Configuration

An object defining configuration options for the Accordion widget.

See Also

accessKey

Specifies the shortcut key that sets focus on the widget.

Type:

String

Default Value: null

The value of this option will be passed to the accesskey attribute of the HTML element that underlies the widget.

activeStateEnabled

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

Type:

Boolean

Default Value: false

This option is used when the widget is displayed on a platform whose guidelines include the active state change for widgets.

animationDuration

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

Type:

Number

Default Value: 300, 200 (Material)

collapsible

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

Type:

Boolean

Default Value: false

dataSource

Binds the widget to data.

Default Value: null

If you use DevExtreme ASP.NET MVC Controls, refer to the Bind Controls to Data article.

The Accordion works with collections of string values or objects.

Depending on your data source, bind the Accordion to data as follows. If the data source provides objects, also specify the itemTemplate. You can skip this part if the objects contain fields described in the Default Item Template section.

  • Data Array
    Assign the array to the dataSource option.

  • Read-Only Data in JSON Format
    Set the dataSource option to the URL of a JSON file or service that returns JSON data.

  • OData
    Implement an ODataStore.

  • Web API, PHP, MongoDB
    Use one of the following extensions to enable the server to process data according to the protocol DevExtreme widgets use:

    Then, use the createStore method to configure access to the server on the client as shown below. This method is part of DevExtreme.AspNet.Data.

    jQuery
    JavaScript
    $(function() {
        let serviceUrl = "https://url/to/my/service";
        $("#accordionContainer").dxAccordion({
            // ...
            dataSource: DevExpress.data.AspNet.createStore({
                key: "ID",
                loadUrl: serviceUrl + "/GetAction",
                insertUrl: serviceUrl + "/InsertAction",
                updateUrl: serviceUrl + "/UpdateAction",
                deleteUrl: serviceUrl + "/DeleteAction"
            })
        })
    });
    Angular
    app.component.ts
    app.component.html
    app.module.ts
    import { Component } from '@angular/core';
    import CustomStore from 'devextreme/data/custom_store';
    import { createStore } from 'devextreme-aspnet-data-nojquery';
    
    @Component({
        selector: 'app-root',
        templateUrl: './app.component.html',
        styleUrls: ['./app.component.css']
    })
    export class AppComponent {
        store: CustomStore;
        constructor() {
            let serviceUrl = "https://url/to/my/service";
            this.store = createStore({
                key: "ID",
                loadUrl: serviceUrl + "/GetAction",
                insertUrl: serviceUrl + "/InsertAction",
                updateUrl: serviceUrl + "/UpdateAction",
                deleteUrl: serviceUrl + "/DeleteAction"
            })
        }
    }
    <dx-accordion ...
        [dataSource]="store">
    </dx-accordion>
    import { BrowserModule } from '@angular/platform-browser';
    import { NgModule } from '@angular/core';
    import { AppComponent } from './app.component';
    
    import { DxAccordionModule } from 'devextreme-angular';
    
    @NgModule({
        declarations: [
            AppComponent
        ],
        imports: [
            BrowserModule,
            DxAccordionModule
        ],
        providers: [],
        bootstrap: [AppComponent]
    })
    export class AppModule { }
    Vue
    App.vue
    <template> 
        <dx-accordion ...
            :data-source="store" />
    </template>
    
    <script>
    import 'devextreme/dist/css/dx.common.css';
    import 'devextreme/dist/css/dx.light.css';
    
    import CustomStore from 'devextreme/data/custom_store';
    import { createStore } from 'devextreme-aspnet-data-nojquery';
    import { DxAccordion } from 'devextreme-vue/accordion';
    
    export default {
        components: {
            DxAccordion
        },
        data() {
            const serviceUrl = "https://url/to/my/service";
            const store = createStore({
                key: "ID",
                loadUrl: serviceUrl + "/GetAction",
                insertUrl: serviceUrl + "/InsertAction",
                updateUrl: serviceUrl + "/UpdateAction",
                deleteUrl: serviceUrl + "/DeleteAction"
            });
            return {
                store
            }
        }
    }
    </script>
    React
    App.js
    import React from 'react';
    import 'devextreme/dist/css/dx.common.css';
    import 'devextreme/dist/css/dx.light.css';
    
    import CustomStore from 'devextreme/data/custom_store';
    import { createStore } from 'devextreme-aspnet-data-nojquery';
    import Accordion from 'devextreme-react/accordion';
    
    const serviceUrl = "https://url/to/my/service";
    const store = createStore({
        key: "ID",
        loadUrl: serviceUrl + "/GetAction",
        insertUrl: serviceUrl + "/InsertAction",
        updateUrl: serviceUrl + "/UpdateAction",
        deleteUrl: serviceUrl + "/DeleteAction"
    });
    
    class App extends React.Component {
        render() {
            return (
                <Accordion ...
                    dataSource={store} />
            );
        }
    }
    export default App;
  • Any other data source
    Implement a CustomStore.

