Alerts

Alerts(アラート)は,ユーザーのアクションに対してのアラートメッセージを提供しています。

Examples

任意の長さのアラートを表示できます。オプションで閉じるボタンがあります。
8色(e.g., .alert-success ) を利用可能です。インラインで閉じる場合は alerts jQuery plugin を使用します。

A simple primary alert—check it out!

A simple secondary alert—check it out!

A simple success alert—check it out!

A simple danger alert—check it out!

A simple warning alert—check it out!

A simple info alert—check it out!

A simple light alert—check it out!

A simple dark alert—check it out!

<div class="alert alert-primary" role="alert">
  A simple primary alert—check it out!
</div>
<div class="alert alert-secondary" role="alert">
  A simple secondary alert—check it out!
</div>
<div class="alert alert-success" role="alert">
  A simple success alert—check it out!
</div>
<div class="alert alert-danger" role="alert">
  A simple danger alert—check it out!
</div>
<div class="alert alert-warning" role="alert">
  A simple warning alert—check it out!
</div>
<div class="alert alert-info" role="alert">
  A simple info alert—check it out!
</div>
<div class="alert alert-light" role="alert">
  A simple light alert—check it out!
</div>
<div class="alert alert-dark" role="alert">
  A simple dark alert—check it out!
</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.

Link color

.alert-link クラスを適用すると, リンクが適切なカラーになります。

A simple primary alert with an example link. Give it a click if you like.

A simple secondary alert with an example link. Give it a click if you like.

A simple success alert with an example link. Give it a click if you like.

A simple danger alert with an example link. Give it a click if you like.

A simple warning alert with an example link. Give it a click if you like.

A simple info alert with an example link. Give it a click if you like.

A simple light alert with an example link. Give it a click if you like.

A simple dark alert with an example link. Give it a click if you like.

<div class="alert alert-primary" role="alert">
  A simple primary alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-secondary" role="alert">
  A simple secondary alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-success" role="alert">
  A simple success alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-danger" role="alert">
  A simple danger alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-warning" role="alert">
  A simple warning alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-info" role="alert">
  A simple info alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-light" role="alert">
  A simple light alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>
<div class="alert alert-dark" role="alert">
  A simple dark alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
</div>

Additional content

アラートには, 見出し, 段落, 仕切りなどのHTML要素を含めることができます。

Well done!

Aww yeah, you successfully read this important alert message. This example text is going to run a bit longer so that you can see how spacing within an alert works with this kind of content.

Whenever you need to, be sure to use margin utilities to keep things nice and tidy.

<div class="alert alert-success" role="alert">
  <h4 class="alert-heading">Well done!</h4>
  <p>Aww yeah, you successfully read this important alert message. This example text is going to run a bit longer so that you can see how spacing within an alert works with this kind of content.</p>
  <hr>
  <p class="mb-0">Whenever you need to, be sure to use margin utilities to keep things nice and tidy.</p>
</div>

Dismissing

アラートのJavaScript plugin を使用すると, アラートインラインを消すことができます。
方法は

アラートの JavaScript plugin を読み込むか, Bootstrap JavaScriptを読み込んでください。
JavaScriptをソースからビルドする場合は, requires util.js が必要です。コンパイルされたバージョンにはこれが含まれています。
解除ボタンに .alert-dismissible クラスを追加すると警告の右側に追加の余白が追加され, .close ボタンの位置が決まります。
解除ボタンに data-dismiss = "alert" 属性を追加します。これにより, JavaScript機能がトリガーされます。すべてのデバイスで適切な動作をさせるには, 必ず<button>要素を使用してください。
アラートを解除するときにアラートをアニメートするには, 必ず.fadeおよび.showクラスを追加してください。

ライブデモを見ることができます：

Holy guacamole! You should check in on some of those fields below.

<div class="alert alert-warning alert-dismissible fade show" role="alert">
  <strong>Holy guacamole!</strong> You should check in on some of those fields below.
  <button type="button" class="close" data-dismiss="alert" aria-label="Close">
    <span aria-hidden="true">&times;</span>
  </button>
</div>

JavaScript behavior

Triggers

JavaScript経由でアラート閉じるを有効にします。

$('.alert').alert()

上記のように, アラート内のボタンに data 属性を設定することも可能です。

<button type="button" class="close" data-dismiss="alert" aria-label="Close">
  <span aria-hidden="true">&times;</span>
</button>

アラートを閉じると, アラートがDOMから削除されます。

Methods

Method	Description
`$().alert()`	Makes an alert listen for click events on descendant elements which have the `data-dismiss="alert"` attribute. (Not necessary when using the data-api’s auto-initialization.)
`$().alert('close')`	Closes an alert by removing it from the DOM. If the `.fade` and `.show` classes are present on the element, the alert will fade out before it is removed.
`$().alert('dispose')`	Destroys an element’s alert.

$(".alert").alert('close')

Events

Bootstrapのアラートプラグインは, アラート機能のためにいくつかのイベントがあります。

Event	Description
`close.bs.alert`	This event fires immediately when the `close` instance method is called.
`closed.bs.alert`	This event is fired when the alert has been closed (will wait for CSS transitions to complete).

$('#myAlert').on('closed.bs.alert', function () {
  // do something…
})

v4.2