Angular Accordion API

The Accordion widget contains several panels displayed one under another. These panels can be collapsed or expanded by an end user, which makes this widget very useful for presenting information in a limited amount of space.

import { DxAccordionModule } from "devextreme-angular"

DevExtreme widgets are integrated with many popular libraries and frameworks. See the Installation section (for JavaScript libraries) or the Prerequisites and Installation section (for ASP.NET MVC framework) to find details on setting up DevExtreme with a particular library or framework.

The following code shows how to create the Accordion widget using every supported library and framework. For more details on working with widgets in these libraries and frameworks, see the Widget Basics topic for jQuery, Angular, AngularJS, Knockout or ASP.NET MVC.

jQuery
JavaScript
HTML
$(function () {
    $("#accordion").dxAccordion({
        dataSource: [
            { title: "Panel 1 Title", text: "Panel 1 Text Content" },
            { title: "Panel 2 Title", text: "Panel 2 Text Content" }
        ],
        collapsible: true,
        multiple: true
    });
});
<div id="accordion"></div>
Angular
HTML
TypeScript
<dx-accordion
    [dataSource]="accordionData"
    [collapsible]="true"
    [multiple]="true">
</dx-accordion>
import { DxAccordionModule } from 'devextreme-angular';
// ...
export class AppComponent {
    accordionData = [
        { title: "Panel 1 Title", text: "Panel 1 Text Content" },
        { title: "Panel 2 Title", text: "Panel 2 Text Content" }
    ];
}
@NgModule({
    imports: [
        // ...
        DxAccordionModule
    ],
    // ...
})
AngularJS
HTML
JavaScript
<div ng-controller="DemoController">
    <div dx-accordion="{
        dataSource: accordionData,
        collapsible: true,
        multiple: true
    }"></div>
</div>
angular.module('DemoApp', ['dx'])
    .controller('DemoController', function DemoController($scope) {
        $scope.accordionData = [
            { title: "Panel 1 Title", text: "Panel 1 Text Content" },
            { title: "Panel 2 Title", text: "Panel 2 Text Content" }
        ];
    });
Knockout
HTML
JavaScript
<div data-bind="dxAccordion: {
    dataSource: accordionData,
    collapsible: true,
    multiple: true
}"></div>
var viewModel = {
    accordionData: [
        { title: "Panel 1 Title", text: "Panel 1 Text Content" },
        { title: "Panel 2 Title", text: "Panel 2 Text Content" }
    ]
};
ko.applyBindings(viewModel);
ASP.NET MVC Controls
Razor C#
Razor VB
@(Html.DevExtreme().Accordion()
    .ID("accordion")
    .DataSource(new[] {
        new { title = "Panel 1 Title", text = "Panel 1 Text Content" },
        new { title = "Panel 2 Title", text = "Panel 2 Text Content" }
    })
    .Collapsible(true)
    .Multiple(true)
)
@(Html.DevExtreme().Accordion() _
    .ID("accordion") _
    .DataSource({
        New With { .title = "Panel 1 Title", .text = "Panel 1 Text Content" },
        New With { .title = "Panel 2 Title", .text = "Panel 2 Text Content" }
    }) _
    .Collapsible(True) _
    .Multiple(True)
)

View Demo Watch Video

See Also

Properties

An object defining configuration options for the Accordion widget.

Name Description
accessKey

Specifies the shortcut key that sets focus on the widget.
activeStateEnabled

Specifies whether or not the widget changes its state when interacting with a user.
animationDuration

A number specifying the time in milliseconds spent on the animation of the expanding or collapsing of a panel.
collapsible

Specifies whether all items can be collapsed or whether at least one item must always be expanded.
dataSource

A data source used to fetch data to be displayed by the widget.
deferRendering

Specifies whether to render the panel's content when it is displayed. If false, the content is rendered immediately.
disabled

Specifies whether the widget responds to user interaction.
elementAttr

Specifies the attributes to be attached to the widget's root element.
focusStateEnabled

Specifies whether the widget can be focused using keyboard navigation.
height

Specifies the widget's height.
hint

Specifies text for a hint that appears when a user pauses on the widget.
hoverStateEnabled

