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Accordion

The Accordion component lets users show and hide sections of related content on a page.

Introduction

The Material UI Accordion component includes several complementary utility components to handle various use cases:

  • Accordion: the wrapper for grouping related components.
  • Accordion Summary: the wrapper for the Accordion header, which expands or collapses the content when clicked.
  • Accordion Details: the wrapper for the Accordion content.
  • Accordion Actions: an optional wrapper that groups a set of buttons.
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Accordion Actions
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Basics

import Accordion from '@mui/material/Accordion';
import AccordionDetails from '@mui/material/AccordionDetails';
import AccordionSummary from '@mui/material/AccordionSummary';

Expand icon

Use the expandIcon prop on the Accordion Summary component to change the expand indicator icon. The component handles the turning upside-down transition automatically.

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Expanded by default

Use the defaultExpanded prop on the Accordion component to have it opened by default.

Expanded by default

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Transition

Use the slots.transition and slotProps.transition props to change the Accordion's default transition.

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Disabled item

Use the disabled prop on the Accordion component to disable interaction and focus.

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Controlled Accordion

The Accordion component can be controlled or uncontrolled.

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Customization

Only one expanded at a time

Use the expanded prop with React's useState hook to allow only one Accordion item to be expanded at a time. The demo below also shows a bit of visual customization.

Collapsible Group Item #1

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Performance

The Accordion content is mounted by default even if it's not expanded. This default behavior has server-side rendering and SEO in mind.

If you render the Accordion Details with a big component tree nested inside, or if you have many Accordions, you may want to change this behavior by setting unmountOnExit to true inside the slotProps.transition prop to improve performance:

<Accordion slotProps={{ transition: { unmountOnExit: true } }} />

Accessibility

The WAI-ARIA guidelines for accordions recommend setting an id and aria-controls, which in this case would apply to the Accordion Summary component. The Accordion component then derives the necessary aria-labelledby and id from its content.

<Accordion>
  <AccordionSummary id="panel-header" aria-controls="panel-content">
    Header
  </AccordionSummary>
  <AccordionDetails>
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  </AccordionDetails>
</Accordion>

Anatomy

The Accordion component is composed of a root <div> that houses interior elements like the Accordion Summary and other optional components (such as buttons or decorators).

<div class="MuiAccordion-root">
  <div class="MuiButtonBase-root MuiAccordionSummary-root" role="button" aria-expanded="">
      <!-- Accordion header button goes here -->
  </div>
  <div class="MuiAccordion-region" role="region">
    <div class="MuiAccordionDetails-root">
      <!-- Accordion content goes here -->
    </div>
  </div>
</div>

API

See the documentation below for a complete reference to all of the props and classes available to the components mentioned here.