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本文深度剖析了 React 的内部渲染管线，系统性地阐述了从状态更新触发到 DOM 变更的四个核心阶段：触发 (Trigger)、调度 (Schedule)、渲染 (Render) 和提交 (Commit)。笔记详细拆解了 Fiber 架构下的协调 (Reconciliation) 过程、Scheduler 的优先级调度机制，以及并发模式下可中断的渲染与同步的提交阶段。
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