Summary: <a href="http://www.avclub.com/">The A.V. Club</a>, <a href="http://www.theonion.com/">The Onion</a>, and <a href="http://www.clickhole.com/">ClickHole</a> are truly digital publishing brands. Kelly Pratt and Kristi-Lynn Jacovino explain how they made them responsive, running off a single codebase.
