eslint.config.mjs

import typescriptEslint from "@typescript-eslint/eslint-plugin";
import stylistic from "@stylistic/eslint-plugin";
import tsParser from "@typescript-eslint/parser";

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

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 [
	...compat.extends("plugin:@typescript-eslint/strict-type-checked"),
	{
		plugins: {
			"@typescript-eslint": typescriptEslint,
			"@stylistic": stylistic,
		},
		languageOptions: {
			parser: tsParser,
			ecmaVersion: 5,
			sourceType: "script",
			parserOptions: {
				parser: "@typescript-eslint/parser",
				project: [
					"./tsconfig.json"
				],
			},
		},
		rules: {
			"@stylistic/array-bracket-newline": ["error", "consistent"],
			"@stylistic/array-bracket-spacing": ["error"],
			"@stylistic/array-element-newline": ["error", "consistent"],
			"@stylistic/arrow-parens": ["error", "as-needed"],
			"@stylistic/arrow-spacing": ["error"],
			"@stylistic/block-spacing": ["error"],
			"@stylistic/brace-style": ["error"],
			"@stylistic/comma-dangle": ["error"],
			"@stylistic/comma-spacing": ["error"],
			"@stylistic/comma-style": ["error"],
			"@stylistic/computed-property-spacing": ["error"],
			"@stylistic/dot-location": ["error", "property"],
			"@stylistic/eol-last": ["error"],
			"@stylistic/function-call-argument-newline": ["error", "consistent"],
			"@stylistic/function-call-spacing": ["error"],
			"@stylistic/function-paren-newline": ["error"],
			"@stylistic/generator-star-spacing": ["error", "after"],
			"@stylistic/implicit-arrow-linebreak": ["error"],
			"@stylistic/indent": ["error", "tab"],
			"@stylistic/indent-binary-ops": ["error", "tab"],
			"@stylistic/key-spacing": ["error"],
			"@stylistic/keyword-spacing": ["error"],
			"@stylistic/linebreak-style": ["error"],
			"@stylistic/lines-around-comment": ["error"],
			"@stylistic/lines-between-class-members": ["error"],
			"@stylistic/max-len": ["error", {
				code: 80,
				tabWidth: 1,
			}],
			"@stylistic/max-statements-per-line": ["error"],
			"@stylistic/member-delimiter-style": ["error"],
			"@stylistic/multiline-ternary": ["error", "always-multiline"],
			"@stylistic/new-parens": ["error"],
			"@stylistic/newline-per-chained-call": ["error", {
				ignoreChainWithDepth: 3,
			}],
			"@stylistic/no-confusing-arrow": ["error", {
				allowParens: true,
			}],
			"@stylistic/no-extra-parens": ["error", "all", {
				enforceForArrowConditionals: false,
				nestedBinaryExpressions: false,
			}],
			"@stylistic/no-extra-semi": ["error"],
			"@stylistic/no-floating-decimal": ["error"],
			"@stylistic/no-mixed-operators": ["error"],
			"@stylistic/no-mixed-spaces-and-tabs": ["error"],
			"@stylistic/no-multi-spaces": ["error"],
			"@stylistic/no-multiple-empty-lines": ["error"],
			"@stylistic/no-tabs": ["error", {
				allowIndentationTabs: true,
			}],
			"@stylistic/no-trailing-spaces": ["error"],
			"@stylistic/no-whitespace-before-property": ["error"],
			"@stylistic/nonblock-statement-body-position": ["error"],
			"@stylistic/object-curly-newline": ["error"],
			"@stylistic/object-curly-spacing": ["error", "always"],
			"@stylistic/operator-linebreak": ["error"],
			"@stylistic/padded-blocks": ["error", "never"],
			"@stylistic/quote-props": ["error", "as-needed"],
			"@stylistic/quotes": ["error"],
			"@stylistic/rest-spread-spacing": ["error"],
			"@stylistic/semi": ["error"],
			"@stylistic/semi-spacing": ["error"],
			"@stylistic/semi-style": ["error"],
			"@stylistic/space-before-blocks": ["error"],
			"@stylistic/space-before-function-paren": ["error", {
				anonymous: "always",
				named: "never",
				asyncArrow: "always",
			}],
			"@stylistic/space-in-parens": ["error"],
			"@stylistic/space-infix-ops": ["error"],
			"@stylistic/space-unary-ops": ["error"],
			"@stylistic/spaced-comment": ["error"],
			"@stylistic/switch-colon-spacing": ["error"],
			"@stylistic/template-curly-spacing": ["error"],
			"@stylistic/template-tag-spacing": ["error"],
			"@stylistic/type-annotation-spacing": ["error"],
			"@stylistic/type-generic-spacing": ["error"],
			"@stylistic/type-named-tuple-spacing": ["error"],
			"@stylistic/wrap-iife": ["error"],
			"@stylistic/wrap-regex": ["error"],
			"@stylistic/yield-star-spacing": ["error"],
			"@typescript-eslint/restrict-template-expressions": ["error", {
				allowNumber: true,
				allowBoolean: true,
			}],
		},
	}
];