eslint.config.mjs

import tseslint from "typescript-eslint";
import simpleImportSort from "eslint-plugin-simple-import-sort";
import tsParser from "@typescript-eslint/parser";
import eslint from "@eslint/js";

export default tseslint.config(
  { ignores: ["dist/*", "coverage/*", "node_modules/*"] },

  eslint.configs.recommended,
  tseslint.configs.strictTypeChecked,
  tseslint.configs.stylisticTypeChecked,

  {
    languageOptions: {
      parser: tsParser,
      ecmaVersion: "latest",
      sourceType: "module",

      // Each project's individual/local tsconfig.json defines the behavior
      // of the parser
      parserOptions: {
        project: ["./tsconfig.json"],
      },
    },
  },

  // -----------------------------
  // Enable these checks
  // -----------------------------
  {
    plugins: {
      "simple-import-sort": simpleImportSort,
    },

    rules: {
      eqeqeq: ["error", "always", { null: "ignore" }],
      "object-shorthand": "error",

      "@typescript-eslint/consistent-type-imports": "error",
      "@typescript-eslint/explicit-module-boundary-types": "error",
      "@typescript-eslint/no-explicit-any": "error",
      "@typescript-eslint/no-unnecessary-condition": ["error", { allowConstantLoopConditions: true }],
      "@typescript-eslint/restrict-template-expressions": ["error", { allowNumber: true }],
      "@typescript-eslint/no-unused-vars": [
        "warn",
        { args: "all", argsIgnorePattern: "^_.*", varsIgnorePattern: "^_.*" },
      ],
      "simple-import-sort/exports": "error",
      "simple-import-sort/imports": "error",

      // --------------------------------------------------------------
      // "The Code is the To-Do List"
      // https://www.executeprogram.com/blog/the-code-is-the-to-do-list
      // --------------------------------------------------------------
      "no-warning-comments": ["error", { terms: ["xxx"], location: "anywhere" }],
    },
  },

  // -------------------------------
  // Disable these checks
  // -------------------------------
  {
    rules: {
      //"@typescript-eslint/consistent-type-definitions": "off",
      //"@typescript-eslint/no-empty-function": "off",
      //"@typescript-eslint/no-inferrable-types": "off",
      "@typescript-eslint/no-non-null-assertion": "off",
      "@typescript-eslint/unified-signatures": "off",
      //"@typescript-eslint/use-unknown-in-catch-callback-variable": "off",
      //"no-constant-condition": "off",
    },
  },

  // Overrides for tests specifically
  {
    files: ["test/**"],

    // Relax ESLint a bit in tests
    rules: {
      "@typescript-eslint/no-confusing-void-expression": "off",
      //"@typescript-eslint/no-deprecated": "off",
      //"@typescript-eslint/no-explicit-any": "off",
      //"@typescript-eslint/no-unsafe-argument": "off",
      //"@typescript-eslint/no-unsafe-call": "off",
      //"@typescript-eslint/no-unsafe-member-access": "off",
      //"@typescript-eslint/only-throw-error": "off",
    },
  },
);