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Feature: Scroll Reveal Animations

Purpose​

  • Feature name: Scroll reveal animations
  • Why this feature exists: Improve readability and focus by pacing content as the reviewer scrolls.

Scope​

In scope​

  • fade-in-on-scroll behavior
  • reduced-motion compliance

Out of scope​

  • global theme transitions
  • page-level navigation structure

Prereqs / Inputs​

  • client-side JavaScript enabled
  • reduced-motion preference available

Procedure / Content​

Feature summary​

  • Feature name: Scroll reveal animations
  • Feature group: Navigation and UX polish
  • Technical summary: Intersection Observer toggles visibility classes to animate content blocks.
  • Low-tech summary: Sections gently fade in as you scroll.

Feature in action​

  • Where to see it working: Content sections on / and /projects.

Confirmation Process​

Manual​

  • Steps: Scroll down a page with multiple sections.
  • What to look for: Sections fade in as they enter the viewport and respect reduced-motion preferences.
  • Artifacts or reports to inspect: None.

Tests​

Potential behavior if broken or misconfigured​

  • Animations never trigger due to observer not attaching.
  • Reduced-motion users still see transitions.

Long-term maintenance notes​

  • Re-check animations after layout or CSS changes.

Dependencies, libraries, tools​

  • Next.js App Router
  • React
  • Tailwind CSS

Source code references (GitHub URLs)​

ADRs​

Runbooks​

  • None.

Additional internal references​

Validation / Expected outcomes​

  • Sections fade in on scroll without blocking content access.

Failure modes / Troubleshooting​

  • No animation: confirm observer attaches and CSS classes exist.
  • Animation jank: verify reduced-motion handling and layout stability.

References​

  • None.