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Lifting state up in ReactJS

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pra's play answered on May 4, 2022 Popularity 8/10 Helpfulness 2/10

answer Lifting state up in ReactJS

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Lifting state up in ReactJS

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"Lifting State Up" is a concept in React where you move the state from a
component to its closest common ancestor. This is often done to share state
between multiple components or to manage the state in a higher-level 
component that can pass down the state and callbacks as props to its 
children.

##Example
import React, { useState } from 'react';

// Child Component
function ChildComponent(props) {
  return (
    <div>
      <p>Count: {props.count}</p>
      <button onClick={props.onIncrement}>Increment</button>
    </div>
  );
}

// Parent Component
function ParentComponent() {
  const [count, setCount] = useState(0);

  const handleIncrement = () => {
    setCount(count + 1);
  };

  return (
    <div>
      <h2>Parent Component</h2>
      <ChildComponent count={count} onIncrement={handleIncrement} />
    </div>
  );
}

export default ParentComponent;

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript lifting reactjs state

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Contributed on Mar 22 2024

pra's play

0 Answers Avg Quality 2/10

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class Calculator extends React.Component {
  constructor(props) {
    super(props);
    this.handleChange = this.handleChange.bind(this);
    this.state = {temperature: ''};
  }

  handleChange(e) {
    this.setState({temperature: e.target.value});
  }

  render() {
    const temperature = this.state.temperature;
    return (
      <fieldset>
        <legend>Enter temperature in Celsius:</legend>
        <input
          value={temperature}
          onChange={this.handleChange} />
        <BoilingVerdict
          celsius={parseFloat(temperature)} />
      </fieldset>
    );
  }
}

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: reactjs.org

Tags: javascript j

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Contributed on May 04 2022

Said HR

0 Answers Avg Quality 2/10

lifting state up react

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function Input(props) {
2      return (
3        <input type="text" value={props.value} onChange={props.onInputChange} />
4      );
5    }
6    
7    function Calculator() {
8      const [value, setValue] = useState('');
9    
10      const handleInputChange = (event) => {
11        setValue(event.target.value);
12      };
13    
14      return (
15        <div>
16          <Input value={value} onInputChange={handleInputChange} />
17          <Input value={value} onInputChange={handleInputChange} />
18        </div>
19      );
20    }
21

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: www.dhiwise.com

Tags: javascript j

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Contributed on May 19 2024

Zany Zebra

0 Answers Avg Quality 2/10

Lifting state up in ReactJS

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