import js from '@eslint/js';
import typescript from '@typescript-eslint/eslint-plugin';
import typescriptParser from '@typescript-eslint/parser';
import functional from 'eslint-plugin-functional';
import unicorn from 'eslint-plugin-unicorn';
import eslintComments from 'eslint-plugin-eslint-comments';
export default [
js.configs.recommended,
{
files: ['**/*.ts'],
languageOptions: {
parser: typescriptParser,
parserOptions: {
ecmaVersion: 'latest',
sourceType: 'module',
project: './tsconfig.json',
},
globals: {
console: 'readonly',
process: 'readonly',
Buffer: 'readonly',
__dirname: 'readonly',
__filename: 'readonly',
setTimeout: 'readonly',
clearTimeout: 'readonly',
setInterval: 'readonly',
clearInterval: 'readonly',
},
},
plugins: {
'@typescript-eslint': typescript,
'functional': functional,
'unicorn': unicorn,
'eslint-comments': eslintComments,
},
rules: {
// TypeScript strict rules - no any types allowed
'@typescript-eslint/no-explicit-any': 'error',
'@typescript-eslint/no-unsafe-assignment': 'error',
'@typescript-eslint/no-unsafe-member-access': 'error',
'@typescript-eslint/no-unsafe-call': 'error',
'@typescript-eslint/no-unsafe-return': 'error',
'@typescript-eslint/no-unsafe-argument': 'error',
// No type assertions allowed
'@typescript-eslint/consistent-type-assertions': ['error', {
assertionStyle: 'never',
}],
// Additional strict type rules
'@typescript-eslint/no-non-null-assertion': 'error',
'@typescript-eslint/strict-boolean-expressions': 'error',
'@typescript-eslint/explicit-function-return-type': 'error',
'@typescript-eslint/no-floating-promises': 'error',
'@typescript-eslint/await-thenable': 'error',
'@typescript-eslint/no-misused-promises': 'error',
'@typescript-eslint/require-await': 'error',
// General code quality rules
'no-console': 'warn',
'no-debugger': 'error',
'no-alert': 'error',
'prefer-const': 'error',
'no-var': 'error',
'eqeqeq': ['error', 'always'],
'no-unused-expressions': 'error',
'no-unused-vars': 'off', // TypeScript's noUnusedLocals and noUnusedParameters handle this
'no-shadow': 'off',
'@typescript-eslint/no-shadow': 'error',
'no-fallthrough': 'off', // Allow switch case fallthrough
// Additional rules for exhaustive switches
'@typescript-eslint/switch-exhaustiveness-check': 'error',
'unicorn/prefer-switch': 'error',
'no-restricted-syntax': [
'error',
{
selector: 'TSTypePredicate',
message: 'Type predicates are not allowed because of the unsoundness. Rethink your type design.',
},
],
// Ban eslint-disable comments
'eslint-comments/no-use': ['error', { allow: [] }],
},
},
{
files: ['**/*.ts'],
ignores: ['**/*.test.ts'],
rules: {
'functional/no-let': 'error',
},
},
{
ignores: ['node_modules/', 'dist/', 'build/', '*.js', '!eslint.config.js', 'vite.config.ts'],
},
];
