progressive-enhancement
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Eric Bailey
Eric Bailey is a Boston-based accessibility advocate, designer, writer, developer, and speaker. As a staff designer on GitHub's Primer design system, he works to make component libraries genuinely usable for people relying on assistive technologies. He is the longtime lead redesigner and maintainer of The A11Y Project, has published more than 200 articles across publications like CSS-Tricks, Smashing Magazine, and the GitHub Blog, and is a fixture on the conference circuit. His guiding line: if it's inaccessible, it is neither radical nor revolutionary.
Scott Jehl
Scott Jehl is a Senior Software Engineer on the Web Performance team at Squarespace, a 20-year veteran of the front-end web who helped define modern responsive and performant design. He authored 'Responsible Responsive Design' (A Book Apart, 2014) and co-authored 'Designing with Progressive Enhancement' (2010), created foundational open-source tools like Respond.js, loadCSS, and Picturefill, and recently led the effort that brought lazy loading to HTML video and audio elements - an official web standard as of March 2026. He speaks globally, teaches online, and believes the web should work fast for everyone, everywhere.