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Accordion

Accordions contain creation flows and allow lightweight editing of an element.

An accordion is a lightweight container that may either be used standalone, or be connected to a larger surface, such as a card.

Note: Accordions are no longer documented in the Material Design guidelines, but Material-UI will continue to support them. It was formerly known as the "expansion panel".

Basic accordion

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Controlled accordion

Extend the default behavior to create an accordion with the Accordion component.

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Customized accordion

Here is an example of customizing the component. You can learn more about this in the overrides documentation page.

Collapsible Group Item #1

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Performance

The content of Accordions is mounted by default even if the accordion is not expanded. This default behavior has server-side rendering and SEO in mind. If you render expensive component trees inside your accordion details or simply render many accordions it might be a good idea to change this default behavior by enabling the unmountOnExit in TransitionProps:

<Accordion TransitionProps={{ unmountOnExit: true }} />

As with any performance optimization this is not a silver bullet. Be sure to identify bottlenecks first and then try out these optimization strategies.

Accessibility

(WAI-ARIA: https://www.w3.org/TR/wai-aria-practices/#accordion)

For optimal accessibility we recommend setting id and aria-controls on the AccordionSummary. The Accordion will derive the necessary aria-labelledby and id for the content region of the accordion.