React: is a JavaScript library for building user interface. It’s not exactly a framework. DOM: is “Document Object Model”. It’s the browsers’ programming interface for HTML and XML documents that treat them as tree structures. When we tell React to render a tree of elements in the browser, it first…

Primitive Values: All types except objects can not be modified after creation are primitive values. console.log(4); console.log(“this is”); console.log(undefined); Primitive types: string, number, bigint, boolean, undefined, symbol, null. Functions and Objects are not primitive. They can be modified after creation. console.log({ }); console.log(x => x * 4); Expressions: Expressions are…

Building blocks of JavaScripts: Number String Boolean Object Function Array Date RegExp Symbol (new in ES2015) null undefined Number: JavaScript Number is a primitive wrapper object used to represent and manipulate numbers like 52 or -8.04. …