Alert API

API documentation for the React Alert component. Learn about the available props, and the CSS API.

Import

import Alert from '@material-ui/core/Alert';
// or
import { Alert } from '@material-ui/core';

You can learn about the difference by reading this guide on minimizing bundle size.

Component name

The name MuiAlert can be used when providing default props or style overrides in the theme.

Props

Name	Type	Default	Description
action	node		The action to display. It renders after the message, at the end of the alert.
children	node		The content of the component.
classes	object		Override or extend the styles applied to the component. See CSS API below for more details.
closeText	string	'Close'	Override the default label for the close popup icon button. For localization purposes, you can use the provided translations.
color	'error' \| 'info' \| 'success' \| 'warning'		The main color for the alert. Unless provided, the value is taken from the `severity` prop.
icon	node		Override the icon displayed before the children. Unless provided, the icon is mapped to the value of the `severity` prop.
iconMapping	{ error?: node, info?: node, success?: node, warning?: node }		The component maps the `severity` prop to a range of different icons, for instance success to `<SuccessOutlined>`. If you wish to change this mapping, you can provide your own. Alternatively, you can use the `icon` prop to override the icon displayed.
onClose	func		Callback fired when the component requests to be closed. When provided and no `action` prop is set, a close icon button is displayed that triggers the callback when clicked. Signature: `function(event: object) => void` event: The event source of the callback.
role	string	'alert'	The ARIA role attribute of the element.
severity	'error' \| 'info' \| 'success' \| 'warning'	'success'	The severity of the alert. This defines the color and icon used.
sx	object		The system prop that allows defining system overrides as well as additional CSS styles. See the `sx` page for more details.
variant	'filled' \| 'outlined' \| 'standard' \| string	'standard'	The variant to use.

The ref is forwarded to the root element.
Any other props supplied will be provided to the root element (Paper).

Inheritance

While not explicitly documented above, the props of the Paper component are also available on Alert. You can take advantage of this to target nested components.

CSS

Rule name	Global class	Description
root	.MuiAlert-root	Styles applied to the root element.
filled	.MuiAlert-filled	Styles applied to the root element if `variant="filled"`.
outlined	.MuiAlert-outlined	Styles applied to the root element if `variant="outlined"`.
standard	.MuiAlert-standard	Styles applied to the root element if `variant="standard"`.
standardSuccess	.MuiAlert-standardSuccess	Styles applied to the root element if `variant="standard"` and `color="success"`.
standardInfo	.MuiAlert-standardInfo	Styles applied to the root element if `variant="standard"` and `color="info"`.
standardWarning	.MuiAlert-standardWarning	Styles applied to the root element if `variant="standard"` and `color="warning"`.
standardError	.MuiAlert-standardError	Styles applied to the root element if `variant="standard"` and `color="error"`.
outlinedSuccess	.MuiAlert-outlinedSuccess	Styles applied to the root element if `variant="outlined"` and `color="success"`.
outlinedInfo	.MuiAlert-outlinedInfo	Styles applied to the root element if `variant="outlined"` and `color="info"`.
outlinedWarning	.MuiAlert-outlinedWarning	Styles applied to the root element if `variant="outlined"` and `color="warning"`.
outlinedError	.MuiAlert-outlinedError	Styles applied to the root element if `variant="outlined"` and `color="error"`.
filledSuccess	.MuiAlert-filledSuccess	Styles applied to the root element if `variant="filled"` and `color="success"`.
filledInfo	.MuiAlert-filledInfo	Styles applied to the root element if `variant="filled"` and `color="info"`.
filledWarning	.MuiAlert-filledWarning	Styles applied to the root element if `variant="filled"` and `color="warning"`.
filledError	.MuiAlert-filledError	Styles applied to the root element if `variant="filled"` and `color="error"`.
icon	.MuiAlert-icon	Styles applied to the icon wrapper element.
message	.MuiAlert-message	Styles applied to the message wrapper element.
action	.MuiAlert-action	Styles applied to the action wrapper element if `action` is provided.

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.

Demos

Alert