Accordion

Lightweight and accessible accordion module with an extensible API. With the module you can create accordion on your website, useful especially for creating FAQ lists.

Version

3.3.4

Installation

npm

Install the package & import files

npm install accordion-js

import Accordion from 'accordion-js';
import 'accordion-js/dist/accordion.min.css';

CDN

Include files using CDN.

https://unpkg.com/accordion-js@3.3.4/dist/accordion.min.css
https://unpkg.com/accordion-js@3.3.4/dist/accordion.min.js

<link rel="stylesheet" href="[CDN CSS URL]">
<script src="[CDN JS URL]"></script>

Github

You can also download files from Github and attach them manually to your project.
Note: On production use files (JS and CSS) only from dist/ folder.

Usage

Include files

See the section above.

Create HTML layout

This is just an example of a layout. You can create your own HTML structure.

<div class="accordion-container">
  <div class="ac">
    <h2 class="ac-header">
      <button type="button" class="ac-trigger">Lorem ipsum dolor sit amet.</button>
    </h2>
    <div class="ac-panel">
      <p class="ac-text">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    </div>
  </div>

  <div class="ac">
    <h2 class="ac-header">
      <button type="button" class="ac-trigger">Lorem ipsum dolor sit amet.</button>
    </h2>
    <div class="ac-panel">
      <p class="ac-text">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    </div>
  </div>

  <div class="ac">
    <h2 class="ac-header">
      <button type="button" class="ac-trigger">Lorem ipsum dolor sit amet.</button>
    </h2>
    <div class="ac-panel">
      <p class="ac-text">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    </div>
  </div>
</div>

Initialize the module

<script>
  new Accordion('.accordion-container');
</script>

API

Examples

new Accordion(container, options)

• container - string | HTMLElement (required), selector of accordion container
• options - object (optional), accordion options

// Default options
new Accordion('.container-first');

// User options
new Accordion('.container-second', {
  duration: 400,
  showMultiple: true,
  onOpen: function(currentElement) {
    console.log(currentElement);
  }
});

// Define several accordions with the same options (pass an array with selectors)
new Accordion(['.container-first', '.container-second'], {});

// or pass an array with HTMLElements
const accordions = Array.from(document.querySelectorAll('.accordion-container'));
new Accordion(accordions, {});

// Detach events
const accordion = new Accordion('.container-first');
accordion.detachEvents();

Options

Option	Type	Default value	Description
duration	number	600	Animation duration in ms
ariaEnabled	boolean	true	Add ARIA elements to the HTML structure
collapse	boolean	true	Allow collapse expanded panel
showMultiple	boolean	false	Show multiple elements at the same time
onlyChildNodes	boolean	true	Disabling this option will find all items in the container. Warning: Setting to false will break the functionality of nested accordions
openOnInit	array	[]	Show accordion elements during initialization
elementClass	string	'ac'	Element class
triggerClass	string	'ac-trigger'	Trigger class
panelClass	string	'ac-panel'	Panel class
activeClass	string	'is-active'	Active element class
beforeOpen	function	-	Calls before the item is opened. beforeOpen: (currElement) => {}
onOpen	function	-	Calls when the item is opened. onOpen: (currElement) => {}
beforeClose	function	-	Calls before the item is closed. beforeClose: (currElement) => {}
onClose	function	-	Calls when the item is closed. onClose: (currElement) => {}

Methods

Option	Description	Arguments
attachEvents()	Attach events	-
detachEvents()	Detach events	-
open()	Open the accordion element with the given idx E.g. acc.open(1)	idx - element index
close()	Close the accordion element with the given idx E.g. acc.close(1)	idx - element index
toggle()	Toggle the accordion element with the given idx E.g. acc.toggle(1)	idx - element index
openAll()	Open all accordion elements (without animation)	-
closeAll()	Close all accordion elements (without animation)	-
update()	If there are new items added by lazy load, you can run this method to update the Accordion	-
destroy()	Destroy accordion instance: Open elements, remove events, IDs & ARIA	-

v3 Release Info

There have been a lot of changes to the API in version 3.0.0, so if you are using previous versions of the accordion (2.8.0 and below), I recommend updating the package to the latest version with new structure and options.