Improving Performance Perception: On-demand Image Resizing
PHP
By Bruno Skvorc,
Image Resizing: Bruno Škvorc shows how to modify a multi-image gallery blog to serve resized versions of images depending on the size of the viewport.
srcset
How to Build Responsive Images with srcset
HTML & CSS
By Saurabh Kirtani,
Microsoft's Saurabh Kirtani explains how to build responsive images on the web with srcset
What’s New in Firefox 38
Web
By Elio Qoshi,
Elio Qoshi looks at Firefox 38, supporting responsive images via picture and srcset, web workers with WebSockets, and DRM via Encrypted Media Extensions.