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jQuery

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. With a combination of versatility and extensibility, jQuery has changed the way that millions of people write JavaScript.

Traditionally, a copy of jQuery has been included with every web application that requires it. Starting with Fedora 21, many of those applications have migrated to a shared system copy of jQuery.

If you're developing an application that uses jQuery on Fedora and don't want to download your own copy or rely on a third-party CDN, you can now install one of our jquery packages and use it instead. You can find the 1.x branch of jQuery that supports Internet Explorer 6 in the js-jquery1 package, and the 2.x branch of jQuery that only works with modern web browsers in the js-jquery package. For more information on using these packages in your applications, see https://fedoraproject.org/wiki/Web_Assets.

PHP 5.6

The PHP stack has been updated to version 5.6, the latest upstream version.

The important changes in this new version include:

Security:

   TLS Peer Verification
   Improved TLS Defaults 

Language improvements:

   Constant Scalar Expressions
   Argument Unpacking
   Syntax for variadic functions
   Power Operator
   Importing namespaced functions 

New tool:

   PHP debugger provided in the new php-dbg subpackage (phpdbg command)

Ruby on Rails 4.1

Fedora 21 includes Ruby on Rails 4.1, the latest version of the well-known web application framework written in Ruby. Highlights in this release include Spring application preloader, config/secrets.yml, Action Pack variants and Action Mailer previews. The Release Notes are at http://edgeguides.rubyonrails.org/4_1_release_notes.html.

Information for developers upgrading existing applications to Ruby on Rails 4.1 can be found in the Upgrading Ruby on Rails guide at http://edgeguides.rubyonrails.org/upgrading_ruby_on_rails.html.