REPOSITORY DOSSIER  ·  github.com

facebook/react

6,963 files 16 languages 1,008,697 total lines @99e8606 analysed just now
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01Overview

react · 828,353 lines of actual code
6,963
Files
828,353
Code lines
79,342
Comments
16
Languages
53,936
Complexity
1
Secrets
Line Composition 1,008,697 total lines
Code828,35382.1%
Blank101,00210.0%
Comments79,3427.9%
~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
3,854
535,598
64.7%
Markdown
1,992
129,822
15.7%
TypeScript
522
68,445
8.3%
Rust
120
64,989
7.8%
JSON
150
17,546
2.1%
CSS
112
4,332
0.5%
HTML
79
3,215
0.4%
YAML
27
2,582
0.3%
CoffeeScript
1
476
0.1%
+ 7 more
—
1,016
·

Tech Stack  (44 detected)

React 1340 Lodash 268 Node.js OS 109 Node.js File System 105 Node.js Path 93 Expo 88 Jest 52 Joi 52 Node.js Child Process 38 Chalk 31 Node.js Events 23 Webpack 21 Serde 19 React Native 12 Ring 10 Config (config-rs) 10 Node.js HTTP 9 Rand Crate 9 Express.js 9 Browser Promises 8 Cypress / Playwright 7 Zod 7 Redux 6 Testing Library 6 Browser Fetch API 5 Inquirer 4 Node.js Crypto 4 Electron 3 Puppeteer 3 Next.js (React Framework) 2 GraphQL.js 2 Rollup 2 Cheerio 1 Browser DOM API 1 Tailwind CSS 1 RxJS 1 esbuild 1 RustCrypto Crates 1 dotenv 1 Rust Standard Library 625 modules

03Notable Files

where complexity and size live

Most Complex

FileLinesCx
packages/react-devtools-shared/src/backend/fiber/renderer.js6,4871,220
packages/react-server/src/ReactFlightServer.js5,300908
packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js5,460830
packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js5,907823
compiler/packages/babel-plugin-react-compiler/src/HIR/BuildHIR.ts4,172799
compiler/packages/babel-plugin-react-compiler/src/Inference/InferMutationAliasingEffects.ts2,501713
packages/react-server/src/ReactFizzServer.js5,164687
packages/react-reconciler/src/ReactFiberCommitWork.js4,372685
packages/react-client/src/ReactFlightClient.js4,504683
packages/react-reconciler/src/ReactFiberWorkLoop.js4,204646

Largest

FileLinesCx
fixtures/attribute-behavior/AttributeTableSnapshot.md13,3920
fixtures/ssr2/package-lock.json12,8270
packages/react-dom/src/__tests__/ReactDOMFloat-test.js8,96150
packages/react-dom/src/__tests__/ReactDOMFizzServer-test.js8,555112
packages/eslint-plugin-react-hooks/__tests__/ESLintRuleExhaustiveDeps-test.js8,5395
compiler/crates/react_compiler_lowering/src/build_hir.rs6,655585
packages/react-devtools-shared/src/backend/fiber/renderer.js6,4871,220
packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js5,907823
packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js5,460830
scripts/bench/benchmarks/pe-class-components/benchmark.js5,400498

04Code Quality

style, correctness, and maintainability findings

By Severity & Category

Warning
1272
Info
14420
Error
28
Total
15,720
By Category
Modernization 5 accessibility 306 correctness 14665 maintainability 77 performance 545 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:256
Use textContent or DOM methods to prevent XSS vulnerabilities ×3
fixtures/dom/public/renderer.js:116 + 2 more
Similar to eval(); avoid due to security risks
fixtures/dom/public/renderer.js:142

05Secrets & Credentials

pattern-based scan for hardcoded secrets
Generic API Key
compiler/packages/react-mcp-server/src/utils/algolia.ts:14

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