React Sortable Tree

Demo

Usage

import React, { Component } from 'react';
import SortableTree from 'react-sortable-tree';
import 'react-sortable-tree/style.css'; // This only needs to be imported once in your app

export default class Tree extends Component {
  constructor(props) {
    super(props);

    this.state = {
      treeData: [{ title: 'Chicken', children: [{ title: 'Egg' }] }],
    };
  }

  render() {
    return (
      <div style={{ height: 400 }}>
        <SortableTree
          treeData={this.state.treeData}
          onChange={treeData => this.setState({ treeData })}
        />
      </div>
    );
  }
}

Find more examples in the Storybook

Play with the code on an example on CodeSandbox

Options

Prop	Type	Description
treeData (required)	object[]	Tree data with the following keys: `title` is the primary label for the node. `subtitle` is a secondary label for the node. `expanded` shows children of the node if true, or hides them if false. Defaults to false. `children` is an array of child nodes belonging to the node. Example: `[{title: 'main', subtitle: 'sub'}, { title: 'value2', expanded: true, children: [{ title: 'value3') }] }]`
onChange (required)	func	Called whenever tree data changed. Just like with React input elements, you have to update your own component's data to see the changes reflected. `( treeData: object[] ): void`
getNodeKey (recommended)	func	Specify the unique key used to identify each node and generate the `path` array passed in callbacks. With a setting of `getNodeKey={({ node }) => node.id}`, for example, in callbacks this will let you easily determine that the node with an `id` of `35` is (or has just become) a child of the node with an `id` of `12`, which is a child of ... and so on. It uses `defaultGetNodeKey` by default, which returns the index in the tree (omitting hidden nodes). `({ node: object, treeIndex: number }): string or number`
generateNodeProps	func	Generate an object with additional props to be passed to the node renderer. Use this for adding buttons via the `buttons` key, or additional `style` / `className` settings. `({ node: object, path: number[] or string[], treeIndex: number, lowerSiblingCounts: number[], isSearchMatch: bool, isSearchFocus: bool }): object`
onMoveNode	func	Called after node move operation. `({ treeData: object[], node: object, nextParentNode: object, prevPath: number[] or string[], prevTreeIndex: number, nextPath: number[] or string[], nextTreeIndex: number }): void`
onVisibilityToggle	func	Called after children nodes collapsed or expanded. `({ treeData: object[], node: object, expanded: bool, path: number[] or string[] }): void`
onDragStateChanged	func	Called when a drag is initiated or ended. `({ isDragging: bool, draggedNode: object }): void`
maxDepth	number	Maximum depth nodes can be inserted at. Defaults to infinite.
canDrag	func or bool	Return false from callback to prevent node from dragging, by hiding the drag handle. Set prop to `false` to disable dragging on all nodes. Defaults to `true`. `({ node: object, path: number[] or string[], treeIndex: number, lowerSiblingCounts: number[], isSearchMatch: bool, isSearchFocus: bool }): bool`
canDrop	func	Return false to prevent node from dropping in the given location. `({ node: object, prevPath: number[] or string[], prevParent: object, prevTreeIndex: number, nextPath: number[] or string[], nextParent: object, nextTreeIndex: number }): bool`
theme	object	Set an all-in-one packaged appearance for the tree. See the Themes section for more information.
searchMethod	func	The method used to search nodes. Defaults to `defaultSearchMethod`, which uses the `searchQuery` string to search for nodes with matching `title` or `subtitle` values. NOTE: Changing `searchMethod` will not update the search, but changing the `searchQuery` will. `({ node: object, path: number[] or string[], treeIndex: number, searchQuery: any }): bool`
searchQuery	string or any	Used by the `searchMethod` to highlight and scroll to matched nodes. Should be a string for the default `searchMethod`, but can be anything when using a custom search. Defaults to `null`.
searchFocusOffset	number	Outline the <`searchFocusOffset`>th node and scroll to it.
searchFinishCallback	func	Get the nodes that match the search criteria. Used for counting total matches, etc. `(matches: { node: object, path: number[] or string[], treeIndex: number }[]): void`
dndType	string	String value used by react-dnd (see overview at the link) for dropTargets and dragSources types. If not set explicitly, a default value is applied by react-sortable-tree for you for its internal use. NOTE: Must be explicitly set and the same value used in order for correct functioning of external nodes
shouldCopyOnOutsideDrop	func or bool	Return true, or a callback returning true, and dropping nodes to react-dnd drop targets outside of the tree will not remove them from the tree. Defaults to `false`. `({ node: object, prevPath: number[] or string[], prevTreeIndex: number, }): bool`
reactVirtualizedListProps	object	Custom properties to hand to the react-virtualized list
style	object	Style applied to the container wrapping the tree (style defaults to `{height: '100%'}`)
innerStyle	object	Style applied to the inner, scrollable container (for padding, etc.)
className	string	Class name for the container wrapping the tree
rowHeight	number or func	Used by react-virtualized. Defaults to `62`. Either a fixed row height (number) or a function that returns the height of a row given its index: `({ treeIndex: number, node: object, path: number[] or string[] }): number`
slideRegionSize	number	Size in px of the region near the edges that initiates scrolling on dragover. Defaults to `100`.
scaffoldBlockPxWidth	number	The width of the blocks containing the lines representing the structure of the tree. Defaults to `44`.
isVirtualized	bool	Set to false to disable virtualization. Defaults to `true`. NOTE: Auto-scrolling while dragging, and scrolling to the `searchFocusOffset` will be disabled.
nodeContentRenderer	any	Override the default component (`NodeRendererDefault`) for rendering nodes (but keep the scaffolding generator). This is a last resort for customization - most custom styling should be able to be solved with `generateNodeProps`, a `theme` or CSS rules. If you must use it, is best to copy the component in `node-renderer-default.js` to use as a base, and customize as needed.
placeholderRenderer	any	Override the default placeholder component (`PlaceholderRendererDefault`) which is displayed when the tree is empty. This is an advanced option, and in most cases should probably be solved with a `theme` or custom CSS instead.

