This repository is a WYSIWYG H5 (HTML5) page editor enabling drag-and-drop creation of responsive web pages without coding. Built with React, TypeScript, and Umi 3.0 framework, it features a plugin-based architecture where components are defined by template (metadata) and schema (editable properties). The editor includes a canvas for arranging components, property panels for configuration, and tools for previewing, exporting, and saving templates. A Node.js/Koa backend provides endpoints for saving and retrieving HTML content. The application emphasizes extensibility and performance through patterns like dynamic component loading with caching, schema-driven form generation, and a modular component library. Key reusable components include a dynamic engine for lazy-loading components, an editable list with drag-and-drop reordering, and an on-screen calibration ruler for alignment. While the project is actively maintained, it shows some technical drift in dependency versions (e.g., React 16, Ant Design 4) and relies on a simple in-memory backend that may require adaptation for production use.