JQuery - Introduction

jQuery is a small, light-weight and fast JavaScript library. It is cross-platform and supports different types of browsers. It is very useful for data manipulation.

• jQuery is a small, fast and lightweight JavaScript library.

• jQuery is platform-independent.

• jQuery means "write less do more".

• jQuery simplifies AJAX call and DOM manipulation.

jQuery features:

• HTML manipulation

• DOM manipulation

• DOM element selection

• CSS manipulation

• Effects and Animations

• Utilities

• AJAX

• HTML event methods

• JSON Parsing

• Extensibility through plug-in

To starts with,

• A $ sign to define/access jQuery

• A (selector) to "query (or find)" HTML elements

• A jQuery action() to be performed on the element(s)

jQuery Syntax:

The jQuery syntax is tailor-made for selecting HTML elements and performing some action on the element(s).

Basic syntax is: $(selector).action()

Examples:

$(this).hide() - hides the current element.

$("p").hide() - hides all elements.

$(".test").hide() - hides all elements with class="test".

$("#test").hide() - hides the element with id="test".