diedeadcode

Conservative dead code detection for TypeScript and JavaScript.

ddd finds unused exports, unreachable functions, and dead code in your codebase with confidence scoring to minimize false positives.

Installation

``bash
npm install -D diedeadcode
`

Or run directly with npx:

`bash
npx diedeadcode .
`

Quick Start

`bash


Analyze current directory

ddd .

Analyze with verbose output

ddd . --verbose

Initialize config file

ddd init

Output as JSON

ddd analyze . --format json

Check mode (exit code 1 if dead code found)

ddd analyze . --check
`

Features

- Fast - Built on oxc for blazing-fast parsing
- Conservative - Confidence scoring reduces false positives
- Transitive analysis - Detects code that's only called by other dead code
- Framework-aware - Understands Next.js, Express, Jest, Vitest patterns
- Configurable - Ignore patterns, entry points, and more

Configuration

Run ddd init to generate a ddd.toml in your project root:

`toml


Files to analyze

include = ["/.ts", "/.tsx", "/.js", "/.jsx"]
exclude = ["/node_modules/", "/dist/", "*/.test.*"]

Entry points

[entry]
files = ["src/index.ts", "src/main.ts"]
patterns = ["/pages//*.tsx"]
autoDetect = true

Output settings

[output]
format = "table"
minConfidence = "high"
showChains = true
`

Alternative Installation Methods

$3

`bash
cargo install diedeadcode
`

$3

`bash
brew install dean0x/tap/diedeadcode
``

Documentation

See the GitHub repository for full documentation.

License

MIT