Scroll Restoration After Micro-Frontend Redirects: Double RAF + MutationObserver

When building a micro-frontend app, I ran into a deceptively simple requirement: after a user triggers an external redirect (OAuth, payment flow, etc.) and returns to the page, scroll back to the element they were interacting with. My first instinct was "just save the position and scroll back." That turned out to be wrong. The real insight: this is a timing problem, not a scroll problem . Three things must happen in sequence, each at the correct moment in the browser's rendering pipeline. Once I