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eslint.config.js
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import eslint from '@eslint/js'
import pluginVitest from '@vitest/eslint-plugin'
import configPrettier from 'eslint-config-prettier'
import pluginJsdoc from 'eslint-plugin-jsdoc'
import pluginUnicorn from 'eslint-plugin-unicorn'
import pluginUnusedImports from 'eslint-plugin-unused-imports'
import typescriptEslint from 'typescript-eslint'
import globals from 'globals'
import pluginPreferArrowFunction from 'eslint-plugin-prefer-arrow-functions'
const GLOB_ALL = ['**/*.{js,ts,tsx,mjs}']
const GLOB_JS = ['**/*.{js,cjs,mjs}']
const GLOB_TS = ['**/*.{ts,tsx}']
const unicorn = typescriptEslint.config(
{
files: GLOB_ALL,
...pluginUnicorn.configs['flat/recommended'],
},
{
rules: {
'unicorn/no-nested-ternary': 'off',
'unicorn/no-null': 'off',
'unicorn/number-literal-case': 'off',
'unicorn/prefer-event-target': 'off',
'unicorn/prefer-logical-operator-over-ternary': 'off',
'unicorn/prevent-abbreviations': 'off',
},
}
)
const javascript = typescriptEslint.config(
{
files: GLOB_ALL,
languageOptions: {
globals: {
...globals.nodeBuiltin,
},
},
name: 'javascript',
rules: eslint.configs.recommended.rules,
},
{
files: GLOB_ALL,
name: 'prefer-arrow-function',
plugins: {
'prefer-arrow-functions': pluginPreferArrowFunction,
},
rules: {
'prefer-arrow-functions/prefer-arrow-functions': [
'error',
{ disallowPrototype: true, singleReturnOnly: false },
],
},
}
)
const test = typescriptEslint.config({
files: ['**/*.test.ts'],
name: 'vitest',
plugins: { vitest: pluginVitest },
rules: {
...pluginVitest.configs.recommended.rules,
'@typescript-eslint/no-confusing-void-expression': 'off',
'@typescript-eslint/no-unnecessary-type-parameters': 'off',
'@typescript-eslint/no-unsafe-assignment': 'off',
// https://typescript-eslint.io/rules/unbound-method/
'@typescript-eslint/unbound-method': 'off',
},
})
const typescript = typescriptEslint.config(
...typescriptEslint.configs.strictTypeChecked,
...typescriptEslint.configs.stylisticTypeChecked,
{
rules: {
'@typescript-eslint/no-unsafe-assignment': 'off',
'@typescript-eslint/consistent-type-imports': [
'error',
{
disallowTypeAnnotations: false,
},
],
// Enable when codebase is ready
'@typescript-eslint/no-explicit-any': 'warn',
// https://typescript-eslint.io/rules/no-misused-promises/#checksvoidreturn
'@typescript-eslint/no-misused-promises': [
'error',
{
checksVoidReturn: false,
},
],
// Warn until we fix discuss about it
'@typescript-eslint/no-unnecessary-type-parameters': 'warn',
'@typescript-eslint/restrict-template-expressions': [
'error',
{
allowBoolean: true,
allowNumber: true,
},
],
},
}
)
const jsDoc = typescriptEslint.config(
{
...pluginJsdoc.configs['flat/contents-typescript-error'],
files: GLOB_TS,
},
{
...pluginJsdoc.configs['flat/logical-typescript-error'],
files: GLOB_TS,
},
{
...pluginJsdoc.configs['flat/stylistic-typescript-error'],
files: GLOB_TS,
},
{
...pluginJsdoc.configs['flat/recommended-error'],
files: GLOB_JS,
},
{
rules: {
'jsdoc/lines-before-block': 'off',
'jsdoc/require-hyphen-before-param-description': 'error',
'jsdoc/require-jsdoc': 'off',
},
}
)
const ignored = typescriptEslint.config({
ignores: [
'**/dist',
'**/build',
'**/node_modules',
'**/coverage',
'**/reports',
'**/*.cjs',
'**/tree.gen.ts',
'**/.astro',
],
name: 'ignored',
})
// https://typescript-eslint.io/users/configs#disable-type-checked
// Must be after typescript eslint config
const disabledTypecheck = typescriptEslint.config({
files: ['**/*.{js,cjs,mjs}'],
...typescriptEslint.configs.disableTypeChecked,
})
const typescriptParser = {
languageOptions: {
parserOptions: {
// https://typescript-eslint.io/blog/announcing-typescript-eslint-v8-beta#project-service
// For faster linting
projectService: {
allowDefaultProject: ['*.js'],
},
},
},
}
const unusedImports = typescriptEslint.config({
plugins: {
'unused-imports': pluginUnusedImports,
},
rules: {
'@typescript-eslint/no-unused-vars': 'off',
'unused-imports/no-unused-imports': 'error',
'unused-imports/no-unused-vars': [
'warn',
{
args: 'after-used',
argsIgnorePattern: '^_',
vars: 'all',
varsIgnorePattern: '^_',
},
],
},
})
export default typescriptEslint.config(
...javascript,
...typescript,
...unicorn,
...test,
...ignored,
...unusedImports,
...jsDoc,
typescriptParser,
configPrettier,
...disabledTypecheck
)