Create responsive sizing utility with Bootstrap 5

After exploring the Bootstrap documentation, I gained a better understanding of how to utilize the sizing utility. For instance:

<link href="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d8bab7b7acabacaab9a898edf6ebf6eb">[email protected]</a>/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="c4a6ababb0b7b0b6a5b484f1eaf7eaf7">[email protected]</a>/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script>


<div class="card w-75">
  <div class="card-body">
    <h5 class="card-title">Card title</h5>
    <h6 class="card-subtitle mb-2 text-body-secondary">Card subtitle</h6>
    <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="card-link">Card link</a>
    <a href="#" class="card-link">Another link</a>
  </div>
</div>

Using the w-75 class allows me to determine the width of the card in relation to its parent element. However, I am now curious about how to make this size responsive.

For instance, I would like the card to be full width (w-100) when the viewport is < md. What is the correct syntax for achieving this? I couldn't find this information in the documentation.

Answer №1

Bootstrap does not include this feature because it is more practical to create a structural grid that contains the cards and allows them to fill the grid. Refer to the grid documentation for more information. It would be redundant for Bootstrap to duplicate the same responsive behavior in two different ways.

If you still prefer to use this method, you can create custom classes and incorporate Bootstrap's breakpoint sizes in your media queries:

.my-card-sizer {
  width: 100%;
}

@media (min-width: 768px) {
  .my-card-sizer {
    width: 75%;
  }
}

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