“Usestate no React” Respostas de código

reagir usestate

// Initialize useState.
const [stateVar, setStateVar] = useState();

// The useState parameters define the default value of stateVar.
useState(); // stateVar === undefined
useState(true); // stateVar === true
useState('Hamburger'); // stateVar === 'Hamburger'

// setStateVar is a function that sets the value of stateVar.
setStateVar(value);

// stateVar is equal to the value that was set in the setStateVar-function.
stateVar

/* 
Example usage - Everytime you run toggleActive, the isActive
variable will toggle between false and true.
*/
const [isActive, setIsActive] = useState(false);

function toggleActive() {
	setIsActive(!isActive);
}
9gram panter

Reacione o gancho de usestate

import { useState } from "react"
naly moslih

uso

function ExampleWithManyStates() {
  const [age, setAge] = useState(42);
  const [fruit, setFruit] = useState('banana');
  const [todos, setTodos] = useState([{ text: 'Learn Hooks' }]);
dev_ade

Usestate no React

function handleOrangeClick() {
    // Similar to this.setState({ fruit: 'orange' })
    setFruit('orange');
  }
Cautious Cottonmouth

uso

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>
    );
}
Noob Learner

Reaja JS Usestate

// Hooks are a new addition in React 16.8. They let you use state and other React features without writing a class.

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>
  );
}
scooby-doo

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