Drag-and-drop sortable component for nested data and hierarchies
ksaxberg and wuweiweiwu Childless Nodes (#402)
* create configurable canNodeHaveChildren function

* add to proptypes

* simplify the documentation example

* add story, modify example slightly

* Add canNodeHaveChildren to props list in readme
Latest commit af8bc63 Oct 7, 2018

README.md

React Sortable Tree

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A React component for Drag-and-drop sortable representation of hierarchical data. Checkout the demo for a demonstration of some basic features. Checkout the storybook for advanced usage. Play with the code on CodeSandbox.io.

Table of Contents

Getting started

Install react-sortable-tree using npm.

# NPM
npm install react-sortable-tree --save

# YARN
yarn add react-sortable-tree

ES6 and CommonJS builds are available with each distribution. For example:

// This only needs to be done once; probably during your application's bootstrapping process.
import 'react-sortable-tree/style.css';

// You can import the default tree with dnd context
import SortableTree from 'react-sortable-tree';

// Or you can import the tree without the dnd context as a named export. eg
import { SortableTreeWithoutDndContext as SortableTree } from 'react-sortable-tree';

// Importing from cjs (default)
import SortableTree from 'react-sortable-tree/dist/index.cjs.js';
import SortableTree from 'react-sortable-tree';

// Importing from esm
import SortableTree from 'react-sortable-tree/dist/index.esm.js';

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>
    );
  }
}

Props

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.
rowDirection string Adds row direction support if set to 'rtl' Defaults to 'ltr'.
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
canNodeHaveChildren func Function to determine whether a node can have children, useful for preventing hover preview when you have a canDrop condition. Default is set to a function that returns true. Functions should be of type (node): 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.
onlyExpandSearchedNodes boolean Only expand the nodes that match searches. Collapses all other nodes. Defaults to false.
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 internal 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-sortable-tree. 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.

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 Theme Full Node Drag Theme MINIMAL THEME
File Explorer Full Node Drag Minimalistic theme inspired from MATERIAL UI
react-sortable-tree-theme-file-explorer react-sortable-tree-theme-full-node-drag react-sortable-tree-theme-minimal
Github | NPM 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: https://github.com/gaearon/react-dnd/issues/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

Please read the Code of Conduct. I actively welcome pull requests :)

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