Expand mode in Angular Accordion component
22 Sep 20259 minutes to read
The Accordion supports the two listed types of expandmode while expanding or collapsing the item.
- Single
- Multiple
Single
The Single expand mode allows only one Accordion item to be expanded at a time. When a new item is expanded, the previously expanded item collapses, and the new item enters the expanded state.
You can set an item to be expanded on initial rendering by enabling the expanded property on an Accordion item.
This sample demonstrates the Accordion in Single mode, where only one item is expanded at a time.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccordionModule } from '@syncfusion/ej2-angular-navigations'
import { Component, ViewChild } from '@angular/core';
@Component({
imports: [
AccordionModule
],
standalone: true,
selector: 'app-container',
template: `
<ejs-accordion expandMode='Single'>
<e-accordionitems>
<e-accordionitem expanded='true'>
<ng-template #header>
<div>ASP.NET</div>
</ng-template>
<ng-template #content>
<div>Microsoft ASP.NET is a set of technologies in the Microsoft .NET Framework for building Web applications and XML Web
services. ASP.NET pages execute on the server and generate markup such as HTML, WML, or XML that is sent to a desktop
or mobile browser. ASP.NET pages use a compiled,event-driven programming model that improves performance and enables
the separation of application logic and user interface.</div>
</ng-template>
</e-accordionitem>
<e-accordionitem>
<ng-template #header>
<div>ASP.NET MVC</div>
</ng-template>
<ng-template #content>
<div>The Model-View-Controller (MVC) architectural pattern separates an application into three main components: the model,
the view, and the controller. The ASP.NET MVC framework provides an alternative to the ASP.NET Web Forms pattern for
creating Web applications. The ASP.NET MVC framework is a lightweight, highly testable presentation framework that
(as with Web Forms-based applications) is integrated with existing ASP.NET features, such as master pages and membership-based
authentication.
</div>
</ng-template>
</e-accordionitem>
<e-accordionitem>
<ng-template #header>
<div>JavaScript</div>
</ng-template>
<ng-template #content>
<div>JavaScript (JS) is an interpreted computer programming language.It was originally implemented as part of web browsers
so that client-side scripts could interact with the user, control the browser, communicate asynchronously, and alter
the document content that was displayed.More recently, however, it has become common in both game development and
the creation of desktop applications.</div>
</ng-template>
</e-accordionitem>
</e-accordionitems>
</ejs-accordion>
`
})
export class AppComponent {
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));Multiple
The default expandMode of the Accordion is Multiple. This mode allows multiple items to be expanded simultaneously. Clicking an expanded item toggles it to collapse, without affecting other expanded items.
For large datasets in Multiple mode, consider performance optimization techniques, such as enabling virtualization, to ensure smooth rendering.
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccordionModule } from '@syncfusion/ej2-angular-navigations'
import { Component, ViewChild } from '@angular/core';
@Component({
imports: [
AccordionModule
],
standalone: true,
selector: 'app-container',
template: `
<ejs-accordion expandMode='Multiple'>
<e-accordionitems>
<e-accordionitem expanded='true'>
<ng-template #header>
<div>ASP.NET</div>
</ng-template>
<ng-template #content>
<div>Microsoft ASP.NET is a set of technologies in the Microsoft .NET Framework for building Web applications and XML Web
services. ASP.NET pages execute on the server and generate markup such as HTML, WML, or XML that is sent to a desktop
or mobile browser. ASP.NET pages use a compiled,event-driven programming model that improves performance and enables
the separation of application logic and user interface.</div>
</ng-template>
</e-accordionitem>
<e-accordionitem>
<ng-template #header>
<div>ASP.NET MVC</div>
</ng-template>
<ng-template #content>
<div>The Model-View-Controller (MVC) architectural pattern separates an application into three main components: the model,
the view, and the controller. The ASP.NET MVC framework provides an alternative to the ASP.NET Web Forms pattern for
creating Web applications. The ASP.NET MVC framework is a lightweight, highly testable presentation framework that
(as with Web Forms-based applications) is integrated with existing ASP.NET features, such as master pages and membership-based
authentication.
</div>
</ng-template>
</e-accordionitem>
<e-accordionitem>
<ng-template #header>
<div>JavaScript</div>
</ng-template>
<ng-template #content>
<div>JavaScript (JS) is an interpreted computer programming language.It was originally implemented as part of web browsers
so that client-side scripts could interact with the user, control the browser, communicate asynchronously, and alter
the document content that was displayed.More recently, however, it has become common in both game development and
the creation of desktop applications.</div>
</ng-template>
</e-accordionitem>
</e-accordionitems>
</ejs-accordion>
`
})
export class AppComponent {
}import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));