82 lines
3.1 KiB
JavaScript
82 lines
3.1 KiB
JavaScript
import js from '@eslint/js';
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import prettier from 'eslint-config-prettier';
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import globals from 'globals';
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import tseslint from 'typescript-eslint';
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/**
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* Formatting is Prettier's job – `eslint-config-prettier` switches every stylistic rule off,
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* so a rule here always means "this is a mistake", never "this looks different".
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*/
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export default tseslint.config(
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{ ignores: ['dist/**', 'data/**', 'node_modules/**', 'index.html'] },
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// Type-aware linting for everything the tsconfig covers (src, tests, vite.config.ts).
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{
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files: ['src/**/*.ts', 'tests/**/*.ts', 'vite.config.ts'],
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extends: [js.configs.recommended, ...tseslint.configs.recommendedTypeChecked],
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languageOptions: {
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parserOptions: { projectService: true, tsconfigRootDir: import.meta.dirname },
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globals: globals.browser,
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},
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rules: {
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// The duplicate `import` statements the last refactoring round had to find by hand.
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'no-duplicate-imports': 'error',
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// `tsc` already reports unused locals; keep ESLint quiet about the same thing.
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'@typescript-eslint/no-unused-vars': 'off',
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// Off by design: the codebase builds objects from closures (`createFieldRow` returns
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// `{ setValue }`, test fixtures return `{ sceneOf, object }`). Those have no `this`,
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// but the rule cannot tell them from class methods and fired ~50 times on them.
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'@typescript-eslint/unbound-method': 'off',
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// A `?? []` on something that is never nullish hides that the type says otherwise.
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'@typescript-eslint/no-unnecessary-condition': 'error',
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'@typescript-eslint/no-unnecessary-type-assertion': 'error',
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'@typescript-eslint/consistent-type-imports': ['error', { fixStyle: 'inline-type-imports' }],
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'@typescript-eslint/no-import-type-side-effects': 'error',
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// Async work that nobody awaits silently swallows its rejection.
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'@typescript-eslint/no-floating-promises': 'error',
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'@typescript-eslint/no-misused-promises': ['error', { checksVoidReturn: false }],
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eqeqeq: ['error', 'always', { null: 'ignore' }],
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'no-console': ['error', { allow: ['warn', 'error'] }],
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'prefer-const': 'error',
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'object-shorthand': ['error', 'properties'],
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},
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},
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// Node scripts: plain JavaScript, no type information available.
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{
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files: ['tools/**/*.mjs'],
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extends: [js.configs.recommended],
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languageOptions: {
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ecmaVersion: 2023,
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sourceType: 'module',
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globals: globals.node,
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},
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rules: {
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'no-duplicate-imports': 'error',
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eqeqeq: ['error', 'always', { null: 'ignore' }],
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'prefer-const': 'error',
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},
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},
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// Editor plugins: browser modules that get everything through `api`, so they import nothing.
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{
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files: ['plugins/**/*.js'],
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extends: [js.configs.recommended],
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languageOptions: {
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ecmaVersion: 2023,
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sourceType: 'module',
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globals: globals.browser,
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},
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rules: {
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'no-restricted-syntax': [
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'error',
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{ selector: 'ImportDeclaration', message: 'A plugin gets everything through `api`.' },
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],
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eqeqeq: ['error', 'always', { null: 'ignore' }],
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'prefer-const': 'error',
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},
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},
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prettier,
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);
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