Alert API

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

Demos

For examples and details on the usage of this React component, visit the component demo pages:

import Alert from '@mui/joy/Alert';
// or
import { Alert } from '@mui/joy';

Props of the native component are also available.

Name	Type	Default	Description
color	'danger' \| 'info' \| 'neutral' \| 'primary' \| 'success' \| 'warning' \| string	'primary'	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.
endDecorator	node		Element placed after the children.
role	string	'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.
startDecorator	node		Element placed before the children.
sx	Array<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.

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

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

Name	Default class	Default HTML tag	Description
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.

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

With a global class name.
With a rule name as part of the component's styleOverrides property in a custom theme.