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Cards (カード)

カードは、複数のバリエーションとオプションで柔軟で拡張可能なコンテナを提供します。カードの使い方の例を示します。

目次

About

card は柔軟で拡張ができるコンテナです。headers や footers のオプション、多様なコンテンツ、背景色、表示オプション が含まれています。 Bootstrap3の panels、wells、thumbnails は card に置きかわります。これらのコンポーネントの機能は card のクラスとして利用できます。

Example

カードは少ないマークアップとスタイルで構築されていますが, 多くのカスタマイズが可能です。Flexboxで構築されているため、簡単に配置ができ、他のコンポーネントと組み合わせ可能です。 デフォルトでは margin の設定がないので, 必要に応じて spacing utilities を使用します。

以下は,幅が固定されたカードの例です。カードには固定幅がないので, 親要素の幅に広がります。これは sizing options でカスタマイズ可能です。

PlaceholderImage cap
Card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Go somewhere
<div class="card" style="width: 18rem;">
  <img src="..." class="card-img-top" alt="...">
  <div class="card-body">
    <h5 class="card-title">Card title</h5>
    <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="btn btn-primary">Go somewhere</a>
  </div>
</div>

Content types

画像やテキスト、リスト、リンクなどカードは多様なコンテントをサポートしています。下記は例になります。

Body

カードを構築するクラスは .card-body です。paddingが必要なsectionの時はいつでも利用できます。

This is some text within a card body.
<div class="card">
  <div class="card-body">
    This is some text within a card body.
  </div>
</div>

カードタイトルは <h*> タグに .card-title を適用します。 <a> タグに .card-link を適用するとリンクが追加されます。 サブタイトルは、<h*> タグに .card-subtitle を適用します。 .card-title.card-subtitle のアイテムが .card-body に適用すると、良い感じに配置されます。

Card title
Card subtitle

Some quick example text to build on the card title and make up the bulk of the card's content.

Card link Another link
<div class="card" style="width: 18rem;">
  <div class="card-body">
    <h5 class="card-title">Card title</h5>
    <h6 class="card-subtitle mb-2 text-muted">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>

Images

.card-img-top は画像を上に持ってきます。 .card-text はテキストをカードに追加できます。(標準のHTMLタグでスタイルを設定可能)

PlaceholderImage cap

Some quick example text to build on the card title and make up the bulk of the card's content.

<div class="card" style="width: 18rem;">
  <img src="..." class="card-img-top" alt="...">
  <div class="card-body">
    <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>
</div>

List groups

.list-group-flush を用いてカードの中にリストを作成できます。

  • Cras justo odio
  • Dapibus ac facilisis in
  • Vestibulum at eros
<div class="card" style="width: 18rem;">
  <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>
Featured
  • Cras justo odio
  • Dapibus ac facilisis in
  • Vestibulum at eros
<div class="card" style="width: 18rem;">
  <div class="card-header">
    Featured
  </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>
  • Cras justo odio
  • Dapibus ac facilisis in
  • Vestibulum at eros
<div class="card" style="width: 18rem;">
  <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-footer">
    Card footer
  </div>
</div>

Kitchen sink

複数のコンテンツをカードの中に入れても横幅は固定になります。

PlaceholderImage cap
Card title

Some quick example text to build on the card title and make up the bulk of the card's content.

  • Cras justo odio
  • Dapibus ac facilisis in
  • Vestibulum at eros
<div class="card" style="width: 18rem;">
  <img src="..." class="card-img-top" alt="...">
  <div class="card-body">
    <h5 class="card-title">Card title</h5>
    <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-body">
    <a href="#" class="card-link">Card link</a>
    <a href="#" class="card-link">Another link</a>
  </div>
</div>

ヘッダーやフッターをカードに入れるオプションがあります.

Featured
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
<div class="card">
  <div class="card-header">
    Featured
  </div>
  <div class="card-body">
    <h5 class="card-title">Special title treatment</h5>
    <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>

<h*>.card-header を適用します。

Featured
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
<div class="card">
  <h5 class="card-header">Featured</h5>
  <div class="card-body">
    <h5 class="card-title">Special title treatment</h5>
    <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>
Quote

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.

