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カード

Cards

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。

項目

概要

カード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。

例

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, 必要に応じて余白調整ユーティリティを使用します。

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。これはサイズ調整オプション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
html 
<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>

コンテンツの種類

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ツをサポートしています。下記は例になります。

本体

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

タイトル・テキスト・リンク

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と.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
html 
<div class="card" style="width: 18rem;">
  <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>

画像

.card-img-topはカードの上部に画像を配置します。.card-textでは、カードにテキストを追加することができる。.card-text内のテキストは標準のHTMLタグでスタイルすることもできます。

PlaceholderImage cap

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

html 
<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>

リストグループ

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

  • An item
  • A second item
  • A third item
html 
<div class="card" style="width: 18rem;">
  <ul class="list-group list-group-flush">
    <li class="list-group-item">An item</li>
    <li class="list-group-item">A second item</li>
    <li class="list-group-item">A third item</li>
  </ul>
</div>
Featured
  • An item
  • A second item
  • A third item
html 
<div class="card" style="width: 18rem;">
  <div class="card-header">
    Featured
  </div>
  <ul class="list-group list-group-flush">
    <li class="list-group-item">An item</li>
    <li class="list-group-item">A second item</li>
    <li class="list-group-item">A third item</li>
  </ul>
</div>
  • An item
  • A second item
  • A third item
Card footer
html 
<div class="card" style="width: 18rem;">
  <ul class="list-group list-group-flush">
    <li class="list-group-item">An item</li>
    <li class="list-group-item">A second item</li>
    <li class="list-group-item">A third item</li>
  </ul>
  <div class="card-footer">
    Card footer
  </div>
</div>

キッチンシンク

複数のコンテンツタイプを組み合わせて、必要なカードを作ることもできますし、すべてを詰め込むこともできます。下図は、イメージスタイル、ブロック、テキストスタイル、リストグループを、固定幅のカードにまとめたものです。

PlaceholderImage cap
Card title

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

  • An item
  • A second item
  • A third item
Card link Another link
html 
<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">An item</li>
    <li class="list-group-item">A second item</li>
    <li class="list-group-item">A third item</li>
  </ul>
  <div class="card-body">
    <a href="#" class="card-link">Card link</a>
    <a href="#" class="card-link">Another link</a>
  </div>
</div>

ヘッダーとフッター

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
html 
<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*>に.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
html 
<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

A well-known quote, contained in a blockquote element.

Someone famous in Source Title
html 
<div class="card">
  <div class="card-header">
    Quote
  </div>
  <div class="card-body">
    <blockquote class="blockquote mb-0">
      <p>A well-known quote, contained in a blockquote element.</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
2 days ago
html 
<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-body-secondary">
    2 days ago
  </div>
</div>

サイズ調整

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 mixin、ユーティリティを使って変更することができます。

グリッドマークアップの使用

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
html 
<div class="row">
  <div class="col-sm-6 mb-3 mb-sm-0">
    <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>

ユーティリティの使用

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
html 
<div class="card w-75 mb-3">
  <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>

カスタムCSSの使用

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
html 
<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>

テキストの位置調整

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
html 
<div class="card mb-3" 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 mb-3" 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-end" 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>

ナビゲーション

Bootstrapの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
html 
<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">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
html 
<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">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>

画像

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。

画像キャップ

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
html 
<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-body-secondary">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-body-secondary">Last updated 3 mins ago</small></p>
  </div>
  <img src="..." class="card-img-bottom" alt="...">
</div>

画像のオーバーレイ

画像をカードの背景にして、カードのテキストをオーバーレイします。画像によって、追加のスタイルやユーティリティが必要な場合と不要な場合があります。

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

html 
<div class="card text-bg-dark">
  <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"><small>Last updated 3 mins ago</small></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。

水平方向

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

html 
<div class="card mb-3" style="max-width: 540px;">
  <div class="row g-0">
    <div class="col-md-4">
      <img src="..." class="img-fluid rounded-start" 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-body-secondary">Last updated 3 mins ago</small></p>
      </div>
    </div>
  </div>
</div>

カードのスタイル

背景、ボーダー、カラーをカスタマイズするためのオプションがあります。

背景とカラー

Added in v5.2.0

私たちの.text-bg-{color}ヘルパーを使って、background-colorと対照的な前景色colorを設定できます。以前は、スタイリングのために.text-{color}と.bg-{color}ユーティリティを選択し手動で組み合わせる必要がありましたが、今でもお好みで使うことができます。

