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本文深度剖析了现代前端 UI 架构的两大基石：组件化 (Componentization) 与虚拟 DOM (Virtual DOM)。内容系统性地阐述了 UI 组件作为状态到视图的映射函数，以及虚拟 DOM 作为 UI 的声明式、内存中表示。
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