Data Helper Functions

Need a hand turning your flat data into nested tree data? Want to perform add/remove operations on the tree data without creating your own recursive function? Check out the helper functions exported from tree-data-utils.js.

Notable among the available functions:

getTreeFromFlatData: Convert flat data (like that from a database) into nested tree data
getFlatDataFromTree: Convert tree data back to flat data
addNodeUnderParent: Add a node under the parent node at the given path
removeNode: For a given path, get the node at that path and the treeData with that node removed.
changeNodeAtPath: Modify the node object at the given path
map: Perform a change on every node in the tree
walk: Visit every node in the tree in order

Documentation for each method is only available in the code at this time. You can also refer to the tests for simple usage examples. If your hobbies happen to include writing documentation, by all means submit a pull request. It would really help out.

Themes

Using the theme prop along with an imported theme module, you can easily override the default appearance with another standard one.

Featured themes


File Explorer	Full Node Drag
react-sortable-tree-theme-file-explorer	react-sortable-tree-theme-full-node-drag
Github \| NPM	Github \| NPM

Help Wanted - As the themes feature has just been enabled, there are very few (only two at the time of this writing) theme modules available. If you've customized the appearance of your tree to be especially cool or easy to use, I would be happy to feature it in this readme with a link to the Github repo and NPM page if you convert it to a theme. You can use my file explorer theme repo as a template to plug in your own stuff.

Browser Compatibility

Browser	Works?
Chrome	Yes
Firefox	Yes
Safari	Yes
IE 11	Yes

Troubleshooting

If it throws "TypeError: fn is not a function" errors in production

This issue may be related to an ongoing incompatibility between UglifyJS and Webpack's behavior. See an explanation at create-react-app#2376.

The simplest way to mitigate this issue is by adding comparisons: false to your Uglify config as seen here: https://github.com/facebookincubator/create-react-app/pull/2379/files

If it doesn't work with other components that use react-dnd

react-dnd only allows for one DragDropContext at a time (see: react-dnd/react-dnd#186). To get around this, you can import the context-less tree component via SortableTreeWithoutDndContext.

// before
import SortableTree from 'react-sortable-tree';

// after
import { SortableTreeWithoutDndContext as SortableTree } from 'react-sortable-tree';

Contributing

After cloning the repository and running npm install inside, you can use the following commands to develop and build the project.

# Starts a webpack dev server that hosts a demo page with the component.
# It uses react-hot-loader so changes are reflected on save.
npm start

# Start the storybook, which has several different examples to play with.
# Also hot-reloaded.
npm run storybook

# Runs the library tests
npm test

# Lints the code with eslint
npm run lint

# Lints and builds the code, placing the result in the dist directory.
# This build is necessary to reflect changes if you're
#  `npm link`-ed to this repository from another local project.
npm run build

Pull requests are welcome!

License

MIT

License

lonyele/react-sortable-tree

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