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Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.


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Compares ESLint configs




Compare ESLint configs

npm version npm downloads js-semistandard-style ES Module Ready Badge Types in JS


npm install -g compare-eslint-configs
compare-eslint-configs .eslintrc new.eslintrc

Or simply:

npx compare-eslint-configs .eslintrc new.eslintrc


CLI output

npx compare-eslint-configs new.eslintrc -t cli.js

CLI output

Markdown output

npx compare-eslint-configs new.eslintrc -t cli.js -m

Only active in some:

Mixed severities:

Mixed configs where otherwise okay:

  • no-console
    • new.eslintrc:


compare-eslint <eslint config files, separated by spaces>

If a single config file is given, then it will be assumed to be compared with .eslintrc.

More than two config files can be compafred at once.


  • -r / --group-rules – when set the comparison output will group by rules rather than config
  • -t <file> / --target-file <file> – defaults to index.js – the file for which the config will be compared. Especially important when there's eg. different configs for .js and .ts files. Then point this to the one you want to do a comparison on.

See also