Media object

メディアオブジェクトはブログのコメントやツイート,ライクなど繰り返しの多いコンポーネントを構築する際のドキュメントです。メディアオブジェクトの使い方の例を示します。

Example

media object はコンテンツが並んで配置され、複雑で反復的なコンポーネントを構築することができます。flexboxによって2つの必須クラスでこれを行います。

下記は単一のメディアオブジェクトの例です。必要なクラスは .media.media-body の2つだけです。 padding や margin は、spacing utilities を使って制御できます。

Placeholder64x64
Media heading
Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
<div class="media">
  <svg class="bd-placeholder-img mr-3" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
  <div class="media-body">
    <h5 class="mt-0">Media heading</h5>
    Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
  </div>
</div>
Flexbug #12: Inline elements aren’t treated as flex items

Internet Explorer 10-11 do not render inline elements like links or images (or ::before and ::after pseudo-elements) as flex items. The only workaround is to set a non-inline display value (e.g., block, inline-block, or flex). We suggest using .d-flex, one of our display utilities, as an easy fix.

Source: Flexbugs on GitHub

Nesting

メディアオブジェクトは無限にネストできますが, ある時点で停止することをお勧めします。 親メディアオブジェクトの .media 中に入れ子にして .media-body を使用します。

Placeholder64x64
Media heading
Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
Placeholder64x64
Media heading
Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
<div class="media">
  <svg class="bd-placeholder-img mr-3" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
  <div class="media-body">
    <h5 class="mt-0">Media heading</h5>
    Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

    <div class="media mt-3">
      <a class="mr-3" href="#">
        <svg class="bd-placeholder-img" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
      </a>
      <div class="media-body">
        <h5 class="mt-0">Media heading</h5>
        Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
      </div>
    </div>
  </div>
</div>

Alignment

メディアオブジェクト内のメディアは, flexboxユーティリティを使用して .media-body コンテンツの先頭(デフォルト),中央,末尾に配置できます。

Placeholder64x64
Top-aligned media

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.

<div class="media">
  <svg class="bd-placeholder-img align-self-start mr-3" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
  <div class="media-body">
    <h5 class="mt-0">Top-aligned media</h5>
    <p>Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.</p>
    <p>Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p>
  </div>
</div>
Placeholder64x64
Center-aligned media

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.

<div class="media">
  <svg class="bd-placeholder-img align-self-center mr-3" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
  <div class="media-body">
    <h5 class="mt-0">Center-aligned media</h5>
    <p>Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.</p>
    <p class="mb-0">Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p>
  </div>
</div>
Placeholder64x64
Bottom-aligned media

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.

<div class="media">
  <svg class="bd-placeholder-img align-self-end mr-3" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
  <div class="media-body">
    <h5 class="mt-0">Bottom-aligned media</h5>
    <p>Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.</p>
    <p class="mb-0">Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p>
  </div>
</div>

Order

メディアオブジェクトのコンテンツの順序を変更します。 HTML自体を変更するか, Flexbox CSSを追加して order プロパティを(選択した整数に)設定します。

Media object
Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
Placeholder64x64
<div class="media">
  <div class="media-body">
    <h5 class="mt-0 mb-1">Media object</h5>
    Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
  </div>
  <svg class="bd-placeholder-img ml-3" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
</div>

Media list

メディアオブジェクトには構造上の要件がほとんどありません。 リスト( <li> )にこれらのクラスを使用することもできます。 <ul><ol>.list-unstyled を追加して, ブラウザのデフォルトリストスタイルを削除して, <li>.media を使用します。微調整には間隔ユーティリティを使用してください。

  • Placeholder64x64
    List-based media object
    Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
  • Placeholder64x64
    List-based media object
    Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
  • Placeholder64x64
    List-based media object
    Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
<ul class="list-unstyled">
  <li class="media">
    <svg class="bd-placeholder-img mr-3" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
    <div class="media-body">
      <h5 class="mt-0 mb-1">List-based media object</h5>
      Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
    </div>
  </li>
  <li class="media my-4">
    <svg class="bd-placeholder-img mr-3" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
    <div class="media-body">
      <h5 class="mt-0 mb-1">List-based media object</h5>
      Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
    </div>
  </li>
  <li class="media">
    <svg class="bd-placeholder-img mr-3" width="64" height="64" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 64x64"><title>Placeholder</title><rect width="100%" height="100%" fill="#868e96"/><text x="50%" y="50%" fill="#dee2e6" dy=".3em">64x64</text></svg>
    <div class="media-body">
      <h5 class="mt-0 mb-1">List-based media object</h5>
      Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.
    </div>
  </li>
</ul>

v4.3