Bootstrap Panel Default
Overview
Very often we need to separate some little (or not so much) pieces of content in order to force them stand up and get the client's attention-- like listing several handy features providing a listing of articles with a short extract and a solitary powerful image and so on and on.
So we demand a comfortable tool to perfectly wrap our content in a stunning and responsive manner to have it nice and tidy shown on our pages. In the latest version of the most famous mobile-friendly framework-- Bootstrap 3 we used mainly the Bootstrap Panel Default, thumbnail and well elements giving us box containers along with a slight border, quite elliptical edges and eventually-- a light 3d effect. In the latest Bootstrap 4 framework, these are no more. They get got changed collectively by the card piece claiming to be capable of pretty much everything the previous features could possibly do but basically better. It's time to get to learn it better.
How to use the Bootstrap Panel Body:
The cards are delicately styled boxes capable of carrying practically any HTML content within also having a bunch of predefined styling choice for appropriately showcasing its content. It also optionally can have a header and a footer.
In the .card-block section you can have a title having the class .card-title which may be assigned to theh1-- h6 headings in addition to a standard <div> and fo course -- come text wrapped in a section with the .card-text class. If you choose to insert some links along-- assign them the .card-link class to get them suitably differentiated for better user interaction.
The contextual colour classes are employed to further design your complete card sections easily-- just add a .card- ~ one of the contextual colors here like primary, success, info or danger here ~ to the main .card wrapper and in case the background becomes a bit too dim for the content to be readable enough-- also add the .card-inverse class to alter the text color. You can also design only the boundary color tone utilizing the contextual scheme-- this gets done by assigning the .card-outline- ~ the needed shade ~ class again to the primary .card section.
As discussed above the .card-block appears to cover the content remaining a notable padding around it. However when it involves images this might want to avoid this and get the pic stretched the full width of the element.
To have this appearance simply place the <div class="img"><img></div> tag outside the .card-block so you prevent the paddings eventually adding style=" width:100%;" to make certain this is going to resize properly always filling in its container.
A few words regarding the layout-- cards will fill the entire horizontal space available by default so it's a good idea restricting this by putting them in some grid elements. By doing this you can achieve their predictable behavior.
Some instance
Cards are created with as little markup and styles as possible, but still manage to deliver a ton of control and modification. Designed using flexbox, they deliver easy alignment and blend properly with other Bootstrap components.
Here is an example of a standard card with combined content and a set width. Cards have no precise width to start, so they'll naturally occupy the entire width of its parent section. This is smoothly customized with many sizing alternatives.
<div class="card" style="width: 20rem;">
<div class="img"><img class="card-img-top" src="..." alt="Card picture caption"></div>
<div class="card-block">
<h4 class="card-title">Card caption</h4>
<p class="card-text">Some fast sample message to build on the card title as well as compose the bulk of the card's material.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>Web site material kinds
Cards maintain a broad variety of content, including pictures, text, list collections, hyperlinks, and more. Below are illustrations of what's provided.
Blocks
The building block of a card is the .card-block. Use it whenever you need a padded area within a card.
<div class="card">
<div class="card-block">
This is some message in a card block.
</div>
</div>Names, information, and urls
<div class="card">
<div class="card-block">
<h4 class="card-title">Card title</h4>
<h6 class="card-subtitle mb-2 text-muted">Card subtitle</h6>
<p class="card-text">Some fast example message to improve the card title and compose the mass of the card's content.</p>
<a href="#" class="card-link">Card link</a>
<a href="#" class="card-link">Another link</a>
</div>
</div>Pictures
.card-img-top puts a pic to the very top of the card. With .card-text, text could be put on the card. Text in .card-text can also be styled with the standard HTML tags.
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card picture cap"></div>
<div class="card-block">
<p class="card-text">Some fast example message to build on the card title and also compose the bulk of the card's web content.</p>
</div>
</div>List groups
Create lists of content in a card along with a flush list group.
<div class="card">
<ul class="list-group list-group-flush">
<li class="list-group-item">Cras justo odio</li>
<li class="list-group-item">Dapibus ac facilisis in</li>
<li class="list-group-item">Vestibulum at eros</li>
</ul>
</div>Mix up and go with various material kinds to generate the card you want, or toss everything in there.Displayed here are picture layouts, blocks, information looks, plus a list group - all wrapped in a fixed-width card.
