Accordion API

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

Import

import Accordion from '@mui/material/Accordion';
// or
import { Accordion } from '@mui/material';

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

Component name

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

Props

Props of the Paper component are also available.

Name	Type	Default	Description
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.
defaultExpanded	bool	false	If `true`, expands the accordion by default.
disabled	bool	false	If `true`, the component is disabled.
disableGutters	bool	false	If `true`, it removes the margin between two expanded accordion items and the increase of height.
expanded	bool	false	If `true`, expands the accordion, otherwise collapse it. Setting this prop enables control over the accordion.
onChange	func		Callback fired when the expand/collapse state is changed. Signature: `function(event: React.SyntheticEvent, expanded: boolean) => void` event: The event source of the callback. Warning: This is a generic event not a change event. expanded: The `expanded` state of the accordion.
square	bool	false	If `true`, rounded corners are disabled.
sx	func \| object		The system prop that allows defining system overrides as well as additional CSS styles. See the `sx` page for more details.
TransitionComponent	elementType	Collapse	The component used for the transition. Follow this guide to learn more about the requirements for this component.
TransitionProps	object		Props applied to the transition element. By default, the element is based on this `Transition` component.

The ref is forwarded to the root element.

Inheritance

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

CSS

Rule name	Global class	Description
root	.MuiAccordion-root	Styles applied to the root element.
rounded	.MuiAccordion-rounded	Styles applied to the root element unless `square={true}`.
expanded	.Mui-expanded	State class applied to the root element if `expanded={true}`.
disabled	.Mui-disabled	State class applied to the root element if `disabled={true}`.
gutters	.MuiAccordion-gutters	Styles applied to the root element unless `disableGutters={true}`.
region	.MuiAccordion-region	Styles applied to the region element, the container of the children.

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

Accordion