jQuery Mobile Project Alpha

First Release of jQuery Mobile Project and jQuery 1.4.3

Jessica Thornsby

A busy week at camp jQuery sees them release the first alpha of their brand new jQuery Mobile project, alongside the latest release of their jQuery library.

It’s been a busy week for the jQuery team, with them announcing
version 1.4.3 of jQuery alongside the first release of the jQuery
Mobile project.

Firstly, jQuery version 1.4.3 is the third minor release on top of
jQuery 1.4, and integrates the JSLint tool into the jQuery
workflow. Please note that minor changes have been made to JSLint
to suit the jQuery development style. These changes include
ignoring warnings from JSLint, such as ‘undefined,’ as jQuery use
this internally, and “Expected a ‘break’ statement before ‘case'”
as passthroughs are used inside of Sizzle to optimise the
:only-child selector checks. jQuery 1.4.3 also enables the ‘Evil’
and ‘Forin’ JSLint options by default. More details on the JSLint
changes, is available at the jQuery Core Style Guidelines.

Some interdependencies that existed in the jQuery source have
been removed for this release. Users now have the option of using a
script loader to dynamically load individual jQuery modules, and
are no longer required to build a copy of jQuery in order to run
the jQuery test suite. The CSS module has been almost completely
rewritten, with a focus on extensibility, giving users the freedom
to write custom CSS plugins that extend the functionality provided
by .css() and .animate(). The rewrite has also separated jQuery
functionality into two paths: getting and setting an element’s
.style property, and getting the current computed style information
of an element.

Moving onto the data module,the jQuery Metadata plugin has been
moved into core, and data set on a Javascript object is now set
directly to the object, rather than going into the internal data
object store. The setData and getData events have been joined by
changeData, which is fired after any individual data properties are
changed when using .data().

The jQuery team also announced the first alpha from the jQuery Mobile project.
jQuery Mobile is a user interface framework built on top of jQuery,
for building applications targeting mobile devices. The core jQuery
library is also being improved to work across major mobile
, as part of the project. It will support versions of
the iOS, Symbian, Blackberry, Android, webOS, bada, and MeeGo
platforms. “Thus far no other framework has attempted to target as
many mobile browsers as we have,” reads the project’s
strategy outline
. The project is supported by the webOS
platform and Mobile Firefox.

The jQuery Mobile project consists of jQuery Core (not a “mobile
only” build of jQuery, but a single script file that will provide
jQuery plus support for mobile browsers) and jQuery UI.

The demos and documentation for all the components in jQuery
Mobile 1.0a1 are available in a unified demo application. The alpha
comes with support for many of the so-called ‘A-Grade’ browsers the
project sets out to support, including Android, Blackberry, webOS
and Opera Mobile. Please note that there are still bugs on these
platforms. All components are ARIA accessible and keyboard
navigable. jQuery Mobile has a themeing structure for building
capable web applications. For the alpha release, all the theme
configuration must be done manually, but a Themeroller tool is
planned for themeing applications in the final 1.0 release.

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