Changelog

This page summarizes each versioned Imposia release. @imposia/core, @imposia/viewer, @imposia/client, and @imposia/react use the same version number; the complete record is the repository's CHANGELOG.md.

0.5.0 — August 20, 2026

Core parses with the browser's native parser, and a pagination performance batch reduced layout-measurement work on long documents.

• Replaced parse5 with browser-native parsing (DOMParser, template fragment parsing, native serialization); malformed markup may parse differently than before, and parse5 and entities left the Core bundle.
• Patched the bundled postcss and transitive nanoid dependencies flagged by the production vulnerability audit.
• Placed sibling runs as chunks and bisected only on overflow, removing a forced synchronous reflow and an inline-overflow check per node.
• Derived page-crossing text splits from line-box rects instead of one measurement call per grapheme; on the project's long-paragraph fixtures, getClientRects calls fell 98.1% for English and 95.9% for CJK text.
• Shared one resolver call, decode validation, and Blob URL for same-URL assets within a generation, without changing per-occurrence byte accounting or extension veto semantics.
• Minified the browser bundles and re-based bundle-size budgets. Each new fast path ships beside a temporary internal fallback for one release, which is why the Core bundle grew this release.
• Fixed a Viewer error that could surface when a host updated a document under load: the Viewer's ambient synchronization now waits out the brief window between a commit landing in the canonical frame and the host delivering the new PageDocument, instead of reporting that transient as page-marker corruption. Explicit calls still validate, and real corruption is still reported.

0.4.1 — July 27, 2026

Multi-page printing became reliable under caller viewport constraints, and Viewer panels follow the responsive control rail.

• Prevented caller-authored html and body viewport constraints from clipping the isolated native-print snapshot to one sheet while preserving the source document's print cascade.
• Positioned Viewer TOC, search, thumbnail, and Inspector panels below the actual responsive control rail, including the wrapped 320 px layout.
• Reorganized the localized documentation around getting started, concepts, publishing guides, package API references, and browser-native Save as PDF.

Read the 0.4.1 release notes.

0.4.0 — July 24, 2026

Cooperative pagination keeps long HTML and CSR updates responsive without changing the accepted page structure.

• Added an 8 ms default yield budget, an injectable scheduler, and an Infinity opt-out through PageDocumentOptions.compose.
• Added provisional progress with the completed page count and convergence pass.
• Settled fonts and images after staging content and styles are mounted.
• Made scheduler waits abortable and serialized superseding generations before staging the winner.
• Preserved source html and body context, body-scoped selectors, and computed custom properties in native-print snapshots.
• Added layout containment to committed page roots while leaving style containment disabled so counters keep working across pages.

Read the 0.4.0 release notes.

0.3.0 — July 24, 2026

Printing became independent from iframe sizing, and constrained table composition gained explicit extension hooks.

• Moved native printing to a transient, isolated snapshot in the top document to avoid Chromium blank-sheet failures.
• Added synchronous finalizePage hooks for Core and Publication extensions.
• Added the opt-in createTableColgroupExtension() preset for stable split-table column widths.
• Used the current page's remaining space when fragmenting split tables, safe grids, and over-tall normal blocks.

Read the 0.3.0 release notes.

0.2.0 — July 24, 2026

Viewer controls became fully composable by host applications.

• Added controls: false for hosts that provide their own navigation, view-mode, and zoom UI.
• Added immediate Viewer state subscriptions, React state callbacks, and imperative navigation and zoom controls.
• Scoped Viewer tokens and presentation styles to each Viewer root so importing the stylesheet no longer changes the host page.

Read the 0.2.0 release notes.

0.1.3 — July 23, 2026

HTML and CSR pagination integrity became the primary product contract.

• Added cross-browser continuity coverage that proves source tokens appear exactly once and in order across committed pages.
• Added a public CSR continuity specimen that applies rapid source revisions while retaining the canonical iframe.
• Positioned reflowable EPUB as a supported semantic projection rather than the headline rendering path.

Read the 0.1.3 release notes.

0.1.2 — July 23, 2026

Release checks and the demo server's security posture were tightened.

• Added automatic CodeRabbit review alongside verification and code-scanning checks.
• Removed unused demo-server request-delay behavior and resolved the related CodeQL finding.
• Confirmed that structural selectors reach only Element.matches() with conservative fallback behavior.

Read the 0.1.2 release notes.

0.1.1 — July 23, 2026

The demo, documentation, and release path became ready for public package updates.

• Added portrait-first A4 controls with orientation switching and A3, A4, and B1 presets.
• Expanded multilingual API and publishing documentation.
• Added a protected GitHub Actions release path with npm trusted publishing, tags, GitHub Releases, tarballs, and checksums.

Read the 0.1.1 release notes.

0.1.0 — July 19, 2026

The initial browser-only release established the complete public package family.

• Added deterministic browser pagination in one persistent canonical iframe.
• Added Viewer presentation, the browser Client entrypoint, and the primary React adapter.
• Added Publication composition, reader navigation, search, thumbnails, and multiple presentation modes.
• Added native print and reflowable EPUB 3.3 export from the committed source.
• Added typed diagnostics, bounded extensions, asset resolution, and constrained table, Flex, Grid, multi-column, and CJK fragmentation.

View @imposia/core 0.1.0 on npm.