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 TagBox features used.
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If you have technical questions, please create a support ticket in the DevExpress Support Center.
Backend API
<div>
<div class="dx-fieldset">
<div class="dx-field">
<div class="dx-field-label">Default mode</div>
<div class="dx-field-value">
<dx-tag-box
[items]="simpleProducts"
[inputAttr]="{ 'aria-label': 'Product' }"
></dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Search mode</div>
<div class="dx-field-value">
<dx-tag-box
[items]="simpleProducts"
[searchEnabled]="true"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Batch selection</div>
<div class="dx-field-value">
<dx-tag-box
[items]="simpleProducts"
[showSelectionControls]="true"
applyValueMode="useButtons"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Hide selected items</div>
<div class="dx-field-value">
<dx-tag-box
[items]="simpleProducts"
[hideSelectedItems]="true"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Single line mode</div>
<div class="dx-field-value">
<dx-tag-box
[items]="simpleProducts"
[multiline]="false"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Add custom items</div>
<div class="dx-field-value">
<dx-tag-box
[items]="editableProducts"
[acceptCustomValue]="true"
(onCustomItemCreating)="onCustomItemCreating($event)"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">With custom placeholder</div>
<div class="dx-field-value">
<dx-tag-box
[items]="simpleProducts"
placeholder="Choose Product..."
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Disabled</div>
<div class="dx-field-value">
<dx-tag-box
[items]="simpleProducts"
[value]="[simpleProducts[0]]"
[disabled]="true"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Data source</div>
<div class="dx-field-value">
<dx-tag-box
[dataSource]="dataSource"
displayExpr="Name"
valueExpr="Id"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Custom template</div>
<div class="dx-field-value">
<dx-tag-box
[dataSource]="dataSource"
[value]="value"
displayExpr="Name"
valueExpr="Id"
itemTemplate="customItem"
tagTemplate="customTag"
[inputAttr]="{ 'aria-label': 'Product' }"
>
<div *dxTemplate="let product of 'customItem'">
<div class="custom-item">
<img [src]="product.ImageSrc" [alt]="getAltText(product.Name)" />
<div class="product-name">
{{ product.Name }}
</div>
</div>
</div>
<div *dxTemplate="let product of 'customTag'">
<div
[ngClass]="{
'dx-tag-content': true,
'disabled-tag': isDisabled(product)
}"
[attr.aria-disabled]="isDisabled(product)"
(mouseenter)="onMouseEnter($event, product)"
(mouseleave)="onMouseLeave()"
>
<img
[src]="product.ImageSrc"
[alt]="getAltText(product.Name)"
class="tag-img"
/>
<span>{{ product.Name }}</span>
<div
*ngIf="!isDisabled(product)"
class="dx-tag-remove-button"
></div>
</div>
</div>
</dx-tag-box>
<dx-popover [target]="target" [visible]="visible">
<div *dxTemplate="let data of 'content'">
<p>
<b>Name: </b><span>{{ product.Name }}</span>
</p>
<p>
<b>Price: </b><span>{{ product.Price }}</span>
</p>
<p>
<b>In-stock: </b><span>{{ product.Current_Inventory }}</span>
</p>
<p>
<b>Category: </b><span>{{ product.Category }}</span>
</p>
</div>
</dx-popover>
</div>
</div>
</div>
</div>
import { Component, NgModule, enableProdMode } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxTagBoxModule, DxPopoverModule, DxTemplateModule } from 'devextreme-angular';
import ArrayStore from 'devextreme/data/array_store';
import { DxTagBoxTypes } from 'devextreme-angular/ui/tag-box';
import { Service, Product } from './app.service';
if (!document.location.host.includes('localhost')) {
enableProdMode();
}
@Component({
selector: 'demo-app',
providers: [Service],
templateUrl: `app/app.component.html`,
