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Alex Spinov
Alex Spinov

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Biome Has a Free API: One Tool to Lint and Format JavaScript, TypeScript, and JSON

#javascript #typescript #linting #tooling

Why Biome

Biome replaces ESLint AND Prettier in one tool — written in Rust, 10-100x faster. Linting and formatting with zero config, one dependency.

Install 

npm install --save-dev @biomejs/biome
npx @biomejs/biome init
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One Command 

# Lint + format everything
npx biome check --write .

# Format only
npx biome format --write .

# Lint only
npx biome lint .

# CI mode (no writes, just check)
npx biome ci .
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biome.json 

{
  "$schema": "https://biomejs.dev/schemas/1.8.0/schema.json",
  "organizeImports": { "enabled": true },
  "linter": {
    "enabled": true,
    "rules": {
      "recommended": true,
      "complexity": {
        "noExcessiveCognitiveComplexity": "warn"
      },
      "suspicious": {
        "noExplicitAny": "error"
      }
    }
  },
  "formatter": {
    "enabled": true,
    "indentStyle": "space",
    "indentWidth": 2,
    "lineWidth": 100
  }
}
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VS Code Extension

Install the Biome VS Code extension — format on save, inline lint errors, quick fixes.

Migration from ESLint + Prettier 

# Auto-migrate ESLint config
npx @biomejs/biome migrate eslint

# Auto-migrate Prettier config
npx @biomejs/biome migrate prettier
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Speed Comparison 

Project: 5,000 TypeScript files
ESLint + Prettier: 45 seconds
Biome:             0.8 seconds (56x faster)
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Key Features

  • All-in-one — linter + formatter + import sorter
  • Fast — written in Rust, 10-100x faster than ESLint
  • Zero config — works out of the box
  • 200+ lint rules — covers ESLint recommended + more
  • IDE support — VS Code, IntelliJ, Neovim
  • MIT license — free forever

Resources

Need to extract code quality metrics, lint configs, or project standards? Check out my Apify tools or email spinov001@gmail.com for custom solutions.

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