Friday, July 23, 2021
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Reactjs

Reactjs Update Array Value Using useState Hook

Reactjs Update Array Value Using useState Hook
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Hello friends, welcome back to my blog. Today in this blog post, I am going to show you, Reactjs Update Array Value Using useState Hook.

Post working: Guy’s in this post, I am using react hook useState . By using hook useState, I am updating array values. Guy’s I must say this is very interesting. I will come with more example like this using react hooks.


Working Demo
Reactjs Update Array Value Using useState Hook
Reactjs Update Array Value Using useState Hook

For reactjs new comers, please check the below link:

Reactjs Basic Tutorials


Friends now I proceed onwards and here is the working code snippet and please use this carefully to avoid the mistakes:

1. Firstly, we need fresh reactjs setup and for that, we need to run below commands into out terminal and also we should have latest node version installed on our system:

npx create-react-app reacthooks

cd reacthooks

npm start

2. (Optional, I have used for better looks of table)Now we need to run below commands into our project terminal to get bootstrap and related modules into our reactjs application:

npm install bootstrap --save

npm start //For start project again

3. Finally for the main output, we need to add below code into our reacthooks/src/App.js file or if you have fresh setup then you can replace reacthooks/src/App.js file code with below code:

import {React, useState} from 'react';

import 'bootstrap/dist/css/bootstrap.min.css'
export default function App() {

  //Demo data
  const initial_data = [{
    name: 'Audi',
    type: 'sedan'
  }, {
    name: 'BMW',
    type: 'sedan'
  }];
  const [cars, setCars] = useState(initial_data)

  //New data value
  let newCar = {
    name: 'Benz',
    type: 'sedan'
  }

  //array merging
  const updatedCarsArray = [...cars, newCar];
  console.log(updatedCarsArray);
  function newData()
  {
    //new array on button click
    setCars(updatedCarsArray);
  }
  
  return (
    <div class="container text-center mt-5 mb-5">
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       <table class="table table-hover table-bordered p-5">
        <thead>
          <tr>
           
            <th scope="col">Name</th>
            <th scope="col">Type</th>
           
          </tr>
        </thead>
        <tbody>
        { // calling state variable data to filter data inside table
        cars.map(function({name, type}){
         
              return (
                <tr>
               
              
                <td>{name}</td>
                <td>{type}</td>
               
              </tr>
                );
            })}
            
            </tbody>
            </table>
            <button className="btn btn-primary" onClick={newData}>Add New Value</button>
    
  </div>
  );
  
}

Now we are done friends. If you have any kind of query or suggestion or any requirement then feel free to comment below.

Note: Friends, I just tell the basic setup and things, you can change the code according to your requirements.

I will appreciate that if you will tell your views for this post. Nothing matters if your views will be good or bad.

Jassa

Thanks

Ajay Malhotra
the authorAjay Malhotra
Hello to all. Welcome to therichpost.com. Myself Ajay Malhotra and I am freelance full stack developer. I love coding. I know WordPress, Core php, Angularjs, Angular 2, Angular 6, Angular 7, Angular 8, Angular 9, Angular 10, Angular 11, Angular12, Bootstrap 5, Nodejs, Laravel, Codeigniter, Shopify, Squarespace, jQuery, Google Map Api, Vuejs, Reactjs, Big commerce etc.

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