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 DropDownButton features used.
Backend API
<div class="dx-fieldset">
<div class="dx-fieldset-header">Standalone button</div>
<div class="dx-field">
<div class="dx-field-label">Text and icon</div>
<div class="dx-field-value">
<dx-drop-down-button
text="Download Trial"
[dropDownOptions]="{ width: 230 }"
icon="save"
[items]="downloads"
(onItemClick)="onItemClick($event)"
></dx-drop-down-button>
</div>
</div>
<div class="dx-field">
<div class="dx-field-label">Custom template and actions</div>
<div class="dx-field-value">
<dx-drop-down-button
id="custom-template"
[splitButton]="true"
[useSelectMode]="false"
[items]="profileSettings"
displayExpr="name"
keyExpr="id"
(onButtonClick)="onButtonClick($event)"
(onItemClick)="onItemClick($event)"
template="template"
>
<div *dxTemplate="let data of 'template'">
<div class="button-img-container">
<div class="button-img-indicator"></div>
<img
class="button-img"
src="../../../../images/employees/51.png"
alt="employee"
/>
</div>
<div class="text-container">
<div class="button-title">Olivia Peyton</div>
<div class="button-row">IT Manager</div>
</div>
</div>
</dx-drop-down-button>
</div>
</div>
</div>
<div class="dx-fieldset">
<div class="dx-fieldset-header">Embedded in a Toolbar</div>
<div class="dx-field">
<dx-toolbar>
<dxi-toolbar-item
location="before"
widget="dxDropDownButton"
[options]="{
items: alignments,
displayExpr: 'name',
keyExpr: 'value',
selectedItemKey: 'justify',
width: 125,
stylingMode: 'text',
useSelectMode: true,
onSelectionChanged: onAlignmentChanged
}"
>
</dxi-toolbar-item>
<dxi-toolbar-item
location="before"
widget="dxDropDownButton"
[options]="{
onInitialized: onColorPickerInit,
items: colors,
icon: 'square',
stylingMode: 'text',
dropDownOptions: { width: 'auto' },
dropDownContentTemplate: 'colorpicker'
}"
>
</dxi-toolbar-item>
<dxi-toolbar-item
location="before"
widget="dxDropDownButton"
[options]="{
stylingMode: 'text',
displayExpr: 'name',
keyExpr: 'value',
useSelectMode: true,
items: fontSizes,
selectedItemKey: 14,
onSelectionChanged: onFontSizeChanged,
itemTemplate: 'fontItem'
}"
>
</dxi-toolbar-item>
<dxi-toolbar-item
location="before"
widget="dxDropDownButton"
[options]="{
stylingMode: 'text',
icon: 'indent',
displayExpr: 'name',
keyExpr: 'value',
useSelectMode: true,
items: lineHeights,
selectedItemKey: 1.35,
onSelectionChanged: onLineHeightChanged
}"
>
</dxi-toolbar-item>
<div
*dxTemplate="let data of 'fontItem'"
[style.fontSize]="data.value + 'px'"
>
{{ data.name }}
</div>
<div *dxTemplate="let data of 'colorpicker'">
<div class="custom-color-picker">
@for (iconColor of colors; track iconColor) {
<i
class="color dx-icon dx-icon-square"
[style.color]="iconColor"
(click)="onColorClick(iconColor)"
></i>
}
</div>
</div>
</dx-toolbar>
</div>
<div class="dx-field">
<p
id="text"
[style.fontSize]="fontSize + 'px'"
[style.lineHeight]="lineHeight"
[style.color]="color"
[style.textAlign]="alignment"
>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod
tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id
est laborum.</p
>
</div>
</div>
import { bootstrapApplication } from '@angular/platform-browser';
import {
enableProdMode, ChangeDetectorRef, Component, provideZoneChangeDetection,
} from '@angular/core';
import notify from 'devextreme/ui/notify';
import { DxToolbarModule } from 'devextreme-angular';
import { DxDropDownButtonModule, DxDropDownButtonComponent, DxDropDownButtonTypes } from 'devextreme-angular/ui/drop-down-button';
import { ItemObject, Service } from './app.service';
if (!document.location.host.includes('localhost')) {
enableProdMode();
}
type Color = string;
@Component({
selector: 'demo-app',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css'],
providers: [Service],
imports: [
DxDropDownButtonModule,
DxToolbarModule,
],
})
export class AppComponent {
dropDownButton: DxDropDownButtonComponent['instance'];
colors: Color[];
downloads: string[];
profileSettings: ItemObject[];
fontSizes: ItemObject[];
lineHeights: ItemObject[];
alignments: ItemObject[];
fontSize = 14;
color: string = null;
lineHeight = 1.35;
alignment = 'left';
constructor(service: Service, private changeDetectorRef: ChangeDetectorRef) {
this.colors = service.getColors();
this.fontSizes = service.getFontSizes();
this.downloads = service.getDownloads();
this.profileSettings = service.getProfileSettings();
this.alignments = service.getAlignments();
this.lineHeights = service.getLineHeights();
}
onAlignmentChanged = (e: DxDropDownButtonTypes.SelectionChangedEvent): void => {
