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Overview

The SelectBox component allows users to select an item from a drop-down list.

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 SelectBox features used.
Backend API
<div class="dx-fieldset"> <div class="dx-field"> <div class="dx-field-label">Default mode</div> <div class="dx-field-value"> <dx-select-box [items]="simpleProducts" [inputAttr]="{ 'aria-label': 'Simple Product' }" ></dx-select-box> </div> </div> <div class="dx-field"> <div class="dx-field-label">With a custom placeholder</div> <div class="dx-field-value"> <dx-select-box placeholder="Choose Product" [items]="simpleProducts" [inputAttr]="{ 'aria-label': 'Product With Placeholder' }" [showClearButton]="true" ></dx-select-box> </div> </div> <div class="dx-field"> <div class="dx-field-label">Read only</div> <div class="dx-field-value"> <dx-select-box [items]="simpleProducts" [inputAttr]="{ 'aria-label': 'ReadOnly Product' }" [value]="simpleProducts[0]" [readOnly]="true" ></dx-select-box> </div> </div> <div class="dx-field"> <div class="dx-field-label">Disabled</div> <div class="dx-field-value"> <dx-select-box [items]="simpleProducts" [inputAttr]="{ 'aria-label': 'Disabled Product' }" [value]="simpleProducts[0]" [disabled]="true" ></dx-select-box> </div> </div> <div class="dx-field"> <div class="dx-field-label">Data source usage</div> <div class="dx-field-value"> <dx-select-box displayExpr="Name" valueExpr="ID" [dataSource]="data" [inputAttr]="{ 'aria-label': 'Product ID' }" [value]="products[0].ID" ></dx-select-box> </div> </div> <div class="dx-field"> <div class="dx-field-label">Custom templates</div> <div class="dx-field-value"> <dx-select-box id="custom-templates" displayExpr="Name" valueExpr="ID" fieldTemplate="field" [dataSource]="products" [inputAttr]="{ 'aria-label': 'Templated Product' }" [value]="products[3].ID" > <div *dxTemplate="let data of 'field'"> <div class="custom-item"> <img alt="Product name" src="{{ data && data.ImageSrc }}" /> <dx-text-box class="product-name" [value]="data && data.Name" [inputAttr]="{ 'aria-label': 'Name' }" [readOnly]="true" ></dx-text-box> </div> </div> <div *dxTemplate="let data of 'item'"> <div class="custom-item"> <img alt="Product name" src="{{ data.ImageSrc }}" /> <div class="product-name"> {{ data.Name }} </div> </div> </div> </dx-select-box> </div> </div> </div> <div class="dx-fieldset"> <div class="dx-fieldset-header">Event Handling</div> <div class="dx-field"> <div class="dx-field-label">Product</div> <div class="dx-field-value"> <dx-select-box #selectBox [items]="simpleProducts" [inputAttr]="{ 'aria-label': 'Product' }" [value]="simpleProducts[0]" (onValueChanged)="onValueChanged($event)" > </dx-select-box> </div> </div> <div class="current-value"> Selected product is <span>{{ selectBox.value }}</span> </div> </div>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import notify from 'devextreme/ui/notify'; import { DxSelectBoxModule, DxTextBoxModule, DxTemplateModule } from 'devextreme-angular'; import ArrayStore from 'devextreme/data/array_store'; import { DxSelectBoxTypes } from 'devextreme-angular/ui/select-box'; import { Product, Service } from './app.service'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [Service], }) export class AppComponent { simpleProducts: string[]; products: Product[]; data: ArrayStore; constructor(service: Service) { this.products = service.getProducts(); this.simpleProducts = service.getSimpleProducts(); this.data = new ArrayStore({ data: this.products, key: 'ID', }); } onValueChanged({ value }: DxSelectBoxTypes.ValueChangedEvent) { notify(`The value is changed to: "${value}"`); } } @NgModule({ imports: [ BrowserModule, DxSelectBoxModule, DxTextBoxModule, DxTemplateModule, ], declarations: [AppComponent], bootstrap: [AppComponent], }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep .dx-dropdownlist-popup-wrapper .dx-list:not(.dx-list-select-decorator-enabled) .dx-list-item-content { padding-left: 7px; padding-right: 7px; } ::ng-deep .custom-item { position: relative; min-height: 30px; } ::ng-deep .dx-dropdowneditor-input-wrapper .custom-item > img { padding-left: 8px; } ::ng-deep .custom-item .product-name { display: inline-block; padding-left: 50px; text-indent: 0; line-height: 30px; font-size: 15px; width: 100%; } ::ng-deep .custom-item > img { left: 1px; position: absolute; top: 50%; margin-top: -15px; } ::ng-deep .dx-theme-material #custom-templates .dx-texteditor-buttons-container { display: none; } ::ng-deep .current-value { padding: 10px 0; } ::ng-deep .current-value > span { font-weight: bold; } ::ng-deep .dx-theme-material .dx-selectbox-container .product-name { padding-left: 58px; }
