--- title: "Didact Fiber: Incremental reconciliation" url: https://daily.dev/posts/didact-fiber-incremental-reconciliation-yzwbymwey source_url: https://medium.com/hexacta-engineering/didact-fiber-incremental-reconciliation-b2fe028dcaec type: article source: "Rodrigo Pombo" published: 2026-03-31T12:30:12.878Z updated: 2026-03-31T12:40:14.167Z tags: ["javascript", "react"] reading_time: 16 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Didact Fiber: Incremental reconciliation **[Rodrigo Pombo](https://daily.dev/sources/pomb)** · 16 min read · 0 upvotes · 0 comments ## Summary A deep-dive tutorial rebuilding React 16's Fiber architecture from scratch as a learning exercise called 'Didact'. Covers the fiber data structure (parent/child/sibling/alternate properties), incremental reconciliation using requestIdleCallback for scheduling, the work-in-progress tree concept, effect tags (PLACEMENT, UPDATE, DELETION), and the commit phase for DOM mutations. Explains why recursive reconciliation was replaced with a loop-based approach to allow pausing and resuming work without blocking the main thread. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [A deep dive into React Fiber](https://daily.dev/posts/a-deep-dive-into-react-fiber-02afflafp) · LogRocket · 16 upvotes · 0 comments - [React Behind The Scenes: Virtual DOM, Reconciliation, Render Phase, Commit Phase & Fiber Explained.](https://daily.dev/posts/react-behind-the-scenes-virtual-dom-reconciliation-render-phase-commit-phase-fiber-explained--9uynk7eyd) · Medium · 5 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#react](https://daily.dev/tags/react) [View this post on daily.dev](https://daily.dev/posts/didact-fiber-incremental-reconciliation-yzwbymwey)