this.alignment = e.item.value;
this.changeDetectorRef.detectChanges();
};
onFontSizeChanged = (e: DxDropDownButtonTypes.SelectionChangedEvent): void => {
this.fontSize = e.item.value;
this.changeDetectorRef.detectChanges();
};
onLineHeightChanged = (e: DxDropDownButtonTypes.SelectionChangedEvent): void => {
this.lineHeight = e.item.value;
this.changeDetectorRef.detectChanges();
};
onButtonClick(e: DxDropDownButtonTypes.ButtonClickEvent): void {
notify(`Go to ${e.element.querySelector('.button-title').textContent}'s profile`, 'success', 600);
}
onItemClick(e: DxDropDownButtonTypes.ItemClickEvent): void {
notify(e.itemData.name || e.itemData, 'success', 600);
}
onColorPickerInit = (e: DxDropDownButtonTypes.InitializedEvent): void => {
this.dropDownButton = e.component;
};
onColorClick(color: Color): void {
const iconElement = this.dropDownButton.element().getElementsByClassName('dx-icon-square')[0] as HTMLElement;
iconElement.style.color = color;
this.color = color;
this.dropDownButton.close();
}
}
bootstrapApplication(AppComponent, {
providers: [
provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }),
],
});
::ng-deep .demo-container .dx-fieldset:first-child {
width: 500px;
}
.custom-color-picker {
width: 82px;
padding: 5px;
}
.color {
cursor: pointer;
font-size: 18px;
}
.text-container {
padding-inline: 12px 4px;
display: flex;
align-items: flex-start;
flex-direction: column;
}
.button-img-container {
position: relative;
height: 32px;
}
.button-img {
width: 32px;
height: 32px;
position: relative;
border-width: 1px;
border-style: solid;
border-color: var(--dx-color-border);
border-radius: 50%;
}
.button-img-indicator {
position: absolute;
background-color: var(--dx-color-danger);
top: -1px;
inset-inline-end: -1px;
width: 10px;
height: 10px;
border-radius: 50%;
border-width: 2px;
border-style: solid;
border-color: var(--dx-color-main-bg);
z-index: 1;
}
.button-title {
line-height: 20px;
}
.button-row {
font-size: 12px;
line-height: 14px;
color: var(--dx-color-icon);
}
::ng-deep #custom-template .dx-button {
height: 46px;
}
::ng-deep #custom-template .dx-button.dx-dropdownbutton-action .dx-button-content {
padding-inline: 12px;
}
import { Injectable } from '@angular/core';
import { DxDropDownButtonTypes } from 'devextreme-angular/ui/drop-down-button';
export type ItemObject = DxDropDownButtonTypes.Item & { value: number | string; name: string };
const colors = [null, '#980000', '#ff0000', '#ff9900', '#ffff00', '#00ff00', '#00ffff', '#4a86e8', '#0000ff', '#9900ff', '#ff00ff', '#ff3466'];
const profileSettings: ItemObject[] = [
{ value: 1, name: 'Profile', icon: 'user' },
{
value: 4, name: 'Messages', icon: 'email', badge: '5',
},
{ value: 2, name: 'Friends', icon: 'group' },
{ value: 3, name: 'Exit', icon: 'runner' },
];
const downloads = ['Download Trial For Visual Studio', 'Download Trial For All Platforms', 'Package Managers'];
const alignments: ItemObject[] = [
{ value: 'left', name: 'Left', icon: 'alignleft' },
{ value: 'right', name: 'Right', icon: 'alignright' },
{ value: 'center', name: 'Center', icon: 'aligncenter' },
{ value: 'justify', name: 'Justify', icon: 'alignjustify' },
];
const fontSizes: ItemObject[] = [
{ value: 10, name: '10px' },
{ value: 12, name: '12px' },
{ value: 14, name: '14px' },
{ value: 16, name: '16px' },
{ value: 18, name: '18px' },
];
const lineHeights: ItemObject[] = [
{ value: 1, name: '1' },
{ value: 1.35, name: '1.35' },
{ value: 1.5, name: '1.5' },
{ value: 2, name: '2' },
];
@Injectable()
export class Service {
getColors(): string[] {
return colors;
}
getDownloads(): string[] {
return downloads;
}
getAlignments(): ItemObject[] {
return alignments;
}
getProfileSettings(): ItemObject[] {
return profileSettings;
}
getFontSizes(): ItemObject[] {
return fontSizes;
}
getLineHeights(): ItemObject[] {
return lineHeights;
}
}
<!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>
Menu items can be specified in the items or dataSource properties. Use dataSource if data is remote or should be processed.
DropDownButton stores the most recent selected menu item if you set the useSelectMode property to true. In this case, the button uses the selected item's text and icon.
To customize DropDownButton, specify the the following options:
-
itemTemplate
Customizes menu items. -
template
Customizes a base button. -
dropDownContentTemplate
Replaces the drop-down menu with custom content.
To track and handle events, use the onButtonClick, onItemClick, and onSelectionChanged event handlers.