Alert

Bootstrap's alert component built with Svelte 5. Use alerts to provide contextual feedback messages for typical user actions.

Playground

Experiment with the Alert component by adjusting the props below:

Interactive Playground

Controls

Text

Color Variant

Dismissible

Animated

Track Events

Preview

This is an alert

Code

            
            <Alert
  isDismissible={true}>
  This is an alert
</Alert>

Event Log

No events logged

Basic Example

A simple primary alert—check it out!

            
            <Alert colorVariant="primary">
  A simple primary alert—check it out!
</Alert>

Alert Variants

Bootstrap includes several predefined alert styles for different contexts.

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!

            
            <Alert colorVariant="primary">A simple primary alert—check it out!</Alert>
<Alert colorVariant="secondary">A simple secondary alert—check it out!</Alert>
<Alert colorVariant="success">A simple success alert—check it out!</Alert>
<Alert colorVariant="danger">A simple danger alert—check it out!</Alert>
<Alert colorVariant="warning">A simple warning alert—check it out!</Alert>
<Alert colorVariant="info">A simple info alert—check it out!</Alert>
<Alert colorVariant="light">A simple light alert—check it out!</Alert>
<Alert colorVariant="dark">A simple dark alert—check it out!</Alert>

Dismissible Alerts

Make alerts dismissible by adding the isDismissible prop. This adds a close button to the alert and allows it to be closed by users.

Holy guacamole! You should check in on some of those fields below.

            
            <Alert colorVariant="warning" isDismissible={true}>
  <strong>Holy guacamole!</strong> You should check in on some of those fields below.
</Alert>

Additional Content

Alerts can contain 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.

            
            <Alert colorVariant="success">
  <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>
</Alert>

Icons

Add icons to your alerts to enhance visual appearance. You can use any icon library like Bootstrap Icons.

An example alert with an icon

            
            <Alert colorVariant="primary">
  <i class="bi bi-info-circle-fill me-2"></i>
  An example alert with an icon
</Alert>

API Reference

Props

Name	Type	Default	Description
`colorVariant`	`string`	`'primary'`	Sets the alert's background color. Values: 'primary', 'secondary', 'success', 'danger', 'warning', 'info', 'light', 'dark'.
`isDismissible`	`boolean`	`false`	Adds a close button that allows users to dismiss the alert.
`isAnimated`	`boolean`	`true`	Enables the fade animation when the alert is shown or hidden.
`isOpen`	`boolean`	`true`	Controls the visibility of the alert. Can be bound using `bind:isOpen`.
`elementRef`	`HTMLElement \| null`	`null`	Reference to the DOM element

Events

Name	Type	Description
`onClose`	`EventListener`	Fired when the alert is about to Close (at the start of the transition).
`onClosed`	`EventListener`	Fired when the alert has been fully Closed (after the transition is complete).

CSS Classes

The component applies Bootstrap's alert classes based on the provided props:

alert - Always applied as the base class
{variant} - Applied based on the variant prop
alert-dismissible - Applied when isDismissible is true
fade - Applied when isAnimated is true
show - Applied when isOpen is true and isAnimated is true