Everything since 0.3.0 on 2026-09-09: a cover page as the file draws it — page-placed
frames, themed shape colours, floating tables, drawing groups — the run-through wrap
modes as pickable frames, a text box's vertical anchor, the fonts a saved document
carries with it, the header band's height and the table inside it, and the selection
surviving an attribute change.
Everything since 0.2.0 on 2026-09-06: the run of load and typing latency work,
each tab editing its own document, the format prompt on a first save, the
unsaved-close warning, and two fixes.
Everything since the 0.1.0 launch on 2026-08-17: named list styles, chapter
numbering, the letter templates and DIN 5008 marks, password protection in both
formats, comment threads with margin balloons, the book layout, the inline text
box, and the run of Word / LibreOffice interoperability, round-trip and page-layout
fixes behind the parity corpus, the fuzzed export options and the browser runs.
0.1.0 keeps its own date and scope; its open-items list drops password protection,
which now ships.
ODF says it with style:page-usage right/left on the section's page layout (read
only where the master is no half of a mirrored pair, which alternates by itself),
Word with a w:type oddPage/evenPage section break; both insert the blank page the
side needs, and so does pagination now — the printed number decides the side.
In the ribbon's Breaks menu under "This section". Measured against the reference
that keeps LibreOffice's own blank pages: the largest fixture 875 → 774 reports,
another 25 → 30 with its page count 27 → 29 against LibreOffice's 32.
The inner/outer pair was read from a file, rendered and written back, but nothing
could turn it on — a book layout could only be inherited. Both margin UIs get a
checkbox beside the four fields, and while it is on the left/right fields read
Inner/Outer. A margin preset changes the values, not whether the setup is a book.
`withMirrored` keeps the key absent rather than false, so an unmirrored page setup
still compares equal. Driven headlessly: ticking it stores the flag, renames the
fields and moves an even page's text by the difference (1.5/3cm → 57px).
The zone is a one-paragraph document, so a box's paragraphs had nowhere to go
and were dropped with the drawing — which took the band down with them: a
letterhead whose logo box holds two empty spacer lines came out 7.6mm short on
every page, while the same document's DOCX twin, where the converter had already
flattened the box, was right. They become lines of the zone ahead of the
paragraph that anchors it now, as that converter makes them. Fixture 48 → 44,
and the two formats agree again.
Corrects two probed claims that measurement contradicted: a hard page break
does *not* swallow the block's space above (only an automatic one does), and
the header band is max(declared height, content + gap) rather than a line
count. Adds the chapter-numbering model, the mirrored master pair, and the
harness ceiling a CSS-drawn label is.
Adds the Unreleased section: named list styles, the template gallery
with the two letters and fold marks, the schema-validity and duplicate
heading-style fixes, and a design note on the Liberation/Microsoft
metric font pairs the exports translate between.
The fit test is a step function on a block chain that agrees with
LibreOffice to well under the harness's millimetre. Measured: a paragraph
whose flow box ends 0.62mm past the content end is pushed over, where the
reference keeps it, and the block behind it then draws its space-before in
full — 14.8mm on every line of that page.
A tolerance on the fit test was tried and reverted, corpus 1074 → 1085:
the error carries no sign, so the slack that fixes one fixture keeps two
lines another one's reference pushes.
Word's TOC \n and an ODF entry template naming no index-entry-page-number both
say the rows are text alone; we drew leaders and live numbers over them either
way. Carried as the node's own pageNumbers attr, off only — the node view had
the page-less row already, for the bibliography. The exports write the switch
back out: \n over the whole level range, and the ODF template drops the tab
stop with the number, which is the pair LibreOffice's dialog switches together.
Both importers drop a mark the block's style supplies, and a heading's bold was
taken as given. The registry style that renders it is the file's, though —
re-parented to Standard wherever the file declares a basedOn / parent-style-name
— so nothing supplied what the mark had been deleted for, and a 23pt title line
came out 149.7mm against LibreOffice's 161.7. Gated on that parent now; a
LibreOffice file, which writes fo:font-weight on every Heading_20_N, is
untouched. Parity corpus 1892 → 1889.
A v:rect flagged o:hr is the line itself, not a shape: its height and
fillcolor become the paragraph's borderBottom (1.5pt/#A0A0A0 where the file
names none), a real w:pBdr keeping precedence — only one line can be drawn.
