# React Sortable Tree ![NPM version](https://img.shields.io/npm/v/react-sortable-tree.svg?style=flat) ![NPM license](https://img.shields.io/npm/l/react-sortable-tree.svg?style=flat) [![NPM total downloads](https://img.shields.io/npm/dt/react-sortable-tree.svg?style=flat)](https://npmcharts.com/compare/react-sortable-tree?minimal=true) [![NPM monthly downloads](https://img.shields.io/npm/dm/react-sortable-tree.svg?style=flat)](https://npmcharts.com/compare/react-sortable-tree?minimal=true) [![Build Status](https://travis-ci.org/frontend-collective/react-sortable-tree.svg?branch=master)](https://travis-ci.org/frontend-collective/react-sortable-tree) [![Coverage Status](https://coveralls.io/repos/github/frontend-collective/react-sortable-tree/badge.svg?branch=master)](https://coveralls.io/github/frontend-collective/react-sortable-tree?branch=master) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](http://makeapullrequest.com) > A React component for Drag-and-drop sortable representation of hierarchical data. Checkout the [Storybook](https://frontend-collective.github.io/react-sortable-tree/) for a demonstration of some basic and advanced features.

## Table of Contents - [Getting Started](#getting-started) - [Usage](#usage) - [Props](#props) - [Data Helpers](#data-helper-functions) - [Themes](#themes) - [Browser Compatibility](#browser-compatibility) - [Troubleshooting](#troubleshooting) - [Contributing](#contributing) ## Getting started Install `react-sortable-tree` using npm. ```sh # NPM npm install react-sortable-tree --save # YARN yarn add react-sortable-tree ``` ES6 and CommonJS builds are available with each distribution. For example: ```js // 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 ```jsx 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' }] }, { title: 'Fish', children: [{ title: 'fingerline' }] }, ], }; } render() { return (

this.setState({ treeData })} />

); } } ``` ## 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`](https://github.com/frontend-collective/react-sortable-tree/blob/master/src/utils/default-handlers.js) 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`

`({ 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](#themes) section for more information. | | searchMethod | func | The method used to search nodes. Defaults to [`defaultSearchMethod`](https://github.com/frontend-collective/react-sortable-tree/blob/master/src/utils/default-handlers.js), 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](https://react-dnd.github.io/react-dnd/about) (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](https://github.com/bvaughn/react-virtualized/blob/master/docs/List.md#prop-types) | | 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`](https://github.com/frontend-collective/react-sortable-tree/blob/master/src/node-renderer-default.js)) 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`](https://github.com/frontend-collective/react-sortable-tree/blob/master/src/placeholder-renderer-default.js)) 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`](https://github.com/frontend-collective/react-sortable-tree/blob/master/src/utils/tree-data-utils.js). - **`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, treeIndex, and the treeData with that node removed. - **`removeNodeAtPath`**: For a given path, remove the node and return the treeData. - **`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. - **`getDescendantCount`**: Count how many descendants this node has. - **`getVisibleNodeCount`**: Count how many visible descendants this node has. - **`getVisibleNodeInfoAtIndex`**: Get the th visible node in the tree data. - **`toggleExpandedForAll`**: Expand or close every node in the tree. - **`getNodeAtPath`**: Get the node at the input path. - **`insertNode`**: Insert the input node at the specified depth and minimumTreeIndex. - **`find`**: Find nodes matching a search query in the tree. - **`isDescendant`**: Check if a node is a descendant of another node. - **`getDepth`**: Get the longest path in the tree. ## 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](https://user-images.githubusercontent.com/4413963/32144502-1df1ae08-bcfd-11e7-8f63-8b836dace1a4.png) | Full Node Drag 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](https://github.com/frontend-collective/react-sortable-tree-theme-file-explorer) \| [NPM](https://www.npmjs.com/package/react-sortable-tree-theme-file-explorer) | [Github](https://github.com/frontend-collective/react-sortable-tree-theme-full-node-drag) \| [NPM](https://www.npmjs.com/package/react-sortable-tree-theme-full-node-drag) | [Github](https://github.com/lifejuggler/react-sortable-tree-theme-minimal) \| [NPM](https://www.npmjs.com/package/react-sortable-tree-theme-minimal) | **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](https://github.com/frontend-collective/react-sortable-tree-theme-file-explorer) 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](https://github.com/facebookincubator/create-react-app/issues/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`. ```js // before import SortableTree from 'react-sortable-tree'; // after import { SortableTreeWithoutDndContext as SortableTree } from 'react-sortable-tree'; ``` ## Contributing Please read the [Code of Conduct](CODE_OF_CONDUCT.md). I actively welcome pull requests :) After cloning the repository and running `yarn install` inside, you can use the following commands to develop and build the project. ```sh # Starts a webpack dev server that hosts a demo page with the component. # It uses react-hot-loader so changes are reflected on save. yarn start # Start the storybook, which has several different examples to play with. # Also hot-reloaded. yarn run storybook # Runs the library tests yarn test # Lints the code with eslint yarn 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. yarn run build ``` Pull requests are welcome! ## License MIT

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