React aka React.js is a "JavaScript library" for building interfaces for a website , Generally used to build single-page applications. It also help us to create reusable UI components that can be used multiple time in the project (Ex. Same button or same log-in page or even whole page) which help us to follow the "DRY" (Don't Repeat Yourself) principle in Programming world.
I Aint reading this allat
• A library is a collection of pre-written code (functions, classes etc.) that developers can use to perform specific functionality without writting the basic fundamentals(structure) again and again , That's what we call re-usable components
• A Framework is like a structural foundation that provides a base for the application development. It give you Well-structured pattern of writting code that is much easier to understand and work with. You can think "framework" and "library" as Framework is a Skeleton and library is a bone , skeleton have it's own defined shape and end-result and you can’t easily modify the core structure of a framework (just as you can’t reshape a skeleton), but as of Library(bones) u can use it for creating specific functionality (structure like hand,legs )
• A Package is a distribution format for code and other assets(code,images,styesheet) , It is like bundle of written codes , libraries etc. (usually use "pip" & "npm" to download packages)
• A bundler focuses on optimizing and bundling assets (such as JavaScript and CSS files) for web development, it package a series of code modules into one or more files (like store all things in it's own format/style inside a single file) , the main difference between a Bundler & Package is package share the same thing the publisher published , whereas bundler share assest in minimum file possible and optimising code using methods like concatenating, minifying (removing useless characters), or transforming them for better performance and efficiency
Example :
Original.js
let nullVar = typeof null;
let symbol = typeof Symbol("id")
// Symbol is often used to store unqiue values
let id1 = Symbol("id")
let id2 = Symbol("id") Imagine a publisher want to publish this code as an package so when u download it directly download the package it will give you the exact same file / code format but when the publisher used a bundler , the bundler will publish this in it's custom format
Example :
bundler.js
let a=typeof null,b=typeof Symbol("id");let c=Symbol("id"),d=Symbol("id"); So bundler would convert your js code in something like this to optimize the file and while its still plain js and that can run but not so redeable right?
Above is just an example that how bundler can store your assests to optimise the code so the sharing will be fast, so whenever you upload your multiple assest through or use an bundler , it usally bundles your code in a single file(or in minimum files), In there custom optimised way and at the time of download , it and convert it again in its orginal format , so this process reduces time significantly because bundling all files in a single file allow bundler to send xhr request only one time (to download packages u have to download multiple files from server so u have to send multiple xhr request to server hince it consume too much time) . So using bundler for downloading packages are always recommended
Remember it's just an example irl things works differently but u got the idea
• An Extension refers to additional functionality or features added to an existing system or framework without modifying its core functionality. Imagine it just like Chrome extensions that give you addition features similarly in Programming it also works like a custom methods or extended class (In Javascript u usually extend a class for adding more properties without modifying the core class)
While there are no different “types” of React, React is the only and the core library that is used for web devlopement but React have but a separate framework that uses React principles for mobile app development aka React Native
React Native allow us to use core functionality of React like creating reusable components , React Methods for mobile app development.
Although React itself is often extended through the use of third-party libraries or custom components to add more functionality in both app and web development
React is made by facebook to build easy & re-usable components and now also used by many large companies to make UI's in websites . Again it is not a framework just a library so it doesn't have all features of a framework that needs to build a full stack website. To build an entire app with React, there are full-stack React framework like Next.js or Remix. But first learn React :)