How to build an engaging virtual product tour

This post details the technical implementation of Vercel's virtual product tour, focusing on the design and development of an interactive slideshow experience. Key technical aspects covered include: the use of `DemoContext` as a single source of truth for tour data, navigation synchronization with URL query parameters using Next.js's `useRouter`, the structure of `TooltipContent` for dynamic tooltip information, a `repositionTooltip` function that handles dynamic positioning and viewport overflow with `ResizeObserver` and throttling, and animation techniques using CSS transitions and `transitionEnd` event listeners to ensure smooth and timed animations. Accessibility considerations such as ARIA attributes and keyboard navigation are also discussed.