Tiptap is a headless, framework-agnostic rich text editor built on ProseMirror. It provides a core editor engine with an extension system for nodes, marks, and plugins. The architecture is a monorepo with separate packages for core, framework bindings (React, Vue), HTML/markdown conversion, static rendering, and dozens of first-party extensions. Key entry points are the Editor class, Extension/Node/Mark factories, and framework-specific components like EditorContent and useEditor. Data flows: user input → ProseMirror state → extension hooks → commands → transaction → view update. External dependencies: ProseMirror libraries, Yjs for collaboration, lowlight for code highlighting, Floating UI for popups. The codebase demonstrates high craftsmanship with a well-designed extension API, comprehensive test coverage, and reusable patterns for decoration management, markdown serialization, suggestion autocomplete, and static rendering.
SunEditor is a fully-featured, vanilla JavaScript WYSIWYG HTML editor library designed for modern browsers. It provides a rich text editing experience with extensive formatting options (inline, block, lists, tables, media embedding), multiple display modes (classic, inline, balloon), and a plugin architecture that supports dropdowns, modals, commands, browsers, and input fields. The editor is built around a clean dependency injection kernel, a reducer-based event handling system for keyboard and input events, and a modular structure for UI components (toolbar, menu, controllers) and file management. It includes built-in plugins for images, videos, audio, drawing, math expressions, autocomplete, slash commands, table editing, code view, markdown preview, and document layouts (A4 page breaks). The codebase is extensively tested with unit, integration, and e2e tests (Playwright), and follows strict architectural rules enforced by dependency-cruiser. It exports TypeScript definitions, supports internationalization (20+ languages), and integrates with popular frameworks via official React/Vue wrappers. The library is distributed via npm and CDN, and demonstrates a high level of engineering craftsmanship in its event system, DOM manipulation utilities, and plugin lifecycle management.
ReactPage (formerly ORY Editor) is a production-grade WYSIWYG page editor built in React. It provides a visual drag-and-drop interface for composing page layouts from a plugin system of content and layout cells. The editor stores its state as a structured JSON tree (not HTML), enabling versioning, migrations, and server-side rendering. It supports multi-language content, undo/redo, inline editing via Slate, and a read-only mode for lightweight rendering. The architecture is a monorepo with a core editor package, a rich set of content plugins (Slate rich text, image, video, spacer, divider, HTML5 video), a layout plugin (background with gradients/images), and a ReactAdmin integration. The editor is highly extensible: custom cell plugins can define their own renderers, controls (auto-generated forms via uniforms), cell styles, and data migrations. The Slate plugin itself is extensible via factory functions for marks, blocks, and data plugins. The project is used in production by several companies for CMS-like page building.
KindEditor is a client-side, WYSIWYG HTML editor library written in vanilla JavaScript. It replaces standard <textarea> elements with a rich text editing interface featuring a toolbar, iframe-based design mode, undo/redo stack, and a plugin system for extensibility. The architecture is built around custom DOM abstractions (KNode, KRange) that normalize cross-browser differences (IE6+, Firefox, WebKit, Opera), a widget system (KWidget, KDialog, KMenu) for UI components, and a built-in event system. The editor supports image/table/link insertion, multi-image Flash upload (SWFUpload), HTML sanitization, and MS Word paste cleanup -- all configurable through a central options object. Despite its full feature set and well-documented API, the project has been explicitly abandoned by its maintainers as stated in the README, with no upgrades planned. The codebase is heavily weighted toward legacy browser workarounds, uses an outdated build system (Grunt 0.4.1), bundles deprecated third-party libraries (SWFUpload, Firebug Lite, QUnit v1.x), and exhibits security risks (eval usage in JSON parsing). It remains functional for modern browsers but carries significant technical debt, making it unsuitable for new projects without heavy modernization.