HTML5 APIs have made it possible to create things we never before thought possible. This month's cover feature takes us on a tour of the most important and exciting ones, providing plenty of examples of cool things that can be done with them.
Last week's W3C editor's draft brought us one step closer to a workable specification for responsive images. Anselm Hannemann explores how the draft spec came about, the problems that remain to be solved – and why we need a specification in the first place
The Responsive Grid System isn't a framework or a boilerplate. But it does make creating responsive websites quick and easy. Graham Miller, its creator, explains how to use it
In this exclusive excerpt from Responsive Web Design with HTML5 and CSS3, Ben Frain explores how to convert pixel-based designs to their proportional equivalents
Shwetank Dixit of Opera Software explains how to use localStorage to save data offline so that what a user types into the form isn’t lost if disaster strikes
As screens get smaller and more detailed, web pages will have to change to cope. Sean B Palmer examines the past, and the future, of CSS resolution independence
We present an exclusive excerpt from jQuery Mobile Web Development Essentials, on the basics of theming and building and using a custom theme for your app
Martha Rotter, freelance web developer and co-founder of Idea magazine, explains how you can make your content portable but discovers quite a few accessibility issues with digital magazines
PhoneGap enables you to write apps for an array of mobile platforms using standard web languages. Its top evangelist, Brian LeRoux, chats to Tom May about the framework’s evolution, and how it’s sowing the seeds of its own destruction
Eric Bidelman, senior developer programs engineer on the Google Chrome team, presents some practical uses of what's possible with HTML5 and CSS3 today, including the CSS Flexible Box Layout Module and the HTML5 Filesystem API
This month, Mark Penfold's round-up of the best new tools ranges from cutting-edge experiments to down-to-earth utilities. Give them a try: they're all free
With new CSS features come opportunities to animate without the need for script. Sam Hampton-Smith demonstrates how to produce a retro gaming-inspired sprite