React D3 Tree

React D3 Tree is a React component that lets you represent hierarchical data (e.g. ancestor trees, organisational structure, package dependencies) as an animated & interactive tree graph by leveraging D3's tree layout.

Contents

• Demo
• Installation
• Usage
• Props
• Node shapes
• Styling
• External data sources
• Recipes

Demo

• Current release: https://bkrem.github.io/react-d3-tree/

Installation

To install via NPM, run:

npm i --save react-d3-tree

Or if Yarn is more your thing:

yarn add react-d3-tree

Usage

import React from 'react';
import Tree from 'react-d3-tree';

const myTreeData = [
  {
    name: 'Top Level',
    attributes: {
      keyA: 'val A',
      keyB: 'val B',
      keyC: 'val C',
    },
    children: [
      {
        name: 'Level 2: A',
        attributes: {
          keyA: 'val A',
          keyB: 'val B',
          keyC: 'val C',
        },
      },
      {
        name: 'Level 2: B',
      },
    ],
  },
];

class MyComponent extends React.Component {
  render() {
    return (
      {/* <Tree /> will fill width/height of its container; in this case `#treeWrapper` */}
      <div id="treeWrapper" style={{width: '50em', height: '20em'}}>

        <Tree data={myTreeData} />

      </div>
    );
  }
}

Props

| Property | Type | Options | Required? | Default | Description | |:------------------------|:-----------------------|:------------------------------------------------------------------------------|:----------|:--------------------------------------------------------------|:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | data | array | | required | undefined | Single-element array containing hierarchical object (see myTreeData above). Contains (at least) name and parent keys. | | nodeSvgShape | object | see Node shapes | | {shape: 'circle', shapeProps: r: 10} | Sets a specific SVG shape element + shapeProps to be used for each node. | | onClick | func | | | undefined | Callback function to be called when a node is clicked. The clicked node's data object is passed to the callback function. | | onMouseOver | func | | | undefined | Callback function to be called when mouse enters the space belonging to a node. The node's data object is passed to the callback. | | onMouseOut | func | | | undefined | Callback function to be called when mouse leaves the space belonging to a node. The node's data object is passed to the callback. | | orientation | string (enum) | horizontal vertical | | horizontal | horizontal - Tree expands left-to-right. vertical - Tree expands top-to-bottom. | | translate | object | | | {x: 0, y: 0} | Translates the graph along the x/y axis by the specified amount of pixels (avoids the graph being stuck in the top left canvas corner). | | pathFunc | string (enum)/func | diagonalelbowstraightcustomFunc(linkData, orientation) | | diagonal | diagonal - Smooth, curved edges between parent-child nodes. elbow - Sharp edges at right angles between parent-child nodes. straight - Straight lines between parent-child nodes. customFunc - Custom draw function that accepts linkData as its first param and orientation as its second. | | collapsible | bool | | | true | Toggles ability to collapse/expand the tree's nodes by clicking them. | | initialDepth | number | 0..n | | undefined | Sets the maximum node depth to which the tree is expanded on its initial render. Tree renders to full depth if prop is omitted. | | depthFactor | number | -n..0..n | | undefined | Ensures the tree takes up a fixed amount of space (node.y = node.depth * depthFactor), regardless of tree depth. TIP: Negative values invert the tree's direction. | | zoomable | bool | | | true | Toggles ability to zoom in/out on the Tree by scaling it according to props.scaleExtent. | | scaleExtent | object | {min: 0..n, max: 0..n} | | {min: 0.1, max: 1} | Sets the minimum/maximum extent to which the tree can be scaled if props.zoomable is true. | | nodeSize | object | {x: 0..n, y: 0..n} | | {x: 140, y: 140} | Sets a fixed size for each node. This does not affect node circle sizes, circle sizes are handled by the circleRadius prop. | | separation | object | {siblings: 0..n, nonSiblings: 0..n} | | {siblings: 1, nonSiblings: 2} | Sets separation between neighbouring nodes, differentiating between siblings (same parent) and non-siblings. | | transitionDuration | number | 0..n | | 500 | Sets the animation duration (in ms) of each expansion/collapse of a tree node. Set this to 0 to deactivate animations completely. | | textLayout | object | {textAnchor: enum, x: -n..0..n, y: -n..0..n, transform: string} | | {textAnchor: "start", x: 10, y: -10, transform: undefined } | Configures the positioning of each node's text (name & attributes) relative to the node itself.textAnchor enums mirror the text-anchor spec.x & y accept integers denoting px values. transform mirrors the svg transform spec. | | styles | object | see Styling | | Node/Link CSS files | Overrides and/or enhances the tree's default styling. | | circleRadius (legacy) | number | 0..n | | undefined | Sets the radius of each node's <circle> element. Will be deprecated in v2, please use nodeSvgShape instead. |

Node shapes

The nodeSvgShape prop allows specifying any SVG shape primitive to describe how the tree's nodes should be shaped.

Note: nodeSvgShape and circleRadius are mutually exclusive props. nodeSvgShape will be used unless the legacy circleRadius is specified.

For example, assuming we want to use squares instead of the default circles, we can do:

const svgSquare = {
  shape: 'rect',
  shapeProps: {
    width: 20,
    height: 20,
    x: -10,
    y: -10,
  }
}

// ...

<Tree data={myTreeData} nodeSvgShape={svgSquare}>

Overridable shapeProps

shapeProps is currently merged with node.circle/leafNode.circle (see Styling).

This means any properties passed in shapeProps will be overridden by properties with the same key in the node.circle/leafNode.circle style props.
This is to prevent breaking the legacy usage of circleRadius + styling via node/leafNode properties until it is deprecated fully in v2.

From v1.5.x onwards, it is therefore recommended to pass all node styling properties through shapeProps.

Styling

The tree's styles prop may be used to override any of the tree's default styling. The following object shape is expected by styles:

{
  links: <svgStyleObject>,
  nodes: {
    node: {
      circle: <svgStyleObject>,
      name: <svgStyleObject>,
      attributes: <svgStyleObject>,
    },
    leafNode: {
      circle: <svgStyleObject>,
      name: <svgStyleObject>,
      attributes: <svgStyleObject>,
    },
  },
}

where <svgStyleObject> is any object containing CSS-like properties that are compatible with an <svg> element's style attribute, for example:

{
  stroke: 'blue',
  strokeWidth: 3,
}

For more information on the SVG style attribute, check this out.

External data sources

Statically hosted JSON or CSV files can be used as data sources via the additional treeUtil module.

Example

import React from 'react';
import { Tree, treeUtil } from 'react-d3-tree';

const csvSource = 'https://raw.githubusercontent.com/bkrem/react-d3-tree/master/docs/examples/data/csv-example.csv';

constructor() {
  super();

  this.state = {
    data: undefined,
  };
}

componentWillMount() {
  treeUtil.parseCSV(csvSource)
  .then((data) => {
    this.setState({ data })
  })
  .catch((err) => console.error(err));
}

class MyComponent extends React.Component {
  render() {
    return (
      {/* <Tree /> will fill width/height of its container; in this case `#treeWrapper` */}
      <div id="treeWrapper" style={{width: '50em', height: '20em'}}>

        <Tree data={this.state.data} />

      </div>
    );
  }
}

For details regarding the treeUtil module, please check the module's API docs.
For examples of each data type that can be parsed with treeUtil, please check the data source examples.

Recipes

• Auto-centering inside treeContainer