Someone famous in Source Title
<div class="card">
  <div class="card-header">
    Quote
  </div>
  <div class="card-body">
    <blockquote class="blockquote mb-0">
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
      <footer class="blockquote-footer">Someone famous in <cite title="Source Title">Source Title</cite></footer>
    </blockquote>
  </div>
</div>
Featured
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
<div class="card text-center">
  <div class="card-header">
    Featured
  </div>
  <div class="card-body">
    <h5 class="card-title">Special title treatment</h5>
    <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 class="card-footer text-muted">
    2 days ago
  </div>
</div>

Sizing

カードは、特に指定されていない限り、width は 100% の幅を想定しています。必要に応じて、カスタム CSS、グリッドクラス、グリッド Sass ミックスイン、ユーティリティを使って変更することができます。

Using grid markup

グリッドレイアウトでは columns と rows の中にカードを使ってください。

Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
<div class="row">
  <div class="col-sm-6">
    <div class="card">
      <div class="card-body">
        <h5 class="card-title">Special title treatment</h5>
        <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-body">
        <h5 class="card-title">Special title treatment</h5>
        <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

カードの幅は available sizing utilities を使います。

Card title

With supporting text below as a natural lead-in to additional content.

Button
Card title

With supporting text below as a natural lead-in to additional content.

Button
<div class="card w-75">
  <div class="card-body">
    <h5 class="card-title">Card title</h5>
    <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-body">
    <h5 class="card-title">Card title</h5>
    <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>

Using custom CSS

スタイルシートやインラインスタイルに幅を適用できます。

Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
<div class="card" style="width: 18rem;">
  <div class="card-body">
    <h5 class="card-title">Special title treatment</h5>
    <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>

Text alignment

テキストの配置は text align classes で変更できます。

Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
<div class="card" style="width: 18rem;">
  <div class="card-body">
    <h5 class="card-title">Special title treatment</h5>
    <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: 18rem;">
  <div class="card-body">
    <h5 class="card-title">Special title treatment</h5>
    <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: 18rem;">
  <div class="card-body">
    <h5 class="card-title">Special title treatment</h5>
    <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>

nav components を適用するとカードのヘッダーにナビゲーションを適用できます。

Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
<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" aria-current="true" 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="#" tabindex="-1" aria-disabled="true">Disabled</a>
      </li>
    </ul>
  </div>
  <div class="card-body">
    <h5 class="card-title">Special title treatment</h5>
    <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>
Special title treatment

With supporting text below as a natural lead-in to additional content.

Go somewhere
<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="#" tabindex="-1" aria-disabled="true">Disabled</a>
      </li>
    </ul>
  </div>
  <div class="card-body">
    <h5 class="card-title">Special title treatment</h5>
    <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

画像を扱うためのオプションが存在します。カードの両端に “image caps” を追加したり、イメージにカードの内容を重ねたり、 イメージをカードに埋め込んだりすることが可能です。

Image caps

ヘッダーやフッターと同様に、カードにはカードの上部と下部の"image caps”(カードの上部または下部の画像)を含めることができます。

PlaceholderImage cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

PlaceholderImage cap
<div class="card mb-3">
  <img src="..." class="card-img-top" alt="...">
  <div class="card-body">
    <h5 class="card-title">Card title</h5>
    <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-body">
    <h5 class="card-title">Card title</h5>
    <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>
  <img src="..." class="card-img-bottom" alt="...">
</div>

Image overlays

画像をカードの背景にして, テキストを重ねることができます。

PlaceholderCard image
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

<div class="card bg-dark text-white">
  <img src="..." class="card-img" alt="...">
  <div class="card-img-overlay">
    <h5 class="card-title">Card title</h5>
    <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">Last updated 3 mins ago</p>
  </div>
</div>
コンテンツは画像の高さを超えないようにしてください。もしコンテンツが画像より大きい場合、画像をはみだしてコンテンツが表示されます。

