a Complete Introduction — Pylogix

As we can see, the cards are of the same size with some margin between them.

Card Columns

In earlier versions of Bootstrap, the .card-columns class was used to create a Masonry-like layout where cards were added from top to bottom and left to right. However, in Bootstrap 5, this feature has been removed.

To achieve a similar layout, you can use the grid system in combination with the CSS Masonry layout or a JavaScript plugin like Masonry.js for more complex behaviours.

Here’s how to create a simple Masonry-style layout using the grid system and CSS:

Optimizing Performance

Efficient performance is crucial for creating Bootstrap cards that load quickly and adapt seamlessly. Here are practical techniques to enhance performance while integrating Bootstrap card components like div class card body and h5 class card title.

Lazy Loading Images

Lazy loading delays loading images until they are visible in the viewport, optimizing page speed. Use the loading=”lazy” attribute with card img top for an efficient solution.

img src="https://picsum.photos/300/200" loading="lazy" class="card-img-top" alt="Lazy Loaded Image">

Optimize Image Sizes

Resize images to fit their container dimensions, ensuring faster load times. Use img-fluid with div class card img to automatically scale images.

img src="https://picsum.photos/300/200" class="card-img-top img-fluid" alt="Resized Image">

This ensures the card img top fits perfectly, regardless of the parent element width.

Minify CSS and JavaScript

Minify styles and scripts to reduce file sizes. Combine multiple div class card header elements and minimize custom CSS for faster rendering.

Optimized Example

Instead of applying repetitive or custom styles like this:

div class="card" style="border: 1px solid blue; text-align: center; padding: 20px;">
   div class="card-body">
      h5 style="font-size: 1.5rem; font-weight: bold;">Custom CSS Headerh5>
      p style="font-size: 1rem; color: #555;">This card uses inline styles, which are inefficient.p>
   div>
div>

Use Bootstrap’s utility classes for a cleaner and more maintainable structure:

div class="card border-primary text-center p-3">
   div class="card-body">
      h5 class="card-title text-uppercase fw-bold">Utility Classes Headerh5>
      p class="card-text text-secondary">Using Bootstrap's utility classes ensures better performance and maintainability.p>
   div>
div>

Use SVGs for Icons

SVGs are lightweight and scalable, making them ideal for card headers and decorative elements. They load faster and maintain sharpness across devices.

Example

div class="card text-center">
   div class="card-header bg-success text-white">
      svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" class="bi bi-check-circle" fill="currentColor">
         path d="M16 8.98l.686-.688L7.733.011 6.023 1.72 14.98 10.676z"/>
      svg>
      h5 class="card-title">SVG Optimized Headerh5>
   div>
   div class="card-body">
      p class="card-text">SVGs provide clear visuals with minimal overhead.p>
   div>
div>

Preload and Prefetch Resources

Use rel=”preload” to load critical resources and rel=”prefetch” for anticipating future needs. This is especially useful for heavy card content.

Example

link rel="preload" href="https://example.com/styles.css" as="style">
link rel="prefetch" href="https://example.com/next-page.html">

Reduce DOM Complexity

Avoid overly nested div class card structures that can slow down rendering. Simplify layouts to optimize performance.

Before Optimization

div class="card">
   div class="card-body">
      div>
         div>
            p>Nested Contentp>
         div>
      div>
   div>
div>

After Optimization

div class="card">
   div class="card-body">
      p class="card-text">Optimized Contentp>
   div>
div>

Optimize Fonts

Preload custom fonts or use system fonts to reduce latency. A clean div class card body can further highlight the visual appeal of your cards.

Example

div class="card">
   div class="card-body" style="font-family: 'Roboto', sans-serif;">
      h5 class="card-title">Optimized Fonth5>
      p class="card-text">Preloading ensures faster rendering for card content.p>
   div>
div>

Conclusion

The Bootstrap card component is a powerful addition to the Bootstrap framework, which allows developers to create modern-style web pages without going deeply into how CSS works. You can add card layouts to represent image galleries, dashboard widgets, and display blog posts or products for an e-commerce website by adding CSS classes.

As a result of the new features and components, Bootstrap continues to be a powerful CSS framework available to everyone, particularly to developers who need to create their own responsive and modern-style layouts but lack enough time and budget or the deep knowledge of CSS necessary to produce custom code.

If you’ve got the basics of Bootstrap under your belt but are wondering how to take your Bootstrap skills to the next level, check out our Building Your First Website with Bootstrap 4 course for a quick and fun introduction to the power of Bootstrap.

FAQs on Mastering Bootstrap Card Components for Responsive Design

What Is a Bootstrap Card Component?

A Bootstrap Card Component is a modern and flexible container for content, enabling you to create visually appealing layouts for text, images, and multimedia. Cards are part of Bootstrap’s framework, designed to help developers organize information in a responsive and mobile-friendly manner.

