Accordion API

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

Component demos

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

Accordion

Import

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

Learn about the difference by reading this guide on minimizing bundle size.

Props

Props of the Paper component are also available.

childrenRequired

The content of the component.

Type:node

classes

Override or extend the styles applied to the component.

See CSS API below for more details.

Type:object

defaultExpanded

If true, expands the accordion by default.

Type:bool

Default:false

disabled

If true, the component is disabled.

Type:bool

Default:false

disableGutters

If true, it removes the margin between two expanded accordion items and the increase of height.

Type:bool

Default:false

expanded

If true, expands the accordion, otherwise collapse it. Setting this prop enables control over the accordion.

Type:bool

onChange

Callback fired when the expand/collapse state is changed.

Type:func

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

If true, rounded corners are disabled.

Type:bool

Default:false

The system prop that allows defining system overrides as well as additional CSS styles.

See the `sx` page for more details.

Type:Array<func | object | bool> | func | object

TransitionComponent

The component used for the transition. Follow this guide to learn more about the requirements for this component.

Type:elementType

Default:Collapse

TransitionProps

Props applied to the transition element. By default, the element is based on this Transition component.

Type:object

The ref is forwarded to the root element.

Inheritance

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

Theme default props

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

CSS classes

These class names are useful for styling with CSS. They are applied to the component's slots when specific states are triggered.

.Mui-disabledSTATE

State class applied to the root element if disabled={true}.

.Mui-expandedSTATE

State class applied to the root element if expanded={true}.

.MuiAccordion-gutters

Styles applied to the root element unless disableGutters={true}.

Rule name:gutters

.MuiAccordion-region

Styles applied to the region element, the container of the children.

Rule name:region

.MuiAccordion-root

Styles applied to the root element.

Rule name:root

.MuiAccordion-rounded

Styles applied to the root element unless square={true}.

Rule name:rounded

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.