Angular Accordion Properties
See Also
- Configure a Widget: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
accessKey
The value of this property will be passed to the accesskey
attribute of the HTML element that underlies the UI component.
animationDuration
A number specifying the time in milliseconds spent on the animation of the expanding or collapsing of a panel.
dataSource
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 items section.
Data Array
Assign the array to the dataSource property.Read-Only Data in JSON Format
Set the dataSource property 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 UI components 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.tsapp.component.htmlapp.module.tsimport { 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> <DxAccordion ... :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.jsimport 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 perform other data shaping operations. To get its instance, call the getDataSource() method.
Review the following notes about data binding:
Do not specify the items property if you specified the dataSource, and vice versa.
Data field names cannot be equal to
this
and should not contain the following characters:.
,:
,[
, and]
.The stores and DataSource have 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 property as shown in the articles about changing properties 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.
elementAttr
Specifies the global attributes to be attached to the UI component's container element.
jQuery
$(function(){ $("#accordionContainer").dxAccordion({ // ... elementAttr: { id: "elementId", class: "class-name" } }); });
Angular
<dx-accordion ... [elementAttr]="{ id: 'elementId', class: 'class-name' }"> </dx-accordion>
import { DxAccordionModule } from "devextreme-angular"; // ... export class AppComponent { // ... } @NgModule({ imports: [ // ... DxAccordionModule ], // ... })
Vue
<template> <DxAccordion ... :element-attr="accordionAttributes"> </DxAccordion> </template> <script> import DxAccordion from 'devextreme-vue/accordion'; export default { components: { DxAccordion }, data() { return { accordionAttributes: { id: 'elementId', class: 'class-name' } } } } </script>
React
import React from 'react'; import Accordion from 'devextreme-react/accordion'; class App extends React.Component { accordionAttributes = { id: 'elementId', class: 'class-name' } render() { return ( <Accordion ... elementAttr={this.accordionAttributes}> </Accordion> ); } } export default App;
height
This property 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:JavaScriptheight: function() { return window.innerHeight / 1.5; }
itemComponent
An alias for the itemTemplate property specified in React. Accepts a custom component. Refer to Using a Custom Component for more information.
itemRender
An alias for the itemTemplate property specified in React. Accepts a rendering function. Refer to Using a Rendering Function for more information.
items[]
Array<String | dxAccordionItem | Object>
The items array can contain:
- Strings
- Objects with fields described in this section
- Objects with any other fields. In this case, specify the itemTemplate.
If you need to update the UI component items, reassign the entire items array as shown in the following example:
accordionInstance.option('items', newItems);
As an alternative to items, you can use the dataSource property. It accepts the DataSource object, whose underlying stores provide an API that allows you to update individual items without reassigning the entire item collection.
itemTitleComponent
An alias for the itemTitleTemplate property specified in React. Accepts a custom component. Refer to Using a Custom Component for more information.
itemTitleRender
An alias for the itemTitleTemplate property specified in React. Accepts a rendering function. Refer to Using a Rendering Function for more information.
keyExpr
Specifies the key property that provides key values to access data items. Each key value must be unique.
onContentReady
A function that is executed when the UI component's content is ready and each time the content is changed.
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
model |
Model data. Available only when using Knockout. |
onDisposing
A function that is executed before the UI component is disposed of.
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
model |
Model data. Available only if you use Knockout. |
onInitialized
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
onItemClick
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery. |
itemData |
The clicked item's data. |
|
itemElement |
The item's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
itemIndex |
The clicked item's index. |
|
jQueryEvent |
Use 'event' instead. The jQuery event that caused the handler execution. Deprecated in favor of the event field. |
|
model |
Model data. Available only if you use Knockout. |
onItemContextMenu
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery. |
itemData |
The item's data. |
|
itemElement |
The item's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
itemIndex |
The item's index. |
|
jQueryEvent |
Use 'event' instead. The jQuery event that caused the handler execution. Deprecated in favor of the event field. |
|
model |
Model data. Available only if you use Knockout. |
onItemHold
A function that is executed when a collection item has been held for a specified period.
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery. |
itemData |
The data of the item being held. |
|
itemElement |
The item's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
itemIndex |
The item's index. |
|
model |
Model data. Available only if you use Knockout. |
onItemRendered
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
itemData |
The current item's data. |
|
itemElement |
The item's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
itemIndex |
The current item's index. |
|
model |
Model data. Available only if you use Knockout. |
onItemTitleClick
Name | Type | Description |
---|---|---|
component |
The UI component's instance. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
event | Event (jQuery or EventObject) |
The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery. |
itemData |
The clicked item's data. |
|
itemElement |
The item's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
itemIndex |
The clicked item's index. |
|
model |
Model data. Available only if you use Knockout. |
onOptionChanged
Name | Type | Description |
---|---|---|
model |
Model data. Available only if you use Knockout. |
|
fullName |
The path to the modified property that includes all parent properties. |
|
element |
The UI component's container. It is an HTML Element or a jQuery Element when you use jQuery. |
|
component |
The UI component's instance. |
|
name |
The modified property if it belongs to the first level. Otherwise, the first-level property it is nested into. |
|
value | any |
The modified property's new value. |
The following example shows how to subscribe to component property changes:
jQuery
$(function() { $("#accordionContainer").dxAccordion({ // ... onOptionChanged: function(e) { if(e.name === "changedProperty") { // handle the property change here } } }); });
Angular
<dx-accordion ... (onOptionChanged)="handlePropertyChange($event)"> </dx-accordion>
import { Component } from '@angular/core'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.css'] }) export class AppComponent { // ... handlePropertyChange(e) { if(e.name === "changedProperty") { // handle the property change here } } }
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
<template> <DxAccordion ... @option-changed="handlePropertyChange" /> </template> <script> import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import DxAccordion from 'devextreme-vue/accordion'; export default { components: { DxAccordion }, // ... methods: { handlePropertyChange: function(e) { if(e.name === "changedProperty") { // handle the property change here } } } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.common.css'; import 'devextreme/dist/css/dx.light.css'; import Accordion from 'devextreme-react/accordion'; const handlePropertyChange = (e) => { if(e.name === "changedProperty") { // handle the property change here } } export default function App() { return ( <Accordion ... onOptionChanged={handlePropertyChange} /> ); }
repaintChangesOnly
See Also
- push(changes) in: ArrayStore | CustomStore | LocalStore | ODataStore
- DataSource.reshapeOnPush
rtlEnabled
When this property is set to true, the UI component 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.
DevExpress.config({ rtlEnabled: true });
See Also
- Right-to-Left Support Demo: DataGrid | Navigation Widgets | Editors
selectedItemKeys
Array<any>
The item keys can be specified using the keyExpr property or the key property within the underlying Store.
See Also
- key in ArrayStore | CustomStore | LocalStore | ODataStore
tabIndex
The value of this property will be passed to the tabindex
attribute of the HTML element that underlies the UI component.
width
This property 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:JavaScriptwidth: function() { return window.innerWidth / 1.5; }
If you have technical questions, please create a support ticket in the DevExpress Support Center.