jQuery is a fast and concise JavaScript library created by John Resig in 2006. jQuery simplifies HTML document traversing, event handling, animating, and Ajax interactions for Rapid Web Development. jQuery greatly simplifies JavaScript programming and more importantly jQuery is easy to learn.

jQuery is a JavaScript toolkit designed to simplify various tasks by writing less code. Here is the list of important core features supported by jQuery −

DOM manipulation − The jQuery makes it easy to select DOM elements, traverse them and lets modify their content by using cross-browser open source selector engine called Sizzle.

Event handling − The jQuery offers an easy and elegant way to capture a wide variety of events, such as a user clicking on a link, without the need to clutter the HTML code itself with event handlers.

AJAX Support − The jQuery helps you a lot to develop a responsive and feature-rich site using AJAX technology.

Animations − The jQuery comes with plenty of built-in animation effects which you can use in your websites.

Lightweight − The jQuery is very lightweight library – about 19KB in size ( Minified and gzipped ).

Cross Browser Support − The jQuery has cross-browser support, and works well in most of the browsers includes IE 6.0+, FF 2.0+, Safari 3.0+, Chrome and Opera 9.0+

Latest Technology − The jQuery supports CSS3 selectors and basic XPath syntax.