@byloth/eslint-config-typescript/index.mjs

A collection of some common sense linting rules for TypeScript projects. ✔

import eslintJs from "@byloth/eslint-config";
import eslintTs from "@typescript-eslint/eslint-plugin";
import eslintImport from "eslint-plugin-import";

const DYNAMIC_LEVEL = (process.env.NODE_ENV === "production") ? "error" : "warn";

const flatStylisticRules = eslintTs.configs["flat/stylistic"]
  .find(({ name }) => (name === "typescript-eslint/stylistic"));

const tsParser = eslintTs.configs["flat/strict"]
  .find(({ name }) => (name === "typescript-eslint/base")).languageOptions.parser;

export default [...eslintJs, ...eslintTs.configs["flat/strict"], flatStylisticRules, {
  plugins: { import: eslintImport },
  rules: {
    "@typescript-eslint/ban-ts-comment": DYNAMIC_LEVEL,
    "@typescript-eslint/consistent-type-imports": "error",
    "@typescript-eslint/no-import-type-side-effects": "error",
    "@typescript-eslint/no-invalid-void-type": "off",
    "@typescript-eslint/no-non-null-assertion": "off",
    "@typescript-eslint/no-shadow": DYNAMIC_LEVEL,
    "@typescript-eslint/no-unused-vars": [DYNAMIC_LEVEL, {
      args: "none",
      ignoreRestSiblings: true,
      varsIgnorePattern: "^_"
    }],
    "@typescript-eslint/no-useless-constructor": "error",
    "@typescript-eslint/unified-signatures": "off",

    "import/consistent-type-specifier-style": ["error", "prefer-top-level"]
  }
}, {
  files: ["**/*.cjs", "**/*.js", "**/*.mjs"],
  rules: {
    "@typescript-eslint/explicit-module-boundary-types": "off",
    "@typescript-eslint/no-unused-vars": "off",
    "@typescript-eslint/no-var-requires": "off"
  }
}, {
  files: ["**/.babelrc"],
  rules: { "@typescript-eslint/no-var-requires": "off" }
}, {
  files: ["**/*.ts", "**/*.mts"],
  rules: {
    "no-dupe-class-members": "off",
    "no-redeclare": "off",
    "no-shadow": "off",
    "no-useless-constructor": "off",
    "no-unused-vars": "off"
  }
}, {
  files: ["**/*.vue"],
  languageOptions: {
    parserOptions: { parser: tsParser }
  }
}, {
  files: ["**/*.config.ts", "**/*.config.mts"],
  rules: {
    "@stylistic/indent": ["error", 2, { SwitchCase: 1 }],
    "@stylistic/indent-binary-ops": ["error", 2]
  }
}, {
  files: ["**/*.d.ts"],
  rules: {
    "@typescript-eslint/no-explicit-any": "off",
    "@typescript-eslint/no-restricted-types": "off",
    "@typescript-eslint/no-unused-vars": "off"
  }
}, {
  files: ["**/*.json"],
  rules: { "@typescript-eslint/no-unused-expressions": "off" }
}];