styleUrls: [`app/app.component.css`],
})
export class AppComponent {
simpleProducts: string[];
editableProducts: string[];
dataSource: ArrayStore;
product: Product;
value: number[];
target: EventTarget;
visible = false;
constructor(service: Service) {
this.dataSource = new ArrayStore({
data: service.getProducts(),
key: 'Id',
});
this.simpleProducts = service.getSimpleProducts();
this.editableProducts = this.simpleProducts.slice();
this.value = [1, 2];
}
onCustomItemCreating(args: DxTagBoxTypes.CustomItemCreatingEvent) {
const newValue = args.text;
const isItemInDataSource = this.editableProducts.some((item) => item === newValue);
if (!isItemInDataSource) {
this.editableProducts.unshift(newValue);
}
args.customItem = newValue;
}
onMouseEnter({ target }: MouseEvent, product: Product) {
this.target = target;
this.product = product;
this.visible = true;
}
onMouseLeave() {
this.target = null;
this.visible = false;
}
isDisabled(product: Product) {
return product.Name === 'SuperHD Video Player';
}
getAltText(text: String) {
return `${text}. Picture`;
}
}
@NgModule({
imports: [
BrowserModule,
DxTemplateModule,
DxTagBoxModule,
DxPopoverModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
body .custom-item {
padding-left: 7px;
padding-right: 7px;
}
::ng-deep .custom-item > img {
height: 30px;
width: 40px;
float: left;
margin-top: 2px;
}
::ng-deep .custom-item > div.product-name {
margin-left: 40px;
line-height: 34px;
font-size: 14px;
}
body .custom-item input {
background-color: transparent;
}
body .dx-popup-content .custom-item {
padding-top: 7px;
padding-bottom: 8px;
}
::ng-deep .dx-popup-content .custom-item > div {
padding-left: 8px;
text-indent: 0;
text-overflow: ellipsis;
overflow: hidden;
}
::ng-deep .dx-tag-content {
display: flex;
align-items: center;
}
::ng-deep .tag-img {
height: 30px;
margin-right: 5px;
}
::ng-deep .dx-tag-content.disabled-tag {
padding-right: 6px;
opacity: 0.5;
cursor: not-allowed;
}
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 = [
'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 Bluetooth',
'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.png',
}, {
Id: 2,
Name: 'SuperHD Video Player',
Price: 400,
Current_Inventory: 150,
Backorder: 0,
Manufacturing: 25,
Category: 'Video Players',
ImageSrc: '../../../../images/products/2.png',
}, {
Id: 3,
Name: 'SuperPlasma 50',
Price: 2400,
Current_Inventory: 0,
Backorder: 0,
Manufacturing: 0,
Category: 'Televisions',
ImageSrc: '../../../../images/products/3.png',
}, {
Id: 4,
Name: 'SuperLED 50',
Price: 1600,
Current_Inventory: 77,
Backorder: 0,
Manufacturing: 55,
Category: 'Televisions',
ImageSrc: '../../../../images/products/4.png',
}, {
Id: 5,
Name: 'SuperLED 42',
Price: 1450,
Current_Inventory: 445,
Backorder: 0,
Manufacturing: 0,
Category: 'Televisions',
ImageSrc: '../../../../images/products/5.png',
}, {
Id: 6,
Name: 'SuperLCD 55',
Price: 1350,
Current_Inventory: 345,
Backorder: 0,
Manufacturing: 5,
Category: 'Televisions',
ImageSrc: '../../../../images/products/6.png',
}, {
Id: 7,
Name: 'SuperLCD 42',
Price: 1200,
Current_Inventory: 210,
Backorder: 0,
Manufacturing: 20,
Category: 'Televisions',
ImageSrc: '../../../../images/products/7.png',
}, {
Id: 8,
Name: 'SuperPlasma 65',
Price: 3500,
Current_Inventory: 0,
Backorder: 0,
Manufacturing: 0,
Category: 'Televisions',
ImageSrc: '../../../../images/products/8.png',
}, {
Id: 9,
Name: 'SuperLCD 70',
Price: 4000,
Current_Inventory: 95,
Backorder: 0,
Manufacturing: 5,
Category: 'Televisions',
ImageSrc: '../../../../images/products/9.png',
}, {
Id: 10,
Name: 'DesktopLED 21',
Price: 175,
Current_Inventory: null,
Backorder: 425,
Manufacturing: 75,
Category: 'Monitors',
ImageSrc: '../../../../images/products/10.png',
}, {
Id: 12,
