ExpansionPanel API

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

Import

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

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

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

Name	Type	Default	Description
children*	node		The content of the expansion panel.
classes	object		Override or extend the styles applied to the component. See CSS API below for more details.
defaultExpanded	bool	false	If `true`, expands the panel by default.
disabled	bool	false	If `true`, the panel will be displayed in a disabled state.
expanded	bool		If `true`, expands the panel, otherwise collapse it. Setting this prop enables control over the panel.
onChange	func		Callback fired when the expand/collapse state is changed. Signature: `function(event: object, expanded: boolean) => void` event: The event source of the callback. expanded: The `expanded` state of the panel.
square	bool	false	If `true`, rounded corners are disabled.
TransitionComponent	elementType	Collapse	The component used for the collapse effect. Follow this guide to learn more about the requirements for this component.
TransitionProps	object		Props applied to the `Transition` element.

The ref is forwarded to the root element.

Any other props supplied will be provided to the root element (Paper).

Rule name	Global class	Description
root	.MuiExpansionPanel-root	Styles applied to the root element.
rounded	.MuiExpansionPanel-rounded	Styles applied to the root element if `square={false}`.
expanded	.Mui-expanded	Styles applied to the root element if `expanded={true}`.
disabled	.Mui-disabled	Styles applied to the root element if `disabled={true}`.

You can override the style of the component thanks to one of these customization points:

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

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