Bootstrap alerts
Bootstrap alerts give contextual feedback information for common user operations. Component is delivered with a bunch of usable and adjustable alert messages.
Examples
Bootstrap alerts are prepared for any length of the message. For proper styling,
use one of required contextual classes: .alert-primary, .alert-secondary, .alert-success, .alert-danger, .alert-warning, .alert-info, .alert-light, or .alert-dark. For inline dismissal, use the alerts jQuery plugin.
<div class="alert alert-primary" role="alert">
It's primary alert!
</div>
<div class="alert alert-secondary" role="alert">
It's secondary alert!
</div>
<div class="alert alert-success" role="alert">
It's success alert!
</div>
<div class="alert alert-danger" role="alert">
It's danger alert!
</div>
<div class="alert alert-warning" role="alert">
It's warning alert!
</div>
<div class="alert alert-info" role="alert">
It's info alert!
</div>
<div class="alert alert-light" role="alert">
It's light alert!
</div>
<div class="alert alert-dark" role="alert">
It's dark alert!
</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
Use the .alert-link utility class to immediately give matching colored links inside any alert.
<div class="alert alert-primary" role="alert">
A primary alert with <a href="#" class="alert-link">a link</a>. You can click if you would like.
</div>
<div class="alert alert-secondary" role="alert">
A secondary alert with <a href="#" class="alert-link">a link</a>. You can click if you would like.
</div>
<div class="alert alert-success" role="alert">
A success alert with <a href="#" class="alert-link">a link</a>. You can click if you would like.
</div>
<div class="alert alert-danger" role="alert">
A danger alert with <a href="#" class="alert-link">a link</a>. You can click if you would like.
</div>
<div class="alert alert-warning" role="alert">
A warning alert with <a href="#" class="alert-link">a link</a>. You can click if you would like.
</div>
<div class="alert alert-info" role="alert">
A info alert with <a href="#" class="alert-link">a link</a>. You can click if you would like.
</div>
<div class="alert alert-light" role="alert">
A light alert with <a href="#" class="alert-link">a link</a>. You can click if you would like.
</div>
<div class="alert alert-dark" role="alert">
A dark alert with <a href="#" class="alert-link">a link</a>. You can click if you would like.
</div>Additional content
Alerts can also incorporate additional HTML elements like headings, paragraphs, and dividers.
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
Using the JavaScript plugin, it’s possible to remove any alert. Here’s how you can do it:
- Be sure you’ve loaded the bootstrap alert plugin.
- Add a
.alert-dismissibleclass. - Add a dismiss button and set the
data-dismiss="alert"attribute, which triggers the JavaScript functionality. Be sure to use the<button>element.
Here’s a live demo:
<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">×</span>
</button>
</div>JavaScript behavior
Triggers
Enable dismissal of an alert via JavaScript:
$('.alert').alert()Or with data attributes on a button within the alert, as demonstrated above:
<button type="button" class="close" data-dismiss="alert" aria-label="Close">
<span aria-hidden="true">×</span>
</button>Please note that closing a Bootstrap alert will remove it from the DOM.
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’s alert plugin exposes a few events for hooking into alert functionality.
| 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…
})