rc-tree

What is rc-tree?

The rc-tree npm package is a React component for displaying tree views. It provides flexible and efficient tree components with customizable nodes, drag-and-drop functionality, checkable nodes, and event handling for various actions like select, check, load data asynchronously, and more. It's suitable for implementing features like file systems, nested menus, or any hierarchical data representation.

What are rc-tree's main functionalities?

Basic Tree Structure

This feature allows the creation of a basic tree structure with nested nodes. The `treeData` prop defines the hierarchical structure of the tree.

import Tree from 'rc-tree';

const treeData = [{
  title: 'parent 1',
  key: '0-0',
  children: [{
    title: 'child 1-1',
    key: '0-0-1',
    children: [{
      title: 'leaf',
      key: '0-0-1-1'
    }]
  }, {
    title: 'child 1-2',
    key: '0-0-2',
    children: [{
      title: 'leaf',
      key: '0-0-2-1'
    }]
  }]
}];

<Tree treeData={treeData} />

Drag-and-Drop

Enables drag-and-drop functionality within the tree, allowing users to reorder nodes by dragging them. Event handlers like `onDragEnter` and `onDrop` can be used to manage the drag-and-drop process.

import Tree from 'rc-tree';

<Tree
  treeData={treeData}
  draggable
  onDragEnter={info => console.log('enter:', info)}
  onDrop={info => console.log('drop:', info)}
/>

Checkable Nodes

This feature adds checkboxes to tree nodes, making them selectable. The `onCheck` event handler is triggered when checkboxes are checked or unchecked, allowing for custom handling of these events.

import Tree from 'rc-tree';

<Tree
  checkable
  onCheck={checkedKeys => console.log('onCheck', checkedKeys)}
  treeData={treeData}
/>

Async Data Loading

Supports loading data asynchronously for nodes. This is useful for loading child nodes on demand, for example, when a node is expanded. The `loadData` function is called to fetch child nodes asynchronously.

import Tree from 'rc-tree';

const loadData = treeNode =>
  new Promise(resolve => {
    setTimeout(() => {
      resolve();
    }, 1000);
  });

<Tree loadData={loadData} treeData={treeData} />

Other packages similar to rc-tree

react-sortable-tree

A package that provides a higher-order component for creating sortable drag-and-drop trees. It offers similar drag-and-drop capabilities but focuses more on the sorting aspect within the tree structure, compared to rc-tree's broader feature set.

antd

While not exclusively a tree component library, Ant Design (antd) includes a Tree component with features similar to rc-tree, such as drag-and-drop, checkable nodes, and async data loading. Ant Design's Tree component is styled according to the Ant Design system, providing a consistent look and feel for applications using Ant Design.

README

rc-tree

Tree component.

Screenshots

Feature

• Support all popular browsers, including Internet Explorer 9 and above.

Example

http://localhost:9001/

online example: https://tree.react-component.now.sh/

Install

Usage

see examples

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	({ 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	-

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	-
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
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

Test Case

http://localhost:8018/tests/runner.html?coverage

Coverage

http://localhost:8018/node_modules/rc-server/node_modules/node-jscover/lib/front-end/jscoverage.html?w=http://localhost:8018/tests/runner.html?coverage

License

rc-tree is released under the MIT license.

Other tree views

• zTree
• jqTree
• jquery.treeselect
• Angular Multi Select Tree