Bootstrap 4 Tutorial

BS4 Dropdowns

Last modified on: October 26, 2024

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<h1>Bootstrap 4 Dropdowns</h1>
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<div class="relative p-1 rounded-sm flex items-center justify-center bg-token-main-surface-primary text-token-text-primary h-8 w-8">Bootstrap 4 dropdowns are powerful components that allow you to toggle visibility of a list of items or actions. They can be used in various contexts, such as navigation bars, forms, and buttons, providing a simple way to create menus and lists that can be shown or hidden based on user interaction.</div>
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<h1><span style="font-size: 18pt;">Basic Dropdown</span></h1>
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<p>To create a simple dropdown menu, use the <code>.dropdown</code> class along with the <code>.dropdown-toggle</code> and <code>.dropdown-menu</code> classes.</p>
<h3>Example</h3>
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<pre class="language-markup"><code>&lt;div class="dropdown"&gt;
    &lt;button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;
        Dropdown button
    &lt;/button&gt;
    &lt;div class="dropdown-menu" aria-labelledby="dropdownMenuButton"&gt;
        &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
        &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
        &lt;div class="dropdown-divider"&gt;&lt;/div&gt;
        &lt;a class="dropdown-item" href="#"&gt;Something else here&lt;/a&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>
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<h2>Dropdowns in Navigation Bars</h2>
<p>Dropdowns can be incorporated into navigation bars to create a more interactive user interface.</p>
<h3>Example</h3>
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<pre class="language-markup"><code>&lt;nav class="navbar navbar-expand-lg navbar-light bg-light"&gt;
    &lt;a class="navbar-brand" href="#"&gt;Navbar&lt;/a&gt;
    &lt;button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation"&gt;
        &lt;span class="navbar-toggler-icon"&gt;&lt;/span&gt;
    &lt;/button&gt;
    &lt;div class="collapse navbar-collapse" id="navbarNav"&gt;
        &lt;ul class="navbar-nav"&gt;
            &lt;li class="nav-item active"&gt;
                &lt;a class="nav-link" href="#"&gt;Home&lt;/a&gt;
            &lt;/li&gt;
            &lt;li class="nav-item"&gt;
                &lt;a class="nav-link" href="#"&gt;Features&lt;/a&gt;
            &lt;/li&gt;
            &lt;li class="nav-item dropdown"&gt;
                &lt;a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;
                    Dropdown
                &lt;/a&gt;
                &lt;div class="dropdown-menu" aria-labelledby="navbarDropdown"&gt;
                    &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
                    &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
                    &lt;div class="dropdown-divider"&gt;&lt;/div&gt;
                    &lt;a class="dropdown-item" href="#"&gt;Something else here&lt;/a&gt;
                &lt;/div&gt;
            &lt;/li&gt;
        &lt;/ul&gt;
    &lt;/div&gt;
&lt;/nav&gt;
</code></pre>
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<h2>Dropdowns with Headers and Dividers</h2>
<p>You can also add headers and dividers in your dropdown menus to organize the items better.</p>
<h3>Example</h3>
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<pre class="language-markup"><code>&lt;div class="dropdown"&gt;
    &lt;button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;
        Dropdown with Headers
    &lt;/button&gt;
    &lt;div class="dropdown-menu" aria-labelledby="dropdownMenuButton"&gt;
        &lt;h6 class="dropdown-header"&gt;Header&lt;/h6&gt;
        &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
        &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
        &lt;div class="dropdown-divider"&gt;&lt;/div&gt;
        &lt;h6 class="dropdown-header"&gt;Another Header&lt;/h6&gt;
        &lt;a class="dropdown-item" href="#"&gt;Something else here&lt;/a&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>
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<h2>Dropup Dropdown</h2>
<p>If you want the dropdown to open upwards, you can add the <code>.dropup</code> class.</p>
<h3>Example</h3>
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<pre class="language-markup"><code>&lt;div class="dropup"&gt;
    &lt;button class="btn btn-secondary dropdown-toggle" type="button" id="dropupMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;
        Dropup button
    &lt;/button&gt;
    &lt;div class="dropdown-menu" aria-labelledby="dropupMenuButton"&gt;
        &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
        &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
        &lt;div class="dropdown-divider"&gt;&lt;/div&gt;
        &lt;a class="dropdown-item" href="#"&gt;Something else here&lt;/a&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>
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<h2>Disabled Dropdown</h2>
<p>You can also create a disabled dropdown button to indicate that it's not currently available.</p>
<h3>Example</h3>
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<pre class="language-markup"><code>&lt;div class="dropdown"&gt;
    &lt;button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" disabled&gt;
        Disabled Dropdown
    &lt;/button&gt;
    &lt;div class="dropdown-menu" aria-labelledby="dropdownMenuButton"&gt;
        &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
        &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>
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<h2>Complete Example: Bootstrap 4 Dropdowns</h2>
<p>Here's a complete example showcasing different types of dropdowns.</p>
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<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
    &lt;meta charset="UTF-8"&gt;
    &lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;
    &lt;title&gt;Bootstrap 4 Dropdowns Example&lt;/title&gt;
    &lt;link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"&gt;
&lt;/head&gt;
&lt;body&gt;

