jQuery is a cross-platform JavaScript library designed to simplify the client-side scripting of HTML. jQuery’s syntax is designed to make it easier to navigate a document, select DOM elements, create animations, handle events, and develop Ajax applications. jQuery also provides capabilities for developers to create plug-ins on top of the JavaScript library.

Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language. CSS is designed primarily to enable the separation of document content from document presentation, including aspects such as the layout, the colors, the fonts and other many more aspects.

HTML is a markup language used for structuring and presenting content on the World Wide Web.It is the fifth and current version of the HTML standard.The APIs and Document Object Model (DOM) are now fundamental parts of the HTML5 specification and HTML5 also better defines the processing for any invalid documents.