Skip to content

Alert API

API reference docs for the React Alert component. Learn about the props, CSS, and other APIs of this exported module.

Component demos

Import

import Alert from '@mui/joy/Alert';
// or
import { Alert } from '@mui/joy';
Learn about the difference by reading this guide on minimizing bundle size.

Props

Props of the native component are also available.

NameTypeDefaultDescription
color'danger'
| 'neutral'
| 'primary'
| 'success'
| 'warning'
| string
'neutral'

The color of the component. It supports those theme colors that make sense for this component.

To learn how to add your own colors, check out Themed components—Extend colors.

componentelementType

The component used for the root node. Either a string to use a HTML element or a component.

endDecoratornode

Element placed after the children.

invertedColorsboolfalse

If true, the children with an implicit color prop invert their colors to match the component's variant and color.

rolestring'alert'

The ARIA role attribute of the element.

size'sm'
| 'md'
| 'lg'
| string
'md'

The size of the component.

To learn how to add custom sizes to the component, check out Themed components—Extend sizes.

slotProps{ endDecorator?: func
| object, root?: func
| object, startDecorator?: func
| object }
{}

The props used for each slot inside.

slots{ endDecorator?: elementType, root?: elementType, startDecorator?: elementType }{}

The components used for each slot inside.

See Slots API below for more details.

startDecoratornode

Element placed before the children.

sxArray<func
| object
| bool>
| func
| object

The system prop that allows defining system overrides as well as additional CSS styles.

See the `sx` page for more details.

variant'outlined'
| 'plain'
| 'soft'
| 'solid'
| string
'soft'

The global variant to use.

To learn how to add your own variants, check out Themed components—Extend variants.

The ref is forwarded to the root element.

Theme default props

You can use JoyAlert to change the default props of this component with the theme.


Slots

To learn how to customize the slot, check out the Overriding component structure guide.

Slot nameClass nameDefault componentDescription
root.MuiAlert-root'div'The component that renders the root.
startDecorator.MuiAlert-startDecorator'span'The component that renders the start decorator.
endDecorator.MuiAlert-endDecorator'span'The component that renders the end decorator.

CSS classes

These class names are useful for styling with CSS. They are applied to the component's slots when specific states are triggered.

Class nameRule nameDescription
.MuiAlert-colorContextcolorContextClass name applied to the root element when color inversion is triggered.
.MuiAlert-colorDangercolorDangerClass name applied to the root element if color="danger".
.MuiAlert-colorNeutralcolorNeutralClass name applied to the root element if color="neutral".
.MuiAlert-colorPrimarycolorPrimaryClass name applied to the root element if color="primary".
.MuiAlert-colorSuccesscolorSuccessClass name applied to the root element if color="success".
.MuiAlert-colorWarningcolorWarningClass name applied to the root element if color="warning".
.MuiAlert-sizeLgsizeLgClass name applied to the root element if size="lg".
.MuiAlert-sizeMdsizeMdClass name applied to the root element if size="md".
.MuiAlert-sizeSmsizeSmClass name applied to the root element if size="sm".
.MuiAlert-variantOutlinedvariantOutlinedClass name applied to the root element if variant="outlined".
.MuiAlert-variantPlainvariantPlainClass name applied to the root element if variant="plain".
.MuiAlert-variantSoftvariantSoftClass name applied to the root element if variant="soft".
.MuiAlert-variantSolidvariantSolidClass name applied to the root element if variant="solid".

You can override the style of the component using one of these customization options: