React D3 Tree

👾 Playground

📖 API Documentation (v3)

React D3 Tree is a [React](http://facebook.github.io/react/) component that lets you represent hierarchical data (e.g. family trees, org charts, file directories) as an interactive tree graph with minimal setup, by leveraging [D3](https://d3js.org/)'s `tree` layout. > **Upgrading from v1? Check out the [v2 release notes](https://github.com/bkrem/react-d3-tree/releases/tag/v2.0.0).** > **[Legacy v1 docs](https://github.com/bkrem/react-d3-tree/tree/v1)** ## Contents - [Installation](#installation) - [Usage](#usage) - [Props](#props) - [Working with the default Tree](#working-with-the-default-tree) - [Providing `data`](#providing-data) - [Styling Nodes](#styling-nodes) - [Styling Links](#styling-links) - [Event Handlers](#event-handlers) - [Customizing the Tree](#customizing-the-tree) - [`renderCustomNodeElement`](#rendercustomnodeelement) - [`pathFunc`](#pathfunc) - [Providing your own `pathFunc`](#providing-your-own-pathfunc) - [Development](#development) - [Setup](#setup) - [Hot reloading](#hot-reloading) - [Contributors](#contributors) ## Installation ```bash npm i --save react-d3-tree ``` ## Usage ```jsx import React from 'react'; import Tree from 'react-d3-tree'; // This is a simplified example of an org chart with a depth of 2. // Note how deeper levels are defined recursively via the `children` property. const orgChart = { name: 'CEO', children: [ { name: 'Manager', attributes: { department: 'Production', }, children: [ { name: 'Foreman', attributes: { department: 'Fabrication', }, children: [ { name: 'Worker', }, ], }, { name: 'Foreman', attributes: { department: 'Assembly', }, children: [ { name: 'Worker', }, ], }, ], }, ], }; export default function OrgChartTree() { return ( // `` will fill width/height of its container; in this case `#treeWrapper`.

); } ``` ## Props For details on all props accepted by `Tree`, check out the [TreeProps reference docs](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html). The only required prop is [data](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html#data), all other props on `Tree` are optional/pre-defined (see "Default value" on each prop definition). ## Working with the default Tree `react-d3-tree` provides default implementations for `Tree`'s nodes & links, which are intended to get you up & running with a working tree quickly. This section is focused on explaining **how to provide data, styles and event handlers for the default `Tree` implementation**. > Need more fine-grained control over how nodes & links appear/behave? Check out the [Customizing the Tree](#customizing-the-tree) section below. ### Providing `data` By default, `Tree` expects each node object in `data` to implement the [`RawNodeDatum` interface](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_types_common_.rawnodedatum.html): ```ts interface RawNodeDatum { name: string; attributes?: Record; children?: RawNodeDatum[]; } ``` The `orgChart` example in the [Usage](#usage) section above is an example of this: - Every node has at least a `name`. This is rendered as the **node's primary label**. - Some nodes have `attributes` defined (the `CEO` node does not). **The key-value pairs in `attributes` are rendered as a list of secondary labels**. - Nodes can have further `RawNodeDatum` objects nested inside them via the `children` key, creating a hierarchy from which the tree graph can be generated. ### Styling Nodes `Tree` provides the following props to style different types of nodes, all of which use an SVG `circle` by default: - `rootNodeClassName` - applied to the root node. - `branchNodeClassName` - applied to any node with 1+ children. - `leafNodeClassName` - applied to any node without children. To visually distinguish these three types of nodes from each other by color, we could provide each with their own class: ```css /* custom-tree.css */ .node__root > circle { fill: red; } .node__branch > circle { fill: yellow; } .node__leaf > circle { fill: green; /* Let's also make the radius of leaf nodes larger */ r: 40; } ``` ```jsx import React from 'react'; import Tree from 'react-d3-tree'; import './custom-tree.css'; // ... export default function StyledNodesTree() { return (

