JAVASCRIPT

react state hooks

import React, { useState } from 'react';

function Example() {
  // Declare a new state variable, which we'll call "count"  
  const [count, setCount] = useState(0);
  
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

usestate hook react

import React, { useState } from 'react'
import { render } from 'react-dom'

const randomDiceRoll = () => {
  return Math.floor(Math.random() * 6) + 1
}

export default function App() {
  const [diceRolls, setDiceRolls] = useState([1, 2, 3])

  return (
    <div>
      <button
        onClick={() => {
          setDiceRolls([...diceRolls, randomDiceRoll()])
        }}
      >
        Roll dice
      </button>
      <ul>
        {diceRolls.map((diceRoll, index) => (
          <li key={index}>{diceRoll}</li>
        ))}
      </ul>
    </div>
  )
}

render(<App />, document.querySelector('#app'))

usestate react

import React, { useState } from 'react';

function Example() {
	
  const [count, setCount] = useState(0);
  
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  );
}

react hook usestate

function Counter({initialCount}) {
  const [count, setCount] = useState(initialCount);
  return (
    <>
      Count: {count}
      <button onClick={() => setCount(initialCount)}>Reset</button>
      <button onClick={() => setCount(prevCount => prevCount - 1)}>-</button>
      <button onClick={() => setCount(prevCount => prevCount + 1)}>+</button>
    </>
  );
}

React useState Hook

import { useState } from "react"