Regardless of the data source on the input, the Accordion always wraps it in the DataSource object. This object allows you to sort, filter, group, and otherwise shape data. To get its instance, call the getDataSource() method.

NOTE

Please review the following notes about data binding:

  • Do not specify the items option if you specified the dataSource, and vice versa.

  • Data field names should not contain the following characters: ., ,, :, [, and ].

  • DataSource and stores provide methods to process and update data. However, the methods do not allow you to perform particular tasks (for example, replace the entire dataset, reconfigure data access at runtime). For such tasks, create a new array, store, or DataSource and assign it to the dataSource option as shown in the articles about changing options in jQuery, Angular, React, and Vue.

deferRendering

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

Type:

Boolean

Default Value: true

disabled

Specifies whether the widget responds to user interaction.

Type:

Boolean

Default Value: false

elementAttr

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

Type:

Object

Default Value: {}
jQuery
$(function(){
    $("#accordionContainer").dxAccordion({
        // ...
        elementAttr: {
            id: "elementId",
            class: "class-name"
        }
    });
});
Angular
HTML
TypeScript
<dx-accordion ...
    [elementAttr]="{ id: 'elementId', class: 'class-name' }">
</dx-accordion>
import { DxAccordionModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxAccordionModule
    ],
    // ...
})
ASP.NET MVC Controls
Razor C#
Razor VB
@(Html.DevExtreme().Accordion()
    .ElementAttr("class", "class-name")
    // ===== or =====
    .ElementAttr(new {
        @id = "elementId",
        @class = "class-name"
    })
    // ===== or =====
    .ElementAttr(new Dictionary<string, object>() {
        { "id", "elementId" },
        { "class", "class-name" }
    })

)
@(Html.DevExtreme().Accordion() _
    .ElementAttr("class", "class-name")
    ' ===== or =====
    .ElementAttr(New With {
        .id = "elementId",
        .class = "class-name"
    })
    ' ===== or =====
    .ElementAttr(New Dictionary(Of String, Object) From {
        { "id", "elementId" },
        { "class", "class-name" }
    })
)

focusStateEnabled

Specifies whether the widget can be focused using keyboard navigation.

Type:

Boolean

Default Value: false, true (desktop)

height

Specifies the widget's height.

Type:

Number

|

String

|

Function

Return Value:

Number

|

String

The widget's height.

Default Value: undefined

This option accepts a value of one of the following types:

  • Number
    The height in pixels.

  • String
    A CSS-accepted measurement of height. For example, "55px", "80%", "inherit".

  • Function
    A function returning either of the above. For example:

    JavaScript
    height: function() {
        return window.innerHeight / 1.5;
    }

hint

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

Type:

String

Default Value: undefined

hoverStateEnabled

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

Type:

Boolean

Default Value: true

itemHoldTimeout

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

Type:

Number

Default Value: 750

items

An array of items displayed by the widget.

Raised Events: optionChanged

If you need to update the widget items, reassign the entire items[] array as shown in the following example:

JavaScript
accordionInstance.option('items', newItems);

As an alternative to items, you can use the dataSource option. It accepts the DataSource object, whose underlying stores provide an API that allows you to update individual items without reassigning the entire item collection.

NOTE
Do not use the items option if you use dataSource, and vice versa.

Particular fields in objects can control the widget's appearance. See Default Templates for more information.

itemTemplate

Specifies a custom template for items.

Type:

template

Function parameters:
itemData:

Object

The current item's data.

itemIndex:

Number

The current item's index.

itemElement:

Element (jQuery or HTML)

The item's container. It is an HTML Element or a jQuery Element when you use jQuery.

Return Value:

String

|

DOM Node

|

jQuery

A template name or container.

Default Value: 'item'

itemTitleTemplate

Specifies a custom template for item titles.

Type:

template

Function parameters:
itemData:

Object

The current item's data.

itemIndex:

Number

The current item's index.

itemElement:

Element (jQuery or HTML)

The item's container. It is an HTML Element or a jQuery Element when you use jQuery.

Return Value:

String

|

DOM Node

|

jQuery

A template name or container.

Default Value: 'title'

keyExpr

Specifies which data field provides keys for widget items.

Type:

String

|

Function

Default Value: null
NOTE
The key value should be unique within the data array.
See Also

multiple

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

Type:

Boolean

Default Value: false

noDataText

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

Type:

String

Default Value: 'No data to display'

onContentReady

A function that is executed when the widget's content is ready and each time the content is changed.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

Accordion

The widget's instance.

element

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model

Object

Model data. Available only when using Knockout.

