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facebook/react

611 files 14 languages 125,673 total lines @b685b40 analysed just now
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01Overview

react · 104,823 lines of actual code
611
Files
104,823
Code lines
8,697
Comments
14
Languages
7,810
Complexity
0
Secrets
Line Composition 125,673 total lines
Code104,82383.4%
Blank12,1539.7%
Comments8,6976.9%
~99%
tokens saved
Reading facebook/react via an LLM
~733k 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
401
72,382
69.1%
Rust
30
12,040
11.5%
Markdown
50
8,671
8.3%
TypeScript
46
8,597
8.2%
JSON
25
1,508
1.4%
CoffeeScript
1
476
0.5%
Shell
14
204
0.2%
CSS
3
174
0.2%
Plain Text
13
154
0.1%
+ 5 more
—
295
·

Tech Stack  (29 detected)

React 96 Node.js File System 61 Node.js Path 38 Joi 37 Lodash 29 Node.js Child Process 23 Expo 19 Chalk 18 Node.js OS 17 Jest 16 Serde 11 Browser Promises 8 Cypress / Playwright 5 Inquirer 4 Rand Crate 3 Webpack 3 Node.js HTTP 2 Next.js (React Framework) 2 React Native 2 Rollup 2 Config (config-rs) 1 Puppeteer 1 Tailwind CSS 1 Browser Fetch API 1 Node.js Crypto 1 Node.js Events 1 Rust Standard Library 183 modules

03Notable Files

where complexity and size live

Most Complex

FileLinesCx
scripts/bench/benchmarks/pe-class-components/benchmark.js5,400498
scripts/bench/benchmarks/pe-functional-components/benchmark.js4,994498
scripts/bench/benchmarks/pe-no-components/benchmark.js4,758498
packages/react-devtools-shared/src/devtools/store.js2,053294
compiler/crates/react_compiler_validation/src/validate_exhaustive_dependencies.rs1,593244
compiler/crates/react_compiler_validation/src/validate_no_derived_computations_in_effects.rs1,264240
compiler/crates/react_compiler_ast/src/visitor.rs1,369228
packages/react-reconciler/src/ReactFiberCommitEffects.js951165
compiler/crates/react_compiler_validation/src/validate_no_ref_access_in_render.rs1,138162
compiler/crates/react_compiler_ast/tests/scope_resolution.rs1,049158

Largest

FileLinesCx
scripts/bench/benchmarks/pe-class-components/benchmark.js5,400498
scripts/bench/benchmarks/pe-functional-components/benchmark.js4,994498
scripts/bench/benchmarks/pe-no-components/benchmark.js4,758498
flow-typed/environments/node.js3,7450
flow-typed/environments/dom.js3,1500
flow-typed/environments/bom.js2,3150
packages/react-devtools-shared/src/devtools/store.js2,053294
CHANGELOG.md2,0120
packages/react/src/__tests__/ReactProfiler-test.internal.js1,76223
compiler/crates/react_compiler_validation/src/validate_exhaustive_dependencies.rs1,593244

04Code Quality

style, correctness, and maintainability findings

By Severity & Category

Warning
228
Info
2306
Error
1
Total
2,535
By Category
accessibility 10 correctness 2401 maintainability 12 performance 91 safety 1 security 20

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
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_ast/src/literals.rs:10 + 1 more

05Secrets & Credentials

pattern-based scan for hardcoded secrets
✓   No hardcoded credentials or secret patterns detected. Pattern-based scan only — does not catch logic-level vulnerabilities.

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