With a mobile-first responsive design approach, if any part of the process breaks down, your user can still receive a representative image and avoid an unnecessarily large request on a device that may have limited bandwidth. But with several newer browsers implementing an “image prefetching” feature that allows images (for web development) to be fetched before parsing the document’s body, some of the web’s brightest developers are abandoning responsive images in favor of user agent detection, at least as a temporary solution. For us standardistas, UA detection leaves a bad taste in the mouth. More importantly, as the number and kinds of devices continue to grow, UA detection will quickly become untenable—just as browser detection did back in the bad old days before web standards. What’s really needed, argues Mat Marquis, is a new markup element that works the way the HTML5 video element works. Sound crazy? So crazy it just might work.

Bronxville is an affluent village within the town of Eastchester, New York, in the United States. It is a suburb of New York City, located approximately 15 miles (24 km) north of midtown Manhattan in southern Westchester County. At the 2010 census, Bronxville had a population of 6,323. It currently (Bronxville New York's responsive images how they almost worked and what we need) ranks 20th in the US on a list of the highest income places in the United States.