React Tree View - Hierarchical Data Structure

Use the following properties to bind the TreeView to hierarchical data:

items[]
Assigns a local array as done in this demo.
dataSource
Assigns a DataSource object that allows you to perform data shaping operations and use a remote source.

DevExtreme Accessibility Compliance

DevExtreme component libraries meet a variety of WCAG and Section 508 compliance standards. To assess this demo’s accessibility level, click the Run AXE^® Validation button to launch the AXE^® web accessibility evaluation tool.

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The overall accessibility level of your application depends on the TreeView features used.

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TS JS

Backend API

import React, { useCallback, useState } from 'react'; import TreeView, { TreeViewTypes } from 'devextreme-react/tree-view'; import service, { ProductType } from './data.ts'; const products = service.getProducts(); const App = () => { const [currentItem, setCurrentItem] = useState({ ...products[0] }); const selectItem = useCallback((e: TreeViewTypes.ItemClickEvent & { itemData?: ProductType; }) => { setCurrentItem({ ...e.itemData }); }, [setCurrentItem]); return ( <div className="form"> <TreeView id="simple-treeview" items={products} width={300} onItemClick={selectItem} /> {currentItem.price && <div id="product-details"> <img src={currentItem.image} /> <div className="name">{currentItem.text}</div> <div className="price">{`$${currentItem.price}`}</div> </div> } </div> ); }; export default App;

import React, { useCallback, useState } from 'react'; import TreeView from 'devextreme-react/tree-view'; import service from './data.js'; const products = service.getProducts(); const App = () => { const [currentItem, setCurrentItem] = useState({ ...products[0] }); const selectItem = useCallback( (e) => { setCurrentItem({ ...e.itemData }); }, [setCurrentItem], ); return ( <div className="form"> <TreeView id="simple-treeview" items={products} width={300} onItemClick={selectItem} /> {currentItem.price && ( <div id="product-details"> <img src={currentItem.image} /> <div className="name">{currentItem.text}</div> <div className="price">{`$${currentItem.price}`}</div> </div> )} </div> ); }; export default App;

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render(<App />, document.getElementById('app'));

<!DOCTYPE html> <html lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.7/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.tsx"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>

#simple-treeview, #product-details { display: inline-block; } #product-details { vertical-align: top; width: 400px; height: 420px; margin-left: 20px; } #product-details > img { border: none; height: 300px; width: 400px; } #product-details > .name { text-align: center; font-size: 20px; } #product-details > .price { text-align: center; font-size: 24px; } .dark #product-details > div { color: #f0f0f0; } .hidden { visibility: hidden; }

Each object in the TreeView's hierarchical data structure should include the following fields:

id
Unique item identifier.
text
Text displayed by the item.
items
Nested objects (optional).

You can respectively use the keyExpr, displayExpr, and itemsExpr properties to specify custom names for the above-mentioned fields. Node objects can also include developer-defined fields and properties from this help section: items[].

In this demo, nodes use the expanded property, which specifies whether a node is collapsed or expanded. They also include the developer-defined price and image fields.

To get started with the DevExtreme TreeView component, refer to the following tutorial for step-by-step instructions: Getting Started with TreeView.