Default Value: null

onDisposing

A function that is executed before the widget is disposed of.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

Accordion

The widget's instance.

element

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onInitialized

A function used in JavaScript frameworks to save the widget instance.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

Accordion

The widget's instance.

element

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

Default Value: null
See Also

onItemClick

A function that is executed when a collection item is clicked or tapped.

Type:

Function

|

String

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

Accordion

The widget's instance.

element

Element (jQuery or HTML)

The widget's container.

event

Event (jQuery or dxEvent)

The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery.

itemData

Object

The clicked item's data.

itemElement

Element (jQuery or HTML)

The item's container. It is an HTML Element or a jQuery Element when you use jQuery.

itemIndex

Number

The clicked item's index.

jQueryEvent

jQuery.Event

Use 'event' instead.

The jQuery event that caused the handler execution. Deprecated in favor of the event field.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onItemContextMenu

A function that is executed when a collection item is right-clicked or pressed.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

Accordion

The widget's instance.

element

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

event

Event (jQuery or dxEvent)

The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery.

itemData

Object

The item's data.

itemElement

Element (jQuery or HTML)

The item's container. It is an HTML Element or a jQuery Element when you use jQuery.

itemIndex

Number

The item's index.

jQueryEvent

jQuery.Event

Use 'event' instead.

The jQuery event that caused the handler execution. Deprecated in favor of the event field.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onItemHold

A function that is executed when a collection item has been held for a specified period.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

Accordion

The widget's instance.

element

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

event

Event (jQuery or dxEvent)

The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery.

itemData

Object

The data of the item being held.

itemElement

Element (jQuery or HTML)

The item's container. It is an HTML Element or a jQuery Element when you use jQuery.

itemIndex

Number

The item's index.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onItemRendered

A function that is executed after a collection item is rendered.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

Accordion

The widget's instance.

element

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

itemData

Object

The current item's data.

itemElement

Element (jQuery or HTML)

The item's container. It is an HTML Element or a jQuery Element when you use jQuery.

itemIndex

Number

The current item's index.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onItemTitleClick

A function that is executed when an accordion item's title is clicked or tapped.

Type:

Function

|

String

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

Accordion

The widget's instance.

element

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

event

Event (jQuery or dxEvent)

The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery.

itemData

Object

The clicked item's data.

itemElement

Element (jQuery or HTML)

The item's container. It is an HTML Element or a jQuery Element when you use jQuery.

itemIndex

Number

The clicked item's index.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onOptionChanged

A function that is executed after a widget option is changed.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

Accordion

The widget's instance.

fullName

String

The path to the modified option that includes all parent options.

name

String

The modified option if it belongs to the first level. Otherwise, the first-level option it is nested into.

value any

The modified option's new value.

element

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model

Object

Model data. Available only if you use Knockout.

Default Value: null

onSelectionChanged

A function that is executed when a collection item is selected or selection is canceled.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
addedItems

Array<any>

The data of the items that have been selected.

component

Accordion

The widget's instance.

element

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model

Object

Model data. Available only if you use Knockout.

removedItems

Array<any>

The data of the items whose selection has been canceled.

Default Value: null

repaintChangesOnly

Specifies whether to repaint only those elements whose data changed.

Type:

Boolean

Default Value: false
See Also

rtlEnabled

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

Type:

Boolean

Default Value: false

When this option is set to true, the widget text flows from right to left, and the layout of elements is reversed. To switch the entire application/site to the right-to-left representation, assign true to the rtlEnabled field of the object passed to the DevExpress.config(config) method.

JavaScript
DevExpress.config({
    rtlEnabled: true
});
See Also

selectedIndex

The index number of the currently selected item.

Type:

Number

Default Value: 0

selectedItem

The selected item object.

Type:

Object

Default Value: null
Raised Events: selectionChanged

selectedItemKeys

Specifies an array of currently selected item keys.

Type:

Array<any>

Raised Events: selectionChanged

The item keys can be specified using the keyExpr option or the key option within the underlying Store.

See Also

selectedItems

An array of currently selected item objects.

Type:

Array<any>

Raised Events: selectionChanged

tabIndex

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

Type:

Number

Default Value: 0

The value of this option will be passed to the tabindex attribute of the HTML element that underlies the widget.

visible

Specifies whether the widget is visible.

Type:

Boolean

Default Value: true

width

Specifies the widget's width.

Type:

Number

|

String

|

Function

Return Value:

Number

|

String

The widget's width.

Default Value: undefined

This option accepts a value of one of the following types:

  • Number
    The width in pixels.

  • String
    A CSS-accepted measurement of width. For example, "55px", "80%", "auto", "inherit".

  • Function
    A function returning either of the above. For example:

    JavaScript
    width: function() {
        return window.innerWidth / 1.5;
    }