The new version of CoreUI is available. Please check the latest version.

Bootstrap alerts

Bootstrap alerts give contextual feedback information for common user operations. Component is delivered with a bunch of usable and adjustable alert messages.

On this page:

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, .alert-dark. For inline dismissal, use the alerts JavaScript plugin.

Bootstrap alerts are prepared for any length of text, as well as an optional close button. For a styling, use one of the required contextual classes (e.g., .alert-success). For inline dismissal, use the alerts JavaScript plugin.

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

Use the .alert-link utility class to immediately give matching colored links inside any alert.

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

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 or the compiled CoreUI JavaScript.
If you’re compiling our JavaScript from source, it requires util.js. The compiled version includes this.
Add a close button and the .alert-dismissible class, which adds some extra padding to the right of the alert component and positions the .close button.
On the close button, add the data-dismiss="alert" attribute, which triggers the JavaScript functionality. You have to use the <button> element with it for proper behavior across all devices.
To animate alerts when dismissing them, you have to add the .fade and .show classes.

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

Enable dismissal of an alert via JavaScript:

var alertList = document.querySelectorAll('.alert')
alertList.forEach(function (alert) {
  new coreui.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">&times;</span>
</button>

Note that closing an alert will remove it from the DOM.

Methods

You can create an alert instance with the alert constructor, for example:

var myAlert = document.getElementById('myAlert')
var bsAlert = new coreui.Alert(myAlert)

This 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.)

Method	Description
`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.
`dispose`	Destroys an element’s alert.
`_getInstance`	Static method which allows you to get the alert instance associated to a DOM element, you can use it like this: `coreui.Alert._getInstance(alert)`

var alertNode = document.querySelector('.alert')
var alert = coreui.Alert._getInstance(alertNode)
alert.close()

Events

Bootstrap’s alert plugin exposes a few events for hooking into alert functionality.

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

var myAlert = document.getElementById('myAlert')
myAlert.addEventListener('closed.coreui.alert', function () {
  // do something…
})

jQuery behavior