Accordion

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This guide covers Material UI Core with the default Emotion engine; extensions and additional demos are explicitly classified.

Use case and business boundary

Expansion is local UI state, not data loading; keep headings and aria relationships intact.

Native composition and scope

Accordion, AccordionActions, AccordionDetails, AccordionSummary

Preserve native Material UI composition and types; do not substitute JGuang UI/Base UI/Radix APIs. Example entries are not extra components.

Native installation and initialization

npm install @mui/material@9.4.0 @emotion/react@11.14.0 @emotion/styled@11.14.1

Use native npm and Emotion, not an invented JGuang UI Registry URL. Place examples inside native ThemeProvider; choose CssBaseline or ScopedCssBaseline for the project. Inspect React, existing providers, lockfile and SSR first. Never overwrite files or conceal peer conflicts. This batch verified React 19.2.8; React 18 and below require matching react-is. See the included bilingual setup guide.

Practical native parameters

These selected parameters are not a flattened universal API. Preserve the native declaring owner, slot structure, nullable values and generics.

Runnable native examples

Machine keys select example entries, not universal variant props. Native demo JSX/data stay unchanged; JGuang-authored acceptance fixtures are explicitly labelled.

• Introduction · AccordionUsage · upstream native demo
• Expand icon · AccordionExpandIcon · upstream native demo
• Expanded by default · AccordionExpandDefault · upstream native demo
• Transition · AccordionTransition · upstream native demo
• Disabled item · DisabledAccordion · upstream native demo
• Controlled Accordion · ControlledAccordions · upstream native demo
• Only one expanded at a time · CustomizedAccordions · upstream native demo

Actual usage example

Unmodified pinned native demo; copy its required local helper files together.

import * as React from 'react';
import Accordion from '@mui/material/Accordion';
import AccordionActions from '@mui/material/AccordionActions';
import AccordionSummary from '@mui/material/AccordionSummary';
import AccordionDetails from '@mui/material/AccordionDetails';
import Typography from '@mui/material/Typography';
import ExpandMoreIcon from '@mui/icons-material/ExpandMore';
import Button from '@mui/material/Button';

export default function AccordionUsage() {
  const id = React.useId();
  return (
    <div>
      <Accordion>
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          aria-controls={`${id}-panel1-content`}
          id={`${id}-panel1-header`}
        >
          <Typography component="span">Accordion 1</Typography>
        </AccordionSummary>
        <AccordionDetails>
          Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse
          malesuada lacus ex, sit amet blandit leo lobortis eget.
        </AccordionDetails>
      </Accordion>
      <Accordion>
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          aria-controls={`${id}-panel2-content`}
          id={`${id}-panel2-header`}
        >
          <Typography component="span">Accordion 2</Typography>
        </AccordionSummary>
        <AccordionDetails>
          Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse
          malesuada lacus ex, sit amet blandit leo lobortis eget.
        </AccordionDetails>
      </Accordion>
      <Accordion defaultExpanded>
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          aria-controls={`${id}-panel3-content`}
          id={`${id}-panel3-header`}
        >
          <Typography component="span">Accordion Actions</Typography>
        </AccordionSummary>
        <AccordionDetails>
          Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse
          malesuada lacus ex, sit amet blandit leo lobortis eget.
        </AccordionDetails>
        <AccordionActions>
          <Button>Cancel</Button>
          <Button>Agree</Button>
        </AccordionActions>
      </Accordion>
    </div>
  );
}

Example dependency boundaries

react, @mui/material/Accordion, @mui/material/AccordionActions, @mui/material/AccordionSummary, @mui/material/AccordionDetails, @mui/material/Typography, @mui/icons-material/ExpandMore, @mui/material/Button, @mui/icons-material/ArrowDownward, @mui/icons-material/ArrowDropDown, @mui/material/Fade, @mui/material/styles, @mui/icons-material/ArrowForwardIosSharp

Direct Icons/System/Utils example imports require their matching 9.4.0 packages. Relative data/helpers are part of the example closure, not extra components. Remote images and simulated operations do not supply a backend.

Pinned upstream API metadata reference

These tables retain the upstream metadata, not a newly inferred generic type system. Conditional generics, inherited props and callback details are defined by the source declarations below. Theme defaults may override metadata defaults.

Accordion

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

Native inheritance: Paper. Parent/DOM props are not fabricated as additional own props.

AccordionActions

import AccordionActions from '@mui/material/AccordionActions';
import { AccordionActions } from '@mui/material';

AccordionDetails

import AccordionDetails from '@mui/material/AccordionDetails';
import { AccordionDetails } from '@mui/material';

AccordionSummary

import AccordionSummary from '@mui/material/AccordionSummary';
import { AccordionSummary } from '@mui/material';

Native inheritance: ButtonBase. Parent/DOM props are not fabricated as additional own props.

