The X in MDX

Rodrigo Pombo demonstrates how MDX can be used beyond its typical interactive-component use case, treating it as a syntax extension for Markdown. Using the MDXProvider wrapper component and React children inspection via mdxType, he builds step-based walkthroughs, scrollytelling layouts, and media-synchronized content. He introduces Code Hike, a project focused on code walkthroughs, and shows how the same MDX-driven technique was used to build the talk itself, with steps synced to video timestamps.