react-component/tree

README

@rc-component/tree

_{Part of the Ant Design ecosystem.}

🌳 Accessible tree view primitives for React, maintained in the Ant Design ecosystem.

Highlights

Controlled and uncontrolled expansion, selection, checking, drag and drop, and async loading.
Virtual scrolling for large trees through @rc-component/virtual-list.
TypeScript definitions for tree data, node props, and event payloads.

Install

npm install @rc-component/tree

Usage

import Tree from '@rc-component/tree';
import type { DataNode } from '@rc-component/tree';
import '@rc-component/tree/assets/index.css';

const treeData: DataNode[] = [
  {
    key: '0',
    title: 'Documents',
    children: [{ key: '0-0', title: 'Roadmap' }],
  },
];

export default () => (
  <Tree defaultExpandAll treeData={treeData} onSelect={keys => console.log(keys)} />
);

Examples

Run the local dumi site:

npm install
npm start

Then open http://localhost:8000.

API

Tree props

name	description	type	default
autoExpandParent	whether auto expand parent treeNodes	bool	false
checkable	whether support checked	bool/React Node	false
checkedKeys	Controlled checked treeNodes(After setting, defaultCheckedKeys will not work). Note: parent and children nodes are associated, if the parent node's key exists, it all children node will be checked, and vice versa. When set checkable and checkStrictly, it should be an object, which contains checked array and halfChecked array.	String[]/{checked:Array,halfChecked:Array}	[]
checkStrictly	check node precisely, parent and children nodes are not associated	bool	false
className	additional css class of root dom node	String	''
defaultCheckedKeys	default checked treeNodes	String[]	[]
defaultExpandedKeys	expand specific treeNodes	String[]	[]
defaultExpandAll	expand all treeNodes	bool	false
defaultExpandParent	auto expand parent treeNodes when init	bool	true
defaultSelectedKeys	default selected treeNodes	String[]	[]
disabled	whether disabled the tree	bool	false
draggable	whether can drag treeNode. (drag events are not supported in Internet Explorer 8 and earlier versions or Safari 5.1 and earlier versions.)	bool \| ({ node }) => boolean	false
expandedKeys	Controlled expand specific treeNodes	String[]	-
filterTreeNode	filter some treeNodes as you need. it should return true	function(node)	-
icon	customize icon. When you pass component, whose render will receive full TreeNode props as component props	element/Function(props)	-
loadedKeys	Mark node is loaded when `loadData` is true	String[]	-
loadData	load data asynchronously and the return value should be a promise	function(node)	-
multiple	whether multiple select	bool	false
prefixCls	prefix class	String	'rc-tree'
selectable	whether can be selected	bool	true
selectedKeys	Controlled selected treeNodes(After setting, defaultSelectedKeys will not work)	String[]	[]
showIcon	whether show icon	bool	true
showLine	whether show line	bool	false
treeData	treeNodes data Array, if set it then you need not to construct children TreeNode. (value should be unique across the whole array)	array<{key,title,children, [disabled, selectable]}>	-
onCheck	click the treeNode/checkbox to fire	function(checkedKeys, e:{checked: bool, checkedNodes, node, event, nativeEvent})	-
onExpand	fire on treeNode expand or not	function(expandedKeys, {expanded: bool, node, nativeEvent})	-
onDragEnd	it execs when fire the tree's dragend event	function({event,node})	-
onDragEnter	it execs when fire the tree's dragenter event	function({event,node,expandedKeys})	-
onDragLeave	it execs when fire the tree's dragleave event	function({event,node})	-
onDragOver	it execs when fire the tree's dragover event	function({event,node})	-
onDragStart	it execs when fire the tree's dragstart event	function({event,node})	-
onDrop	it execs when fire the tree's drop event	function({event, node, dragNode, dragNodesKeys})	-
onLoad	Trigger when a node is loaded. If you set the `loadedKeys`, you must handle `onLoad` to avoid infinity loop	function(loadedKeys, {event, node})	-
onMouseEnter	call when mouse enter a treeNode	function({event,node})	-
onMouseLeave	call when mouse leave a treeNode	function({event,node})	-
onRightClick	select current treeNode and show customized contextmenu	function({event,node})	-
onSelect	click the treeNode to fire	function(selectedKeys, e:{selected: bool, selectedNodes, node, event, nativeEvent})	-
switcherIcon	specific the switcher icon.	ReactNode / (props: TreeNodeAttribute) => ReactNode	-
virtual	Disable virtual scroll when `false`	boolean	-
allowDrop	Whether to allow drop on node	({ dragNode, dropNode, dropPosition }) => boolean	-
dropIndicatorRender	The indicator to render when dragging	({ dropPosition, dropLevelOffset, indent: number, prefixCls }) => ReactNode	-
direction	Display direction of the tree, it may affect dragging behavior	`ltr` \| `rtl`	-
expandAction	Tree open logic, optional: false \| `click` \| `doubleClick`	string \| boolean	`click`

TreeNode props

note: if you have a lot of TreeNode, like more than 1000,
make the parent node is collapsed by default, will obvious effect, very fast.
Because the children hide TreeNode will not insert into dom.

name	description	type	default
className	additional class to treeNode	String	''
checkable	control node checkable if Tree is checkable	bool	false
style	set style to treeNode	Object	''
disabled	whether disabled the treeNode	bool	false
disableCheckbox	whether disable the treeNode' checkbox	bool	false
title	tree/subTree's title	String/element/((data: DataNode) => React.ReactNode)	'---'
key	it's used with tree props's (default)ExpandedKeys / (default)CheckedKeys / (default)SelectedKeys. you'd better to set it, and it must be unique in the tree's all treeNodes	String	treeNode's position
isLeaf	whether it's leaf node	bool	false
selectable	whether the treeNode can be selected	bool	true
icon	customize icon. When you pass component, whose render will receive full TreeNode props as component props	element/Function(props)	-
switcherIcon	specific the switcher icon.	ReactNode / (props: TreeNodeAttribute) => ReactNode	-

Note

The number of treeNodes can be very large, but when enable checkable, it will spend more computing time, so we cached some calculations(e.g. this.treeNodesStates), to avoid double computing. But, this bring some restrictions, when you async load treeNodes, you should render tree like this {this.state.treeData.length ? <Tree ...>{this.state.treeData.map(t => <TreeNode ... />)}</Tree> : 'loading tree'}

Development

npm install
npm start

The dumi site runs at http://localhost:8000 by default.

Run checks before sending a pull request:

npm run lint
npm run tsc
npm test -- --runInBand
npm run build

Release

npm run prepublishOnly

The release flow is handled by @rc-component/np through the rc-np command after the package build.

Ecosystem

This package is part of the React Component organization and is maintained alongside Ant Design. The Ant Design mark above is used only as ecosystem context; the package itself stays framework-level and unstyled except for its bundled assets.

Other tree views

License

@rc-component/tree is released under the MIT license.