feat(documents): EPUB Reader — read e-books in the browser - #144
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Promote to production: Spreadsheet Viewer
Open .epub e-books entirely client-side (epub.js): paginated reading view, table of contents, arrow-key page turning and adjustable text size. Scripts in the book are disabled and content renders in a sandboxed frame; nothing is uploaded. Security: epub.js pulls @xmldom/xmldom ^0.7.5 (the <0.8.13 XML-serialization / recursion-DoS advisories); pinned to the patched 0.8.13 via an npm override (the browser uses native DOMParser, so xmldom isn't even on the runtime path — this just clears the scanner). npm audit no longer flags epubjs/xmldom. The ~250KB epub.js engine + shared jszip are named chunks (manualChunks) and excluded from the PWA precache (workbox globIgnore), lazy-loaded on first use. Pure TOC-flattening lib with 5 unit tests. Bilingual (EN + ID) UI, SEO, OG. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ubfx4XocHcECaL8twp9zsr
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What
New EPUB Reader in the Documents category — opens
.epube-books entirely client-side (epub.js). Paginated reading view, table of contents (jump to any chapter), arrow-key page turning, adjustable text size (− / +). Nothing is uploaded.Security
epub.js declares
@xmldom/xmldom: ^0.7.5, which carries the<0.8.13XML-serialization-injection + recursion-DoS advisories. Rather than theepubjs@0.4.2"fix" (which regresses to the even older unscopedxmldom@^0.1.27), this pins the maintained scoped package to the patched 0.8.13 via an npmoverride. In the browser epub.js uses the nativeDOMParser, so xmldom isn't even on the runtime path — the override just clears the scanner.npm auditno longer flags epubjs/xmldom. Additionally, EPUB scripts are disabled (allowScriptedContent: false) and content renders in a sandboxed frame.Bundle hygiene
epub.js bundles from its
src(itsmodulefield), which Rollup would nameindex.*and precache. AddedmanualChunksto emit stableepubjs(~250KB) + sharedjszip(~200KB) chunks, both excluded from the PWA precache (workbox globIgnore) and lazy-loaded on first use. Verified docx-viewer (also uses jszip) still builds.Details
src/tools/documents/epub-toc.lib.ts— pure nested-TOC → depth-tagged flat list, 5 unit testssrc/islands/documents/EpubReader.tsx— thin island, dynamic-imports epubjs, full resource teardown (rendition/book destroy on unmount + reset)epub-reader(beta); EN + ID SEO + OG/tools/epub-reader+/id/...)🤖 Generated with Claude Code