do-once

html-editor —— 扩展驱动的 HTML 可视化编辑 SDK，框架/扩展/命令三层解耦，扩展可插拔，命令驱动跨扩展通信，支持选择拖拽、富文本编辑、撤销重做与序列化导出。An extension-driven HTML visual editor SDK with pluggable extensions, command-based communication, and built-in selection, drag-move, rich text editing, undo/redo, and HTML serialization.