Bootstrap UI Components
Buttons
Bootstrap includes several predefined button styles, each serving its own semantic purpose, with a few extras thrown in for more control.
Button Styles
<button type="button" class="btn btn-primary">Primary</button>
<button type="button" class="btn btn-secondary">Secondary</button>
<button type="button" class="btn btn-success">Success</button>
<button type="button" class="btn btn-danger">Danger</button>
<button type="button" class="btn btn-warning">Warning</button>
<button type="button" class="btn btn-info">Info</button>
<button type="button" class="btn btn-light">Light</button>
<button type="button" class="btn btn-dark">Dark</button>
<button type="button" class="btn btn-link">Link</button>
Outline Buttons
<button type="button" class="btn btn-outline-primary">Primary</button>
<button type="button" class="btn btn-outline-secondary">Secondary</button>
<button type="button" class="btn btn-outline-success">Success</button>
<button type="button" class="btn btn-outline-danger">Danger</button>
<button type="button" class="btn btn-outline-warning">Warning</button>
<button type="button" class="btn btn-outline-info">Info</button>
<button type="button" class="btn btn-outline-light">Light</button>
<button type="button" class="btn btn-outline-dark">Dark</button>
Button Sizes
<button type="button" class="btn btn-primary btn-lg">Large button</button>
<button type="button" class="btn btn-primary">Standard button</button>
<button type="button" class="btn btn-primary btn-sm">Small button</button>
Button States
<!-- Active state -->
<button type="button" class="btn btn-primary active">Active Primary</button>
<!-- Disabled state -->
<button type="button" class="btn btn-primary" disabled>Disabled Primary</button>
<a href="#" class="btn btn-primary disabled" tabindex="-1" role="button" aria-disabled="true">Disabled link</a>
Button Groups
Group a series of buttons together on a single line with .btn-group.
<div class="btn-group" role="group" aria-label="Basic example">
<button type="button" class="btn btn-primary">Left</button>
<button type="button" class="btn btn-primary">Middle</button>
<button type="button" class="btn btn-primary">Right</button>
</div>
Toolbar
Combine sets of button groups into button toolbars for more complex components.
<div class="btn-toolbar" role="toolbar" aria-label="Toolbar with button groups">
<div class="btn-group me-2" role="group" aria-label="First group">
<button type="button" class="btn btn-primary">1</button>
<button type="button" class="btn btn-primary">2</button>
<button type="button" class="btn btn-primary">3</button>
</div>
<div class="btn-group me-2" role="group" aria-label="Second group">
<button type="button" class="btn btn-secondary">4</button>
<button type="button" class="btn btn-secondary">5</button>
</div>
<div class="btn-group" role="group" aria-label="Third group">
<button type="button" class="btn btn-info">6</button>
</div>
</div>
Forms and Input Groups
Basic Form Controls
<form>
<div class="mb-3">
<label for="exampleInputEmail1" class="form-label">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
<div id="emailHelp" class="form-text">We'll never share your email with anyone else.</div>
</div>
<div class="mb-3">
<label for="exampleInputPassword1" class="form-label">Password</label>
<input type="password" class="form-control" id="exampleInputPassword1">
</div>
<div class="mb-3 form-check">
<input type="checkbox" class="form-check-input" id="exampleCheck1">
<label class="form-check-label" for="exampleCheck1">Check me out</label>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
Form Control Sizes
<input class="form-control form-control-lg" type="text" placeholder="Large input">
<input class="form-control" type="text" placeholder="Default input">
<input class="form-control form-control-sm" type="text" placeholder="Small input">
Form Select
<select class="form-select" aria-label="Default select example">
<option selected>Open this select menu</option>
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>
</select>
Checks and Radios
<!-- Checkbox -->
<div class="form-check">
<input class="form-check-input" type="checkbox" value="" id="flexCheckDefault">
<label class="form-check-label" for="flexCheckDefault">
Default checkbox
</label>
</div>
<!-- Radio buttons -->
<div class="form-check">
<input class="form-check-input" type="radio" name="flexRadioDefault" id="flexRadioDefault1">
<label class="form-check-label" for="flexRadioDefault1">
Default radio
</label>
</div>
<div class="form-check">
<input class="form-check-input" type="radio" name="flexRadioDefault" id="flexRadioDefault2" checked>
<label class="form-check-label" for="flexRadioDefault2">
Default checked radio
</label>
</div>
<!-- Switches -->
<div class="form-check form-switch">
<input class="form-check-input" type="checkbox" role="switch" id="flexSwitchCheckDefault">
<label class="form-check-label" for="flexSwitchCheckDefault">Default switch checkbox input</label>
</div>
Input Groups
<!-- Basic example -->
<div class="input-group mb-3">
<span class="input-group-text" id="basic-addon1">@</span>
<input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="basic-addon1">
</div>
