What is jQuery?


What is jQuery?

jQuery is a fast, cross-platform and feature-rich JavaScript library. It is designed to simplify the client-side scripting of HTML.

jQuery is designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.


jQuery Features

DOM manipulation − Through jQuery, we can easily fetch, negotiate and modify any DOM element and its content by using its cross-browser open source selector engine called Sizzle.

Event handling − The jQuery offers an elegant way to capture a wide variety of events, such as a user click, mouse hover, without the need to clutter the HTML code itself with event handlers.

AJAX Support − The jQuery helps  in developing a responsive Async 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 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.


How to use jQuery?
There are 2 ways to use jQuery.

Local Installation − We can download jQuery library on our local machine and call it directly inside HTML HEAD Tag.

CDN Based Version − We can include jQuery library directly from Content Delivery Network (CDN) inside HTML HEAD Tag.


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