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.

html 
<div class="card text-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-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-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-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 text-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-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 text-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-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>
支援技術に意味を伝える

色を使用して意味を付加することは、視覚的な表示を提供するだけであり、スクリーンリーダーなどの支援技術の利用者には伝わりません。色で示される情報は、コンテンツ自体（例：可視テキスト）から明らかですが、.visually-hiddenクラスで隠された追加テキストなど、別の手段で含まれていることを確認してください。

ボーダー

ボーダーユーティリティを使って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.

html 
<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">
    <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>

ユーティリティの組み合わせ

また、カードのヘッダーとフッターのボーダーを必要に応じて変更したり、.bg-transparentでbackground-colorを削除することも可能です。

Header
Success card title

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

Footer
html 
<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>

カードのレイアウト

カード内のコンテンツのスタイリングに加えて、Bootstrapには、一連のカードをレイアウトするためのいくつかのオプションがあります。今のところ、これらのレイアウトオプションはまだレスポンシブではありません。

カードグループ

カード・グループを使って、カードを幅と高さの等しいカラムを持つ1つのくっついた要素としてレンダリングします。カードグループは積み重ねられた状態から始まり、display: flex;を使用してsmブレイクポイントから始まる均一の寸法でくっついた状態になります。

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

html 
<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-body-secondary">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-body-secondary">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-body-secondary">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.

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
html 
<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-body-secondary">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-body-secondary">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-body-secondary">Last updated 3 mins ago</small>
    </div>
  </div>
</div>

グリッドカード

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.

html 
<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.

html 
<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>

When you need equal height, add .h-100 to the cards. If you want equal heights by default, you can set $card-height: 100% in Sass.

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.

html 
<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.

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
html 
<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-body-secondary">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-body-secondary">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-body-secondary">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副作用がありました。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デモを作ってみました。

CSS

変数

Added in v5.2.0

Bootstrapの進化するCSS変数アプローチの一部として、カードはリアルタイムカスタマイズを強化するために、.cardでローカルCSS変数を使用するようになりました。CSS変数の値はSass経由で設定されるため、Sassによるカスタマイズも引き続きサポートされます。

scss/_card.scss 
--#{$prefix}card-spacer-y: #{$card-spacer-y};
--#{$prefix}card-spacer-x: #{$card-spacer-x};
--#{$prefix}card-title-spacer-y: #{$card-title-spacer-y};
--#{$prefix}card-title-color: #{$card-title-color};
--#{$prefix}card-subtitle-color: #{$card-subtitle-color};
--#{$prefix}card-border-width: #{$card-border-width};
--#{$prefix}card-border-color: #{$card-border-color};
--#{$prefix}card-border-radius: #{$card-border-radius};
--#{$prefix}card-box-shadow: #{$card-box-shadow};
--#{$prefix}card-inner-border-radius: #{$card-inner-border-radius};
--#{$prefix}card-cap-padding-y: #{$card-cap-padding-y};
--#{$prefix}card-cap-padding-x: #{$card-cap-padding-x};
--#{$prefix}card-cap-bg: #{$card-cap-bg};
--#{$prefix}card-cap-color: #{$card-cap-color};
--#{$prefix}card-height: #{$card-height};
--#{$prefix}card-color: #{$card-color};
--#{$prefix}card-bg: #{$card-bg};
--#{$prefix}card-img-overlay-padding: #{$card-img-overlay-padding};
--#{$prefix}card-group-margin: #{$card-group-margin};

Sass変数

scss/_variables.scss 
$card-spacer-y:                     $spacer;
$card-spacer-x:                     $spacer;
$card-title-spacer-y:               $spacer * .5;
$card-title-color:                  null;
$card-subtitle-color:               null;
$card-border-width:                 var(--#{$prefix}border-width);
$card-border-color:                 var(--#{$prefix}border-color-translucent);
$card-border-radius:                var(--#{$prefix}border-radius);
$card-box-shadow:                   null;
$card-inner-border-radius:          subtract($card-border-radius, $card-border-width);
$card-cap-padding-y:                $card-spacer-y * .5;
$card-cap-padding-x:                $card-spacer-x;
$card-cap-bg:                       rgba(var(--#{$prefix}body-color-rgb), .03);
$card-cap-color:                    null;
$card-height:                       null;
$card-color:                        null;
$card-bg:                           var(--#{$prefix}body-bg);
$card-img-overlay-padding:          $spacer;
$card-group-margin:                 $grid-gutter-width * .5;