Understanding Bootstrap 5 Cards

Oct 13, 2025 by wbrum.org 37 views

Introduction

As a Shiny developer, you're likely familiar with the need to create visually appealing and user-friendly interfaces. One way to achieve this is by incorporating Bootstrap 5 (BS5) features into your Shiny app. The bslib package provides a convenient way to use BS5 in R, making it easier to create responsive and mobile-first interfaces. However, when working with cards, you may encounter situations where you want to make them horizontal. In this article, we'll explore whether it's possible to make a card horizontal in Shiny using the bslib package.

Understanding Bootstrap 5 Cards

Before we dive into making cards horizontal, let's quickly review what Bootstrap 5 cards are and how they work. A card is a versatile component that can be used to display various types of content, such as text, images, and links. Cards are designed to be responsive, meaning they adapt to different screen sizes and devices. By default, cards are displayed vertically, with a header, body, and footer.

The Challenge: Making Cards Horizontal

While cards are great for displaying content vertically, there may be situations where you want to display them horizontally. For example, you might want to create a row of cards that take up the full width of a container. However, by default, cards are not designed to be horizontal. So, how can you make a card horizontal in Shiny using the bslib package?

Using the bslib Package to Create Horizontal Cards

The bslib package provides a range of functions for working with Bootstrap 5 components, including cards. To create a horizontal card, you can use the bs_card() function and set the class argument to "card-horizontal". Here's an example:

library(bslib)
card <- bs_card(
class = "card-horizontal",
header = "Horizontal Card",
body = "This is a horizontal card.",
footer = "Footer content"
)
print(card)

This code creates a horizontal card with a header, body, and footer. However, as you can see, the card is not taking up the full width of the container. To fix this, you can add a container element and set its class to "container-fluid". Here's the updated code:

library(bslib)
container <- bs_container(
class = "container-fluid",
fluid = TRUE,
bs_card(
class = "card-horizontal",
header = "Horizontal Card",
body = "This is a horizontal card.",
footer = "Footer content"
)
)
print(container)

This code creates a container with a horizontal card that takes up the full width of the container.

Customizing Horizontal Cards

While the bs_card() function provides a convenient way to create horizontal cards, you may want to customize their appearance. For example, you might want to change the background color or add a border. To do this, you can use the style argument to add custom CSS classes to the card. Here's an example:

library(bslib)
card <- bs_card(
class = "card-horizontal",
style = "background-color: #f2f2f2; border: 1px solid #ddd;",
header = "Horizontal Card",
body = "This is a horizontal card.",
footer = "Footer content"
)
print(card)

This code creates a horizontal card with a custom background color and border.

Conclusion

In this article, we explored whether it's possible to make a card horizontal in Shiny using the bslib package. We learned how to create horizontal cards using the bs_card() function and how to customize their appearance using custom CSS classes. By following the examples provided in this article, you should be able to create horizontal cards that take up the full width of a container and customize their appearance to suit your needs.

Example Use Cases

Here are a few example use cases for horizontal cards in Shiny:

Creating a row of cards: You can use horizontal cards to create a row of cards that take up the full width of a container. This is useful for displaying a list of items or a series of images.
Displaying a timeline: You can use horizontal cards to display a timeline of events. Each card can represent a single event, and the cards can be arranged horizontally to create a timeline.
Creating a dashboard: You can use horizontal cards to create a dashboard with multiple panels. Each panel can be represented by a horizontal card, and the cards can be arranged horizontally to create a dashboard.