&lt;div class="container mt-5"&gt;
        &lt;h1&gt;Bootstrap 4 Dropdown Examples&lt;/h1&gt;

&lt;!-- Basic Dropdown --&gt;
        &lt;h2&gt;Basic Dropdown&lt;/h2&gt;
        &lt;div class="dropdown"&gt;
            &lt;button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;
                Dropdown button
            &lt;/button&gt;
            &lt;div class="dropdown-menu" aria-labelledby="dropdownMenuButton"&gt;
                &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
                &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
                &lt;div class="dropdown-divider"&gt;&lt;/div&gt;
                &lt;a class="dropdown-item" href="#"&gt;Something else here&lt;/a&gt;
            &lt;/div&gt;
        &lt;/div&gt;

&lt;!-- Dropdown in Navbar --&gt;
        &lt;h2&gt;Dropdown in Navbar&lt;/h2&gt;
        &lt;nav class="navbar navbar-expand-lg navbar-light bg-light"&gt;
            &lt;a class="navbar-brand" href="#"&gt;Navbar&lt;/a&gt;
            &lt;button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation"&gt;
                &lt;span class="navbar-toggler-icon"&gt;&lt;/span&gt;
            &lt;/button&gt;
            &lt;div class="collapse navbar-collapse" id="navbarNav"&gt;
                &lt;ul class="navbar-nav"&gt;
                    &lt;li class="nav-item active"&gt;
                        &lt;a class="nav-link" href="#"&gt;Home&lt;/a&gt;
                    &lt;/li&gt;
                    &lt;li class="nav-item dropdown"&gt;
                        &lt;a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;
                            Dropdown
                        &lt;/a&gt;
                        &lt;div class="dropdown-menu" aria-labelledby="navbarDropdown"&gt;
                            &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
                            &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
                            &lt;div class="dropdown-divider"&gt;&lt;/div&gt;
                            &lt;a class="dropdown-item" href="#"&gt;Something else here&lt;/a&gt;
                        &lt;/div&gt;
                    &lt;/li&gt;
                &lt;/ul&gt;
            &lt;/div&gt;
        &lt;/nav&gt;

&lt;!-- Dropdown with Header --&gt;
        &lt;h2&gt;Dropdown with Headers&lt;/h2&gt;
        &lt;div class="dropdown"&gt;
            &lt;button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;
                Dropdown with Headers
            &lt;/button&gt;
            &lt;div class="dropdown-menu" aria-labelledby="dropdownMenuButton"&gt;
                &lt;h6 class="dropdown-header"&gt;Header&lt;/h6&gt;
                &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
                &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
                &lt;div class="dropdown-divider"&gt;&lt;/div&gt;
                &lt;h6 class="dropdown-header"&gt;Another Header&lt;/h6&gt;
                &lt;a class="dropdown-item" href="#"&gt;Something else here&lt;/a&gt;
            &lt;/div&gt;
        &lt;/div&gt;

&lt;!-- Disabled Dropdown --&gt;
        &lt;h2&gt;Disabled Dropdown&lt;/h2&gt;
        &lt;div class="dropdown"&gt;
            &lt;button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" disabled&gt;
                Disabled Dropdown
            &lt;/button&gt;
            &lt;div class="dropdown-menu" aria-labelledby="dropdownMenuButton"&gt;
                &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
                &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
            &lt;/div&gt;
        &lt;/div&gt;
    &lt;/div&gt;

&lt;script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"&gt;&lt;/script&gt;
    &lt;script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.2/dist/umd/popper.min.js"&gt;&lt;/script&gt;
    &lt;script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"&gt;&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h2>&nbsp;</h2>
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