ReactJS Reactstrap Collapse Component

Reactstrap is a popular front-end library that is easy to use React Bootstrap 4 components. This library contains the stateless React components for Bootstrap 4. The Collapse component is used as a content area that can be collapsed and expanded. We can use the following approach in ReactJS to use the ReactJS Reactstrap Collapse Component.

Collapse Props:

• inOpen: It is used to show the component.
• children: It is used to pass the children element to this component.
• tag: It is used to denote the tag for our collapse component.
• className: It is used to denote the class name for styling.
• navbar: It is used to indicate whether it is associate with the navbar component or not.
• cssModule: It is used to denote the CSS module for styling.
• innerRef: It is used to denote the inner reference element.
• mountOnEnter: It is used to mount the component as it waits until the first enter transition is triggered.
• unmountOnExit: It is used to unmount the component.
• appear: When the component mounts, it is used to run the collapse-in animation.
• enter: It is used to enable or disable enter transitions
• exit: It is used to enable or disable exit transitions
• timeout: It is used to denote the duration of collapse animation in milliseconds.
• addEndListener: It is used to denote a function that listens to an end event.
• onEnter: It is a callback function that is triggered before the component collapse in.
• onEntered: It is a callback function that is triggered after the has component collapsed in.
• onEntering: It is a callback function that is triggered after the component starts to collapse in.
• onExit: It is a callback function that is triggered before the component collapse out.
• onExited: It is a callback function that is triggered after the component has collapsed out.
• onExiting: It is a callback function that is triggered after the component starts to collapse out.
• baseClass: It is used to denote the class that is always applied to the collapse element.
• baseClassActive: It is used to denote the class applied to the collapse element when it is in an active state.

Creating React Application And Installing Module:

Step 1: Create a React application using the following command:

npx create-react-app foldername

Step 2: After creating your project folder i.e. foldername, move to it using the following command:

cd foldername

Step 3: After creating the ReactJS application, Install the required module using the following command:

npm install reactstrap bootstrap

Project Structure: It will look like the following.

Project Structure

Example: Now write down the following code in the App.js file. Here, App is our default component where we have written our code.

Javascript

import React from 'react'
import 'bootstrap/dist/css/bootstrap.min.css';
import { Collapse, Button } from "reactstrap"

function App() {

    // Collapse Open state
    const [isOpen, setIsOpen] = React.useState(false);

    return (
        <div style={{
            display: 'block', width: 900, padding: 30
        }}>
            <h4>ReactJS Reactstrap Collapse Component</h4>
            <Button color="primary" onClick={() => {
                setIsOpen(!isOpen)
            }}>Toggle Me to see Collapse Component!</Button>
            <Collapse isOpen={isOpen}>
                <p>I am sample Text to display</p>
            </Collapse>
        </div >
    );
}

export default App;

Step to Run Application: Run the application using the following command from the root directory of the project:

npm start

Output: Now open your browser and go to http://localhost:3000/, you will see the following output:

Reference: https://reactstrap.github.io/components/collapse/