import { Injectable } from '@angular/core'; export class Product { ID: number; Name: string; Price: number; Current_Inventory: number; Backorder: number; Manufacturing: number; Category: string; ImageSrc: string; } const simpleProducts: string[] = [ 'HD Video Player', 'SuperHD Video Player', 'SuperPlasma 50', 'SuperLED 50', 'SuperLED 42', 'SuperLCD 55', 'SuperLCD 42', 'SuperPlasma 65', 'SuperLCD 70', 'Projector Plus', 'Projector PlusHT', 'ExcelRemote IR', 'ExcelRemote BT', 'ExcelRemote IP', ]; const products: Product[] = [{ ID: 1, Name: 'HD Video Player', Price: 330, Current_Inventory: 225, Backorder: 0, Manufacturing: 10, Category: 'Video Players', ImageSrc: '../../../../images/products/1-small.png', }, { ID: 2, Name: 'SuperHD Player', Price: 400, Current_Inventory: 150, Backorder: 0, Manufacturing: 25, Category: 'Video Players', ImageSrc: '../../../../images/products/2-small.png', }, { ID: 3, Name: 'SuperPlasma 50', Price: 2400, Current_Inventory: 0, Backorder: 0, Manufacturing: 0, Category: 'Televisions', ImageSrc: '../../../../images/products/3-small.png', }, { ID: 4, Name: 'SuperLED 50', Price: 1600, Current_Inventory: 77, Backorder: 0, Manufacturing: 55, Category: 'Televisions', ImageSrc: '../../../../images/products/4-small.png', }, { ID: 5, Name: 'SuperLED 42', Price: 1450, Current_Inventory: 445, Backorder: 0, Manufacturing: 0, Category: 'Televisions', ImageSrc: '../../../../images/products/5-small.png', }, { ID: 6, Name: 'SuperLCD 55', Price: 1350, Current_Inventory: 345, Backorder: 0, Manufacturing: 5, Category: 'Televisions', ImageSrc: '../../../../images/products/6-small.png', }, { ID: 7, Name: 'SuperLCD 42', Price: 1200, Current_Inventory: 210, Backorder: 0, Manufacturing: 20, Category: 'Televisions', ImageSrc: '../../../../images/products/7-small.png', }, { ID: 8, Name: 'SuperPlasma 65', Price: 3500, Current_Inventory: 0, Backorder: 0, Manufacturing: 0, Category: 'Televisions', ImageSrc: '../../../../images/products/8-small.png', }, { ID: 9, Name: 'SuperLCD 70', Price: 4000, Current_Inventory: 95, Backorder: 0, Manufacturing: 5, Category: 'Televisions', ImageSrc: '../../../../images/products/9-small.png', }, { ID: 10, Name: 'DesktopLED 21', Price: 175, Current_Inventory: 0, Backorder: 425, Manufacturing: 75, Category: 'Monitors', ImageSrc: '../../../../images/products/10-small.png', }, { ID: 11, Name: 'DesktopLED 19', Price: 165, Current_Inventory: 425, Backorder: 0, Manufacturing: 110, Category: 'Monitors', ImageSrc: '../../../../images/products/11-small.png', }, { ID: 12, Name: 'DesktopLCD 21', Price: 170, Current_Inventory: 210, Backorder: 0, Manufacturing: 60, Category: 'Monitors', ImageSrc: '../../../../images/products/12-small.png', }, { ID: 13, Name: 'DesktopLCD 19', Price: 160, Current_Inventory: 150, Backorder: 0, Manufacturing: 210, Category: 'Monitors', ImageSrc: '../../../../images/products/13-small.png', }, { ID: 14, Name: 'Projector Plus', Price: 550, Current_Inventory: 0, Backorder: 55, Manufacturing: 10, Category: 'Projectors', ImageSrc: '../../../../images/products/14-small.png', }, { ID: 15, Name: 'Projector PlusHD', Price: 750, Current_Inventory: 110, Backorder: 0, Manufacturing: 90, Category: 'Projectors', ImageSrc: '../../../../images/products/15-small.png', }, { ID: 16, Name: 'Projector PlusHT', Price: 1050, Current_Inventory: 0, Backorder: 75, Manufacturing: 57, Category: 'Projectors', ImageSrc: '../../../../images/products/16-small.png', }, { ID: 17, Name: 'ExcelRemote IR', Price: 150, Current_Inventory: 650, Backorder: 0, Manufacturing: 190, Category: 'Automation', ImageSrc: '../../../../images/products/17-small.png', }, { ID: 18, Name: 'ExcelRemote BT', Price: 180, Current_Inventory: 310, Backorder: 0, Manufacturing: 0, Category: 'Automation', ImageSrc: '../../../../images/products/18-small.png', }, { ID: 19, Name: 'ExcelRemote IP', Price: 200, Current_Inventory: 0, Backorder: 325, Manufacturing: 225, Category: 'Automation', ImageSrc: '../../../../images/products/19-small.png', }]; @Injectable() export class Service { getSimpleProducts(): string[] { return simpleProducts; } getProducts(): Product[] { return products; } }
// In real applications, you should not transpile code in the browser. // You can see how to create your own application with Angular and DevExtreme here: // https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/ const componentNames = [ 'accordion', 'action-sheet', 'autocomplete', 'bar-gauge', 'box', 'bullet', 'button-group', 'button', 'calendar', 'chart', 'check-box', 'circular-gauge', 'color-box', 'context-menu', 'data-grid', 'date-box', 'date-range-box', 'defer-rendering', 'diagram', 'draggable', 'drawer', 'drop-down-box', 'drop-down-button', 'file-manager', 'file-uploader', 'filter-builder', 'form', 'funnel', 'gallery', 'gantt', 'html-editor', 'linear-gauge', 'list', 'load-indicator', 'load-panel', 'lookup', 'map', 'menu', 'multi-view', 'nested', 'number-box', 