Responsive Images in Practice

    srcset="quilt_3/large.jpg  1240w, 
            quilt_3/medium.jpg  620w,
            quilt_3/small.jpg   310w"
    sizes="(min-width: 41.25em) 38.75em,
           calc(100vw - 2.5em)"
    alt="A crazy quilt whose irregular fabric scraps are fit into a lattice of diamonds." />

Let’s take an existing web page and make its images responsive. We’ll do so in three passes, applying each piece of the new markup in turn:

  1. We’ll ensure that our images scale efficiently with srcset and sizes.
  2. We’ll art direct our images with picture and source media.
  3. We’ll supply an alternate image format using picture and source type.

In the process we’ll see firsthand the dramatic performance gains that the new features enable.

A List Apart: Responsive Images in Practice →

Published by Bramus!

Bramus is a frontend web developer from Belgium, working as a Chrome Developer Relations Engineer at Google. From the moment he discovered view-source at the age of 14 (way back in 1997), he fell in love with the web and has been tinkering with it ever since (more …)

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