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August 27, 2013 As Mat Marquis recently summarized on SmashingMag, the srcset attribute allows developers to specify a list of sources for an image that are delivered depending on the pixel density of a user's screen. An example of how srcset may be used is as follows, where we define three different image sources for the resolutions we wish to target: <img alt="My photo" src="photo.jpg" srcset="p