Bs Dropdowns

Bootstrap Dropdowns


Basic Dropdown

Influenza A virus subtype H5N1 dropdown carte is a toggleable carte that allows the user to select ane value from a predefined list:

Example

<div class="dropdown">
  <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Example
  <span class="caret"></span></button>
  <ul class="dropdown-menu">
    <li><a href="#">HTML</a></li>
    <li><a href="#">CSS</a></li>
    <li><a href="#">JavaScript</a></li>
  </ul>
</div>

Example Explained

The .dropdown shape indicates a dropdown menu.
To opened upwards the dropdown menu, exercise a push or a link alongside a shape of .dropdown-toggle as well as the data-toggle="dropdown" attribute.
The .caret shape creates a caret arrow prototype (), which indicates that the push is a dropdown.
Add the .dropdown-menu shape to a <ul> chemical subdivision to genuinely construct the dropdown menu.

Dropdown Divider

The .divider shape is used to separate links within the dropdown carte alongside a sparse horizontal border:

Example

<li class="divider"></li>

Dropdown Header

The .dropdown-header shape is used to add together headers within the dropdown menu:

Example

<li class="dropdown-header">Dropdown header 1</li>

Disable as well as Active items

Highlight a specific dropdown especial alongside the .active shape (adds a bluish background color).
To disable an especial inwards the dropdown menu, exercise the .disabled shape (gets a light-grey text color as well as a "no-parking-sign" prototype on hover):

Example

<li class="disabled"><a href="#">CSS</a></li>
<li class="active"><a href="#">HTML</a></li>

Dropdown Position

To right-align the dropdown, add together the .dropdown-menu-right shape to the chemical subdivision alongside .dropdown-menu:

Example

<ul class="dropdown-menu dropdown-menu-right">

Dropup

If y'all desire the dropdown carte to expand upwards instead of downwards, alter the <div> chemical subdivision alongside class="dropdown" to "dropup":

Example

<div class="dropup">

Dropdown Accessibility

To assistance better accessibility for people using covert readers, y'all should include the next role as well as aria-* attributes, when creating a dropdown menu:

Example

<div class="dropdown">
  <button class="btn btn-default dropdown-toggle" type="button" id="menu1" data-toggle="dropdown">Tutorials
  <span class="caret"></span></button>
  <ul class="dropdown-menu" role="menu" aria-labelledby="menu1">
    <li role="presentation"><a role="menuitem" href="#">HTML</a></li>
    <li role="presentation"><a role="menuitem" href="#">CSS</a></li>
    <li role="presentation"><a role="menuitem" href="#">JavaScript</a></li>
    <li role="presentation" class="divider"></li>
    <li role="presentation"><a role="menuitem" href="#">About Us</a></li>
  </ul>
</div>


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