Syncfusion React Accordion

Implementing Syncfusion React Accordion

The React Accordion component provides a clean, organized way to display content in collapsible panels. It's perfect for creating expandable content sections, FAQs, multi-step forms, and navigation menus with minimal code.

Component Overview

The Accordion component renders a stack of collapsible panels where:

• Each panel has a header (clickable to toggle) and content area
• Headers can be simple text or custom templates
• Content can be static, dynamic, or rendered from other React components
• Supports single expand mode (one panel at a time) or multiple (many panels at once)
• Built-in animations for smooth expand/collapse transitions
• Full keyboard navigation and accessibility support

Documentation and Navigation Guide

Getting Started

📄 Read: references/getting-started.md

When to read: First time setting up the Accordion component

• Package installation (@syncfusion/ej2-react-navigations)
• CSS imports and theme configuration (Tailwind, Bootstrap)
• Two initialization methods (Items API vs HTML markup)
• Item configuration (header, content, cssClass, disabled, expanded)
• Basic component setup with examples
• First render and minimal working example

Expand Modes

📄 Read: references/expand-modes.md

When to read: Controlling which panels expand at the same time

• Single expand mode (only one panel open at a time)
• Multiple expand mode (default, many panels can be open)
• Setting initial expanded state with expandedIndices property
• Toggle behavior on header click
• Use cases for choosing each mode
• Keeping single pane open always pattern

Animation Effects

📄 Read: references/animation-effects.md

When to read: Customizing panel transitions and visual effects

• Default animations (SlideDown for expand, SlideUp for collapse)
• Choosing from available animation effects (FadeIn, ZoomIn, etc.)
• Configuring easing and duration properties
• Separate expand/collapse animation control
• Disabling animations entirely
• Performance considerations

Content Loading

📄 Read: references/content-loading.md

When to read: Loading content dynamically or from external sources

• Loading accordion items dynamically with addItem() method
• Loading content from data sources (dataSource property)
• Fetching content via HTTP requests and POST
• Template-based rendering (headerTemplate, itemTemplate)
• Rendering other React components inside panels
• Lazy loading and deferred content patterns

Events & Lifecycle

📄 Read: references/events-lifecycle.md

When to read: Handling user interactions and component lifecycle

• Component lifecycle events (created, destroyed)
• Expand/collapse events (expanding, expanded)
• Click event handling (clicked)
• Event arguments and properties
• Preventing default actions with event.cancel
• Real-world event patterns and examples

Styling & Customization

📄 Read: references/styling-customization.md

When to read: Customizing appearance and integrating with design systems

• CSS classes for styling (header, panel, content areas)
• Built-in theme options and theme switching
• Custom styling with CSS and utilities (Tailwind, Bootstrap)
• RTL (right-to-left) support
• Responsive design patterns
• Using cssClass property for custom styling

Advanced Features

📄 Read: references/advanced-features.md

When to read: Building complex layouts and optimizing performance

• Component methods (expandItem, enableItem, hideItem, etc.)
• Nested accordions and hierarchical structures
• React hooks integration (useState, useRef, useEffect)
• Keyboard navigation behavior
• Accessibility features (ARIA attributes, screen readers)
• Performance optimization for large accordion lists
• Custom expand/collapse action patterns

Quick Start Example

Basic accordion with three collapsible panels:

import React from 'react';
import { AccordionComponent, AccordionItemDirective, AccordionItemsDirective } from '@syncfusion/ej2-react-navigations';
import '@syncfusion/ej2-base/styles/tailwind3.css';
import '@syncfusion/ej2-buttons/styles/tailwind3.css';
import '@syncfusion/ej2-popups/styles/tailwind3.css';
import '@syncfusion/ej2-react-navigations/styles/tailwind3.css';

export default function App() {
  return (
    <AccordionComponent expandMode='Multiple'>
      <AccordionItemsDirective>
        <AccordionItemDirective 
          header='HTML' 
          content='HTML is a markup language used to create web pages.' 
        />
        <AccordionItemDirective 
          header='CSS' 
          content='CSS is used to style HTML elements and create layouts.' 
        />
        <AccordionItemDirective 
          header='JavaScript' 
          content='JavaScript adds interactivity to web applications.' 
        />
      </AccordionItemsDirective>
    </AccordionComponent>
  );
}

Common Patterns

Pattern 1: FAQ Section (Single Expand Mode)

Questions automatically collapse when a new one is opened:

<AccordionComponent expandMode='Single'>
  <AccordionItemsDirective>
    <AccordionItemDirective header='What is React?' content='React is a JavaScript library for building UIs with components.' />
    <AccordionItemDirective header='What is JSX?' content='JSX is a syntax extension for writing HTML-like code in JavaScript.' />
  </AccordionItemsDirective>
</AccordionComponent>

Pattern 2: Persistent Expansion (Multiple Mode)

All panels can remain expanded simultaneously:

<AccordionComponent expandMode='Multiple'>
  <AccordionItemsDirective>
    <AccordionItemDirective expanded={true} header='Features' content='...' />
    <AccordionItemDirective expanded={true} header='Installation' content='...' />
  </AccordionItemsDirective>
</AccordionComponent>

Pattern 3: Default Expanded State

Pre-expand specific panels on load:

<AccordionItemDirective 
  expanded={true}
  header='Quick Start' 
  content='This section opens by default.' 
/>

Key Props & Methods

Component Properties

Item Properties

Component Methods