feat(documents): Spreadsheet Viewer — Excel / ODS / CSV - #142
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Open .xlsx/.xlsm, legacy .xls, OpenDocument .ods and .csv files entirely in the browser — every sheet rendered as a scrollable grid with column letters and row numbers. Cells show their Excel-formatted values (dates, currency, percentages), formulas as last-saved results. Nothing uploaded. Uses the patched SheetJS build (0.20.3, Apache-2.0) from SheetJS's own CDN tarball, not the CVE-affected npm 'xlsx' 0.18.5. The ~500KB engine is a lazy dynamic import and excluded from the PWA precache (workbox globIgnore). Bilingual (EN + ID) UI, SEO and OG. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ubfx4XocHcECaL8twp9zsr
Deploying with
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| Status | Name | Latest Commit | Updated (UTC) |
|---|---|---|---|
| ✅ Deployment successful! View logs |
goodwebtools | a79858e | Aug 02 2026, 03:40 PM |
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What
New Spreadsheet Viewer in the Documents category — opens
.xlsx,.xlsm, legacy.xls, OpenDocument.odsand.csvfiles entirely in the browser. Every sheet renders as a scrollable grid with column letters (A, B, C…) and row numbers, sheet tabs for multi-sheet workbooks. Cells show their Excel-formatted values (dates, currency, percentages); formulas show last-saved results. Nothing is uploaded.Security note
Uses the patched SheetJS 0.20.3 (Apache-2.0) installed from SheetJS's own CDN tarball — not the npm registry
xlsx@0.18.5, which carries the CVE-2023-30533 prototype-pollution and CVE-2024-22363 ReDoS advisories.npm auditconfirms our pinned build is not flagged. Bundled same-origin (no external runtime fetch); the ~500KB engine is a lazy dynamic import and excluded from the PWA precache via a workbox globIgnore.Details
src/tools/documents/spreadsheet.lib.ts— pure parse→grid lib (XLSX injected, kept lazy), 14 unit tests (col labels, ragged-row padding, row/col caps, date formatting)src/islands/documents/SpreadsheetViewer.tsx— thin island, dynamic-imports xlsxspreadsheet-viewer(beta); EN + ID SEO + OG/tools/spreadsheet-viewer+/id/...)🤖 Generated with Claude Code