Alert API

The API documentation of the Alert React component. Learn more about the props and the CSS customization points.

Import

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

You can learn more about the difference by reading this guide.

Component name

The MuiAlert name can be used for providing default props or style overrides at the theme level.

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.
variant	'filled' | 'outlined' | 'standard'	'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).

CSS

Rule name	Global class	Description
root	.MuiAlert-root	Styles applied to the root element.
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 thanks to one of these customization points:

• With a rule name of the classes object prop.
• With a global class name.
• With a theme and an overrides property.

If that's not sufficient, you can check the implementation of the component for more detail.

Inheritance

The props of the Paper component are also available. You can take advantage of this behavior to target nested components.

Demos

• Alert