# react-collapsible

**Repository Path**: trusted-list/react-collapsible

## Basic Information

- **Project Name**: react-collapsible
- **Description**: React component to wrap content in Collapsible element with trigger to open and close.
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: develop
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2026-09-08
- **Last Updated**: 2026-10-08

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

[![Npm Version](https://img.shields.io/npm/v/react-collapsible.svg?style=flat-square)](https://www.npmjs.com/package/react-collapsible) [![License](https://img.shields.io/npm/l/react-collapsible.svg?style=flat-square)](https://github.com/glennflanagan/react-collapsible/blob/develop/LICENSE.md) [![Downloads Per Week](https://img.shields.io/npm/dw/react-collapsible.svg?style=flat-square)](https://npmcharts.com/compare/react-collapsible)

# React Responsive Collapsible Section Component (Collapsible)

React component to wrap content in Collapsible element with trigger to open and close.

![Alt text](example/img/example.gif)

It's like an accordion, but where any number of sections can be open at the same time.

Supported by [Browserstack](https://www.browserstack.com).

![Browserstack Logo](example/img/browserstack-logo.png 'Browserstack')

---

## Migrating from v1.x to v2.x

Version 2 is 100% API complete to version 1. However, there is a breaking change in the `onOpen` and `onClose` callbacks. These methods now fire at the end of the collapsing animation. There is also the addition of `onOpening` and `onClosing` callbacks which fire at the beginning of the animation.

To migrate to v2 from v1 simply change the `onOpen` prop to `onOpening` and `onClose` to `onClosing`.

## Installation

Install via npm or yarn

```bash
npm install react-collapsible --save

yarn add react-collapsible
```

## Usage

Collapsible can receive any HTML elements or React component as it's children. Collapsible will wrap the contents, as well as generate a trigger element which will control showing and hiding.

```javascript
import React from 'react';
import Collapsible from 'react-collapsible';

const App = () => {
  return (
    <Collapsible trigger="Start here">
      <p>
        This is the collapsible content. It can be any element or React
        component you like.
      </p>
      <p>
        It can even be another Collapsible component. Check out the next
        section!
      </p>
    </Collapsible>
  );
};

export default App;
```

With a little CSS becomes

![Alt text](example/img/becomes.png)

## Properties _(Options)_

### **contentContainerTagName** | _string_ | default: `div`

Tag Name for the Collapsible Root Element.

### **containerElementProps** | _object_

Pass props (or attributes) to the top div element. Useful for inserting `id`.

### **trigger** | _string_ or _React Element_ | **required**

The text or element to appear in the trigger link.

### **triggerTagName** | _string_ | default: span

The tag name of the element wrapping the trigger text or element.

### **triggerStyle** | _object_ | default: null

Adds a style attribute to the trigger.

### **triggerWhenOpen** | _string_ or _React Element_

Optional trigger text or element to change to when the Collapsible is open.

### **triggerDisabled** | _boolean_ | default: false

Disables the trigger handler if `true`. Note: this has no effect other than applying the `.is-disabled` CSS class if you've provided a `handleTriggerClick` prop.

### **triggerElementProps** | _object_

Pass props (or attributes) to the trigger wrapping element. Useful for inserting `role` when using `tabIndex`.

As an alternative to an auto generated id (which is not guaranteed to be unique in extremely fast builds) that is used as the TriggerElement id, and also as a separate `aria-labelledby` attribute, a custom id can be assigned by providing `triggerElementProps` with an object containing an `id` key and value, e.g. `{id: 'some-value'}`.

### **contentElementId** | _string_

Allows for an alternative to an auto generated id (which is not guaranteed to be unique in extremely fast builds) that is used as part of the component id and the `aria-controls` attribute of the component.

### **transitionTime** | _number_ | default: 400

The number of milliseconds for the open/close transition to take.

### **transitionCloseTime** | _number_ | default: null

The number of milliseconds for the close transition to take.

### **easing** | _string_ | default: 'linear'

The CSS easing method you wish to apply to the open/close transition. This string can be any valid value of CSS `transition-timing-function`. For reference view the [MDN documentation](https://developer.mozilla.org/en/docs/Web/CSS/transition-timing-function).

