In this talk, Tony shows how an authoring and semantic HTML-first approach to JSX template work leads to more readable, maintainable, and accessible UI components. He demonstrates how to think through implementing a UI prototype in a semantic way, authoring HTML before visuals. He shows how accessible markup improves performance, reduces DOM size, minimizes time spent on CSS, and reduces cognitive load not only for developers, but also for all our users, no matter how they consume our sites and applications.