<div class="card" style="width: 20rem;">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<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>
</div>
<ul class="list-group list-group-flush">
<li class="list-group-item">Cras justo odio</li>
<li class="list-group-item">Dapibus ac facilisis in</li>
<li class="list-group-item">Vestibulum at eros</li>
</ul>
<div class="card-block">
<a href="#" class="card-link">Card link</a>
<a href="#" class="card-link">Another link</a>
</div>
</div>Header and footer
Create an extra header and/or footer in a card.
<div class="card">
<div class="card-header">
Featured
</div>
<div class="card-block">
<h4 class="card-title">Unique title therapy</h4>
<p class="card-text">With supporting message below as an all-natural lead-in to extra content.</p>
<a href="#" class="btn btn-primary">Go someplace</a>
</div>
</div>Card headers can be styled by including .card-header to <h*> sections.
<div class="card">
<h3 class="card-header">Featured</h3>
<div class="card-block">
<h4 class="card-title">Special title treatment</h4>
<p class="card-text">With supporting message below as a natural lead-in to extra content.</p>
<a href="#" class="btn btn-primary">Go someplace</a>
</div>
</div>
<div class="card">
<div class="card-header">
Quote
</div>
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card text-center">
<div class="card-header">
Featured
</div>
<div class="card-block">
<h4 class="card-title">Special title treatment</h4>
<p class="card-text">With supporting text below as an all-natural lead-in to extra material.</p>
<a href="#" class="btn btn-primary">Go someplace</a>
</div>
<div class="card-footer text-muted">
2 days ago
</div>
</div>Proportions
Cards have no certain width to begin, so they should be 100% large until otherwise stated. You may modify this as needed with custom CSS, grid classes, grid Sass mixins, or utilities.
Operating grid markup
Using the grid, wrap cards in columns and rows as required.
<div class="row">
<div class="col-sm-6">
<div class="card">
<div class="card-block">
<h3 class="card-title">Special title treatment</h3>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
<div class="col-sm-6">
<div class="card">
<div class="card-block">
<h3 class="card-title">Special title treatment</h3>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
</div>Using utilities
Use handful of offered sizing utilities to quickly establish a card's width.
<div class="card w-75">
<div class="card-block">
<h3 class="card-title">Card title</h3>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Button</a>
</div>
</div>
<div class="card w-50">
<div class="card-block">
<h3 class="card-title">Card title</h3>
<p class="card-text">With sustaining message listed below as an all-natural lead-in to extra web content.</p>
<a href="#" class="btn btn-primary">Button</a>
</div>
</div>
<div class="card" style="width: 20rem;">
<div class="card-block">
<h3 class="card-title">Special title treatment</h3>
<p class="card-text">With supporting text below as a natural lead-in to added material.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>Information positioning
You can rapidly change the message placement of any type of card-- in its whole or certain components-- with text align classes.
<div class="card" style="width: 20rem;">
<div class="card-block">
<h4 class="card-title">Special title treatment</h4>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
<div class="card text-center" style="width: 20rem;">
<div class="card-block">
<h4 class="card-title">Special title treatment</h4>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
<div class="card text-right" style="width: 20rem;">
<div class="card-block">
<h4 class="card-title">Special title treatment</h4>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>Web site navigation
Include some navigation to a card's header (or block) with Bootstrap's nav components.
<div class="card text-center">
<div class="card-header">
<ul class="nav nav-tabs card-header-tabs">
<li class="nav-item">
<a class="nav-link active" href="#">Active</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
</div>
<div class="card-block">
<h4 class="card-title">Special title treatment</h4>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
<div class="card text-center">
<div class="card-header">
<ul class="nav nav-pills card-header-pills">
<li class="nav-item">
<a class="nav-link active" href="#">Active</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
</div>
<div class="card-block">
<h4 class="card-title">Special title treatment</h4>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>Images
Cards provide some features for working using images. Choose from attaching "image caps" at possibly end of a card, overlaying pictures with card content, or simply embedding the image in a card.
Illustration caps
Similar to footers and headers, cards can feature top and bottom "image caps"-- images at the top or bottom of a card.
<div class="card mb-3">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card">
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
<div class="img"><img class="card-img-bottom" src="..." alt="Card image cap"></div>
</div>Illustration cover
Turn an image into a card foundation and overlay your card's text. Depending on the pic, you may or may not need .card-inverse (see below).