### **open** | _bool_ | default: false

Set to true if you want the Collapsible to begin in the open state. You can also use this prop to manage the state from a parent component.

### **accordionPosition** | _string_

Unique key used to identify the `Collapse` instance when used in an accordion.

### **handleTriggerClick** | _function_

Define this to override the click handler for the trigger link. Takes one parameter, which is `props.accordionPosition`.

### **onOpen** | _function_

Is called when the Collapsible has opened.

### **onClose** | _function_

Is called when the Collapsible has closed.

### **onOpening** | _function_

Is called when the Collapsible is opening.

### **onClosing** | _function_

Is called when the Collapsible is closing.

### **onTriggerOpening** | _function_

Is called when the Collapsible open trigger is clicked. Like onOpening except it isn't called when the open prop is updated.

### **onTriggerClosing** | _function_

Is called when the Collapsible close trigger is clicked. Like onClosing except it isn't called when the open prop is updated.

### **lazyRender** | _bool_ | default: false

Set this to true to postpone rendering of all of the content of the Collapsible until before it's opened for the first time

### **overflowWhenOpen** | _enum_ | default: 'hidden'

The CSS overflow property once the Collapsible is open. This can be any one of the valid CSS values of `'hidden'`, `'visible'`, `'auto'`, `'scroll'`, `'inherit'`, `'initial'`, or `'unset'`

### **contentHiddenWhenClosed** | _bool_ | default: false

Set this to true to add the html hidden attribute to the content when the collapsible is fully closed.

### **triggerSibling** | _element_ | default: null

Escape hatch to add arbitrary content on the trigger without triggering expand/collapse. It's up to you to style it as needed. This is inserted in component tree and DOM directly
after `.Collapsible__trigger`

### **tabIndex** | _number_ | default: null

A `tabIndex` prop adds the `tabIndex` attribute to the trigger element which in turn allows the Collapsible trigger to gain focus.

## CSS Class String Props

### **classParentString** | _string_ | default: Collapsible

Use this to overwrite the parent CSS class for the Collapsible component parts. Read more in the CSS section below.

### **className** | _string_

`.Collapsible` element (root) when closed

### **openedClassName** | _string_

`.Collapsible` element (root) when open

### **triggerClassName** | _string_

`.Collapsible__trigger` element (root) when closed

### **triggerOpenedClassName** | _string_

`.Collapsible__trigger` element (root) when open

### **contentOuterClassName** | _string_

`.Collapsible__contentOuter` element

### **contentInnerClassName** | _string_

`.Collapsible__contentInner` element

## CSS Styles

In theory you don't need any CSS to get this to work, but let's face it, it'd be pretty rubbish without it.

By default the parent CSS class name is `.Collapsible` but this can be changed by setting the `classParentString` property on the component.

The CSS class names follow a [type of BEM pattern](http://getbem.com/introduction/) of CSS naming. Below is a list of the CSS classes available on the component.

### `.Collapsible`

The parent element for the components.

### `.Collapsible__trigger`

The trigger link that controls the opening and closing of the component.
The state of the component is also reflected on this element with the modifier classes;

- `is-closed` | Closed state
- `is-open` | Open setState
- `is-disabled` | Trigger is disabled

### `.Collapsible__contentOuter`

The outer container that hides the content. This is set to `overflow: hidden` within the javascript but everything else about it is for you to change.

### `.Collapsible__contentInner`

This is a container for the content passed into the component. This keeps everything nice and neat and allows the component to do all it's whizzy calculations.

If you're using a CSS framework such as Foundation or Bootstrap, you probably want to use their classes instead of styling `.Collapsible`. See Properties above.

## Example

Examples of `<Collapsible />` components can be found in the `./example` folder. To get the example running:

```
cd example && yarn && yarn start
```

This will run a [parceljs](https://parceljs.org) app.

## Issues

Please create an issue for any bug or feature requests.

Here is a plain [JSFiddle](https://jsfiddle.net/sm7n31p1/1/) to use for replicating bugs.

## Licence

React Responsive Collapsible Section Component is [MIT licensed](LICENSE.md)