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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.

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.

Backend API
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$(() => { $('#simple-treeview').dxTreeView({ items: products, width: 300, onItemClick(e) { const item = e.itemData; if (item.price) { $('#product-details').removeClass('hidden'); $('#product-details > img').attr('src', item.image); $('#product-details > .price').text(`$${item.price}`); $('#product-details > .name').text(item.text); } else { $('#product-details').addClass('hidden'); } }, }).dxTreeView('instance'); });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <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=1.0" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/21.2.3/js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div class="form"> <div id="simple-treeview"></div> <div id="product-details" class="hidden"> <img src="" /> <div class="name"></div> <div class="price"></div> </div> </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; }
const products = [{ id: '1', text: 'Stores', expanded: true, items: [{ id: '1_1', text: 'Super Mart of the West', expanded: true, items: [{ id: '1_1_1', text: 'Video Players', items: [{ id: '1_1_1_1', text: 'HD Video Player', price: 220, image: '../../../../images/products/1.png', }, { id: '1_1_1_2', text: 'SuperHD Video Player', image: '../../../../images/products/2.png', price: 270, }], }, { id: '1_1_2', text: 'Televisions', expanded: true, items: [{ id: '1_1_2_1', text: 'SuperLCD 42', image: '../../../../images/products/7.png', price: 1200, }, { id: '1_1_2_2', text: 'SuperLED 42', image: '../../../../images/products/5.png', price: 1450, }, { id: '1_1_2_3', text: 'SuperLED 50', image: '../../../../images/products/4.png', price: 1600, }, { id: '1_1_2_4', text: 'SuperLCD 55', image: '../../../../images/products/6.png', price: 1350, }, { id: '1_1_2_5', text: 'SuperLCD 70', image: '../../../../images/products/9.png', price: 4000, }], }, { id: '1_1_3', text: 'Monitors', expanded: true, items: [{ id: '1_1_3_1', text: '19"', expanded: true, items: [{ id: '1_1_3_1_1', text: 'DesktopLCD 19', image: '../../../../images/products/10.png', price: 160, }], }, { id: '1_1_3_2', text: '21"', items: [{ id: '1_1_3_2_1', text: 'DesktopLCD 21', image: '../../../../images/products/12.png', price: 170, }, { id: '1_1_3_2_2', text: 'DesktopLED 21', image: '../../../../images/products/13.png', price: 175, }], }], }, { id: '1_1_4', text: 'Projectors', items: [{ id: '1_1_4_1', text: 'Projector Plus', image: '../../../../images/products/14.png', price: 550, }, { id: '1_1_4_2', text: 'Projector PlusHD', image: '../../../../images/products/15.png', price: 750, }], }], }, { id: '1_2', text: 'Braeburn', items: [{ id: '1_2_1', text: 'Video Players', items: [{ id: '1_2_1_1', text: 'HD Video Player', image: '../../../../images/products/1.png', price: 240, }, { id: '1_2_1_2', text: 'SuperHD Video Player', image: '../../../../images/products/2.png', price: 300, }], }, { id: '1_2_2', text: 'Televisions', items: [{ id: '1_2_2_1', text: 'SuperPlasma 50', image: '../../../../images/products/3.png', price: 1800, }, { id: '1_2_2_2', text: 'SuperPlasma 65', image: '../../../../images/products/8.png', price: 3500, }], }, { id: '1_2_3', text: 'Monitors', items: [{ id: '1_2_3_1', text: '19"', items: [{ id: '1_2_3_1_1', text: 'DesktopLCD 19', image: '../../../../images/products/10.png', price: 170, }], }, { id: '1_2_3_2', text: '21"', items: [{ id: '1_2_3_2_1', text: 'DesktopLCD 21', image: '../../../../images/products/12.png', price: 180, }, { id: '1_2_3_2_2', text: 'DesktopLED 21', image: '../../../../images/products/13.png', price: 190, }], }], }], }, { id: '1_3', text: 'E-Mart', items: [{ id: '1_3_1', text: 'Video Players', items: [{ id: '1_3_1_1', text: 'HD Video Player', image: '../../../../images/products/1.png', price: 220, }, { id: '1_3_1_2', text: 'SuperHD Video Player', image: '../../../../images/products/2.png', price: 275, }], }, { id: '1_3_3', text: 'Monitors', items: [{ id: '1_3_3_1', text: '19"', items: [{ id: '1_3_3_1_1', text: 'DesktopLCD 19', image: '../../../../images/products/10.png', price: 165, }], }, { id: '1_3_3_2', text: '21"', items: [{ id: '1_3_3_2_1', text: 'DesktopLCD 21', image: '../../../../images/products/12.png', price: 175, }], }], }], }, { id: '1_4', text: 'Walters', items: [{ id: '1_4_1', text: 'Video Players', items: [{ id: '1_4_1_1', text: 'HD Video Player', image: '../../../../images/products/1.png', price: 210, }, { id: '1_4_1_2', text: 'SuperHD Video Player', image: '../../../../images/products/2.png', price: 250, }], }, { id: '1_4_2', text: 'Televisions', items: [{ id: '1_4_2_1', text: 'SuperLCD 42', image: '../../../../images/products/7.png', price: 1100, }, { id: '1_4_2_2', text: 'SuperLED 42', image: '../../../../images/products/5.png', price: 1400, }, { id: '1_4_2_3', text: 'SuperLED 50', image: '../../../../images/products/4.png', price: 1500, }, { id: '1_4_2_4', text: 'SuperLCD 55', image: '../../../../images/products/6.png', price: 1300, }, { id: '1_4_2_5', text: 'SuperLCD 70', image: '../../../../images/products/9.png', price: 4000, }, { id: '1_4_2_6', text: 'SuperPlasma 50', image: '../../../../images/products/3.png', price: 1700, }], }, { id: '1_4_3', text: 'Monitors', items: [{ id: '1_4_3_1', text: '19"', items: [{ id: '1_4_3_1_1', text: 'DesktopLCD 19', image: '../../../../images/products/10.png', price: 160, }], }, { id: '1_4_3_2', text: '21"', items: [{ id: '1_4_3_2_1', text: 'DesktopLCD 21', image: '../../../../images/products/12.png', price: 170, }, { id: '1_4_3_2_2', text: 'DesktopLED 21', image: '../../../../images/products/13.png', price: 180, }], }], }, { id: '1_4_4', text: 'Projectors', items: [{ id: '1_4_4_1', text: 'Projector Plus', image: '../../../../images/products/14.png', price: 550, }, { id: '1_4_4_2', text: 'Projector PlusHD', image: '../../../../images/products/15.png', price: 750, }], }], }], }];