It was dropped with the "Drawings were removed" warning until now, which the
changelog's gap list did not admit to either.
Both products name the tool after what it is, which says nothing to a
reader who does not know the word. Every label is "Synonyms" now — ribbon,
context menu, tools menu, dialog — and "thesaurus" stays in the tooltip so
it is still findable by name. Keys and code keep the technical name.
Ctrl+F7, Review ▸ Thesaurus and the context menu open one dialog: the
word at the caret, the sense groups it is in, click one to replace it,
and a box to look up any other word. The data is MyThes re-packed to one
group per line (de 3.0MB/37k groups, en 6.7MB/143k) — the format repeats
every group once per member, ten times the bytes. Loaded on first use for
the document's language and scanned, not indexed: ~4ms a lookup, where a
word→group index measured ~100MB of memory against the text's ~8MB.
View ▸ Multiple Pages (1–4): rows of pages filled left to right, scrolling
as one canvas, every page editable. Neither reference product stops at two —
LibreOffice takes a column count, Word fits what the window allows — and both
re-zoom for it, so a whole row is fitted when the count changes. A pane is a
grid cell clipped to one page, a view showing only a contiguous slice; two
rows of cells take turns as the upper one. Cost: columns x 2 live views, each
holding the whole document (measured: +94k nodes and +16ms per keystroke per
view at 177 pages).
A new document starts with it off and an import adopts the file's own
flag, so an editor left recording no longer marks the next document it
opens. Both formats carry it, probed against soffice: ODF on the change
registry (text:track-changes, written for the flag alone where nothing
is recorded yet), Word as w:trackRevisions in settings.xml — LibreOffice
writes and reads exactly those two, and reading w:trackChanges instead
would have found nothing.
View ▸ Split (Ctrl+Alt+S): a second live view of the editor's state, stacked
below the first and editable the same way. The panes share a width, so the
second renders the pagination the first measures — pageBreaks, columnsFlow
and tabStops skip the pass on a split pane rather than run it twice.
Every widget decoration now builds its DOM in a function: two views render
one decoration set, and a shared node is taken back and forth between the
two documents until the tab locks up (measured on a two-page document).
Each of the three architectural ones now says what stands in the way —
a layout engine for chained frames, a compound-file writer for Word's
encryption, the pagination pass for a second live view.
A polygon, a polyline, a curve or a connector's elbow used to be dropped
with a warning; it now rides the box as an SVG path in the 0…100 box a
preset's points use, and the editor draws it. Read from all four dialects
the two products write (ODF points and svg:d, a non-primitive
enhanced-path, DrawingML custGeom, VML's reversed-case path), written
back as enhanced-path and custGeom — LibreOffice renders both exactly as
the editor draws them. An open outline is stroked, never filled.
Ten documents the docx lib authors directly, plus the ODT twin
LibreOffice converts each into, now live in tests/corpus/ instead of the
gitignored fixtures dir. corpus.test.ts asserts both formats of a
document read the same and that each survives our export and import
either way. The heading styles gained the outline level Word writes —
without it LibreOffice converts a heading to a paragraph that merely
carries the style, and the two formats disagreed.
Both come from the document's language, read off Intl: the symbol's side
and spacing, the short date's order and padding. Each minted data style
names that language — without it LibreOffice prints its own locale's
separators (probed: a German document's 1.234,00 € came out $1,234.00).
A date is a serial day from LibreOffice's day 0, 1899-12-30. Word's
formula dialog offers no date, so the DOCX leg uses the field's \@
picture. Also drops a document's name from three older comments.
The three attrs LibreOffice's Format… dialog is mostly about, on both
sides of the bar. They live together on one TextStyle mark and a mark of
one type replaces that type whole, so each run's own attrs are the base of
the new one — recolouring leaves the font alone.
F3 was bound twice from here on: it now expands an AutoText shortcut where
the caret has one, as it does in both word processors, and finds the next
match otherwise.
Word's Text Direction and LibreOffice's, on the frame's own toolbar: the
browser lays the vertical flow out, so the box needs nothing but the mode.
ODF keeps it in the frame style's *paragraph* properties — probed: in the
graphic properties LibreOffice drops it, there it keeps it and lays the box
out — and Word in the shape body's `vert`, the VML fallback's
`layout-flow:vertical` read too. Both survive a LibreOffice re-save.