<!-- With button -->
<div class="input-group mb-3">
<input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username" aria-describedby="button-addon2">
<button class="btn btn-outline-secondary" type="button" id="button-addon2">Button</button>
</div>
<!-- With dropdown -->
<div class="input-group mb-3">
<button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Action</a></li>
<li><a class="dropdown-item" href="#">Another action</a></li>
<li><a class="dropdown-item" href="#">Something else here</a></li>
<li><hr class="dropdown-divider"></li>
<li><a class="dropdown-item" href="#">Separated link</a></li>
</ul>
<input type="text" class="form-control" aria-label="Text input with dropdown button">
</div>
Navs and Navbar
Basic Nav
<ul class="nav">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Active</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled">Disabled</a>
</li>
</ul>
Horizontal Alignment
<!-- Centered -->
<ul class="nav justify-content-center">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Active</a>
</li>
<!-- Other items -->
</ul>
<!-- Right-aligned -->
<ul class="nav justify-content-end">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Active</a>
</li>
<!-- Other items -->
</ul>
Tabs and Pills
<!-- Tabs -->
<ul class="nav nav-tabs">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Active</a>
</li>
<!-- Other items -->
</ul>
<!-- Pills -->
<ul class="nav nav-pills">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Active</a>
</li>
<!-- Other items -->
</ul>
Basic Navbar
<nav class="navbar navbar-expand-lg bg-body-tertiary">
<div class="container-fluid">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Features</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Pricing</a>
</li>
<li class="nav-item">
<a class="nav-link disabled">Disabled</a>
</li>
</ul>
</div>
</div>
</nav>
Navbar Colors
<!-- Dark navbar with light text -->
<nav class="navbar navbar-dark bg-dark">
<!-- Navbar content -->
</nav>
<!-- Primary color navbar -->
<nav class="navbar navbar-dark bg-primary">
<!-- Navbar content -->
</nav>
<!-- Light navbar with dark text -->
<nav class="navbar navbar-light" style="background-color: #e3f2fd;">
<!-- Navbar content -->
</nav>
Interactive Component Playground
This interactive playground allows you to experiment with different Bootstrap components and their configurations in real-time. Select a component type and customize its properties to see how it affects the appearance and behavior.
Component Controls
Component Preview
Generated HTML
<button type="button" class="btn btn-primary">Click Me</button>Component Variations
Cards
Bootstrap's cards provide a flexible and extensible content container with multiple variants and options.
Basic Card
<div class="card" style="width: 18rem;">
<img src="..." class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title">Card title</h5>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
Card with Header and Footer
<div class="card">
<div class="card-header">
Featured
</div>
<div class="card-body">
<h5 class="card-title">Special title treatment</h5>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
<div class="card-footer text-muted">
2 days ago
</div>
</div>
Card Layout
<!-- Card groups -->
<div class="card-group">
<div class="card">
<img src="..." class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title">Card title</h5>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
<div class="card">
<!-- Second card content -->
</div>
<div class="card">
<!-- Third card content -->
</div>
</div>
<!-- Card grid -->
<div class="row row-cols-1 row-cols-md-2 g-4">
<div class="col">
<div class="card">
<img src="..." class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title">Card title</h5>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content.</p>
</div>
</div>
</div>
<div class="col">
<div class="card">
<!-- Second card content -->
</div>
</div>
<!-- More cols -->
</div>
Modals and Dialogs
Basic Modal
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#exampleModal">
Launch demo modal
</button>
<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h1 class="modal-title fs-5" id="exampleModalLabel">Modal title</h1>
<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
</div>
<div class="modal-body">
...
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
Modal Sizes
<!-- Small modal -->
<div class="modal-dialog modal-sm">...</div>
<!-- Default modal -->
<div class="modal-dialog">...</div>
<!-- Large modal -->
<div class="modal-dialog modal-lg">...</div>
<!-- Extra large modal -->
<div class="modal-dialog modal-xl">...</div>
Vertically Centered
<div class="modal-dialog modal-dialog-centered">
<div class="modal-content">
<!-- Modal content -->
</div>
</div>
Scrollable Modal
<div class="modal-dialog modal-dialog-scrollable">
<div class="modal-content">
<!-- Modal content -->
</div>
</div>
More Components
Bootstrap includes many more components such as:
- Dropdowns
- Collapse and Accordion
- Carousel
- Tooltips and Popovers
- Spinners and Progress bars
- Pagination
- Breadcrumbs
- Badges
- Alerts
- List groups
Explore the official Bootstrap documentation for complete details on all components.