These functions automatically handle cross-browser issues.Ījax: jQuery also includes easy to use AJAX functions to load data from servers without reloading whole page.Ĭross-browser support: jQuery library automatically handles cross-browser issues, so the user does not have to worry about it. Special Effects: You can apply special effects to DOM elements like show or hide elements, fade-in or fade-out of visibility, sliding effect, animation etc.Įvents: jQuery library includes functions which are equivalent to DOM events like click, dblclick, mouseenter, mouseleave, blur, keyup, keydown etc. For example, adding or removing elements, modifying html content, css class etc. It provides many built-in functions using which you can accomplish various tasks easily and quickly.ĭOM Selection: jQuery provides Selectors to retrieve DOM element based on different criteria like tag name, id, css class name, attribute name, value, nth child in hierarchy etc.ĭOM Manipulation: You can manipulate DOM elements using various built-in jQuery functions. JQuery makes a web developer's life easy.

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. If the request is already complete, the callback is fired immediately.JQuery is a fast, small, and feature-rich JavaScript library. always() callbacks on a single request, and even to assign these callbacks after the request may have completed. The Promise interface also allows jQuery's Ajax methods, including $.get(), to chain multiple. For information about the arguments this function receives, see the jqXHR Object section of the $.ajax() documentation. The jqXHR.done() (for success), jqXHR.fail() (for error), and jqXHR.always() (for completion, whether success or error added in jQuery 1.6) methods take a function argument that is called when the request terminates. This jQuery XHR object, or 'jqXHR,' returned by $.post() implements the Promise interface, giving it all the properties, methods, and behavior of a Promise (see Deferred object for more information).

The jqXHR ObjectĪs of jQuery 1.5, all of jQuery's Ajax methods return a superset of the XMLHTTPRequest object. Pages fetched with POST are never cached, so the cache and ifModified options in jQuery.ajaxSetup() have no effect on these requests. This example fetches the requested HTML snippet and inserts it on the page.

Jquery