Native source declarations

Declarations/imports are extracted from pinned source without flattening unions or external inheritance. Original English comments/types are source reference, not a claim of translated upstream prose. Shared types stay in their native packages.

vendor/src/Accordion/Accordion.d.ts

import * as React from 'react';

import { SxProps } from '@mui/system';

import { Theme } from '../styles';

import { TransitionProps } from '../transitions/types';

import { AccordionClasses } from './accordionClasses';

import { OverridableComponent, OverrideProps } from '../OverridableComponent';

import { ExtendPaperTypeMap, PaperProps } from '../Paper/Paper';

import { CreateSlotsAndSlotProps, SlotComponentProps, SlotProps } from '../utils/types';

export interface AccordionSlots {
  /**
   * The component that renders the root.
   * @default Paper
   */
  root: React.ElementType;
  /**
   * The component that renders the heading.
   * @default 'h3'
   */
  heading: React.ElementType;
  /**
   * The component that renders the transition.
   * [Follow this guide](/material-ui/transitions/#transition-slots) to learn more about the requirements for this component.
   * @default Collapse
   */
  transition: React.ElementType;
  /**
   * The component that renders the region.
   * @default 'div'
   */
  region: React.ElementType;
}

export interface AccordionRootSlotPropsOverrides {}

export interface AccordionHeadingSlotPropsOverrides {}

export interface AccordionTransitionSlotPropsOverrides {}

export interface AccordionRegionSlotPropsOverrides {}

export type AccordionSlotsAndSlotProps = CreateSlotsAndSlotProps<
  AccordionSlots,
  {
    /**
     * Props forwarded to the root slot.
     * By default, the available props are based on the Paper element.
     */
    root: SlotProps<
      React.ElementType<PaperProps>,
      AccordionRootSlotPropsOverrides,
      AccordionOwnerState
    >;
    /**
     * Props forwarded to the heading slot.
     * By default, the available props are based on the h3 element.
     */
    heading: SlotProps<'h3', AccordionHeadingSlotPropsOverrides, AccordionOwnerState>;
    /**
     * Props forwarded to the transition slot.
     * By default, the available props are based on the [Collapse](https://mui.com/material-ui/api/collapse/#props) component.
     */
    transition: SlotComponentProps<
      React.ElementType<TransitionProps>,
      TransitionProps & AccordionTransitionSlotPropsOverrides,
      AccordionOwnerState
    >;
    /**
     * Props forwarded to the region slot.
     * By default, the available props are based on the div element.
     */
    region: SlotProps<'div', AccordionRegionSlotPropsOverrides, AccordionOwnerState>;
  }
>;

export interface AccordionOwnProps {
  /**
   * The content of the component.
   */
  children: NonNullable<React.ReactNode>;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<AccordionClasses> | undefined;
  /**
   * If `true`, expands the accordion by default.
   * @default false
   */
  defaultExpanded?: boolean | undefined;
  /**
   * If `true`, the component is disabled.
   * @default false
   */
  disabled?: boolean | undefined;
  /**
   * If `true`, it removes the margin between two expanded accordion items and prevents the increased height when expanded.
   * @default false
   */
  disableGutters?: boolean | undefined;
  /**
   * If `true`, expands the accordion, otherwise collapses it.
   * Setting this prop enables control over the accordion.
   */
  expanded?: boolean | undefined;
  /**
   * Callback fired when the expand/collapse state is changed.
   *
   * @param {React.SyntheticEvent} event The event source of the callback. **Warning**: This is a generic event not a change event.
   * @param {boolean} expanded The `expanded` state of the accordion.
   */
  onChange?: ((event: React.SyntheticEvent, expanded: boolean) => void) | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export type AccordionTypeMap<
  AdditionalProps = {},
  RootComponent extends React.ElementType = 'div',
> = ExtendPaperTypeMap<
  {
    props: AdditionalProps & AccordionOwnProps & AccordionSlotsAndSlotProps;
    defaultComponent: RootComponent;
  },
  'onChange' | 'classes'
>;

declare const Accordion: OverridableComponent<AccordionTypeMap>;

export type AccordionProps<
  RootComponent extends React.ElementType = AccordionTypeMap['defaultComponent'],
  AdditionalProps = {},
> = OverrideProps<AccordionTypeMap<AdditionalProps, RootComponent>, RootComponent> & {
  component?: React.ElementType | undefined;
};

export interface AccordionOwnerState extends AccordionProps {}

vendor/src/AccordionActions/AccordionActions.d.ts

import * as React from 'react';

import { SxProps } from '@mui/system';

import { Theme } from '../styles';

import { InternalStandardProps as StandardProps } from '../internal';

