グレーの枠（廃止）
well
グレーの囲み枠を表示してくれるクラスでしたが、Bootstrap4ではなくなりました。
パネル（廃止）
panel panel-default
パネルクラスもBootstrap4ではなくなりました。
カード
bootstrap4では.well .panel .thumbnailクラスはなくなり、.cardクラスに統一されました。
card
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" style="width: 20rem;">
<img class="card-img-top" src="..." alt="Card image cap">
<div class="card-body">
<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>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>card-body
.card-body を利用することで以前のpanelのように利用できます。
<div class="card">
<div class="card-body">
テキストサンプル
</div>
</div>card-title card-subtitle card-text card-link
タイトル、サブタイトル、テキスト、リンクを表示することができます。
Card title
Card subtitle
Some quick example text to build on the card title and make up the bulk of the card’s content.
<div class="card" style="width: 20rem;">
<div class="card-body">
<h4 class="card-title">Card title</h4>
<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>card-header card-footer
ヘッダー、フッターに.card-header .card-footerクラスで表示することができます。
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: 20rem;">
<div class="card-header">
Header
</div>
<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 class="card-footer">
Footer
</div>
</div>画像
card-img-top
.card-img-topで画像を上部に表示できます。
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: 20rem;">
<img class="card-img-top" src="..." alt="Card image cap">
<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>card-img-bottom
.card-img-bottomで画像を下部に表示できます。
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: 20rem;">
<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>
<img class="card-img-bottom" src="..." alt="Card image cap">
</div>card-img card-img-overlay
.card-img-overlayで画像の上にテキストを重ねることができます。
<div class="card">
<img class="card-img" src="..." alt="Card image">
<div class="card-img-overlay">
<h4 class="card-title">Card title</h4>
<p class="card-text">画像の上にテキストを重ねることができます。</p>
</div>
</div>背景色の変更
.bg-primaryなどを利用することで背景色の変更も可能です。
Primary card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Secondary card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Success card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Danger card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Warning card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Info card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Light card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
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: 20rem;">
<div class="card-header">Header</div>
<div class="card-body">
<h4 class="card-title">Primary 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>
</div>
<div class="card text-white bg-secondary mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body">
<h4 class="card-title">Secondary 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>
</div>
<div class="card text-white bg-success mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body">
<h4 class="card-title">Success 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>
</div>
<div class="card text-white bg-danger mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body">
<h4 class="card-title">Danger 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>
</div>
<div class="card text-white bg-warning mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body">
<h4 class="card-title">Warning 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>
</div>
<div class="card text-white bg-info mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body">
<h4 class="card-title">Info 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>
</div>
<div class="card bg-light mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body">
<h4 class="card-title">Light 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>
</div>
<div class="card text-white bg-dark mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body">
<h4 class="card-title">Dark 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>
</div>枠線、テキスト色変更
.border-primaryや.text-primaryなどを利用することで枠線の色やテキストの色変更も可能です。
Primary card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Secondary card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Success card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Danger card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Warning card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Info card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
Light card title
Some quick example text to build on the card title and make up the bulk of the card’s content.
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: 20rem;">
<div class="card-header">Header</div>
<div class="card-body text-primary">
<h4 class="card-title">Primary 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>
</div>
<div class="card border-secondary mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body text-secondary">
<h4 class="card-title">Secondary 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>
</div>
<div class="card border-success mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body text-success">
<h4 class="card-title">Success 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>
</div>
<div class="card border-danger mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body text-danger">
<h4 class="card-title">Danger 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>
</div>
<div class="card border-warning mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body text-warning">
<h4 class="card-title">Warning 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>
</div>
<div class="card border-info mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body text-info">
<h4 class="card-title">Info 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>
</div>
<div class="card border-light mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body">
<h4 class="card-title">Light 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>
</div>
<div class="card border-dark mb-3" style="max-width: 20rem;">
<div class="card-header">Header</div>
<div class="card-body text-dark">
<h4 class="card-title">Dark 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>
</div>レイアウト
card-group
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 card has supporting text below as a natural lead-in to additional content.
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 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 class="card-img-top" src="..." alt="Card image cap">
<div class="card-body">
<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">
<img class="card-img-top" src="..." alt="Card image cap">
<div class="card-body">
<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">
<img class="card-img-top" src="..." alt="Card image cap">
<div class="card-body">
<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-deck
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.
Last updated 3 mins ago
Card title
This card has supporting text below as a natural lead-in to additional content.
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 card has even longer content than the first to show that equal height action.
Last updated 3 mins ago
<div class="card-deck">
<div class="card">
<img class="card-img-top" src="..." alt="Card image cap">
<div class="card-body">
<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">
<img class="card-img-top" src="..." alt="Card image cap">
<div class="card-body">
<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">
<img class="card-img-top" src="..." alt="Card image cap">
<div class="card-body">
<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
Card title 1
text Sample text Sample text Sample text Sample
Card 2 text Sample text Sample text Sample text Sample
Card title 3
text Sample text Sample text Sample text Sample
Last updated 3 mins ago
Card 4 text Sample text Sample text Sample text Sample
Card title 5
text Sample text Sample text Sample text Sample
Last updated 3 mins ago
Card 6 text Sample text Sample text Sample text Sample
Card title 7
text Sample text Sample text Sample text Sample
Last updated 3 mins ago
<div class="card-columns">
<div class="card">
<img class="card-img-top" src="..." alt="Card image cap">
<div class="card-body">
<h4 class="card-title">Card title 1</h4>
<p class="card-text">text Sample text Sample text Sample text Sample</p>
</div>
</div>
<div class="card p-3">
<blockquote class="blockquote mb-0 card-body">
<p>Card 2 text Sample text Sample text Sample text Sample</p>
<footer class="blockquote-footer">
<small class="text-muted">
Someone famous in <cite title="Source Title">Source Title</cite>
</small>
</footer>
</blockquote>
</div>
<div class="card">
<img class="card-img-top" src="..." alt="Card image cap">
<div class="card-body">
<h4 class="card-title">Card title 3</h4>
<p class="card-text">text Sample text Sample text Sample text Sample</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card bg-primary text-white text-center p-3">
<blockquote class="blockquote mb-0">
<p>Card 4 text Sample text Sample text Sample text Sample</p>
<footer class="blockquote-footer">
<small>
Someone famous in <cite title="Source Title">Source Title</cite>
</small>
</footer>
</blockquote>
</div>
<div class="card text-center">
<div class="card-body">
<h4 class="card-title">Card title 5</h4>
<p class="card-text">text Sample text Sample text Sample text Sample</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card">
<img class="card-img" src="..." alt="Card image">
</div>
<div class="card p-3 text-right">
<blockquote class="blockquote mb-0">
<p>Card 6 text Sample text Sample text Sample text Sample</p>
<footer class="blockquote-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-body">
<h4 class="card-title">Card title 7</h4>
<p class="card-text">text Sample text Sample text Sample text Sample</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>
