materialuiupgraded/pages/api/expansion-panel-summary.md

Material-UI's workspace package

---
filename: /packages/material-ui/src/ExpansionPanelSummary/ExpansionPanelSummary.js
title: ExpansionPanelSummary API
---

<!--- This documentation is automatically generated, do not try to edit it. -->

# ExpansionPanelSummary

<p class="description">The API documentation of the ExpansionPanelSummary React component. Learn more about the properties and the CSS customization points.</p>

```js
import ExpansionPanelSummary from '@material-ui/core/ExpansionPanelSummary';
```



## Props

| Name | Type | Default | Description |
|:-----|:-----|:--------|:------------|
| <span class="prop-name">children</span> | <span class="prop-type">node |   | The content of the expansion panel summary. |
| <span class="prop-name">classes</span> | <span class="prop-type">object |   | Override or extend the styles applied to the component. See [CSS API](#css-api) below for more details. |
| <span class="prop-name">expandIcon</span> | <span class="prop-type">node |   | The icon to display as the expand indicator. |
| <span class="prop-name">IconButtonProps</span> | <span class="prop-type">object |   | Properties applied to the `TouchRipple` element wrapping the expand icon. |

Any other properties supplied will be spread to the root element ([ButtonBase](/api/button-base/)).

## CSS API

You can override all the class names injected by Material-UI thanks to the `classes` property.
This property accepts the following keys:


| Name | Description |
|:-----|:------------|
| <span class="prop-name">root</span> | Styles applied to the root element.
| <span class="prop-name">expanded</span> | Styles applied to the root element if `expanded={true}`.
| <span class="prop-name">focused</span> | Styles applied to the root and children wrapper elements when focused.
| <span class="prop-name">disabled</span> | Styles applied to the root element if `disabled={true}`.
| <span class="prop-name">content</span> | Styles applied to the children wrapper element.
| <span class="prop-name">expandIcon</span> | Styles applied to the `IconButton` component when `expandIcon` is supplied.

Have a look at [overriding with classes](/customization/overrides/#overriding-with-classes) section
and the [implementation of the component](https://github.com/mui-org/material-ui/tree/master/packages/material-ui/src/ExpansionPanelSummary/ExpansionPanelSummary.js)
for more detail.

If using the `overrides` key of the theme as documented
[here](/customization/themes/#customizing-all-instances-of-a-component-type),
you need to use the following style sheet name: `MuiExpansionPanelSummary`.

## Inheritance

The properties of the [ButtonBase](/api/button-base/) component are also available.
You can take advantage of this behavior to [target nested components](/guides/api/#spread).

## Demos

- [Expansion Panels](/demos/expansion-panels/)