Code Snippets

Here are a few code snippets that demonstrate how to create horizontal cards in Shiny:

Creating a horizontal card: ```r library(bslib)

card <- bs_card( class = "card-horizontal", header = "Horizontal Card", body = "This is a horizontal card.", footer = "Footer content" )

print(card)

* **Creating a container with a horizontal card**: ```r
library(bslib)
container <- bs_container(
class = "container-fluid",
fluid = TRUE,
bs_card(
class = "card-horizontal",
header = "Horizontal Card",
body = "This is a horizontal card.",
footer = "Footer content"
)
)
print(container)

Creating a horizontal card with custom styles: ```r library(bslib)

card <- bs_card( class = "card-horizontal", style = "background-color: #f2f2f2; border: 1px solid #ddd;", header = "Horizontal Card", body = "This is a horizontal card.", footer = "Footer content" )

print(card)

**References**
--------------

Bootstrap 5 Documentation: <https://getbootstrap.com/docs/5.0/components/card/&gt;
bslib Package Documentation: <https://cran.r-project.org/web/packages/bslib/bslib.pdf&gt;&lt;br/&gt;
Is it possible to make a card horizontal in Shiny with the bslib package? - Q&A
====================================================================

Introduction
In our previous article, we explored whether it's possible to make a card horizontal in Shiny using the bslib package. We learned how to create horizontal cards using the bs_card() function and how to customize their appearance using custom CSS classes. However, we know that there are many more questions and scenarios that can arise when working with horizontal cards in Shiny. In this article, we'll answer some of the most frequently asked questions about making cards horizontal in Shiny with the bslib package.
Q: What is the difference between a horizontal card and a vertical card?
A: A horizontal card is a card that takes up the full width of a container, whereas a vertical card is a card that is displayed in a column. By default, cards are displayed vertically, but you can use the bs_card() function to create a horizontal card.
Q: How do I create a horizontal card in Shiny using the bslib package?
A: To create a horizontal card in Shiny using the bslib package, you can use the bs_card() function and set the class argument to &quot;card-horizontal&quot;. Here's an example:
library(bslib)

# Create a horizontal card
card &lt;- bs_card(
  class = &quot;card-horizontal&quot;,
  header = &quot;Horizontal Card&quot;,
  body = &quot;This is a horizontal card.&quot;,
  footer = &quot;Footer content&quot;
)

# Print the card
print(card)
</code></pre>
<h2><strong>Q: How do I customize the appearance of a horizontal card in Shiny?</strong></h2>
<p>A: To customize the appearance of a horizontal card in Shiny, you can use the <code>style</code> argument to add custom CSS classes to the card. Here's an example:</p>
<pre><code class="hljs">library(bslib)

# Create a horizontal card with custom styles
card &lt;- bs_card(
  class = &quot;card-horizontal&quot;,
  style = &quot;background-color: #f2f2f2; border: 1px solid #ddd;&quot;,
  header = &quot;Horizontal Card&quot;,
  body = &quot;This is a horizontal card.&quot;,
  footer = &quot;Footer content&quot;
)

# Print the card
print(card)
</code></pre>
<h2><strong>Q: Can I use horizontal cards in a Shiny app?</strong></h2>
<p>A: Yes, you can use horizontal cards in a Shiny app. In fact, horizontal cards are a great way to display multiple items or panels in a Shiny app. You can use the <code>bs_card()</code> function to create horizontal cards and then use the <code>bs_container()</code> function to create a container that holds the cards.</p>
<h2><strong>Q: How do I create a container that holds multiple horizontal cards in Shiny?</strong></h2>
<p>A: To create a container that holds multiple horizontal cards in Shiny, you can use the <code>bs_container()</code> function and set the <code>class</code> argument to <code>&quot;container-fluid&quot;</code>. Then, you can use the <code>bs_card()</code> function to create multiple horizontal cards and add them to the container. Here's an example:</p>
<pre><code class="hljs">library(bslib)

# Create a container that holds multiple horizontal cards
container &lt;- bs_container(
  class = &quot;container-fluid&quot;,
  fluid = TRUE,
  bs_card(
    class = &quot;card-horizontal&quot;,
    header = &quot;Card 1&quot;,
    body = &quot;This is card 1.&quot;,
    footer = &quot;Footer content&quot;
  ),
  bs_card(
    class = &quot;card-horizontal&quot;,
    header = &quot;Card 2&quot;,
    body = &quot;This is card 2.&quot;,
    footer = &quot;Footer content&quot;
  ),
  bs_card(
    class = &quot;card-horizontal&quot;,
    header = &quot;Card 3&quot;,
    body = &quot;This is card 3.&quot;,
    footer = &quot;Footer content&quot;
  )
)