The Formula dialog gains the number format Word's has: whole numbers, two
decimals, grouped thousands and the two percentages beside the general
one.
ODF keeps it on the cell *style* as a reference to a data style — odf-kit
shares one cell style across every cell, so a formatted cell gets a copy
of it — and LibreOffice writes both back unchanged. Word keeps it on the
field as its \# switch; LibreOffice's DOCX filter neither reads nor writes
that switch, so that leg holds through our own round trip.
Ruby, as both products' phonetic guide writes it: one element holding a
base and its reading, so the editor keeps it as one inline atom and the
browser sets it as a real <ruby>.
ODF gets <text:ruby> plus a minted ruby-family style (centred, above —
probed: LibreOffice writes that style back unchanged); Word a <w:ruby> run
from a post-pack pass, the package having none. Both legs verified through
a LibreOffice re-save, our .docx to .odt included.
LibreOffice's Tools ▸ AutoText, in the ribbon where Word keeps its Quick
Parts: store the selection under a name and a shortcut, insert it from the
library or by typing the shortcut and pressing F3 — LibreOffice's key for
it.
An entry is HTML parsed back through the schema, so it keeps its marks and
blocks; the library is app-level, as it is in both products, so no file
carries it.
LibreOffice's Word Completion, its defaults included: words from eight
letters up are collected as they are finished, and the first three
letters offer the rest. The offer is a widget decoration after the caret,
so it is outside the document until Enter takes it — nothing to undo when
it is not taken.
Only while typing: a bare caret move drops the offer, or an Enter meant to
split the paragraph would complete a word instead. The settings share the
AutoCorrect dialog, as they share LibreOffice's.
The ¶ toggle adds a format to each side: bold / italic / underline and a
paragraph style, as LibreOffice's Format… and its Paragraph Styles box.
A format narrows a text search to the runs carrying it, and with no term
the formatting is the search — every such run, or every paragraph in the
style, empty ones included.
A replacement with no text only reformats, which is how a document gets
restyled without retyping it; a heading style switches the node type over
the way setParagraphStyle does, so the extension takes the same sheet.
Both dialogs offer three sort keys and let you pick the type; only the
first key was offered, and the type was always the detected one. A later
key decides only where the ones before tie, and the sort stays stable.
Alphanumeric is the plain collation ("10" before "2") — that is what
choosing it over the detected type is for, so the two collators differ in
`numeric`. Sorted numerically, a cell that is no number sorts last either
way, as an empty cell does in a spreadsheet.
Cite by short name (LibreOffice's own), numbered, APA, MLA or Chicago:
the style sets the citation's label and the row's shape, and rides the
bibliography index node — ODF as the entry template LibreOffice
regenerates its rows from (verified through a re-save), Word as the
sources part's StyleName. Labels are derived and kept true by an
appendTransaction, so adding a citation renumbers the rest.
A section narrower than the reserved sheet now splits the difference
between its insets instead of hanging it all on the right, and every
per-page layer draws from the box's own left — sheet, header/footer, page
border and line numbers. The ribbon's Size menu gains the same per-section
block Orientation already had.
Word's Start at, per section: ODF writes style:page-number on the
paragraph that switches master page, DOCX a w:pgNumType w:start. That
section is no longer exported as a continuous break — probed, LibreOffice
drops the start off a continuous one, and neither word processor honours
it there. The footer counts from the nearest restart at or above the page.
Every recorded change in document order beside the comments pane: author,
date, the text, accept or reject in place. A change split by a paragraph
boundary is one row, so acceptRevision/rejectRevision take an id. The
author colour is a decoration, since a mark cannot know the document's
other authors; it nests inside the mark's span and carries the under/
strikethrough with it. shortcutHint no longer throws on an id nothing
binds, which heading 7-10 had just made reachable.
HTML stops at h6, so 7-10 render as unknown elements editor.css makes
blocks; their built-in styles continue level 6 at 12pt, since LibreOffice
writes these styles with no properties and resolves them from its own
pool. Both importers read a two-digit level again (the style-name regexes
stopped at one digit). Verified through a LibreOffice re-save of both
formats and in the live editor.