<div class="card card-inverse">
<div class="img"><img class="card-img" src="..." alt="Card image"></div>
<div class="card-img-overlay">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>Card varieties
Cards offer different alternatives for modifying their backgrounds, borders, and color.
Inverted message
Initially, cards use dark text and suppose a light background. You can alter that by toggling the color scheme of text within, in addition to that of the card's subcomponents, with .card-inverse. Then, specify a dark background-color and border-color to go with it.
You may also use .card-inverse along with the contextual backgrounds versions.
<div class="card card-inverse" style="background-color: #333; border-color: #333;">
<div class="card-block">
<h3 class="card-title">Special title treatment</h3>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>Background variations
Cards feature their own variant classes for swiftly altering the background-color and border-color of a card. Darker colors request the use of .card-inverse.
<div class="card card-inverse card-primary mb-3 text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card card-inverse card-success mb-3 text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card card-inverse card-info mb-3 text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card card-inverse card-warning mb-3 text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card card-inverse card-danger text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>Showing meaning to assistive modern technologies
Utilizing color to add meaning only delivers a visual indication, which will not be shared to users of assistive technologies-- like screen readers. Make sure that info denoted by the color is either obvious from the content itself (e.g. the visible text), or is included through different means, such as extra message hidden with the .sr-only class.
Outline cards
Looking for a colored card, but not the significant background colors they bring? Change the default modifier classes with the .card-outline-* ones to design just the border-color of a card.
<div class="card card-outline-primary mb-3 text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card card-outline-secondary mb-3 text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card card-outline-success mb-3 text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card card-outline-info mb-3 text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card card-outline-warning mb-3 text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>
<div class="card card-outline-danger text-center">
<div class="card-block">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>
</div>
</div>Card arranging
In addition to styling the content within cards, Bootstrap 4 provides certain options for laying out collection of cards. For the present being, these design choices are not yet responsive.
Card groups
Utilize card groups to make cards as a single, attached item with identical width and height columns. Card groups use display: flex; to accomplish their uniform sizing.
<div class="card-group">
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>When using card groups with footers, their content will automatically line up.
<div class="card-group">
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
</div>Card decks
Need a collection of equal width and height cards that aren't affixed to each other? Use card decks.
<div class="card-deck">
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>Like with card groups, card footers in decks are going to automatically line up.
<div class="card-deck">
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
<div class="card">
<div class="img"><img class="card-img-top" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
</div>Card columns
Cards are ordered from top to bottom and left to.
Carry on! Your mileage with card columns may differ. To prevent cards breaking across columns, set them to display: inline-block as column-break-inside: avoid isn't a bulletproof solution yet.
<div class="card-columns">
<div class="card">
<div class="img"><img class="card-img-top img-fluid" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title that wraps to a new line</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
</div>
</div>
<div class="card p-3">
<blockquote class="card-block card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>
<small class="text-muted">
Someone famous in <cite title="Source Title">Source Title</cite>
</small>
</footer>
</blockquote>
</div>
<div class="card">
<div class="img"><img class="card-img-top img-fluid" src="..." alt="Card image cap"></div>
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card card-inverse card-primary p-3 text-center">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat.</p>
<footer>
<small>
Someone famous in <cite title="Source Title">Source Title</cite>
</small>
</footer>
</blockquote>
</div>
<div class="card text-center">
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card">
<div class="img"><img class="card-img img-fluid" src="..." alt="Card image"></div>
</div>
<div class="card p-3 text-right">
<blockquote class="card-blockquote">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
<footer>
<small class="text-muted">
Someone famous in <cite title="Source Title">Source Title</cite>
</small>
</footer>
</blockquote>
</div>
<div class="card">
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>Card columns can also be expanded as well as personalized with some added code. Revealed below is an extension of the .card-columns course making use of the exact same CSS-- CSS columns-- to create a collection of responsive tiers for changing the number of columns.
.card-columns
@include media-breakpoint-only(lg)
column-count: 4;
@include media-breakpoint-only(xl)
column-count: 5;Conclusions
So generally this is the way the new to Bootstrap 4 card section becomes efficiently built. As always aiming for easiness and simplicity the new Bootstrap version integrates the functionality of several sections into a single and powerful one. Right now you should select the features you need to be outlined in some cards.
Take a look at a few online video short training about Bootstrap Panel Example:
Related topics:
Bootstrap Panel-Cards: authoritative information
Insights on how can we build Bootstrap 4 cards just the same height?
Having need of past panel look for cards
