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"
[dataSource]="products"
[inputAttr]="{ 'aria-label': 'Templated Product' }"
[value]="products[3].ID"
[fieldAddons]="{ beforeTemplate: 'before' }"
>
<div *dxTemplate="let data of 'before'">
<div class="custom-addon">
<img alt="Product name" src="{{ data && data.ImageSrc }}" />
</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($event)"
>
</dx-select-box>
</div>
</div>
<div class="current-value">
Selected product is <span>{{ selectBox.value }}</span>
</div>
</div>
import { bootstrapApplication } from '@angular/platform-browser';
import { Component, enableProdMode, provideZoneChangeDetection } from '@angular/core';
import notify from 'devextreme/ui/notify';
import { DxSelectBoxModule, DxTextBoxModule } from 'devextreme-angular';
import { ArrayStore } from 'devextreme-angular/common/data';
import { DxSelectBoxTypes } from 'devextreme-angular/ui/select-box';
import { Product, Service } from './app.service';
if (!/localhost/.test(document.location.host)) {
enableProdMode();
}
@Component({
selector: 'demo-app',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css'],
providers: [Service],
imports: [
DxSelectBoxModule,
DxTextBoxModule,
],
})
export class AppComponent {
simpleProducts: string[];
products: Product[];
data: ArrayStore;
constructor(service: Service) {
this.products = service.getProducts();
this.simpleProducts = service.getSimpleProducts();
this.data = new ArrayStore({
data: this.products,
key: 'ID',
});
}
onValueChanged({ value }: DxSelectBoxTypes.ValueChangedEvent) {
notify(`The value is changed to: "${value}"`);
}
}
bootstrapApplication(AppComponent, {
providers: [
provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }),
],
});
::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 .custom-addon {
padding-left: 8px;
display: flex;
align-items: center;
}
::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;
}
}
<!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/26.1.5/css/dx.light.css" />
</head>
<body class="dx-viewport">
<div class="demo-container">
<demo-app>Loading...</demo-app>
</div>
<script src="https://cdn.jsdelivr.net/npm/zone.js@0.16.2/bundles/zone.umd.js"></script>
<script src="./bundle.js" type="module"></script>
</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. - fieldAddons.beforeTemplate 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.