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What is a SPA (single-page-application) ?

Read Here. Just the first 3 points are enough.

What is ReactJS ?

React.js is an open-source JavaScript library that is used for building user interfaces specifically for single-page applications. It’s used for handling the view layer for web apps. React also allows us to create reusable UI components. React allows developers to create large web applications that can change data, without reloading the page. The main purpose of React is to be fast, scalable, and simple. It works only on user interfaces in the application.

Why do we use it?

anushka-beri

Array Methods

const collection = [1, 2, 3, 4, 5, 6, 7, 8];

const flowers = [
  {
    name: "Rose",
    price: 30,
  },

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Call, Apply Methods

var pokemon = {
  firstName: "Pika",
  lastName: "Chu ",
  getPokeName: function () {
    var fullName = this.firstName + " " + this.lastName;
    return fullName;
  },

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Functional Programming in JavaScript

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