import { AccordionActionsClasses } from './accordionActionsClasses';

export interface AccordionActionsProps extends StandardProps<React.HTMLAttributes<HTMLDivElement>> {
  /**
   * The content of the component.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<AccordionActionsClasses> | undefined;
  /**
   * If `true`, the actions do not have additional margin.
   * @default false
   */
  disableSpacing?: boolean | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export default function AccordionActions(props: AccordionActionsProps): React.JSX.Element;

vendor/src/AccordionDetails/AccordionDetails.d.ts

import * as React from 'react';

import { SxProps } from '@mui/system';

import { Theme } from '../styles';

import { InternalStandardProps as StandardProps } from '../internal';

import { AccordionDetailsClasses } from './accordionDetailsClasses';

export interface AccordionDetailsProps extends StandardProps<React.HTMLAttributes<HTMLDivElement>> {
  /**
   * The content of the component.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<AccordionDetailsClasses> | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export default function AccordionDetails(props: AccordionDetailsProps): React.JSX.Element;

vendor/src/AccordionSummary/AccordionSummary.d.ts

import * as React from 'react';

import { SxProps } from '@mui/system';

import { ButtonBaseProps, ExtendButtonBase, ExtendButtonBaseTypeMap } from '../ButtonBase';

import { OverrideProps } from '../OverridableComponent';

import { CreateSlotsAndSlotProps, SlotProps } from '../utils/types';

import { Theme } from '../styles';

import { AccordionSummaryClasses } from './accordionSummaryClasses';

export interface AccordionSummarySlots {
  /**
   * The component that renders the root slot.
   * @default ButtonBase
   */
  root: React.ElementType;
  /**
   * The component that renders the content slot.
   * @default div
   */
  content: React.ElementType;
  /**
   * The component that renders the expand icon wrapper slot.
   * @default div
   */
  expandIconWrapper: React.ElementType;
}

export interface AccordionSummaryRootSlotPropsOverrides {}

export interface AccordionSummaryContentSlotPropsOverrides {}

export interface AccordionSummaryExpandIconWrapperSlotPropsOverrides {}

export type AccordionSummarySlotsAndSlotProps = CreateSlotsAndSlotProps<
  AccordionSummarySlots,
  {
    /**
     * Props forwarded to the root slot.
     * By default, the available props are based on the [ButtonBase](https://mui.com/material-ui/api/button-base/#props) component.
     */
    root: SlotProps<
      React.ElementType<ButtonBaseProps>,
      AccordionSummaryRootSlotPropsOverrides,
      AccordionSummaryOwnerState
    >;
    /**
     * Props forwarded to the content slot.
     * By default, the available props are based on a div element.
     */
    content: SlotProps<
      'div',
      AccordionSummaryContentSlotPropsOverrides,
      AccordionSummaryOwnerState
    >;
    /**
     * Props forwarded to the expand icon wrapper slot.
     * By default, the available props are based on a div element.
     */
    expandIconWrapper: SlotProps<
      'div',
      AccordionSummaryExpandIconWrapperSlotPropsOverrides,
      AccordionSummaryOwnerState
    >;
  }
>;

export interface AccordionSummaryOwnProps extends AccordionSummarySlotsAndSlotProps {
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<AccordionSummaryClasses> | undefined;
  /**
   * The icon to display as the expand indicator.
   */
  expandIcon?: React.ReactNode;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export type AccordionSummaryTypeMap<
  AdditionalProps = {},
  RootComponent extends React.ElementType = 'div',
> = ExtendButtonBaseTypeMap<{
  props: AdditionalProps & AccordionSummaryOwnProps;
  defaultComponent: RootComponent;
}>;

export interface AccordionSummaryOwnerState extends Omit<
  AccordionSummaryProps,
  'slots' | 'slotProps'
> {}

declare const AccordionSummary: ExtendButtonBase<AccordionSummaryTypeMap>;

export type AccordionSummaryProps<
  RootComponent extends React.ElementType = AccordionSummaryTypeMap['defaultComponent'],
  AdditionalProps = {},
> = OverrideProps<AccordionSummaryTypeMap<AdditionalProps, RootComponent>, RootComponent> & {
  component?: React.ElementType | undefined;
};

Post-install acceptance

Run strict types, production build and real interactions. Check keyboard labels/focus, disabled/error/read-only semantics where natively supported, both themes, narrow screens and reduced motion. Verify callbacks against the real host data; do not declare installation complete from copying a prompt. Initialization fixtures also require server HTML and warning-free hydration.

Source and license

https://github.com/mui/material-ui/tree/809a7717b4c050ba3f69b75300689f07c050a16e

MIT · @mui/material@9.4.0. Vendor originals and license are preserved. Full original upstream prose remains in vendor/docs and is not represented as fully translated.