Project Overview

Birthday‑Cake Loading (BCL) is a capability‑adaptive progressive enhancement toolkit for React and Next.js. It ships a tiny baseline runtime, detects device/network/user‑preference signals, and upgrades experiences only when there is enough budget. The core idea is baseline-first: content should be correct and usable without animation, smooth scrolling, or audio.

Primary goals:

• Fast time‑to‑content by keeping the base tier lean.
• Conservative detection with safety‑first downgrades.
• Accessibility defaults (prefers-reduced-motion, prefers-reduced-data, save-data).
• First‑class Next.js App Router support.