How to toggle only one item in react?

Question

I am making a collapsible section using reactstrap Collapse.

The data received are nested and I am in the need to display the collapse button at second level and the third level will have the data to be displayed.

No problem in this level of display and it already display the data at third level on click of button.

Problem: On click of any button, all the collapsible section gets opened instead of the clicked one.

Requirement: Only the clicked section's token(s) needs to get displayed and on click of the button again it should be collapsed back and it should not have any relation with any other items.

Working Snippet as follows,

const data = [{"orderId":1,"orderNo":"123", "orderParts":[{"orderPartsId":1,"orderPrtNo":"OP-1", "regTokens":["Token1", "Token2","Token3"]}] },
{"orderId":2,"orderNo":"456", "orderParts":[{"orderPartsId":1,"orderPrtNo":"OP-1", "regTokens":["Token1","Token3"]}] },
{"orderId":3,"orderNo":"789", "orderParts":[{"orderPartsId":1,"orderPrtNo":"OP-1", "regTokens":["Token1", "Token2","Token3", "Token4"]}] }
]

const {Component, Fragment} = React;
const {Button, Collapse} = Reactstrap;

class Menu extends Component {
  constructor(props) {
    super(props);
    this.state = {
      open: false
    };
  }
  
  toggle = () =>
  this.setState(s => ({
    open: !s.open
  }));

  render() {
  console.log();
    return <div> 
      {
        data.map((levelOneItem, i) => {
          return(
          <div>
          <div> Order Id:  {levelOneItem.orderId} </div>
          {
            levelOneItem.orderParts.map((levelTwoItem, j) => {
               return(
                  <div>
                  <div> Order Part Id: {levelTwoItem.orderPartsId} </div>
                  <Button onClick={this.toggle}>Display Token</Button>
                  <Collapse isOpen={this.state.open}>
                    {
                       <div>
                        {levelTwoItem.regTokens.map((levelThreeItem, k) => {
                          return(<span> {levelThreeItem} </span>)
                        })
                     }
                       </div>
                    }
                  </Collapse>
                  </div>
               )
            })
          }
          </div>
          )
        })
      }
    </div>;
  }

}


ReactDOM.render(<Menu />, document.getElementById("root"));

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.4.1/css/bootstrap.min.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/reactstrap/8.4.1/reactstrap.min.js"></script>

<div id="root"></div>

Kindly help me to achieve the result of toggling only on the selected item for the nested data provided.

Answer 1

Add an identifying index as params for your handler function would be fine.

this.state = {
  open: ''
};

toggle = idx => () => {
  this.setState(prevState => ({open: prevState.open === idx ? '' : idx}));
}

<Button onClick={this.toggle(i)}>
<Collapse isOpen={open === i}>

---

Update

If you want them to be independent, you need an Array to store each status instead.

this.state = {
  open: [0, 2]                                // Initial opened item's index
};

toggle = idx => () => {
  this.setState(prevState => ({
    open: this.state.open.includes(idx)       // check whether been expanded
      ? prevState.open.filter(x => x !== idx) // if yes, remove from list
      : [...prevState.open, idx]}             // if no, add to list
    ))
}

<Button onClick={this.toggle(i)}>
<Collapse isOpen={open.includes(i)}>

const data = [{"orderId":1,"orderNo":"123", "orderParts":[{"orderPartsId":1,"orderPrtNo":"OP-1", "regTokens":["Token1", "Token2","Token3"]}] },
{"orderId":2,"orderNo":"456", "orderParts":[{"orderPartsId":1,"orderPrtNo":"OP-1", "regTokens":["Token1","Token3"]}] },
{"orderId":3,"orderNo":"789", "orderParts":[{"orderPartsId":1,"orderPrtNo":"OP-1", "regTokens":["Token1", "Token2","Token3", "Token4"]}] }
]

const {Component, Fragment} = React;
const {Button, Collapse} = Reactstrap;

class Menu extends Component {
  constructor(props) {
    super(props);
    this.state = {
      open: [0, 2]  // Initial opened item's index
    };
  }
  
  toggle = idx => () => {
    this.setState(prevState => ({open: this.state.open.includes(idx) ? prevState.open.filter(x => x !== idx) : [...prevState.open, idx]})
  )}
  render() {
  const { open } = this.state;
    return <div> 
      {
        data.map((levelOneItem, i) => {
          return(
          <div>
          <div> Order Id:  {levelOneItem.orderId} </div>
          {
            levelOneItem.orderParts.map((levelTwoItem, j) => {
               return(
                  <div>
                  <div> Order Part Id: {levelTwoItem.orderPartsId} </div>
                  <Button onClick={this.toggle(i)}>Display Token</Button>
                  <Collapse isOpen={open.includes(i)}>
                    {
                       <div>
                        {levelTwoItem.regTokens.map((levelThreeItem, k) => {
                          return(<span> {levelThreeItem} </span>)
                        })
                     }
                       </div>
                    }
                  </Collapse>
                  </div>
               )
            })
          }
          </div>
          )
        })
      }
    </div>;
  }

}


ReactDOM.render(<Menu />, document.getElementById("root"));

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.4.1/css/bootstrap.min.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/reactstrap/8.4.1/reactstrap.min.js"></script>

<div id="root"></div>