infoBox Demo

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jQuery is a fast, small, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers There's a lot more to learn about building web sites and applications with jQuery than can fit in API documentation. If you're looking for explanations of the basics, workarounds for common problems, best practices, and how-tos, you're in the right place! jQuery, at its core, is a Document Object Model (DOM) manipulation library. The DOM is a tree-structure representation of all the elements of a Web page. jQuery simplifies the syntax for finding, selecting, and manipulating these DOM elements. For example, jQuery can be used for finding an element in the document with a certain property (e.g. all elements with an h1 tag), changing one or more of its attributes (e.g. color, visibility), or making it respond to an event (e.g. a mouse click)

The principles of developing with jQuery are:

1. Separation of JavaScript and HTML The jQuery library provides simple syntax for adding event handlers to the DOM using JavaScript, rather than adding HTML event attributes to call JavaScript functions. Thus, it encourages developers to completely separate JavaScript code from HTML markup

2. Brevity and clarity jQuery promotes brevity and clarity with features like chainable functions and shorthand function names

3. Elimination of cross-browser incompatibilities The JavaScript engines of different browsers differ slightly so JavaScript code that works for one browser may not work for another. Like other JavaScript toolkits, jQuery handles all these cross-browser inconsistencies and provides a consistent interface that works across different browsers

4. Extensibility New events, elements, and methods can be easily added and then reused as a plugin