eslint

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Translated

ESLint JavaScript linter with plugins. Use for code quality.

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NPX Install

npx skill4agent add g1joshi/agent-skills eslint

Tags

Translated version includes tags in frontmatter
eslintflat-configcode-qualitytypescript-eslintjavascript-linting

SKILL.md Content

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ESLint

ESLint is the standard linter for JS/TS. v9 (2024/2025) moved to Flat Config (
eslint.config.js
), a major breaking change that simplifies configuration.

When to Use

  • Enforcing Rules: 
    no-unused-vars
    , 
    react-hooks/rules-of-hooks
    .
  • Code Quality: Catching bugs before they run.

Core Concepts

Flat Config (
eslint.config.js
)

An array of objects. No more 
extends
string hell.
js
export default [js.configs.recommended, { rules: { semi: "error" } }];

Plugins

NPM packages that add rules. 
eslint-plugin-react
.

Parsers

@typescript-eslint/parser
allows ESLint to understand TS.

Best Practices (2025)

Do:
  • Use Flat Config: Use the new format.
  • Use 
    typescript-eslint
    : The typed linting rules are powerful (e.g. 
    no-floating-promises
    ).
Don't:
  • Don't configure formatting rules: Disable all formatting rules (use Prettier or Biome for that). use 
    eslint-config-prettier
    .

References