--- layout: docs title: Alerts description: Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages. group: components aliases: - "/components/" - "/docs/4.6/components/" toc: true --- ## Examples Alerts are available for any length of text, as well as an optional dismiss button. For proper styling, use one of the eight **required** contextual classes (e.g., `.alert-success`). For inline dismissal, use the [alerts jQuery plugin](#dismissing). {{< example >}} {{< alerts.inline >}} {{- range (index $.Site.Data "theme-colors") }} <div class="alert alert-{{ .name }}" role="alert"> A simple {{ .name }} alert—check it out! </div>{{- end -}} {{< /alerts.inline >}} {{< /example >}} {{< callout warning >}} {{< partial "callout-warning-color-assistive-technologies.md" >}} {{< /callout >}} ### Link color Use the `.alert-link` utility class to quickly provide matching colored links within any alert. {{< example >}} {{< alerts.inline >}} {{- range (index $.Site.Data "theme-colors") }} <div class="alert alert-{{ .name }}" role="alert"> A simple {{ .name }} alert with <a href="#" class="alert-link">an example link</a>. Give it a click if you like. </div>{{ end -}} {{< /alerts.inline >}} {{< /example >}} ### Additional content Alerts can also contain additional HTML elements like headings, paragraphs and dividers. {{< example >}} <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> {{< /example >}} ### Dismissing Using the alert JavaScript plugin, it's possible to dismiss any alert inline. Here's how: - Be sure you've loaded the alert plugin, or the compiled Bootstrap JavaScript. - If you're building our JavaScript from source, it [requires `util.js`]({{< docsref "/getting-started/javascript#util" >}}). The compiled version includes this. - Add a dismiss button and the `.alert-dismissible` class, which adds extra padding to the right of the alert and positions the `.close` button. - 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. - To animate alerts when dismissing them, be sure to add the `.fade` and `.show` classes. You can see this in action with a live demo: {{< example >}} <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> {{< /example >}} ## JavaScript behavior ### Triggers Enable dismissal of an alert via JavaScript: ```js $('.alert').alert() ``` Or with `data` attributes on a button **within the alert**, as demonstrated above: ```html <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button> ``` Note that closing an alert will remove it from the DOM. ### Methods | Method | Description | | --- | --- | | `$().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. | ```js $('.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). | ```js $('#myAlert').on('closed.bs.alert', function () { // do something... }) ```
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