TreeItem API

API reference docs for the React TreeItem 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:

import { TreeItem } from '@mui/x-tree-view/TreeItem';
// or
import { TreeItem } from '@mui/x-tree-view';

Props of the native component are also available.

Name	Type	Default	Description
nodeId*	string	-	The id of the node.
children	node	-	The content of the component.
classes	object	-	Override or extend the styles applied to the component. See CSS API below for more details.
ContentComponent	element type	TreeItemContent	The component used for the content node. This needs to be able to hold a ref.
ContentProps	object	-	Props applied to ContentComponent.
disabled	bool	false	If `true`, the node is disabled.
label	node	-	The tree node label.
onFocus	unsupportedProp	-	This prop isn't supported. Use the `onNodeFocus` callback on the tree if you need to monitor a node's focus.
slotProps	object	{}	The props used for each component slot.
slots	object	{}	Overridable component slots. See Slots API below for more details.
sx	Array<func \| object \| bool> \| func \| object	-	The system prop that allows defining system overrides as well as additional CSS styles. See the `sx` page for more details.
TransitionComponent	elementType	Collapse	The component used for the transition. Follow this guide to learn more about the requirements for this component.
TransitionProps	object	-	Props applied to the transition element. By default, the element is based on this `Transition` component.

The ref is forwarded to the root element.

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

Slot name	Class name	Default component	Description
collapseIcon			The icon used to collapse the node.
expandIcon			The icon used to expand the node.
endIcon			The icon displayed next to an end node.
icon			The icon to display next to the tree node's label.

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

Class name	Rule name	Description
.Mui-disabled		State class applied to the element when disabled.
.Mui-expanded		State class applied to the content element when expanded.
.Mui-focused		State class applied to the content element when focused.
.Mui-selected		State class applied to the content element when selected.
.MuiTreeItem-content	content	Styles applied to the content element.
.MuiTreeItem-group	group	Styles applied to the transition component.
.MuiTreeItem-iconContainer	iconContainer	Styles applied to the tree node icon.
.MuiTreeItem-label	label	Styles applied to the label element.
.MuiTreeItem-root	root	Styles applied to the root element.

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.