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What are props in React?

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Sumit Rawal answered on September 19, 2021 Popularity 10/10 Helpfulness 2/10

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What are props in React?

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Props are inputs to components. They are single values or objects containing a set of values that are passed to components on creation using a naming convention similar to HTML-tag attributes. They are data passed down from a parent component to a child component.

The primary purpose of props in React is to provide following component functionality:

Pass custom data to your component.

Trigger state changes.

Use via this.props.reactProp inside component's render() method.

For example, let us create an element with reactProp property:

This reactProp (or whatever you came up with) name then becomes a property attached to React's native props object which originally already exists on all components created using React library.

props.reactProp

import React from "react";
import ReactDOM from "react-dom";

class ChildComponent extends React.Component {
  render() {
    return (
      <div>
        <p>{this.props.name}</p>
        <p>{this.props.age}</p>
      </div>
    );
  }
}

class ParentComponent extends React.Component {
  render() {
    return (
      <div>
        <ChildComponent name="John" age="30" />
        <ChildComponent name="Mary" age="25" />
      </div>
    );
  }
}

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Tags: javascript

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Contributed on Feb 16 2023

Sumit Rawal

0 Answers Avg Quality 2/10

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react props

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function Welcome(props) {
  return <h1>Hello, {props.name}</h1>;
}

function App() {
  return (
    <div>
      <Welcome name="Sara" />
      <Welcome name="Cahal" />
      <Welcome name="Edite" />
    </div>
  );
}

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Source: reactjs.org

Tags: javascript j

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Contributed on Sep 20 2022

Showrove Roy

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React props

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function Application() {
  const userName = "John Smith";
  return <UserInfo userName={userName} />;
}
function UserInfo({ userName }) {
  return <span>{userName}</span>;
}

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Contributed on Jun 09 2022

Mateusz Przybylski

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react props

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function App() {
  return <User name="John Doe" />
}

function User(props) {
  return <h1>Hello, {props.name}</h1>; // Hello, John Doe!
}

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Contributed on Jun 07 2022

Zany Zebra

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Props example in react

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const Banner = props => {
  const name = props.name
  return <div>Hello {name}</div>
}

function App() {
  return (
    <div>
      <Banner name="Ranjeet" />
    </div>
  )
}

export default App

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Contributed on Apr 10 2022

Outrageous Ostrich

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props

Comment

class Checkbox extends React.Component {
  constructor(props) {
    super(props);
    this.state = { isOn: true };
  }
  // ...
}

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Contributed on Feb 20 2022

Doubtful Dingo

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React js props

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function App() {
  return (
    <div className="App">
      <NewComponent name="Ariful Islam Adil" profession="Web-Developer"></NewComponent>
    </div>
  );
}

function NewComponent(props) {
  return (
    <div className="test-class">
      <h1>Name: {props.name}</h1>
      <h3>Profession: {props.profession}</h3>
    </div>
  )
}
export default App;

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Contributed on Sep 19 2021

Ariful Islam Adil(Code Lover)

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react props example

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export function Card(props) {
  return (
    <div>
      <h2>{props.name}</h2>
      <p>{props.description}</p>
    </div>
  );
}

import { Card } from './Card.jsx';

export function App() {
  return (
    <Card
      name="Madalena Rocha"
      description="Desenvolvedora Front-end"
    />
  );
}

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Contributed on Oct 10 2023

Madalena Machado Rocha

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props in react

Comment

 function App() {

  return (
    <div className="App">
      <Job salary={90000} position="Senior SDE" company="Amazon" />
      <Job salary={12000} position="Junior SDE" company="Google" />
      <Job salary={10000} position="Project Manager" company="Netflix" />
 
    </div>
  );
}

const Job = (props) => {
  return (
    <div>
      <h1>{props.salary}  </h1>
      <h1>{props.position}  </h1>
      <h1>{props.company}  </h1>
</div>    

  )
}

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Contributed on Feb 25 2023

Bello Bambo

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what is props in react

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// ParentComponent.js
import React from 'react';
import ChildComponent from './ChildComponent';

const ParentComponent = () => {
  const name = 'John';
  const age = 25;

  return (
    <div>
      <ChildComponent name={name} age={age} />
    </div>
  );
};

export default ParentComponent;

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Contributed on Jul 17 2023

Thomas Brito

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What are props in React?

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