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Manage State for Multiple Inputs on React

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by Abdul Rawoof A R dot icon Updated: Mar 27, 2023

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Manage state in React is nothing but a process for managing the data information from the user that React components need to render themselves. 


To handle multiple input elements, we can add a name attribute to each element and let the handler function select what to do based on the value of the event.target.name in React. To access multiple values entered in input fields, use the following method, var input = document and the document, getElementsByName('array[]');. To get multiple inputs from a user, use the split() method. The separator parameter helps to break the input by the specified separator. Whitespace is the specified separator by default. If we need to create a function with two inputs from the user, we must provide two different arguments inside the function. 


To manage multiple inputs in React, 

  1. Initialize state and add input default values. Then, let's add default values to ALL input fields. 
  2. To handle multiple input changes, the goal is here to handle ALL input with a single onChange handler in React. 
  3. Finally, add the handleInputChange to the input fields. 


Here is an example of how you can manage the state for multiple inputs on React:

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

Code

In this solution we're using React library.

React : How to manage state for multiple input types

JavaScriptdotLines of Code : 83dotLicense : Strong Copyleft (CC BY-SA 4.0)

class PlayersPage extends React.Component {
    constructor(props) {
        super(props);
        this.changeRecord = this.changeRecord.bind(this);
        this.state = {
            playerData: [
                {
                    "dataKey": "300",
                    "playerFirstName": "Roger",
                    "playerLastName": "Federer",
                    "playerRanking": "1"
                },
                {
                    "dataKey": "301",
                    "playerFirstName": "Rafael",
                    "playerLastName": "Nadal",
                    "playerRanking": "2"                    
                }           
            ]
        };
    }

    changeRecord(record, event) {
      console.log(event.currentTarget.value);
      console.log(record);
      this.setState({
        // Write your logic to update the playerDate value accordingly
      });
    }

    render() {
        return (
            <div className="container">
                <PlayerTable recordChangeHandler={this.changeRecord} tableData={this.state.playerData} />;
            </div>
        );
    }
}



class PlayerTable extends React.Component {
    render() {
        const rows = [];
        this.props.tableData.forEach((rowData) => {
            rows.push(<PlayerRow recordChangeHandler={this.props.recordChangeHandler} key={rowData.dataKey} rowData={rowData} />);
        });
        return (
            <div className="table-responsive">
                <table className="table table-condensed">
                    <thead>
                        <tr>
                            <th>First Name</th>
                            <th>Last Name</th>
                            <th>Ranking</th>
                        </tr>
                    </thead>
                    <tbody>
                        {rows}
                    </tbody>
                </table>
            </div>
        );
    }
}

class PlayerRow extends React.Component {
    render() {
        return (
            <tr>
                <td><input type="text" onChange={this.props.recordChangeHandler.bind(this, this.props.rowData)} defaultValue={this.props.rowData.playerFirstName} /></td>
                <td><input type="text" onChange={this.props.recordChangeHandler} defaultValue={this.props.rowData.playerLastName} /></td>
                <td><input type="text" onChange={this.props.recordChangeHandler} defaultValue={this.props.rowData.playerRanking} /></td>
            </tr>
        );
    }
}

ReactDOM.render(
  <PlayersPage />,
  document.getElementById('container')
);

Instructions

Follow the steps carefully to get the output easily.

  1. Install the Node.js and React on your IDE(preferable Visual Studio Code).
  2. Create React Application using npx create-react-app foldername.
  3. cd foldername.
  4. Open the folder in IDE.
  5. Copy the code using "copy" button above and paste it in index.js file(remove the earlier code from index.js).
  6. Import React and ReactDOM in index.js file.
  7. Open the terminal from IDE.
  8. npm start to run the file.


Note: Replace 'getElementById('container') with 'getElementById('root').


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 'how to manage state for multiple inputs on 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.

  1. The solution is created in Visual Studio Code 1.73.1.
  2. The solution is tested on node v18.12.1 and npm v8.19.2.
  3. React version-18.2.0.


Using this solution, we are able to manage state for multiple inputs on 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 manage state for multiple inputs on React.

Dependent Library

reactby facebook

JavaScript doticonstar image 209050 doticonVersion:v18.2.0doticon
License: Permissive (MIT)

The library for web and native user interfaces

Support
    Quality
      Security
        License
          Reuse

            reactby facebook

            JavaScript doticon star image 209050 doticonVersion:v18.2.0doticon License: Permissive (MIT)

            The library for web and native user interfaces
            Support
              Quality
                Security
                  License
                    Reuse

                      You can also search for any dependent libraries on kandi like 'react'.

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