Horizontal

グリッドクラスとユーティリティクラスの組み合わせを使用することで、モバイルフレンドリーでレスポンシブな方法でカードを水平にすることができます。下の例では、.g-0 でグリッド・ガッターを削除し、 .col-md-* クラスを使用して、mdブレイクポイントでカードを水平にしています。カードの内容によっては、さらに調整が必要になるかもしれません。

PlaceholderImage
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

<div class="card mb-3" style="max-width: 540px;">
  <div class="row g-0">
    <div class="col-md-4">
      <img src="..."  alt="...">
    </div>
    <div class="col-md-8">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
</div>

Card styles

backgrounds、borders、color をカスタマイズするためのオプションがあります。

Background and color

text and background utilities でカードの外観を変更できます。

Header
Primary card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Secondary card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Success card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Danger card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Warning card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Info card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Light card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Dark card title

Some quick example text to build on the card title and make up the bulk of the card's content.

<div class="card text-white bg-primary mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Primary card title</h5>
    <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>
</div>
<div class="card text-white bg-secondary mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Secondary card title</h5>
    <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>
</div>
<div class="card text-white bg-success mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Success card title</h5>
    <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>
</div>
<div class="card text-white bg-danger mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Danger card title</h5>
    <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>
</div>
<div class="card bg-warning mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Warning card title</h5>
    <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>
</div>
<div class="card text-body  bg-info mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Info card title</h5>
    <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>
</div>
<div class="card bg-light mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Light card title</h5>
    <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>
</div>
<div class="card text-white bg-dark mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Dark card title</h5>
    <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>
</div>
Conveying meaning to assistive technologies

Using color to add meaning only provides a visual indication, which will not be conveyed to users of assistive technologies – such as screen readers. Ensure that information denoted by the color is either obvious from the content itself (e.g. the visible text), or is included through alternative means, such as additional text hidden with the .sr-only class.

Border

border utilities を使って border-color を変更できます。 .text-{color} クラスは親の .card や サブセット に以下のように置くことができます。

Header
Primary card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Secondary card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Success card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Danger card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Warning card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Info card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Light card title

Some quick example text to build on the card title and make up the bulk of the card's content.

Header
Dark card title

Some quick example text to build on the card title and make up the bulk of the card's content.

<div class="card border-primary mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body text-primary">
    <h5 class="card-title">Primary card title</h5>
    <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>
</div>
<div class="card border-secondary mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body text-secondary">
    <h5 class="card-title">Secondary card title</h5>
    <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>
</div>
<div class="card border-success mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body text-success">
    <h5 class="card-title">Success card title</h5>
    <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>
</div>
<div class="card border-danger mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body text-danger">
    <h5 class="card-title">Danger card title</h5>
    <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>
</div>
<div class="card border-warning mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Warning card title</h5>
    <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>
</div>
<div class="card border-info mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Info card title</h5>
    <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>
</div>
<div class="card border-light mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body">
    <h5 class="card-title">Light card title</h5>
    <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>
</div>
<div class="card border-dark mb-3" style="max-width: 18rem;">
  <div class="card-header">Header</div>
  <div class="card-body text-dark">
    <h5 class="card-title">Dark card title</h5>
    <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>
</div>

Mixins utilities

header や footer の枠線を変更したり、 .bg-transparent を適用して背景色をなくすこともできます。

Header
Success card title

Some quick example text to build on the card title and make up the bulk of the card's content.

<div class="card border-success mb-3" style="max-width: 18rem;">
  <div class="card-header bg-transparent border-success">Header</div>
  <div class="card-body text-success">
    <h5 class="card-title">Success card title</h5>
    <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>
  <div class="card-footer bg-transparent border-success">Footer</div>
</div>

Card layout

スタイルに加えて、一連のカードをレイアウトするオプションがあります。レスポンシブには対応していません。

Card groups

幅と高さが等しいカラムでは card-group を使用します。

PlaceholderImage cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

Last updated 3 mins ago

PlaceholderImage cap
Card title

This card has supporting text below as a natural lead-in to additional content.

