/Javascript/React/This setstate previous state react

This setstate previous state react

When to use previous state in useState

import React, { useState } from "react";
import ReactDOM from "react-dom";

function Counter() {
  const [count, setCount] = useState(0);

  return (
    <div>
      <h1>{count}</h1>
      <button onClick={() => setTimeout(() => setCount(count + 1), 2000)}>
        Delayed Counter (basic)
      </button>
      <button onClick={() => setTimeout(() => setCount(x => x + 1), 2000)}>
        Delayed Counter (functional)
      </button>
      <button onClick={() => setCount(count + 1)}>Immediate Counter</button>
    </div>
  );
}

const rootElement = document.getElementById("root");
ReactDOM.render(<Counter />, rootElement);

Source: stackoverflow.com

This setstate previous state react

state = {count: 0}

increment = () => { 
this.setState(previousState => ({
count: previousState.count + 1
}))
}

Similar codes

6 votes148 views2 answers
UseHistory react-router-dom
Javascript React
-1 vote152 views1 answer
React grid
Javascript React
3 votes170 views1 answer
Pass element from child to parent react
Javascript React
0 vote141 views1 answer
React enzyme mount ReferenceError: is not defined
Javascript React
1 vote154 views2 answers
React datepicker documentation
Javascript React
0 vote135 views1 answer
How to add a key in a react element
Javascript React
0 vote158 views1 answer
Image and video lightbox react
Javascript React
0 vote139 views2 answers
Hide screen links in drawerNavigation in react native
Javascript React
3 votes246 views3 answers
Center horizontally react native
Javascript React
69 votes140 views6 answers
React icon
Javascript React