use the .nav-tabs class in combination with the .nav-fill you will get a Nav (Tab) where Nav-Items will adjust their width to fill the remaining space horizontally.
Tab (.nav-tabs .nav-fill)
<ul class="nav nav-tabs nav-fill">
   <li class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">CSS</a>
   </li>
   <li class="nav-item">
      <a class="nav-link active" href="#">Bootstrap</a>
   </li>
</ul>

6- Nav (Tab) Data-Toggle

A simple Nav (Tab) is actually a static menu. The Nav-Items can not change its state. Users click on the Nav-item to jump to another page. A more complex Nav(Tab) allows displaying the corresponding content that users click on without jumping to another page.
Nav (Tabs) Data-Toggle
<ul class="nav nav-tabs" id="myTab" role="tablist">
   <li class="nav-item">
      <a class="nav-link" id="tab-javascript" data-toggle="tab"
         href="#content-javascript"
         role="tab" aria-controls="content-javascript" aria-selected="false">
      Javascript
      </a>
   </li>
   <li class="nav-item">
      <a class="nav-link" id="tab-css" data-toggle="tab"
         href="#content-css"
         role="tab" aria-controls="content-css" aria-selected="false">
      CSS
      </a>
   </li>
   <li class="nav-item">
      <a class="nav-link active" id="tab-bootstrap" data-toggle="tab"
         href="#content-bootstrap"
         role="tab" aria-controls="content-bootstrap" aria-selected="true">
      Bootstrap
      </a>
   </li>
</ul>

<div class="tab-content" id="myTabContent">
   <div class="tab-pane fade" id="content-javascript"
      role="tabpanel" aria-labelledby="tab-javascript">
      JavaScript is a cross-platform, object-oriented scripting language ...
   </div>
   <div class="tab-pane fade" id="content-css"
      role="tabpanel" aria-labelledby="tab-css">
      CSS stands for Cascading Style Sheets. ...
   </div>
   <div class="tab-pane fade show active" id="content-bootstrap"
      role="tabpanel" aria-labelledby="tab-bootstrap">
      Bootstrap is a free front-end framework for faster and easier web development...
   </div>
</div>
Note: You can remove the  role, aria-controls, aria-selected, aria-labelledby attributes out of the above example without causing any problems. These attributes aim at suggesting devices like Screen Reader (Screen reader for the blind).

7- Nav (Pill)

Pill is the same as  Tab in activities except for difference in the. Nav-item interface of Nav(Pill) in the  active status, which looks like a button. Below is the illustration of the  Pill:
Pill (.nav-pills)
<ul class="nav nav-pills">
   <li class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </li>
   <li class="nav-item">
      <a class="nav-link active" href="#">Bootstrap</a>
   </li>
   <li class="nav-item">
      <a class="nav-link disabled" href="#">AngularJS (Comming Soon)</a>
   </li>
</ul>
Use the .nav-fill class in combination with the .nav-fill , you will get a Nav (Pill) where the Nav-Items will adjust their width to fill the remaining space horizontally.
Pill (.nav-pills .nav-fill)
<ul class="nav nav-pills nav-fill">
   <li class="nav-item">
      <a class="nav-link" href="#">Javascript</a>
   </li>
   <li class="nav-item">
      <a class="nav-link" href="#">CSS</a>
   </li>
   <li class="nav-item">
      <a class="nav-link active" href="#">Bootstrap</a>
   </li>
</ul>

8- Nav (Pill) Data-Toggle

Nav (Pill) Data-Toggle
<ul class="nav nav-pills" id="myPill" role="tablist">
   <li class="nav-item">
      <a class="nav-link" id="tab-javascript" data-toggle="tab"
         href="#content-javascript"
         role="tab" aria-controls="content-javascript" aria-selected="false">
      Javascript
      </a>
   </li>
   <li class="nav-item">
      <a class="nav-link" id="tab-css" data-toggle="tab"
         href="#content-css"
         role="tab" aria-controls="content-css" aria-selected="false">
      CSS
      </a>
   </li>
   <li class="nav-item">
      <a class="nav-link active" id="tab-bootstrap" data-toggle="tab"
         href="#content-bootstrap"
         role="tab" aria-controls="content-bootstrap" aria-selected="true">
      Bootstrap
      </a>
   </li>
</ul>

<div class="tab-content" id="myPillContent">
   <div class="tab-pane fade" id="content-javascript"
      role="tabpanel" aria-labelledby="tab-javascript">
      JavaScript is a cross-platform, object-oriented scripting language ...
   </div>
   <div class="tab-pane fade" id="content-css"
      role="tabpanel" aria-labelledby="tab-css">
      CSS stands for Cascading Style Sheets. ...
   </div>
   <div class="tab-pane fade show active" id="content-bootstrap"
      role="tabpanel" aria-labelledby="tab-bootstrap">
      Bootstrap is a free front-end framework for faster and easier web development...
   </div>
</div>

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