Breaking News: Grepper is joining You.com. Read the official announcement!

useState Hook React Example

WinMaw answered on August 31, 2022 Popularity 8/10 Helpfulness 2/10

answer useState Hook React Example

related How to use React useState Hook

useState Hook React Example

Comment

//this example is for adding user to list

import React, { useState } from 'react';

const [users,setUsers] = useState([
{id:1,name:"John Doe"},{id:2,name:"Merry"},
]);

const [name,setName] = useState('');
const [password,setPassword] = useState('');



function onSubmitHandler(e){
	e.preventDefault();
	console.log(name,password);
	const newUser = {id:Date.now(), name, password}

	setUsers([...users,newUser]);
    
}

return(
<div classsName="container">
	<form onSubmit={onSubmitHandler}>
     <input value={name} onChange={ (e) => setName(e.target.value) } />
     <input value={password} onChange={ (e) => setPassword(e.target.value) } />

     <button type="submit">Create</button>
     </form>
     
    <ul>
    	{users.map(user,index) => {
        	return (
            	<li key={user.id}>{user.name}</li>
            )
        }}
    </ul>

</div>

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: hook javascript use-state

Link to this answer
Share Copy Link

Contributed on May 07 2023

WinMaw

0 Answers Avg Quality 2/10

Closely Related Answers

How to use React useState Hook

Comment

useState - Has the main purpose to change an element status
useState basically helps React to know what to elements need to be rerendered. 

Ex: We have a post                 (state: it is displayed) 
    You want to eliminate the post (setState: it is not displayed)

Code Ex.:
const [blogs, setBlogs] = useState([  
    { title: 'React forever', body:'Lorem ipsum...', author: 'Sara', id: 1 },
    { title: 'Vue kinda sucks', body:'Lorem ipsum...', author: 'Tony', id: 2 },
    { title: 'Angular lets not go there', body:'Lorem ipsum...', author: 'John', id: 3 },
  	]);

// The JS function that filters all the post with diff. id from the id of the post clicked
const handleDelete = (id) => {
  const newBlogs = blogs.filter(blog => blog.id !== id);
    setBlogs(newBlogs);
  }

// React renders the following JSX
return (
    <div className="blog-list">
      <h2>{ title }</h2>
        {blogs.map((blog) => (
          <div className="blog-preview" key={blog.id}>
            <h3>{ blog.title }</h3>
            <p>written by { blog.author }</p>
            <p>{ blog.body }</p> 
            <button onClick={() => handleDelete(blog.id)} className="hideBtn">Hide Post</button>
          </div>
        ))}
    </div>
    );

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: hook

Link to this answer
Share Copy Link

Contributed on Aug 31 2022

Gabriele Orlandi

0 Answers Avg Quality 2/10

useState Hook React Example

Contents

More Related Answers

useState Hook React Example

Closely Related Answers

How to use React useState Hook

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.