v0.14.0 - HTML + print-CSS input path

The release that adds a second front door to the engine: @formepdf/html, an HTML + print-CSS input path — "Satori for paginated documents." Write HTML with @page rules, feed it to renderHtml() or the forme-html CLI, get a paginated, deterministic PDF from the same Rust engine that renders JSX. No headless browser anywhere in the pipeline. Also: a layout-shape contract change for tables, four engine layout fixes, and HTML preview support across the renderer, CLI dev server, and VS Code extension.

Added

@formepdf/html — first public release. The engine compiled to WASM behind an HTML front end:

• Stylesheets, not just inline styles: type/class/id/universal selectors, compounds, descendant/child combinators, grouping, the :nth-child and :nth-of-type families — with full cascade semantics including !important.
• Paged media: @page size and margins, :first variants, margin boxes with counter(page) / counter(pages), break-* (plus legacy page-break-* aliases), orphans/widows, and @media media-type evaluation — print is the native media type.
• Tables: border-collapse emulation, <thead> repetition across page breaks, colspan/rowspan, vertical-align (and legacy valign).
• Typography: justified text, text-transform, letter-spacing, and provided fonts via options.fonts / --font, with a documented migration recipe for web fonts.
• The warnings contract: everything outside the supported subset is named — skipped stylesheet links, @imports, @font-face families, unsupported properties. Nothing is silently dropped.

Determinism is load-bearing: CI renders the fixture corpus through both the native binary and the WASM build and requires byte-identical PDFs.

Engine — @page :first, vertical-align, min/max constraints. Page one can carry its own PageConfig (size, margins, fixed-element filtering via First/NotFirst); table cells align content top/middle/bottom; and max-width/min-width/min-height now clamp properly — auto width + finite max-width + auto margins is the centered-column idiom, and it works.

Renderer / CLI / VS Code — HTML preview everywhere. renderHtmlFromFile / renderHtmlFromSource in @formepdf/renderer return the same PDF-bytes + LayoutInfo shape as the JSX pipeline, so every preview surface lights up unchanged: the CLI dev server and the VS Code extension both live-preview .html files with the full component tree, inspector, and layout overlays. The extension now bundles two WASM snapshots and hash-verifies both against their package sources at build time.

⚠️ Layout-shape contract change — Table wrapper node

ElementNodeType gains 'Table'. Layout used to unwrap <Table> into loose sibling TableRow nodes; it now emits a Table container element per page fragment with the rows nested inside. Two reasons: table-level border/background finally have a paint target, and structural consumers (tagged PDF /Table, extractors) get a real table node. If you walk LayoutInfo for TableRow nodes directly, look inside Table wrappers now — or use getTableRows() from @formepdf/core/layout, which handles both shapes (loose rows from stored pre-0.14 layouts still return).

Fixed

• Runs-based text measured zero intrinsic width. measure_intrinsic_width ignored runs (and measured leaf Headings as 0, and whole multi-line strings instead of the widest line) — flex rows could collapse styled text to one character per line.
• col_span was ignored when indexing column widths. Every cell after a colspan cell sat one column too far left; the spanning cell now consumes its columns' combined width in both layout and row-height measurement.
• wrap: false on tables was silently ignored. Row-by-row pagination never consulted breakability; an unbreakable table that fits a fresh page now moves there whole (break-inside: avoid in the HTML path).
• A flex line taller than the page emitted a blank leading page before overflowing anyway; the break check now skips when the current page is empty.

Docker images — security refresh

formepdf/forme and formepdf/rasterizer are published again at 0.14.0 (multi-arch, amd64 + arm64), rejoining the shared version line after being frozen at 0.10.5. Rebuilt on Alpine/musl with PDFium chromium/8021 — Docker Scout reports zero vulnerable packages on both, and the server image dropped from 150 MB to 24 MB.

Full changelog

@formepdf/html · engine · @formepdf/core · @formepdf/renderer · vscode · @formepdf/svelte

All other @formepdf/* packages, the forme-pdf crate on crates.io, the Python SDK, and the Go SDK got version-alignment bumps to 0.14.0.