REPOSITORY DOSSIER  ·  github.com

facebook/react

6,965 files 16 languages 1,013,080 total lines @59aff3e analysed just now
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01Overview

react · 831,868 lines of actual code
6,965
Files
831,868
Code lines
79,800
Comments
16
Languages
70,532
Complexity
1
Secrets
Line Composition 1,013,080 total lines
Code831,86882.1%
Blank101,41210.0%
Comments79,8007.9%
~99%
tokens saved
Reading facebook/react via an LLM
~5.8M tokens → ~1.4k tokens via code_analyze

The entire repo summarised by code_analyze — structured JSON in <2k tokens. The dossier above is built from one call. Drill into specifics with code_search.

02Languages & Tech Stack

what it’s written in, what it depends on

Language Breakdown

Language
Files
Code
Share
JavaScript
3,830
536,275
64.5%
Markdown
2,011
131,056
15.8%
TypeScript
524
68,705
8.3%
Rust
121
65,486
7.9%
JSON
152
17,589
2.1%
CSS
108
4,519
0.5%
HTML
79
3,242
0.4%
YAML
31
3,001
0.4%
CoffeeScript
1
476
0.1%
+ 7 more
—
1,188
·

Tech Stack  (35 detected)

React 1473 Node.js Path 134 Node.js File System 96 Jest 55 Node.js Child Process 38 Chalk 31 Node.js Events 23 Webpack 22 Serde 19 React Native 14 Node.js OS 11 Express.js 9 Node.js HTTP 9 Cypress / Playwright 7 Zod 7 Redux 6 Testing Library 6 Node.js Crypto 5 Browser Fetch API 3 Electron 3 Inquirer 3 Puppeteer 3 Rollup 3 GraphQL.js 2 Next.js (React Framework) 2 Cheerio 1 Lodash 1 RxJS 1 Tailwind CSS 1 dotenv 1 esbuild 1 Rust Standard Library 54 modules

03Notable Files

where complexity and size live

Most Complex

FileLinesCx
packages/react-devtools-shared/src/backend/fiber/renderer.js6,4302,020
packages/react-server/src/ReactFlightServer.js5,6251,372
packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js5,7251,329
packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js5,9831,162
packages/react-server/src/ReactFizzServer.js5,3121,140
packages/react-client/src/ReactFlightClient.js4,7071,053
packages/react-reconciler/src/ReactFiberCommitWork.js4,5271,035
scripts/bench/benchmarks/pe-class-components/benchmark.js5,400996
scripts/bench/benchmarks/pe-functional-components/benchmark.js4,994996
scripts/bench/benchmarks/pe-no-components/benchmark.js4,758996

Largest

FileLinesCx
fixtures/attribute-behavior/AttributeTableSnapshot.md13,3920
fixtures/ssr2/package-lock.json12,8270
packages/react-dom/src/__tests__/ReactDOMFloat-test.js9,46370
packages/react-dom/src/__tests__/ReactDOMFizzServer-test.js9,410136
packages/eslint-plugin-react-hooks/__tests__/ESLintRuleExhaustiveDeps-test.js8,5397
compiler/crates/react_compiler_lowering/src/build_hir.rs6,695958
packages/react-devtools-shared/src/backend/fiber/renderer.js6,4302,020
packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js5,9831,162
packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js5,7251,329
packages/react-server/src/ReactFlightServer.js5,6251,372

04Code Quality

style, correctness, and maintainability findings

By Severity & Category

Warning
1278
Info
14576
Error
28
Total
15,882
By Category
accessibility 331 correctness 14801 maintainability 79 modernization 5 performance 544 safety 1 security 121

Top Findings

Critical: Use of 'unsafe' keyword bypasses Rust's safety guarantees. Requires careful auditing, clear justification (FFI, specific optimizations), and minimal scope.
compiler/crates/react_compiler_validation/src/validate_locals_not_reassigned_after_render.rs:270
Universal selector detected; avoid for performance and specificity issues
compiler/apps/playground/styles/globals.css:56
Use of !important detected; avoid overriding specificity with safer cascade management
compiler/apps/playground/styles/globals.css:142
Warning: Direct indexing (e.g., `vec[i]`, `slice[i]`) panics on out-of-bounds access. Prefer using `.get(index)` or `.get_mut(index)` which return Option<&T>/Option<&mut T>. ×2
compiler/crates/react_compiler/src/debug_print.rs:152 + 1 more

05Secrets & Credentials

pattern-based scan for hardcoded secrets
generic-api-key — Detected a Generic API Key, potentially exposing access to various services and sensitive operations.
compiler/packages/react-mcp-server/src/utils/algolia.ts:14

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