By Scott Jehl

We started the Picturefill project over 2 years ago to provide an easy, responsible, and immediately-usable approach to delivering appropriate images to every browser and device – a goal commonly called responsive images. Since then, the approach has been used widely, on sites like Microsoft.com, Dribbble.com, and more.

View here: https://www.filamentgroup.com/lab/picturefill_2_a