Name: 'DesktopLCD 21',
Price: 170,
Current_Inventory: 210,
Backorder: 0,
Manufacturing: 60,
Category: 'Monitors',
ImageSrc: '../../../../images/products/12.png',
}, {
Id: 13,
Name: 'DesktopLCD 19',
Price: 160,
Current_Inventory: 150,
Backorder: 0,
Manufacturing: 210,
Category: 'Monitors',
ImageSrc: '../../../../images/products/13.png',
}, {
Id: 14,
Name: 'Projector Plus',
Price: 550,
Current_Inventory: null,
Backorder: 55,
Manufacturing: 10,
Category: 'Projectors',
ImageSrc: '../../../../images/products/14.png',
}, {
Id: 15,
Name: 'Projector PlusHD',
Price: 750,
Current_Inventory: 110,
Backorder: 0,
Manufacturing: 90,
Category: 'Projectors',
ImageSrc: '../../../../images/products/15.png',
}, {
Id: 16,
Name: 'Projector PlusHT',
Price: 1050,
Current_Inventory: 0,
Backorder: 75,
Manufacturing: 57,
Category: 'Projectors',
ImageSrc: '../../../../images/products/16.png',
}, {
Id: 17,
Name: 'ExcelRemote IR',
Price: 150,
Current_Inventory: 650,
Backorder: 0,
Manufacturing: 190,
Category: 'Automation',
ImageSrc: '../../../../images/products/17.png',
}, {
Id: 18,
Name: 'ExcelRemote Bluetooth',
Price: 180,
Current_Inventory: 310,
Backorder: 0,
Manufacturing: 0,
Category: 'Automation',
ImageSrc: '../../../../images/products/18.png',
}, {
Id: 19,
Name: 'ExcelRemote IP',
Price: 200,
Current_Inventory: 0,
Backorder: 325,
Manufacturing: 225,
Category: 'Automation',
ImageSrc: '../../../../images/products/19.png',
},
];
@Injectable()
export class Service {
getProducts(): Product[] {
return products;
}
getSimpleProducts(): string[] {
return simpleProducts;
}
}
const productNameLabel = { 'aria-label': 'Product' };
// 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/compiler': {
'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@24.1.7/cjs',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13',
'devextreme/bundles/dx.all': 'npm:devextreme@24.1.7/bundles/dx.all.js',
'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.12',
'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',
'devextreme-angular/http': 'bundles:devextreme-angular/devextreme-angular-http.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@2.2.12/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/24.1.7/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@0.13.3/bundles/zone.umd.min.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 TagBox properties:
-
items
An array of items to display in the drop-down list. Do not use the items property and the dataSource property in the same configuration. -
dataSource
Binds the TagBox to a data source, which allows you to perform complex data operations. Do not use the dataSource property and the items property in the same configuration. -
searchEnabled
Enables interactive item search. -
showSelectionControls
Enables item selection controls. -
applyValueMode
Specifies whether TagBox applies the selection instantly or after a confirmation. -
hideSelectedItems
Specifies whether TagBox removes selected items from the drop-down list. -
multiline
Specifies whether TagBox enables horizontal scrolling when the input field cannot fit all selected items. -
acceptCustomValue
Allows users to enter custom values. To enable this capability, implement the onCustomItemCreating handler. -
placeholder
Sets the value of the placeholder string. -
value
Specifies the list of currently selected items. -
disabled
Specifies whether the component responds to user interaction. -
itemTemplate
Allows you to customize the appearance and content of list items. -
tagTemplate Allows you to customize the appearance and content of list item tooltips.
To get started with the DevExtreme TagBox component, refer to the following tutorial for step-by-step instructions: Getting Started with TagBox.