Reader Architecture
The frontend uses capabilities in readers/core.js and a shared shell for loading, errors, retry, dock, progress, and cleanup. Engines are loaded on demand.
| Format | Current transport | Rendering |
|---|---|---|
| original content with Range | PDF.js + Vite worker | |
| EPUB | binary content | JSZip parser and normalized HTML content |
| MOBI | content/pages/resources | frontend parser and backend support |
| CBZ | index and pages | on-demand images |
| CBR | index and pages | UnRAR/7z extraction and on-demand images |
The reader keeps only the current and nearby pages where possible, revokes Object URLs, and runs cleanup on close. Progress is format-agnostic: position/page, total, percentage, completion, and timestamp.
Details: readers.