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

3.4.1

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@3.4.1/dist/accordion.min.css
https://unpkg.com/accordion-js@3.4.1/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. <br> 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 | Array<string | HTMLElement> (required), A selector string, a DOM element, or an array of selector strings or HTMLElements that specify the accordion container(s).
• options - object (optional), Configuration options for the accordion. See the table below for available 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 | 500 | 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. <br> beforeOpen: (currElement) => {} | | onOpen | function | - | Calls when the item is opened. <br> onOpen: (currElement) => {} | | beforeClose | function | - | Calls before the item is closed. <br> beforeClose: (currElement) => {} | | onClose | function | - | Calls when the item is closed. <br> onClose: (currElement) => {} |

Methods

| Option | Description | Arguments | | -------------- | ------------------------------------------------------------------------------------------ | --------------------- | | attachEvents() | Attach events | - | | detachEvents() | Detach events | - | | open() | Open the accordion element with the given idx <br> E.g. acc.open(1) | idx - element index | | close() | Close the accordion element with the given idx <br> E.g. acc.close(1) | idx - element index | | toggle() | Toggle the accordion element with the given idx <br> 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: <br> 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.

License

This project is under the MIT license.