# Print the container
print(container)
</code></pre>
<h2><strong>Q: Can I use horizontal cards with other Bootstrap components in Shiny?</strong></h2>
<p>A: Yes, you can use horizontal cards with other Bootstrap components in Shiny. In fact, horizontal cards are designed to work seamlessly with other Bootstrap components, such as buttons, forms, and navigation bars. You can use the <code>bs_card()</code> function to create horizontal cards and then use other Bootstrap components to create a complete user interface.</p>
<h2><strong>Q: How do I troubleshoot issues with horizontal cards in Shiny?</strong></h2>
<p>A: If you're experiencing issues with horizontal cards in Shiny, there are several things you can try to troubleshoot the problem. First, make sure that you're using the latest version of the bslib package. Then, check your code for any errors or typos. Finally, try using the <code>debug()</code> function to see if there are any issues with the code that's being executed.</p>
<h2><strong>Conclusion</strong></h2>
<p>In this article, we answered some of the most frequently asked questions about making cards horizontal in Shiny with the bslib package. We learned how to create horizontal cards, customize their appearance, and use them in Shiny apps. We also discussed how to troubleshoot issues with horizontal cards and how to use them with other Bootstrap components. By following the examples and tips provided in this article, you should be able to create horizontal cards that take up the full width of a container and customize their appearance to suit your needs.</p>
<h2><strong>Example Use Cases</strong></h2>
<p>Here are a few example use cases for horizontal cards in Shiny:</p>
<ul>
<li><strong>Creating a row of cards</strong>: You can use horizontal cards to create a row of cards that take up the full width of a container. This is useful for displaying a list of items or a series of images.</li>
<li><strong>Displaying a timeline</strong>: You can use horizontal cards to display a timeline of events. Each card can represent a single event, and the cards can be arranged horizontally to create a timeline.</li>
<li><strong>Creating a dashboard</strong>: You can use horizontal cards to create a dashboard with multiple panels. Each panel can be represented by a horizontal card, and the cards can be arranged horizontally to create a dashboard.</li>
</ul>
<h2><strong>Code Snippets</strong></h2>
<p>Here are a few code snippets that demonstrate how to create horizontal cards in Shiny:</p>
<ul>
<li><strong>Creating a horizontal card</strong>: ```r
library(bslib)</li>
</ul>

<p>card &lt;- bs_card(
class = &quot;card-horizontal&quot;,
header = &quot;Horizontal Card&quot;,
body = &quot;This is a horizontal card.&quot;,
footer = &quot;Footer content&quot;
)</p>

<p>print(card)</p>
<pre><code class="hljs">* **Creating a container with a horizontal card**: ```r
library(bslib)

# Create a container with a horizontal card
container &lt;- bs_container(
  class = &quot;container-fluid&quot;,
  fluid = TRUE,
  bs_card(
    class = &quot;card-horizontal&quot;,
    header = &quot;Horizontal Card&quot;,
    body = &quot;This is a horizontal card.&quot;,
    footer = &quot;Footer content&quot;
  )
)

# Print the container
print(container)
</code></pre>
<ul>
<li><strong>Creating a horizontal card with custom styles</strong>: ```r
library(bslib)</li>
</ul>

<p>card &lt;- bs_card(
class = &quot;card-horizontal&quot;,
style = &quot;background-color: #f2f2f2; border: 1px solid #ddd;&quot;,
header = &quot;Horizontal Card&quot;,
body = &quot;This is a horizontal card.&quot;,
footer = &quot;Footer content&quot;
)</p>

<p>print(card)</p>
<pre><code class="hljs">**References**
--------------

* **Bootstrap 5 Documentation**: &lt;https://getbootstrap.com/docs/5.0/components/card/&gt;
* **bslib Package Documentation**: &lt;https://cran.r-project.org/web/packages/bslib/bslib.pdf&gt;</code></pre>


                
                    
                        

                    
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