TreeItem API

API documentation for the React TreeItem component. Learn about the available props and the CSS API.

Import

import TreeItem from '@mui/lab/TreeItem';
// or
import { TreeItem } from '@mui/lab';

The name MuiTreeItem can be used when providing default props or style overrides in the theme.

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.
collapseIcon	node		The icon used to collapse the node.
ContentComponent	element type	TreeItemContent	The component used for the content node. ⚠️ Needs to be able to hold a ref.
ContentProps	object		Props applied to ContentComponent
disabled	bool	false	If `true`, the node is disabled.
endIcon	node		The icon displayed next to a end node.
expandIcon	node		The icon used to expand the node.
icon	node		The icon to display next to the tree node's label.
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.
sx	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.

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