LibreOffice's Format > Paragraph > Text Flow checkbox. Only "off"
travels (Word has no per-paragraph "on") and only under a document that
hyphenates, or it would say what is already true. ODF writes
fo:hyphenate="false" into the paragraph's text properties, DOCX gains
w:suppressAutoHyphens through a post-pack pass — the docx package
exposes no option for it. Both survive a LibreOffice re-save.
The manifest registers .odt/.ott/.docx/.dotx as file handlers and a
launchQueue consumer opens what the OS passes, keeping the handle so the
first Save writes that file. A .dotx now reads like an .ott: Word's
importer, but never bound as the file to save over.
Two endpoints rather than a box: no text, no fill, and the diagonal of
the frame with `flipV` picking which one. The three kinds share their
preset names, since the heads a file declares are what tell them apart.
ODF gives a line its own element and its heads a named marker, which
needs the draw: prefix declared in styles.xml — undeclared, the file
does not parse at all. Word keeps the frame and flips it.
The Navigator was still listed as missing; only split view is. Formula
recalculation stops the walk at the blocks a table cannot be in, or it
visits every run of the document per keystroke. One dead CSS rule goes,
so svelte-check reports nothing at all.
Nothing here talks to a server at runtime, so a cached shell is the whole
editor. The worker reads the build's hashed asset names out of the entry
document, which precaches without a build step; the document itself stays
network-first, or it would keep naming the assets of the build it was
cached with. Matching ignores Vary: a precached asset is fetched without
the page's Origin, and a server answering "Vary: Origin" never matches it.
Verified in a headless Chromium with the network cut.
The formula rides the cell, as ODF writes it; Word's field syntax is what
is stored, since it is the wider language. `ooow:` in the ODF attribute
value is a namespace prefix — undeclared, LibreOffice reads it as part of
the formula and prints "Expression is faulty".
Sort takes one key and detects the type per cell where both dialogs make
you pick. Number recognition is off by default, as it is in LibreOffice,
and a formula parses a cell's text either way — exactly as there.
The page grid was one repeating cycle, so every page had to be the same
size. It is now a table of height runs the placement pass grows as each
section's first page becomes known, and the sheets are one box per page
instead of a repeating gradient — .paper reserves the widest section's
paper, a narrower one takes the difference as a right inset.
Layout ▸ Orientation offers "this section"; the size stays document-wide
in the ribbon but round-trips per section from a file.
The citation is an inline atom holding the whole record, which is what ODF
writes on text:bibliography-mark — so no database travels beside the file.
The list is a new index family: one row per source, in document order and
without page numbers, as LibreOffice prints one.
DOCX cites by tag and keeps the sources in a custom-XML part the docx
package knows nothing about, so the post-pack pass mints the part, its
properties, both relationships and the content type itself.
References ▸ Index entry marks a place with the term the index should
list — under a key of its own where it belongs elsewhere — and the Index
in the same menu lists each term once, sorted case-insensitively, with
every page it was marked on.
Both formats write a place, not a range, so the entry is an inline atom:
ODF text:alphabetical-index-mark plus text:alphabetical-index, Word XE
plus INDEX. LibreOffice reads our file back unchanged. The bibliography,
the other half of that gap, is still open.
F5 (LibreOffice's key) opens an outline of the document's headings:
click one to jump, and move it up or down or promote/demote its level,
each carrying everything under the heading. Below it the tables,
pictures and bookmarks LibreOffice's Navigator also lists.
A move swaps with the adjacent chapter at the same level and stops at a
heading above it, so a subheading never reparents itself. The pane docks
right beside the comments one — the classic chrome's Tools chip owns the
left edge.
A .ott/.dotx is the built document with one label changed — ODF's
package media type, Word's content type for the document part — so the
picker offers both and the chosen extension decides which exporter runs.
Opening or saving also records the file in a recent list. The name is in
localStorage so the menu draws at once; the handle that reopens it is in
IndexedDB beside it. A file that has moved, or whose permission the
browser drops on reload, is reported and dropped from the list.
A handful of photos is the whole ~5 MB quota, and past it the document
stopped saving. The autosaved JSON now keeps an `idb:<key>` per picture
and the bytes live in their own store; the key is a sampled content
hash, so a picture used twice is stored once and each save sweeps what
the document no longer names.
loadDocument is async as a result and Editor.svelte awaits it. Where
IndexedDB is unavailable the data-URIs stay inline exactly as before.
Steffen Becker