ESLint Auto-Fix: Preview Changes Before You Commit
ESLint's --fix flag can correct style issues automatically, but you should preview and review changes before committing them.
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Eslint
Developer tools · #eslint
Fine‑Tune Linting on a Per‑File Basis with ESLint Overrides
ESLint overrides let you keep one config while relaxing rules for tests or legacy files. See a practical example, verification commands, and trade-offs for deciding when to use them.
javascriptESLint v9 Flat Config: Replace .eslintrc Without Breaking Your Lint
ESLint v9 ignores .eslintrc when eslint.config.js exists. Here's how to write flat config, verify per-file rules, and avoid silent rule loss.
Diagnosing ESLint no‑unused‑vars False Positives in JavaScript and TypeScript
Learn why ESLint's no-unused-vars rule can falsely flag variables used in destructuring, optional chaining, or TypeScript type‑only imports, and how to diagnose and fix it.
Fine‑Tune Your Linting: Using ESLint Overrides to Keep Test Files Clean
ESLint’s <code>overrides</code> let you apply different rule sets to file groups, like disabling <code>no-console</code> in test files while keeping it strict elsewhere. Learn how to configure, verify, and maintain overrides for clean, maintainable code.
Flat Config for ESLint 9: Stop Fighting .eslintrc Overrides in Monorepos
ESLint 9 flat config replaces .eslintrc cascade with an explicit eslint.config.js array. Learn the migration pattern for TypeScript, explicit imports, and the performance and memory trade-offs to plan for.
Lint test files differently with ESLint overrides
Stop linting test files like production code. Use ESLint overrides to apply different rules by file glob.
Architectural Boundary Enforcement with ESLint Custom Rules
Learn how to create a focused ESLint rule that uses the AST Visitor pattern to enforce architectural boundaries, with notes on configuration, testing, and limitations.
Creating a Custom ESLint Rule to Ban console.log in Production Code
Learn how to create a custom ESLint rule that flags and optionally removes console.log calls in production source files using the AST-based rule API.