How to add array object elements in react js

Today in this blog, we will aware about How to add array object elements in reactjs. So, without wasting any time lets do it but lets recap what is exactly React js.

React

Certainly, reactjs is a JavaScript library developed by Facenook for building user interfaces. It allows developers to create reusable UI components and effciently manage the state of their applications. Here are some key aspects of Reactjs.



Component-Based Architecture: ReactJS follows a component-based architecture, where the user interface is divided into small, reusable components. Components encapsulate their own logic, state, and rendering, making it easier to build and maintain complex user interfaces.


Virtual DOM: ReactJS uses a virtual representation of the DOM (Document Object Model), known as the Virtual DOM. When the state of a component changes, React updates the Virtual DOM.


JSX: JSX is a syntax extension for JavaScript used in React. It allows developers to write HTML-like code within JavaScript, making it easier to describe the structure and appearance of components. JSX code is transpiled to regular JavaScript using tools like Babel before being executed in the browser.

 

Hooks: React introduced Hooks in version 16.8 as a way to use state and other React features in functional components. Hooks allow developers to write reusable logic and manage state within functional components without the need for class components. The most commonly used hooks are useState for managing state and useEffect for handling side effects such as fetching data or subscribing to events.



React Router: React Router is a popular routing library for React applications. It enables developers to create single-page applications with multiple views and handles routing between different components based on the URL.


State Management: React provides a flexible ecosystem of state management solutions. While React's built-in state management (useState ) is suitable for managing local component state, more complex applications may benefit from additional state management libraries like Redux. These libraries help manage global application state and provide predictable ways to update and access the state.



ReactJS has gained widespread popularity due to its performance, reusability, and declarative approach to building user interfaces. It has large community.



NOTE - Here we will Tailwind CSS for designing.



Here we first make a file as called ElementAdd.jsx. 

import React, { useState } from 'react';

function ElementAdd() {
  const [myArray, setMyArray] = useState([
    { id: 1, name: 'mango' },
    { id: 2, name: 'apple' },
    { id: 3, name: 'banana' }
]);
  const [inputValue, setInputValue] = useState('');

  const handleInputChange = (event) => {
    setInputValue(event.target.value);
  };

  const addElement = () => {
    const newElement = { id: myArray.length + 1, name: inputValue };
    setMyArray(prevArray => [...prevArray, newElement]);
    setInputValue('');
  };

  return (
    <div>
      {myArray.map(item => (
        <div key={item.id}>{item.name}</div>
      ))}

      <input type="text" value={inputValue}  className='border' onChange={handleInputChange} />
      <button onClick={addElement} >Add Element</button>
    </div>
  );
}

export default ElementAdd;

 

# In this example, the initial state myArray is an empty array. The inputValue state variable is used to capture the user input from an input field.

# The handleInputChange function is triggered when the user types in the input field. It updates the inputValue state with the new value entered by the user.

# The addElement function is triggered when the "Add Element" button is clicked. It creates a new element using the current inputValue as the name and assigns a unique id. It then uses the setMyArray function to update the array state by spreading the previous array elements (prevArray) along with the new element.

# After adding the element, the setInputValue('') function is called to reset the input field.

# When rendering the array, each item's name property is displayed. The input field captures user input, and the "Add Element" button triggers the addElement function to add a new object element to the array based on the user's input.

# In this example, item.id is used as the key for each rendered element.

Output

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