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112 lines
4.2 KiB
Markdown
Executable File
112 lines
4.2 KiB
Markdown
Executable File
---
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layout: docs
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title: Alerts
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description: Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages.
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group: components
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toc: true
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---
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## Examples
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Alerts are available for any length of text, as well as an optional dismiss button. For proper styling, use one of the four **required** contextual classes (e.g., `.alert-success`). For inline dismissal, use the [alerts jQuery plugin](#dismissing).
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{% example html %}
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{% for color in site.data.theme-colors %}
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<div class="alert alert-{{ color.name }}" role="alert">
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This is a {{ color.name }} alert—check it out!
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</div>{% endfor %}
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{% endexample %}
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{% capture callout-include %}{% include callout-warning-color-assistive-technologies.md %}{% endcapture %}
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{{ callout-include | markdownify }}
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### Link color
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Use the `.alert-link` utility class to quickly provide matching colored links within any alert.
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{% example html %}
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{% for color in site.data.theme-colors %}
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<div class="alert alert-{{ color.name }}" role="alert">
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This is a {{ color.name }} alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like.
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</div>{% endfor %}
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{% endexample %}
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### Additional content
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Alerts can also contain additional HTML elements like headings, paragraphs and dividers.
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{% example html %}
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<div class="alert alert-success" role="alert">
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<h4 class="alert-heading">Well done!</h4>
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<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>
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<hr>
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<p class="mb-0">Whenever you need to, be sure to use margin utilities to keep things nice and tidy.</p>
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</div>
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{% endexample %}
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### Dismissing
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Using the alert JavaScript plugin, it's possible to dismiss any alert inline. Here's how:
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- Be sure you've loaded the alert plugin, or the compiled Bootstrap JavaScript.
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- If you're building our JS from source, it [requires `util.js`]({{ site.baseurl }}/docs/getting-started/javascript/#util). The compiled version includes this.
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- Add a dismiss button and the `.alert-dismissible` class, which adds extra padding to the right of the alert and positions the `.close` button.
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- On the dismiss button, add the `data-dismiss="alert"` attribute, which triggers the JavaScript functionality. Be sure to use the `<button>` element with it for proper behavior across all devices.
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- To animate alerts when dismissing them, be sure to add the `.fade` and `.show` classes.
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You can see this in action with a live demo:
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{% example html %}
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<div class="alert alert-warning alert-dismissible fade show" role="alert">
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<button type="button" class="close" data-dismiss="alert" aria-label="Close">
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<span aria-hidden="true">×</span>
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</button>
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<strong>Holy guacamole!</strong> You should check in on some of those fields below.
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</div>
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{% endexample %}
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## JavaScript behavior
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### Triggers
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Enable dismissal of an alert via JavaScript:
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{% highlight js %}
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$(".alert").alert()
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{% endhighlight %}
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Or with `data` attributes on a button **within the alert**, as demonstrated above:
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{% highlight html %}
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<button type="button" class="close" data-dismiss="alert" aria-label="Close">
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<span aria-hidden="true">×</span>
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</button>
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{% endhighlight %}
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Note that closing an alert will remove it from the DOM.
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### Methods
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| Method | Description |
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| --- | --- |
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| `$().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.) |
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| `$().alert('close')` | Closes an alert by removing it from the DOM. If the `.fade` and `.show` classes are present on the element, the alert will fade out before it is removed. |
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{% highlight js %}$(".alert").alert('close'){% endhighlight %}
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### Events
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Bootstrap's alert plugin exposes a few events for hooking into alert functionality.
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| Event | Description |
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| --- | --- |
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| `close.bs.alert` | This event fires immediately when the <code>close</code> instance method is called. |
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| `closed.bs.alert` | This event is fired when the alert has been closed (will wait for CSS transitions to complete). |
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{% highlight js %}
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$('#myAlert').on('closed.bs.alert', function () {
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// do something…
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})
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{% endhighlight %}
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