Writing Guide 7 min read
Migrate ESLint 8 or Less to ESLint 9
A practical guide to moving from ESLint 8 to flat config in ESLint 9, with a cleaner setup for React, Next.js, and TypeScript projects.
In series: ESLint in Practice · Part 1
Blog series
ESLint in Practice
A focused track on config design, migrations, and the standards work that keeps code reviews sharper without slowing teams down.
3 posts Evergreen tooling notes for teams standardizing JavaScript and TypeScript work.
Tooling that earns its place
Linting only helps when it reduces ambiguity instead of creating more noise. This series collects the ESLint writing on the site into one track so migrations, reusable configs, and code-quality standards feel connected instead of scattered.
It is the best fit for engineers who want stronger defaults, cleaner pull requests, and tooling that scales with real teams.
Focus areas
What this series keeps coming back to.
Recurring themes that shape the articles in this track.
ESLint Developer Experience TypeScript
Posts
Articles in this series.
Read these in order if you want the clearest progression from foundations to deeper implementation decisions.
Part 1
Part 2
Writing Case Study 5 min read
Boosting Code Quality and Efficiency with My ESLint Configuration Library
Reusable ESLint library for React, Next.js, and TypeScript projects. Enforces code quality with flat config support and simplifies the move from ESLint 8 to 9.
In series: ESLint in Practice · Part 2
Part 3
Writing Case Study 8 min read
Why I Moved My ESLint Library to @santi020k/eslint-config-basic
Why I deprecated @santi020k/eslint-config-santi020k in favor of a composable monorepo with clearer packages, better docs, and stronger DX.
In series: ESLint in Practice · Part 3