Extensions

Extensions are ordinary packages built on the engine's public API. Nothing in them reaches into private code, and every one of them is built on the same four hooks: schema merging, onTransaction, addDispatchTransform and setDecorationLayer, plus keymap, inputRules, nodeViews and the suggestion trigger module.

Two kinds:

• Schema extensions export node or mark specs you merge into your Schema: tableNodes(), imageNodes(), blockNodes(), embedNodes(), mathNodes(), trackChangesMarks().
• Behaviour extensions attach to an editor and return a controller or a disposer: image(editor, ...), codeHighlight(editor, ...), diagram(editor, ...), createWritingAssistant(editor, ...), new TrackChanges(editor, ...).

Each page below covers one package: what it adds, the calls, and the decisions behind it that are worth knowing before you rely on them.

Package	Adds
@trevixal/extension-table	Tables: structure, merge and split, header row, alignment, background, borders, sort, resize, CSV in and out, text to table and back
@trevixal/extension-image	Images: pluggable storage, drag/paste/pick upload with progress and cancellation, resize, crop, rotate, compress, captions, alignment, a floating toolbar
@trevixal/extension-blocks	Callouts, toggles, columns, cards, timelines, page breaks, badges, buttons, footnotes, tabs, accordions, citations and reference lists, anchors
@trevixal/extension-embed	Video, audio, YouTube and Vimeo, allowlisted iframes, file attachments, link preview cards
@trevixal/extension-math	LaTeX to MathML for inline and display equations, the $...$ input rule, a pluggable renderer
@trevixal/extension-diagram	Live diagram previews under code blocks through any renderer; a Mermaid adapter and lazy loader included
@trevixal/extension-export	DOCX and RTF writers and a DOCX reader, with their own ZIP and XML implementations
@trevixal/extension-security	PBKDF2 and AES-GCM document encryption with expiry, an encrypted storage wrapper, restrictions
@trevixal/extension-writing	Readability, passive voice, repeated words, long sentences, grammar, keyword density, goals, spell-check toggle
@trevixal/extension-workspace	A document store with folders and templates, a tab strip, a workspace panel, a split preview or mirrored editor
@trevixal/extension-track-changes	Suggestion mode: attributed, timestamped insertions and deletions; accept and reject; a review bar
@trevixal/extension-code-highlight	Twelve bundled languages behind one Highlighter interface, language detection, copy-code buttons
@trevixal/extension-format-code	JSON and XML pretty-printing and minification, in place
@trevixal/extension-slash-command	The / menu: fuzzy filtering, keyboard-first, an extensible item list
@trevixal/extension-emoji	The : picker with 114 built-in emoji and search

Every one has no runtime dependencies, declares @trevixal/core as a peer dependency, and ships ESM, CJS and type declarations. The assembled @trevixal/editor-kit wires all fifteen together; its mount.ts makes every call below once, in order.

To write one of your own, start with the callout tutorial.