--- layout: docs title: Alerts description: Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages. group: components toc: true --- ## Examples Alerts are available for any length of text, as well as an optional close button. For proper styling, use one of the eight **required** contextual classes (e.g., `.alert-success`). For inline dismissal, use the [alerts JavaScript plugin](#dismissing). {{< example >}} {{< alerts.inline >}} {{- range (index $.Site.Data "theme-colors") }}

A simple {{ .name }} alert—check it out!

{{- end -}} {{< /alerts.inline >}} {{< /example >}} {{< callout info >}} {{< 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") }}

A simple {{ .name }} alert with an example link. Give it a click if you like.

{{ end -}} {{< /alerts.inline >}} {{< /example >}} ### Additional content Alerts can also contain additional HTML elements like headings, paragraphs and dividers. {{< example >}}

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.

{{< /example >}} ### Icons Similarly, you can use [flexbox utilities]({{< docsref "/utilities/flex" >}}) and [Bootstrap Icons]({{< param icons >}}) to create alerts with icons. Depending on your icons and content, you may want to add more utilities or custom styles. {{< example >}}

An example alert with an icon

{{< /example >}} Need more than one icon for your alerts? Consider using more Bootstrap Icons and making a local SVG sprite like so to easily reference the same icons repeatedly. {{< example >}}

An example alert with an icon

An example success alert with an icon

An example warning alert with an icon

An example danger alert with an icon

{{< /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. - Add a [close button]({{< docsref "/components/close-button" >}}) and the `.alert-dismissible` class, which adds extra padding to the right of the alert and positions the close button. - On the close button, add the `data-bs-dismiss="alert"` attribute, which triggers the JavaScript functionality. Be sure to use the ` {{< /example >}} {{< callout warning >}} When an alert is dismissed, the element is completely removed from the page structure. If a keyboard user dismisses the alert using the close button, their focus will suddenly be lost and, depending on the browser, reset to the start of the page/document. For this reason, we recommend including additional JavaScript that listens for the `closed.bs.alert` event and programmatically sets `focus()` to the most appropriate location in the page. If you're planning to move focus to a non-interactive element that normally does not receive focus, make sure to add `tabindex="-1"` to the element. {{< /callout >}} ## Sass ### Variables {{< scss-docs name="alert-variables" file="scss/_variables.scss" >}} ### Variant mixin Used in combination with `$theme-colors` to create contextual modifier classes for our alerts. {{< scss-docs name="alert-variant-mixin" file="scss/mixins/_alert.scss" >}} ### Loop Loop that generates the modifier classes with the `alert-variant()` mixin. {{< scss-docs name="alert-modifiers" file="scss/_alert.scss" >}} ## JavaScript behavior ### Triggers Enable dismissal of an alert via JavaScript: ```js var alertList = document.querySelectorAll('.alert') alertList.forEach(function (alert) { new bootstrap.Alert(alert) }) ``` Or with `data` attributes on a button **within the alert**, as demonstrated above: ```html ``` Note that closing an alert will remove it from the DOM. ### Methods You can create an alert instance with the alert constructor, for example: ```js var myAlert = document.getElementById('myAlert') var bsAlert = new bootstrap.Alert(myAlert) ``` This makes an alert listen for click events on descendant elements which have the `data-bs-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. (Removes stored data on the DOM element)
`getInstance`	Static method which allows you to get the alert instance associated to a DOM element, you can use it like this: `bootstrap.Alert.getInstance(alert)`
`getOrCreateInstance`	Static method which returns an alert instance associated to a DOM element or create a new one in case it wasn't initialised. You can use it like this: `bootstrap.Alert.getOrCreateInstance(element)`

```js var alertNode = document.querySelector('.alert') var alert = bootstrap.Alert.getInstance(alertNode) alert.close() ``` ### Events Bootstrap's alert plugin exposes a few events for hooking into alert functionality.

Event	Description
`close.bs.alert`	Fires immediately when the `close` instance method is called.
`closed.bs.alert`	Fired when the alert has been closed and CSS transitions have completed.

```js var myAlert = document.getElementById('myAlert') myAlert.addEventListener('closed.bs.alert', function () { // do something, for instance, explicitly move focus to the most appropriate element, // so it doesn't get lost/reset to the start of the page // document.getElementById('...').focus() }) ```