ReactJs: How to pass data from one component to another?

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10 Answers

componentreactjs
90%

There can be multiple ways of passing data from one component to another :,You can use props to pass data from parent to child component. Example 1 illustrates the sample code for this. ,Example #1 — Using Props to pass data from Parent Component to Child Component

| -- - App.js |
   -- --ParentComponent |
   -- --ChildComponent
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88%

For passing data from parent to child component, we use props. Props data is sent by the parent component and cannot be changed by the child component as they are read-only.,For passing the data from the child component to the parent component, we have to create a callback function in the parent component and then pass the callback function to the child component as a prop. This callback function will retrieve the data from the child component. The child component calls the parent callback function using props and passes the data to the parent component.,In this article, We are going to see how to pass data from one component to another component. We have multiple ways of passing data among components. We can pass data from parent to child, from child to parent, and between siblings. So now let’s see how can we do so.

Step 1:
npx create - react - app myapp
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72%

From Child to Parent Using Callbacks,In the Parent.js, set a callback function to take in the parameter that you have accessed from the child.,From Parent to Child Using Props

1 App
2└── Parent
3├── Child1
4└── Child2
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65%

How to beat a vastly superior opponent? ,And transfer this data to your BigTextMobile component from state:, How to refer to particular years in a specific century in one expression?

To simplify the solution you can do something like this:

<BigText onChange={data => {this.setState({ data })}} />
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75%

One Component:

render() {
  return (
     <Two myProp={this.state.data} />
  )
}

And read this in 'Two' component:

render() {
  return (
     <div>Received data from parent Component: {this.props.myProp}</div>
  )
}

Before you call 'Two' component into 'One' you must import that file

import Two from './path/to/component';
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40%

This one is somewhat trickier. ,Firstly, let's pass data between a parent component and a child component. .,First, you need to create a function in the parent component called  childToParent and an empty state named data.

import React from 'react'

export default function Parent() {
  return (
    <div>
      
    </div>
  )
}
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22%

Props are used for passing data between the components. We usually use it to pass data from the parent component to the child component.,You can use props to pass data from parent to child component. Example 1 illustrates the sample code for this.,Example #1 — Using Props to pass data from Parent Component to Child Component

You can use props to pass data from parent to child component. Example 1 illustrates the sample code for this.

| -- - App.js | -- --ParentComponent | -- --ChildComponent
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60%

Now we have seen how to pass the data from Parent to Child and child to parent components.,Now Employee is the Parent and Salary Component is the Child. Parent Component is passing the Data to Child Components through properties.,And in EmployeeComponent we will use the above Components.

Lets Open Index.js file, Create Employee Component which will display Employee Details. To save our time, I have kept the Code ready by copying from out last sessions and pasting it here.

class Employee extends React.Component{

  constructor(props){
    super(props);
  }  
  render(){
    return <div>
      <h1>Employee Component...</h1>
    <p>
        <label>Id : <b>{this.props.Id}</b></label>
    </p>
      <p>
        <label>Name : <b>{this.props.Name}</b></label>
    </p>
      <p>
        <label>Location : <b>{this.props.Location}</b></label>
    </p>
      <p>
        <label>Total Salary : <b>{this.props.Salary}</b></label>
    </p>
      </div>
  }
}
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48%

 Pretag team - issue, fix, solve, resolve
23%

Let us focus first on the most simple ways of passing data from one component to another. And, to make it more fun, we’ll use Pokemon!,Passing values from a parent component to a child component is easy. You just need to pass the values as props of the child element. To demonstrate that, the code below represents the part where the trainers choose the Pokemon they are going to send to battle. In this case, a Squirtle and a Charmander.,And that’s it! The Pokemon component (child) passed data to the GameManager (parent).

Setup

/n

First, let us create a new react application. Click here and it will send you to the create-react-app repository, a tool that let you create a new react application in no time. All the instructions can be found there. Then, create a react application (you can call it pokemon-battle). After that, inside the src folder, create a components folder and inside of it, a Pokemon and a GameManager folder. Each one must have an index.jsx file, where our components will be written.

create - react - app

Setup

/n

First, let us create a new react application. Click here and it will send you to the create-react-app repository, a tool that let you create a new react application in no time. All the instructions can be found there. Then, create a react application (you can call it pokemon-battle). After that, inside the src folder, create a components folder and inside of it, a Pokemon and a GameManager folder. Each one must have an index.jsx file, where our components will be written.

pokemon - battle

Setup

/n

First, let us create a new react application. Click here and it will send you to the create-react-app repository, a tool that let you create a new react application in no time. All the instructions can be found there. Then, create a react application (you can call it pokemon-battle). After that, inside the src folder, create a components folder and inside of it, a Pokemon and a GameManager folder. Each one must have an index.jsx file, where our components will be written.

src

Setup

/n

First, let us create a new react application. Click here and it will send you to the create-react-app repository, a tool that let you create a new react application in no time. All the instructions can be found there. Then, create a react application (you can call it pokemon-battle). After that, inside the src folder, create a components folder and inside of it, a Pokemon and a GameManager folder. Each one must have an index.jsx file, where our components will be written.

components

Setup

/n

First, let us create a new react application. Click here and it will send you to the create-react-app repository, a tool that let you create a new react application in no time. All the instructions can be found there. Then, create a react application (you can call it pokemon-battle). After that, inside the src folder, create a components folder and inside of it, a Pokemon and a GameManager folder. Each one must have an index.jsx file, where our components will be written.

Pokemon

Setup

/n

First, let us create a new react application. Click here and it will send you to the create-react-app repository, a tool that let you create a new react application in no time. All the instructions can be found there. Then, create a react application (you can call it pokemon-battle). After that, inside the src folder, create a components folder and inside of it, a Pokemon and a GameManager folder. Each one must have an index.jsx file, where our components will be written.

GameManager

Setup

/n

First, let us create a new react application. Click here and it will send you to the create-react-app repository, a tool that let you create a new react application in no time. All the instructions can be found there. Then, create a react application (you can call it pokemon-battle). After that, inside the src folder, create a components folder and inside of it, a Pokemon and a GameManager folder. Each one must have an index.jsx file, where our components will be written.

index.jsx
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