Specifies whether the widget changes its state when a user pauses on it.
itemHoldTimeout

The time period in milliseconds before the onItemHold event is raised.
items

An array of items displayed by the widget.
itemTemplate

Specifies a custom template for items.
itemTitleTemplate

Specifies a custom template for item titles.
keyExpr

Specifies which data field provides keys for widget items.
multiple

Specifies whether the widget can expand several items or only a single item at once.
noDataText

The text or HTML markup displayed by the widget if the item collection is empty.
onContentReady

A handler for the contentReady event. Executed when the widget's content is ready. This handler may be executed multiple times during the widget's lifetime depending on the number of times its content changes.
onDisposing

A handler for the disposing event. Executed when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
onInitialized

A handler for the initialized event. Executed only once, after the widget is initialized.
onItemClick

A handler for the itemClick event.
onItemContextMenu

A handler for the itemContextMenu event.
onItemHold

A handler for the itemHold event.
onItemRendered

A handler for the itemRendered event.
onItemTitleClick

A handler for the itemTitleClick event.
onOptionChanged

A handler for the optionChanged event. Executed after an option of the widget is changed.
onSelectionChanged

A handler for the selectionChanged event. Raised after an item is selected or unselected.
rtlEnabled

Switches the widget to a right-to-left representation.
selectedIndex

The index number of the currently selected item.
selectedItem

The selected item object.
selectedItemKeys

Specifies an array of currently selected item keys.
selectedItems

An array of currently selected item objects.
tabIndex

Specifies the number of the element when the Tab key is used for navigating.
visible

Specifies whether the widget is visible.
width

Specifies the widget's width.

Methods

This section describes members used to manipulate the Accordion widget.

Name Description
beginUpdate()

Prevents the widget from refreshing until the endUpdate() method is called.
collapseItem(index)

Collapses an item with a specific index.
defaultOptions(rule)

Specifies the device-dependent default configuration options for this component.
dispose()

Disposes of all the resources allocated to the Accordion instance.
element()

Gets the root widget element.
endUpdate()

Refreshes the widget after a call of the beginUpdate() method.
expandItem(index)

Expands an item with a specific index.
focus()

Sets focus on the widget.
getDataSource()

Gets the DataSource instance.
getInstance(element)

Gets the instance of a widget found using its DOM node.
instance()

Gets the widget's instance. Use it to access other methods of the widget.
off(eventName)

Detaches all event handlers from a single event.
off(eventName, eventHandler)

Detaches a particular event handler from a single event.
on(eventName, eventHandler)

Subscribes to an event.
on(events)

Subscribes to events.
option()

Gets all widget options.
option(optionName)

Gets the value of a single option.
option(optionName, optionValue)

Updates the value of a single option.
option(options)

Updates the values of several options.
registerKeyHandler(key, handler)

Registers a handler to be executed when a user presses a specific key.
repaint()

Repaints the widget. Call it if you made modifications that changed the widget's state to invalid.
updateDimensions()

Updates the dimensions of the widget contents.

Events

This section describes events fired by this widget.

Name Description
contentReady

Raised when the widget's content is ready.
disposing

Raised when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
initialized

Raised only once, after the widget is initialized.
itemClick

Fires when a widget item is clicked.
itemContextMenu

Fires when the right mouse button is clicked when the pointer is over a widget item, or when the "sustained" (also known as a long press) touch action is performed.
itemHold

Fires when the widget's collection item is being held for the time period specified by the itemHoldTimeout option.
itemRendered

Fires after a collection item is rendered.
itemTitleClick

Fires when a widget item title is clicked.
optionChanged

Raised after a widget option is changed.
selectionChanged

Fires after a collection item is selected or unselected.

See Also

Default Item Template

This section lists the data source fields that are used in a default template for Accordion items.

Type:

Object

By default, a predefined item template is applied to display the items of this widget. This template is based on certain fields of the data source provided for this widget. Below is a list of these fields. If the default item template is not appropriate for your task, implement a custom item template based on these or other fields of your data source.

See Also