yiekheng
3745f1f316
When the user resumes at a mid-chapter page, the reader previously skipped the earlier pages entirely. This adds a scroll-up prefetch so those earlier pages appear smoothly as the user scrolls toward the top. - prependBatch() mirrors fetchBatch but decrements the offset cursor and prepends the new pages. prependExhaustedRef fires when the cursor hits 0 (start of chapter). - Trigger: scrollY < 2500px fires prepend — well before the user reaches the top, so the DOM + images spawn ahead of the scroll position. - Scroll preservation: aspect-[3/4] on <img> reserves vertical space before the image bytes arrive, so scrollHeight is accurate immediately after React commits. A single scrollBy(delta) keeps the previously-visible page visually anchored — no per-image jitter. - Forward-fetch trigger indices + loadedCountRef are shifted by batch.length on each prepend so next-batch prefetch still fires at the correct page. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This is a Next.js project bootstrapped with create-next-app.
Getting Started
First, run the development server:
npm run dev
# or
yarn dev
# or
pnpm dev
# or
bun dev
Open http://localhost:3000 with your browser to see the result.
You can start editing the page by modifying app/page.tsx. The page auto-updates as you edit the file.
This project uses next/font to automatically optimize and load Geist, a new font family for Vercel.
Learn More
To learn more about Next.js, take a look at the following resources:
- Next.js Documentation - learn about Next.js features and API.
- Learn Next.js - an interactive Next.js tutorial.
You can check out the Next.js GitHub repository - your feedback and contributions are welcome!
Deploy on Vercel
The easiest way to deploy your Next.js app is to use the Vercel Platform from the creators of Next.js.
Check out our Next.js deployment documentation for more details.