JavaScript in Web Development

Client-Side Scripting

What is JavaScript?

• A high-level, dynamic, and interpreted programming language
• Primarily used for client-side scripting on the web
• Adds interactivity to websites by manipulating web pages and responding to user interactions

JavaScript in Web Development

• Used for:
  • Creating interactive web pages
  • Validating form data
  • Creating web applications
  • Adding special effects to web pages
• Can be used for:
  • Server-side programming with technologies like Node.js
  • Mobile and desktop app development
  • Game development

JavaScript Features

• Dynamic: JavaScript code is executed at runtime
• Loose Typing: Variable data types are determined at runtime
• First-Class Functions: Functions are treated as first-class citizens, allowing them to be passed as arguments, returned as values, and stored in data structures
• Prototype-Based: Objects can inherit properties and behavior from other objects

JavaScript in Web Browsers

• JavaScript Engine: Web browsers have a built-in JavaScript engine that interprets and executes JavaScript code
• DOM (Document Object Model): JavaScript can interact with the DOM, allowing it to dynamically change web page content and structure
• Events: JavaScript can respond to user interactions and other events, such as mouse clicks and keyboard input

JavaScript Overview

• JavaScript is a high-level, dynamic, and interpreted programming language.
• It's primarily used for client-side scripting on the web, adding interactivity to websites.

JavaScript in Web Development

• JavaScript is used for creating interactive web pages, validating form data, and creating web applications.
• It's also used for adding special effects to web pages.
• JavaScript can be used for server-side programming with technologies like Node.js.
• It's also used for mobile and desktop app development, and game development.

JavaScript Features

Dynamic Nature

• JavaScript code is executed at runtime.

Typing

• JavaScript has loose typing, where variable data types are determined at runtime.

Functions

• JavaScript treats functions as first-class citizens.
• Functions can be passed as arguments, returned as values, and stored in data structures.

Object-Oriented

• JavaScript is prototype-based, where objects can inherit properties and behavior from other objects.

JavaScript in Web Browsers

JavaScript Engine

• Web browsers have a built-in JavaScript engine that interprets and executes JavaScript code.

DOM Interaction

• JavaScript can interact with the DOM, allowing it to dynamically change web page content and structure.

Event Handling

• JavaScript can respond to user interactions and other events, such as mouse clicks and keyboard input.

JavaScript Overview

• A high-level, dynamic, and interpreted programming language
• Primarily used for client-side scripting on the web
• Executed on the client-side (browser) rather than the server-side

Roles in Web Development

• Enhances user interface and user experience (UI/UX)
• Creates dynamic web pages
• Responds to user interactions (events)
• Validates user input
• Creates web applications and games

JavaScript and Web Technologies

JavaScript and HTML

• Embedded in HTML documents using the `