Passing data from parent to child component using React

by Abdul Rawoof A R Updated: Jan 24, 2023

React can be used passing data from a parent component to a child component in various contexts where you must share data between components in a React application.

There are several ways you can pass data from a parent component to a child component in React. Here are a few options:

Pass the data as props: You can transfer data as props from the parent component to the child component (short for "properties"). When rendering the child component, you can provide the data from the parent component as an attribute, and the child component can access the data as a prop.
Use the context API: Instead of manually passing props at each level, you may utilize the context API to convey data through the component tree.
Use a state management library: To store and communicate data throughout your application, you can use a state management library like Redux or MobX. Using these libraries, you can retrieve your data from any program component and store it in a global store.

Your approach will rely on your unique requirements and application design.

Using React, the following code shows how to pass data as props from a parent component to a child component:

Fig 1: Preview of the output that you will get on running this code from your IDE.

Code

In this solution we're using React and React-uikit-button libraries.

React | pass data from parent to child component

Lines of Code : 80License : CC BY-SA 4.0

import React, { Component } from 'react';
import { render } from 'react-dom';
import Parent from './parent';
import Child from './child';
import './style.css';

class App extends Component {
  constructor() {
    super();
    this.state = {
      name: 'React',
      parentTextBoxValue: ''
    };
  }
  handleParentData = (e) => {
this.setState({parentTextBoxValue: e})
  }

  render() {
    return (
      <div>
        <Parent handleData={this.handleParentData} />
        <Child parentTextBoxValue={this.state.parentTextBoxValue}/>
      </div>
    );
  }
}

render(<App />, document.getElementById('root'));

import React, { Component } from 'react';
import Button from 'react-uikit-button';

class Parent extends Component {

constructor(props){
    super(props);
    this.state={TextBoxValue: ""}
}   

  SubmitValue = (e) => {
     this.props.handleData(this.state.TextBoxValue)
  }

   onChange=(e)=>{
this.setState({TextBoxValue: e.target.value})
   } 
  render() {
    return (
      <div className="">
        <input type="text" name="TextBox"  onChange={this.onChange}
         />
        <Button onClick={this.SubmitValue}>Submit Value</Button>
      </div>
    );
  }
}

export default Parent;

import React, { Component } from 'react';

class Child extends Component {

    constructor(props){
        super(props);
    }


  render() {
    return (
      <div className="App">
       <p>{this.props.parentTextBoxValue}</p>
      </div>
    );
  }
}

export default Child;

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.
Install npm install react-uikit-button --save.
Open the folder in IDE.
Copy the code using "copy" button above then create a file in the name of parent.js and paste it in parent.js file.(refer demo for additional files).
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 'how to pass data from parent to child component using ReactJs' 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 Visual Studio Code 1.73.1.
The solution is tested on node v18.12.1 and npm v8.19.2.
React version-18.2.0.
React-uikit-button version: current.

Using this solution, we are able to pass the data from parent to child component using ReactJs 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 pass the data from parent to child component using ReactJs.