Last updated 3 mins ago

PlaceholderImage cap
Card title

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.

Last updated 3 mins ago

<div class="card-group">
  <div class="card">
    <img src="..." class="card-img-top" alt="...">
    <div class="card-body">
      <h5 class="card-title">Card title</h5>
      <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">
    <img src="..." class="card-img-top" alt="...">
    <div class="card-body">
      <h5 class="card-title">Card title</h5>
      <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">
    <img src="..." class="card-img-top" alt="...">
    <div class="card-body">
      <h5 class="card-title">Card title</h5>
      <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>

フッターは自動的に整列されます。

PlaceholderImage cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

PlaceholderImage cap
Card title

This card has supporting text below as a natural lead-in to additional content.

PlaceholderImage cap
Card title

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.

<div class="card-group">
  <div class="card">
    <img src="..." class="card-img-top" alt="...">
    <div class="card-body">
      <h5 class="card-title">Card title</h5>
      <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">
    <img src="..." class="card-img-top" alt="...">
    <div class="card-body">
      <h5 class="card-title">Card title</h5>
      <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">
    <img src="..." class="card-img-top" alt="...">
    <div class="card-body">
      <h5 class="card-title">Card title</h5>
      <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>

Grid cards

Bootstrapグリッドシステムとその.row-cols クラスを使用して、行ごとに表示するグリッド列の数を制御します(カードの周りに巻かれた)。例えば、ここでは .row-cols-1 は1列にカードをレイアウトし、.row-cols-md-2 は4枚のカードを中段のブレークポイントから上に向かって複数行に渡って等幅に分割しています。

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content.

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

<div class="row row-cols-1 row-cols-md-2 g-4">
  <div class="col">
    <div class="card">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
  <div class="col">
    <div class="card">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
  <div class="col">
    <div class="card">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content.</p>
      </div>
    </div>
  </div>
  <div class="col">
    <div class="card">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
</div>

.row-cols-3 に変更すると、4枚目のカードラップが表示されます。

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content.

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

<div class="row row-cols-1 row-cols-md-3 g-4">
  <div class="col">
    <div class="card">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
  <div class="col">
    <div class="card">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
  <div class="col">
    <div class="card">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content.</p>
      </div>
    </div>
  </div>
  <div class="col">
    <div class="card">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
</div>

同じ高さが必要な場合は、カードに .h-100 を追加します。デフォルトで同じ高さにしたい場合は、Sassで $card-height: 100% を設定することができます。

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

PlaceholderImage cap
Card title

This is a short card.

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content.

PlaceholderImage cap
Card title

This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

<div class="row row-cols-1 row-cols-md-3 g-4">
  <div class="col">
    <div class="card h-100">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
  <div class="col">
    <div class="card h-100">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a short card.</p>
      </div>
    </div>
  </div>
  <div class="col">
    <div class="card h-100">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content.</p>
      </div>
    </div>
  </div>
  <div class="col">
    <div class="card h-100">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
</div>

カードグループと同じように、カードのフッターが自動的に並びます。

PlaceholderImage cap
Card title

This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.

PlaceholderImage cap
Card title

This card has supporting text below as a natural lead-in to additional content.

PlaceholderImage cap
Card title

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.

<div class="row row-cols-1 row-cols-md-3 g-4">
  <div class="col">
    <div class="card h-100">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
  <div class="col">
    <div class="card h-100">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
  <div class="col">
    <div class="card h-100">
      <img src="..." class="card-img-top" alt="...">
      <div class="card-body">
        <h5 class="card-title">Card title</h5>
        <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>
</div>

Masonry

v4 では CSS のみで Masonry 風のカラムの挙動を模倣していましたが、この手法には多くのside effectsがありました。 もしv5でこのようなレイアウトにしたいのであれば、Masonryプラグインを利用してください。MasonryはBootstrapには含まれていませんが、あなたが始めるのに役立つようにdemo exampleを作ってみました。