'pie-chart', 'pivot-grid-field-chooser', 'pivot-grid', 'polar-chart', 'popover', 'popup', 'progress-bar', 'radio-group', 'range-selector', 'range-slider', 'recurrence-editor', 'resizable', 'responsive-box', 'sankey', 'scheduler', 'scroll-view', 'select-box', 'slider', 'sortable', 'sparkline', 'speed-dial-action', 'splitter', 'switch', 'tab-panel', 'tabs', 'tag-box', 'text-area', 'text-box', 'tile-view', 'toast', 'toolbar', 'tooltip', 'tree-list', 'tree-map', 'tree-view', 'validation-group', 'validation-summary', 'validator', 'vector-map', ]; window.exports = window.exports || {}; window.config = { transpiler: 'ts', typescriptOptions: { module: 'system', emitDecoratorMetadata: true, experimentalDecorators: true, }, meta: { 'typescript': { 'exports': 'ts', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, '@angular/platform-browser-dynamic': { 'esModule': true, }, '@angular/platform-browser': { 'esModule': true, }, '@angular/core': { 'esModule': true, }, '@angular/common': { 'esModule': true, }, '@angular/common/http': { 'esModule': true, }, '@angular/animations': { 'esModule': true, }, '@angular/forms': { 'esModule': true, }, }, paths: { 'npm:': 'https://unpkg.com/', 'bundles:': '../../../../bundles/', }, map: { 'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js', 'typescript': 'npm:typescript@4.2.4/lib/typescript.js', /* @angular */ '@angular/compiler': 'bundles:@angular/compiler.umd.js', '@angular/platform-browser-dynamic': 'bundles:@angular/platform-browser-dynamic.umd.js', '@angular/core': 'bundles:@angular/core.umd.js', '@angular/core/primitives/signals': 'bundles:@angular/core.primitives.signals.umd.js', '@angular/common': 'bundles:@angular/common.umd.js', '@angular/common/http': 'bundles:@angular/common-http.umd.js', '@angular/platform-browser': 'bundles:@angular/platform-browser.umd.js', '@angular/platform-browser/animations': 'bundles:@angular/platform-browser.umd.js', '@angular/forms': 'bundles:@angular/forms.umd.js', /* devextreme */ 'devextreme': 'npm:devextreme@24.1.3/cjs', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13', 'devextreme/bundles/dx.all': 'npm:devextreme@24.1.3/bundles/dx.all.js', 'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.8', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.56', /* devextreme-angular umd maps */ 'devextreme-angular': 'bundles:devextreme-angular/devextreme-angular.umd.js', 'devextreme-angular/core': 'bundles:devextreme-angular/devextreme-angular-core.umd.js', ...componentNames.reduce((acc, name) => { acc[`devextreme-angular/ui/${name}`] = `bundles:devextreme-angular/devextreme-angular-ui-${name}.umd.js`; return acc; }, {}), 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'tslib': 'npm:tslib@2.6.1/tslib.js', 'rxjs': 'npm:rxjs@7.5.3/dist/bundles/rxjs.umd.js', 'rxjs/operators': 'npm:rxjs@7.5.3/dist/cjs/operators/index.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.8/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js', }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts', }, 'devextreme': { defaultExtension: 'js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, 'rxjs': { defaultExtension: 'js', }, 'rxjs/operators': { defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.13/inferno/package.json', 'npm:rxjs@7.5.3/package.json', 'npm:rxjs@7.5.3/operators/package.json', 'npm:devexpress-diagram@2.2.8/package.json', 'npm:devexpress-gantt@4.1.56/package.json', ], }; System.config(window.config); // System.import('@angular/compiler').catch(console.error.bind(console));
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" 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/24.1.3/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.13.0/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.13/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script src="config.js"></script> <script> System.import("app").catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>

This demo illustrates the following SelectBox properties:

  • items
    Specifies an array of items displayed in the SelectBox.
  • placeholder
    Specifies the text that is displayed when no items are selected.
  • readOnly
    Prevents users from changing the editor's value via the UI.
  • disabled
    Specifies whether the SelectBox responds to user interaction.
  • dataSource
    Binds the SelectBox to data. Unlike the items property, dataSource accepts the DataSource object that allows users to sort, filter, group, and shape data.
  • fieldTemplate and itemTemplate
    Allow you to customize the text field and drop-down list items.
  • onValueChanged event handler
    Use this function to perform an action when a user chooses a new value. In this demo, this function is used to display the selected value.

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