Create collapse expand list in react

by vsasikalabe Updated: Jan 24, 2023

The collapse component is used to show and hide content. Buttons or anchors are used as triggers that are mapped to specific elements you toggle. Collapsing an element will animate the height from its current value to 0.The constructor is a method used to initialize an object's state in a class. It automatically called during the creation of an object in a class.To render a list dynamically in React, we start by adding a property to the state object. We can populate that property with an array of strings like so. Great. Now we want to move to the render() method to render each list item dynamically.The stopPropagation() method of the Event interface prevents further propagation of the current event in the capturing and bubbling phases. It does not, however, prevent any default behaviors from occurring; for instance, clicks on links are still processed.

Preview of the output that you will get on running this code from your IDE.

Code:

In this solution we use the React library.

How to create collapse expand list in react

JavaScriptLines of Code : 64License : CC BY-SA 4.0

class App extends Component {
  constructor() {
    super();
    this.state = {
        activeCollapse: 'circulars'
    };
  }

  handleExpandCollaps = (name) => {
    if (this.state.activeCollapse === name) {
        this.setState({ activeCollapse: '' })
    } else {
        this.setState({ activeCollapse: name })
    }
  }

  moreInfoClick = (e) => {
    e.stopPropagation();
    console.log("clicked");
  }
  render() {
    return (
      <div>
        <div className="sidebar-nav">
          <div className="sidebar-nav-menu">

            <div className={`sidebar-nav-menu-item ${this.state.activeCollapse === "circulars" ? 'item-active' : ''}`} onClick={() => this.handleExpandCollaps("circulars")} data-id="circulars" >
              <div className="sidebar-nav-menu-item-head">
                <span className="sidebar-nav-menu-item-head-title">Circulars</span>
                <span className="sidebar-nav-menu-item-head-help">
                  <button type="button" className="btn-help" onClick={this.moreInfoClick}>View more info</button>
                </span>
              </div>
              <div className="sidebar-nav-menu-item-body">BODY CONTENT HERE</div>
            </div>

            <div className={`sidebar-nav-menu-item ${this.state.activeCollapse === "specifications" ? 'item-active' : ''}`} onClick={() => this.handleExpandCollaps("specifications")} data-id="specifications">
              <div className="sidebar-nav-menu-item-head">
                <span className="sidebar-nav-menu-item-head-title">Specifications</span>
                <span className="sidebar-nav-menu-item-head-help">
                  <button type="button" className="btn-help" onClick={this.moreInfoClick}>View more info</button>
                </span>
              </div>
              <div className="sidebar-nav-menu-item-body">BODY CONTENT HERE</div>
            </div>


            <div className={`sidebar-nav-menu-item ${this.state.activeCollapse === "wo" ? 'item-active' : ''}`} onClick={() => this.handleExpandCollaps("wo")} data-id="wo">
              <div className="sidebar-nav-menu-item-head">
                <span className="sidebar-nav-menu-item-head-title">Work Orders</span>
                <span className="sidebar-nav-menu-item-head-help">
                  <button type="button" className="btn-help" onClick={this.moreInfoClick}>View more info</button>
                </span>
              </div>
              <div className="sidebar-nav-menu-item-body">BODY CONTENT HERE</div>
            </div>

          </div>
        </div>
      </div>
    );
  }
}

Instructions

Follow the steps carefully to get the output easily.

Install the Node.js and React on your IDE(preferable Visual Studio Code).
Create React Application using npx create-react-app foldername.
cd foldername.
Open the folder in IDE.
Copy the code using "copy" button above and paste it in App.js file(remove the earlier code from App.js).
Import React,React-dom and style.css.
Add render(<App />, document.getElementById('root')),export default App to the end.
Open the terminal from IDE.
npm start to run the file.

You can also refer this url DEMO for getting the above output.

I hope you found this useful. I have added the link to dependent libraries, version information in the following sections.

I found this code snippet by searching for Create collapse expand list in react in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

The solution is created in VS Code 1.73.1 version.
The solution is tested on Nodejs 16.14.2 version.
react 18.2.0 version.

Using this solution, we are able to Create collapse expand list in react with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to Create collapse expand list in react.