XSS
WebDefinition
Cross-Site Scripting (XSS) is a web security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. XSS can steal session cookies, redirect users, deface sites, or execute actions on behalf of victims.
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HTML
HyperText Markup Language (HTML) is the standard markup language for creating web pages. It defines the structure and semantic meaning of web content using elements represented by tags. Browsers parse HTML to render the visual structure of a page.
CSS
Cascading Style Sheets (CSS) is a stylesheet language used to describe the visual presentation of HTML documents. CSS controls layout, colors, typography, animations, and responsive design through a cascade of rules applied to HTML elements.
JavaScript
JavaScript is a high-level, interpreted programming language that enables dynamic, interactive content on web pages. It runs in the browser via the JavaScript engine (V8, SpiderMonkey) and on the server via Node.js. It is the only scripting language natively supported by all browsers.
TypeScript
TypeScript is a strongly typed programming language built on top of JavaScript. Developed by Microsoft, it adds optional static typing, interfaces, generics, and decorators to JavaScript. TypeScript compiles to plain JavaScript and runs anywhere JavaScript runs.