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.
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($event)"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">With custom placeholder</div>
<div class="dx-field-value">
<dx-tag-box
[items]="simpleProducts"
placeholder="Choose Product..."
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Disabled</div>
<div class="dx-field-value">
<dx-tag-box
[items]="simpleProducts"
[value]="[simpleProducts[0]]"
[disabled]="true"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Data source</div>
<div class="dx-field-value">
<dx-tag-box
[dataSource]="dataSource"
displayExpr="Name"
valueExpr="Id"
[inputAttr]="{ 'aria-label': 'Product' }"
>
</dx-tag-box>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Custom template</div>
<div class="dx-field-value">
<dx-tag-box
[dataSource]="dataSource"
[value]="value"
displayExpr="Name"
valueExpr="Id"
itemTemplate="customItem"
tagTemplate="customTag"
[inputAttr]="{ 'aria-label': 'Product' }"
>
<div *dxTemplate="let product of 'customItem'">
<div class="custom-item">
<img [src]="product.ImageSrc" [alt]="getAltText(product.Name)" />
<div class="product-name">
{{ product.Name }}
</div>
</div>
</div>
<div *dxTemplate="let product of 'customTag'">
<div
class="dx-tag-content"
[class.disabled-tag]="isDisabled(product)"
[attr.aria-disabled]="isDisabled(product)"
(mouseenter)="onMouseEnter($event, product)"
(mouseleave)="onMouseLeave()"
>
<img
[src]="product.ImageSrc"
[alt]="getAltText(product.Name)"
class="tag-img"
/>
<span>{{ product.Name }}</span>
@if (!isDisabled(product)) {
<div 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 { bootstrapApplication } from '@angular/platform-browser';
import { Component, enableProdMode, provideZoneChangeDetection } from '@angular/core';
import { DxTagBoxModule, DxPopoverModule } from 'devextreme-angular';
import { ArrayStore } from 'devextreme-angular/common/data';
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.component.html',
styleUrls: ['./app.component.css'],
imports: [
DxTagBoxModule,
DxPopoverModule,
],
})
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`;
}
}
bootstrapApplication(AppComponent, {
providers: [
provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }),
],
});
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' };
<!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 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.