How Do I Create a Bootstrap Card Component?

Creating a Bootstrap Card Component is straightforward. You can use a div with the class card as the container and add content like titles, text, and images within it. Here’s an example:

div class="card" style="width: 18rem;">
  div class="card-body">
    h5 class="card-title">Card Titleh5>
    p class="card-text">This is an example of a Bootstrap card body.p>
  div>
div>

How to Set Height and Width of Card in Bootstrap?

You can customize the bootstrap card width and height of a card using inline styles or Bootstrap’s utility classes. For example:

div class="card" style="width: 20rem; height: 15rem;">
  div class="card-body">
    h5 class="card-title">Custom Cardh5>
    p class="card-text">This card has a custom height and width.p>
  div>
div>

Alternatively, you can also use card height bootstrap utility classes like w-50 or h-100 to set card dimensions responsively.

How to Resize Card in Bootstrap?

To resize a card, you can use card size bootstrap utility classes like w-25, w-50, or w-75 for width, and h-auto or h-100 for height. This ensures your card adapts to the layout without lead in to additional CSS. Here’s an example:

div class="card w-50">
  div class="card-body">
    h5 class="card-title">Responsive Cardh5>
    p class="card-text">This card resizes based on its parent container.p>
  div>
div>

How Do I Create a Card Title in Bootstrap?

To add a title to your card, use an

element with the class=”card-title”. This class ensures the title is styled consistently with Bootstrap’s design standards.

div class="card">
   div class="card-body">
      h5 class="card-title">Card Titleh5>
      p class="card-text">This is an example of a Bootstrap card with a title.p>
   div>
div>

How Can I Use the card-body Class in Bootstrap?

The card-body class is a utility class that provides padding and organizes content within a Bootstrap card. It is the main container for a card’s content.

div class="card">
   div class="card-body">
      h5 class="card-title">Using card-bodyh5>
      p class="card-text">This is the content inside the card-body section.p>
   div>
div>

How to Fix Bootstrap Card Size?

To fix the size of a card, apply specific width and height using inline styles or utility classes. For instance:

div class="card" style="width: 250px; height: 300px;">
  img src="https://picsum.photos/250/150" class="card-img-top" alt="...">
  div class="card-body">
    h5 class="card-title">Fixed Size Cardh5>
    p class="card-text">This card has a fixed size for consistency.p>
  div>
div>

How to Adjust Card Size in Bootstrap?

Card size can be adjusted dynamically using Bootstrap’s utility classes or CSS Grid. Here’s an example of responsive card sizing:

div class="row row-cols-1 row-cols-md-3 g-4">
  div class="col">
    div class="card">
      div class="card-body">
        h5 class="card-title">Card 1h5>
        p class="card-text">Adjustable size based on parent grid.p>
      div>
    div>
  div>
div>

Can I Customize Bootstrap Card Backgrounds and Borders?

Yes, Bootstrap offers extensive customization utility classes. Use bg-primary for background colors and border-success for border styling. Example:

div class="card bg-info border-danger">
  div class="card-body">
    h5 class="card-title">Custom Backgroundh5>
    p class="card-text">This card has a custom background and border.p>
  div>
div>

How Can I Use Images with Cards?

Bootstrap supports images within cards using card-img-top or card-img-bottom. Example:

div class="card">
  img src="https://picsum.photos/300/200" class="card-img-top" alt="Card image">
  div class="card-body">
    h5 class="card-title">Card with Imageh5>
    p class="card-text">This card includes a top image.p>
  div>
div>

How to Use div class card body in Bootstrap?

The div class card body in Bootstrap defines the main content area inside a card. It provides padding and ensures consistent spacing for text, images, and other elements within the card.

div class="card">
  div class="card-body">
    h5 class="card-title">Card Titleh5>
    p class="card-text">This is some text within a card body.p>
  div>
div>

What is p class card text in Bootstrap?

The p class card text in Bootstrap is used to style textual content inside the card body. It applies default typography styles to make the text look clean and professional.

div class="card">
  div class="card-body">
    p class="card-text">This is an example of styled text inside a Bootstrap card.p>
  div>
div>

How to Increase Card Size in Bootstrap?

To increase the card size, adjust its width and height using w-100 for full width or specify dimensions using styles. Example:

div class="card w-75">
  div class="card-body">
    h5 class="card-title">Large Cardh5>
    p class="card-text">This card has an increased size for visibility.p>
  div>
div>

How Can I Make Cards the Same Height?

Use .d-flex and .align-items-stretch:

div class="row g-3">
   div class="col-md-4 d-flex">
      div class="card flex-fill">
         h5 class="card-title">Card 1h5>
         p class="card-text">Aligned with others.p>
      div>
   div>
div>