Class PPT

Agenda

• Array
• DOM

Array

• An array in JavaScript is a special variable that can hold multiple values.
• Arrays allow you to store, access, and manipulate lists of data efficiently.
• array declaration can be done in two ways:
  1. Using Square Brackets (Recommended)
  2. Using the Array Constructor

let fruits = ["Apple", "Banana", "Mango"];
let fruits = new Array("Apple", "Banana", "Mango");

• Square brackets [] are preferred because they are more concise.
• Array elements are accessed using index numbers, starting from 0.

Window Object

• It represents an open window in the browser. It is browser's object(not JS object) which is created automatically.
• It is a global object with lot of properties and methods.

DOM (Document Object Model)

• When a webpage is loaded the browser creates DOM of the page.
• It is the data representation of the objects that comprise the structure and content of a document on the web.
• DOM represents an HTML document in memory.
• The DOM represents the document as nodes and objects so that programming languages can interact with the page.
• In both cases, it is the same document but the Document Object Model (DOM) representation allows it to be manipulated.