# Bogdan-Lyashenko/Under-the-hood-ReactJS

Entire React code base explanation by visual block schemes (Stack version)

Repository: https://github.com/Bogdan-Lyashenko/Under-the-hood-ReactJS
Canonical: https://ross.abutalabs.com/products/under-the-hood-reactjs
Homepage: https://bogdan-lyashenko.github.io/Under-the-hood-ReactJS/
Language: JavaScript
License: MIT
License Family: permissive
Topics: reactjs, javascript, webdevelopment, debugging, visualization, flow, hood, scheme, fiber, stack, reconciliation, virtualdom
Last push: 2022-04-25T11:06:33+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3359, "days_push": 1591, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6773, forks 615 (observed 2026-08-28T04:09:48.452430+00:00)

## What it is
A detailed educational guide explaining React's internal codebase through visual block schemes, covering the legacy Stack reconciler (React v15.4.2) with Fiber coverage in progress. It is a documentation/learning project, not runnable software.

## Use cases
- understand how React works internally
- learn how the React stack reconciler works
- visualize React's virtual DOM reconciliation flow
- study React source code with diagrams
- prepare for React framework interviews
- learn the differences between React Stack and Fiber reconcilers

## When to choose
- you want a deep, diagram-driven walkthrough of legacy React internals
- you maintain or debug code on older React versions using the stack reconciler
- you prefer visual flowcharts paired with step-by-step explanations

## When to avoid
- you need up-to-date documentation for modern React 18+ internals
- you want a runnable tool or library rather than reading material
- you only need beginner-level React usage tutorials

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation, developer-tools
- domain: web-development, frontend, tutorials, programming-languages
- platform: cross-platform
- tags: react, react-internals, virtual-dom, reconciliation, fiber, stack-reconciler, codebase-explainer, visualization, debugging, web-server

## Member repositories
- Bogdan-Lyashenko/Under-the-hood-ReactJS (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:48.452430+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:42:24.364377+00:00, confidence not recorded.
  - readme: https://github.com/Bogdan-Lyashenko/Under-the-hood-ReactJS (fetched 2026-08-28T04:09:48.452430+00:00, sha 792410f0e57a)
  - homepage: https://bogdan-lyashenko.github.io/Under-the-hood-ReactJS/ (fetched 2026-08-29T08:38:42.423332+00:00, sha 414851d05497)
  - registry_npm: https://registry.npmjs.org/under-the-hood-reactjs (fetched 2026-08-29T08:38:42.432814+00:00, sha c4e5f9516326)
- Data as of 2026-08-30T08:39:29.467469+00:00.