@api3/eslint-plugin-commons
v3.0.0
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> ESLint configurations used across API3 projects.
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eslint-plugin-commons
ESLint configurations used across API3 projects.
The modules consists of multiple ESLint configurations supporting wide variety of targets:
universal
- Linting rules for universal (both FE and BE) JS/TS code (with the emphasis on TS).react
- Linting rules for React code.next-js
- Linting rules for Next.js code.jest
- Linting rules for Jest tests. Note, that these rules are only applied for JS/TS files with*.test.*
extensions.
Getting started
- Create an
.eslintrc.js
configuration file in the repo root. - Extend the desired configuration(s).
- Specify the
parserOptions.project
option with the path to thetsconfig.json
file(s). - Install
eslint
(which is a peer dependency of this module) as dev dependencies.
For example:
module.exports = {
extends: ['plugin:@api3/eslint-plugin-commons/universal', 'plugin:@api3/eslint-plugin-commons/jest'],
parserOptions: {
// We focus primarily on TS and for that we need to specify the TS configs which is project specific. The following
// is a common monorepo setup (root config and a config for each package).
project: ['./tsconfig.json', './packages/*/tsconfig.json'],
},
};
Linting commands
We recommend using the following linting commands inside package.json
scripts:
{
"eslint:check": "eslint --report-unused-disable-directives --cache --ext js,ts,tsx,jsx . --max-warnings 0",
"eslint:fix": "pnpm run eslint:check --fix"
}
The --cache
parameter makes ESLint create a .eslintcache
file in the root of the project. This file should be put to
.gitignore
.
Rules
The configurations are a collection of various rulesets and the config is quite strict. In general there are rules that:
- Have a fixer (import ordering)
- Simplify code (combine two nested ifs)
- Make code more consistent (make
return void
pattern be split on two lines) - Fix outdated stuff (avoid
!
ts operator when not necessary) - Avoid vulnerabilities and errors (Number.parseInt without radix)
Tip: Some rules do have fixer with multiple variants of the fixes. You need to use the IDE to prompt the fixes and choose the one you want.
Overriding rules
To override a rule, you can use the rules
section key in your .eslintrc.js
file. For example:
{
rules: {
'check-file/folder-naming-convention': 'off', // Turns of the kebab-case convention for folder names.
'unicorn/filename-case': 'off' // Turns of the kebab-case convention for filenames.
'import/no-default-export': 'off', // Turns off the rule that disallows default exports.
'import/prefer-default-export': 'error' // Turns on the rule that prefers default exports.
}
}
For developers
This sections is intended for developers of this repo.
Release
- Run
pnpm version [major|minor|patch]
by choosing the appropriate version bump. - Push the changes to the
main
, either directly or via a pull request. - The CI will register a new version and handle the release process.