Rich Text Editor Evolution and Extension Guide: From Selection to Customization

This article provides a comprehensive guide to rich text editors, using game character analogies to explain their evolution, selection, and extension strategies.

What is a Rich Text Editor — A rich text editor integrates formatting settings, media embedding, and social interaction features, providing users with diverse presentation effects through a WYSIWYG interface. Examples include forums, communities, and comment systems.

Editor Forms — Rich text editors typically have three common modes: Classic Mode, Document Mode, and Inline Mode. The essential components include the content editing area, status bar (recordable, can be hidden), and toolbar (adjustable position, timing, or controlled via shortcuts).

Development History (L0-L3)

L0→L1 : Initial editors relied on browser's execCommand with limited commands. L1 introduced custom execCommand for richer functionality.

L1→L2 : To solve data-view inconsistency issues, custom data models were introduced. Different editors (Quill, ProseMirror, Draft, Slate) have different data models for the same HTML. This phase solved dirty data problems and enabled data-driven customization, cross-platform parsing, and online collaboration.

L2→L3 : To address contentEditable's uncontrollability, Google Docs pioneered self-developed layout engines, achieving higher extensibility at the cost of increased development complexity.

Selection Guide — Choose editor stage based on business needs: L2/L3 for core editor or collaboration features; L2 for frequent iterations with high interaction requirements; L1/L2 for stable requirements. Consider factors like open-source status, community ecosystem, interaction details, extension support, and customization cost.

Extension Methods

Toolbar Extension : Combine and transform toolbar functions. Two approaches: control native UI styles via strokeColor/fillColor, or replace buttons with SVG icons.

Menu Bar Extension : Add inline menus for images, tables, or context menus. Either use API configuration or listen to cursor position changes.

Internal Extension : Extend from Model, View, and Controller modules. Data model extension adds new data objects and binds HTML structures. View extension changes visual presentation via CSS classes or DOM structure changes. Controller extension uses events (active skills) and commands (passive skills) for control.

New Plugin Development : Requires defining data model, custom toolbar buttons, events/commands, cursor selection association, undo/redo management, and paste control.

Theme Customization — Two approaches: introduce new theme CSS files for style overrides, or build independent toolbar components detached from the editor.