eslint.config.mjs

import path from "node:path";
import { fileURLToPath } from "node:url";

import { fixupConfigRules, fixupPluginRules } from "@eslint/compat";
import typescriptEslintEslintPlugin from "@typescript-eslint/eslint-plugin";
import tsdoc from "eslint-plugin-tsdoc";
import tsParser from "@typescript-eslint/parser";
import js from "@eslint/js";
import { FlatCompat } from "@eslint/eslintrc";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const compat = new FlatCompat({
    baseDirectory: __dirname,
    recommendedConfig: js.configs.recommended,
    allConfig: js.configs.all
});

export default [{
    ignores: ["**/*.js", "test/deno*", "test/bun*"],
}, ...fixupConfigRules(compat.extends(
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:import/recommended",
    "plugin:import/typescript",
    "prettier",
)), {
    plugins: {
        "@typescript-eslint": fixupPluginRules(typescriptEslintEslintPlugin),
        tsdoc,
    },

    languageOptions: {
        parser: tsParser,
        ecmaVersion: 5,
        sourceType: "script",

        parserOptions: {
            project: "./tsconfig.json",
        },
    },

    settings: {},

    rules: {
        "no-constant-condition": ["warn", {
            checkLoops: false,
        }],

        "no-useless-escape": "warn",
        "no-console": "warn",
        "no-var": "warn",
        "no-return-await": "warn",
        "prefer-const": "warn",
        "guard-for-in": "warn",
        curly: "warn",
        "no-param-reassign": "warn",
        "prefer-spread": "warn",
        "import/no-unresolved": "off",
        "import/no-cycle": "error",
        "import/no-default-export": "warn",
        "tsdoc/syntax": "warn",
        "@typescript-eslint/await-thenable": "warn",

        "@typescript-eslint/array-type": ["warn", {
            default: "generic",
        }],

        "@typescript-eslint/naming-convention": ["warn", {
            selector: "default",
            format: ["camelCase", "UPPER_CASE", "PascalCase"],
            leadingUnderscore: "allow",
        }, {
            selector: "typeLike",
            format: ["PascalCase"],
            leadingUnderscore: "allow",
        }],

        "@typescript-eslint/restrict-plus-operands": "warn",
        //"@typescript-eslint/no-throw-literal": "warn",
        "@typescript-eslint/unbound-method": "warn",
        "@typescript-eslint/explicit-module-boundary-types": "warn",
        //"@typescript-eslint/no-extra-semi": "warn",
        "@typescript-eslint/no-extra-non-null-assertion": "warn",

        "@typescript-eslint/no-unused-vars": ["warn", {
            argsIgnorePattern: "^_",
        }],

        "@typescript-eslint/no-use-before-define": "warn",
        "@typescript-eslint/no-for-in-array": "warn",
        "@typescript-eslint/no-unsafe-argument": "warn",
        "@typescript-eslint/no-unsafe-call": "warn",

        "@typescript-eslint/no-unnecessary-condition": ["warn", {
            allowConstantLoopConditions: true,
        }],

        "@typescript-eslint/no-unnecessary-type-constraint": "warn",
        "@typescript-eslint/no-implied-eval": "warn",
        "@typescript-eslint/no-non-null-asserted-optional-chain": "warn",
        "@typescript-eslint/no-invalid-void-type": "warn",
        "@typescript-eslint/no-loss-of-precision": "warn",
        "@typescript-eslint/no-confusing-void-expression": "warn",
        "@typescript-eslint/no-redundant-type-constituents": "warn",
        "@typescript-eslint/prefer-for-of": "warn",
        "@typescript-eslint/prefer-includes": "warn",
        "@typescript-eslint/prefer-string-starts-ends-with": "warn",
        "@typescript-eslint/prefer-readonly": "warn",
        "@typescript-eslint/prefer-regexp-exec": "warn",
        "@typescript-eslint/prefer-nullish-coalescing": "warn",
        "@typescript-eslint/prefer-optional-chain": "warn",
        "@typescript-eslint/prefer-ts-expect-error": "warn",
        "@typescript-eslint/indent": "off",
        "@typescript-eslint/no-explicit-any": "off",
        "@typescript-eslint/no-empty-interface": "off",
        "@typescript-eslint/no-empty-function": "off",
        "@typescript-eslint/no-var-requires": "off",
        "@typescript-eslint/no-non-null-assertion": "off",
        "@typescript-eslint/ban-ts-comment": "off",
    },
}];