); } ``` > For more details on the `className` props for nodes, see the [TreeProps reference docs](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html). ### Styling Links `Tree` provides the `pathClassFunc` property to pass additional classNames to every link to be rendered. Each link calls `pathClassFunc` with its own `TreeLinkDatum` and the tree's current `orientation`. `Tree` expects `pathClassFunc` to return a `className` string. ```jsx function StyledLinksTree() { const getDynamicPathClass = ({ source, target }, orientation) => { if (!target.children) { // Target node has no children -> this link leads to a leaf node. return 'link__to-leaf'; } // Style it as a link connecting two branch nodes by default. return 'link__to-branch'; }; return ( 'custom-link'} // Want to apply multiple static classes? `Array.join` is your friend :) pathClassFunc={() => ['custom-link', 'extra-custom-link'].join(' ')} // Dynamically determine which `className` to pass based on the link's properties. pathClassFunc={getDynamicPathClass} /> ); } ``` > For more details, see the `PathClassFunction` [reference docs](https://bkrem.github.io/react-d3-tree/docs/modules/_src_types_common_.html#pathclassfunction). ### Event Handlers `Tree` exposes the following event handler callbacks by default: - [onLinkClick](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html#onlinkclick) - [onLinkMouseOut](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html#onlinkmouseout) - [onLinkMouseOver](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src__tree_types_.treeprops.html#onlinkmouseover) - [onNodeClick](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html#onnodeclick) - [onNodeMouseOut](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html#onnodemouseout) - [onNodeMouseOver](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html#onnodemouseover) > **Note:** Nodes are expanded/collapsed whenever `onNodeClick` fires. To prevent this, set the [`collapsible` prop](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html#collapsible) to `false`. > `onNodeClick` will still fire, but it will not change the target node's expanded/collapsed state. ## Customizing the Tree ### `renderCustomNodeElement` The [`renderCustomNodeElement` prop](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html#rendercustomnodeelement) accepts a **custom render function that will be used for every node in the tree.** Cases where you may find rendering your own `Node` element useful include: - Using a **different SVG tag for your nodes** (instead of the default ``) - [Example (codesandbox.io)](https://codesandbox.io/s/rd3t-v2-custom-svg-tag-1bq1e?file=/src/App.js) - Gaining **fine-grained control over event handling** (e.g. to implement events not covered by the default API) - [Example (codesandbox.io)](https://codesandbox.io/s/rd3t-v2-custom-event-handlers-5pwxw?file=/src/App.js) - Building **richer & more complex nodes/labels** by leveraging the `foreignObject` tag to render HTML inside the SVG namespace - [Example (codesandbox.io)](https://codesandbox.io/s/rd3t-v2-custom-with-foreignobject-0mfj8?file=/src/App.js) ### `pathFunc` The [`pathFunc` prop](https://bkrem.github.io/react-d3-tree/docs/interfaces/_src_tree_types_.treeprops.html#pathfunc) accepts a predefined `PathFunctionOption` enum or a user-defined `PathFunction`. By changing or providing your own `pathFunc`, you are able to change how links between nodes of the tree (which are SVG `path` tags under the hood) are drawn. The currently [available enums](https://bkrem.github.io/react-d3-tree/docs/modules/_src_types_common_.html#pathfunctionoption) are: - `diagonal` (default) - `elbow` - `straight` - `step` > Want to see how each option looks? [Try them out on the playground](https://bkrem.github.io/react-d3-tree). #### Providing your own `pathFunc` If none of the available path functions suit your needs, you're also able to provide a custom `PathFunction`: ```jsx function CustomPathFuncTree() { const straightPathFunc = (linkDatum, orientation) => { const { source, target } = linkDatum; return orientation === 'horizontal' ? `M${source.y},${source.x}L${target.y},${target.x}` : `M${source.x},${source.y}L${target.x},${target.y}`; }; return ( ); } ``` > For more details, see the [`PathFunction` reference docs](https://bkrem.github.io/react-d3-tree/docs/modules/_types_common_.html#pathfunction). ## Development ### Setup To set up `react-d3-tree` for local development, clone the repo and follow the steps below: ```bash # 1. Set up the library, create a reference to it for symlinking. cd react-d3-tree npm i npm link # 2. Set up the demo/playground, symlink to the local copy of `react-d3-tree`. cd demo npm i npm link react-d3-tree ``` > **Tip:** If you'd prefer to use your own app for development instead of the demo, simply run `npm link react-d3-tree` in your app's root folder instead of the demo's :) ### Hot reloading ```bash npm run build:watch ``` If you're using `react-d3-tree/demo` for development, open up another terminal window in the `demo` directory and call: ```bash npm start ``` ## Contributors A huge thank you to all the [contributors](https://github.com/bkrem/react-d3-tree/graphs/contributors), as well as users who have opened issues with thoughtful suggestions and feedback.

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