eslint.config.mjs

import globals from "globals"
import js from "@eslint/js"
import n from "eslint-plugin-n"
import stylistic from "@stylistic/eslint-plugin"

export default [
	// I have no clue why on earth it's not spelled out in the docs that `ignores` needs to be in
	// the first entry of the config, before anything else.
	// https://github.com/eslint/eslint/discussions/18304#discussioncomment-9069706
	{
		ignores: [
			"dist",
			"archive",
			// Ignoring for now.
			"examples",
		],
	},
	js.configs.recommended,
	n.configs["flat/recommended"],
	{
		ignores: ["node_modules"],
		name: "root config",
		plugins: {
			"@stylistic": stylistic,
			"n": n,
		},
		languageOptions: {
			ecmaVersion: 2022,
			globals: {
				...globals.nodeBuiltin,
				...globals.es2022,
			},
		},
		rules: {
			"accessor-pairs": "error",
			"@stylistic/array-bracket-spacing": [
				"error",
				"never"
			],
			"array-callback-return": "error",
			"arrow-body-style": "error",
			"@stylistic/arrow-parens": "error",
			"@stylistic/arrow-spacing": "error",
			"@stylistic/block-spacing": ["error", "always"],
			"@stylistic/brace-style": ["error", "1tbs"],
			"@stylistic/comma-dangle": ["error", "only-multiline"],
			"@stylistic/comma-spacing": ["error", {before: false, after: true}],
			"@stylistic/comma-style": ["error", "last"],
			"@stylistic/computed-property-spacing": ["error", "never"],
			"curly": ["error", "multi-line", "consistent"],
			"@stylistic/dot-location": ["error", "property"],
			"dot-notation": "error",
			"@stylistic/eol-last": "error",
			"eqeqeq": ["error", "always", {null: "ignore"}],
			"@stylistic/function-call-spacing": "error",
			"@stylistic/generator-star-spacing": "error",
			"n/handle-callback-err": "error",
			"id-match": ["error", "^_?(?:[A-Za-z$][\\w$]*|[$A-Z][$A-Z0-9]*(?:_[$A-Z0-9]+)*)$", {properties: false}],
			"@stylistic/indent": ["error", "tab", {outerIIFEBody: 0, SwitchCase: 1}],
			"@stylistic/implicit-arrow-linebreak": ["error", "beside"],
			"@stylistic/key-spacing": "error",
			"@stylistic/keyword-spacing": "error",
			"@stylistic/linebreak-style": ["error", "unix"],
			"@stylistic/lines-around-comment": ["error", {
				beforeBlockComment: true,
				allowBlockStart: true,
				allowBlockEnd: true,
				allowObjectStart: true,
				allowObjectEnd: true,
				allowArrayStart: true,
				allowArrayEnd: true,
				allowClassStart: true,
				allowClassEnd: true,
			}],
			"@stylistic/multiline-comment-style": "off",
			"@stylistic/new-parens": "error",
			"@stylistic/newline-per-chained-call": "error",
			"no-alert": "error",
			"no-array-constructor": "error",
			"no-bitwise": "error",
			"no-caller": "error",
			"@stylistic/no-confusing-arrow": "error",
			"no-div-regex": "error",
			"no-duplicate-imports": "error",
			"no-eval": "error",
			"no-extra-bind": "error",
			"no-extra-label": "error",
			"@stylistic/no-extra-semi": "error",
			"@stylistic/no-floating-decimal": "error",
			"no-implicit-coercion": "error",
			"no-implicit-globals": "error",
			"no-implied-eval": "error",
			"no-iterator": "error",
			"no-lone-blocks": "error",
			"n/no-mixed-requires": "error",
			"@stylistic/no-multi-spaces": "error",
			"no-multi-str": "error",
			"@stylistic/no-multiple-empty-lines": "error",
			"no-native-reassign": "error",
			"no-new": "error",
			"no-new-func": "error",
			"no-new-object": "error",
			"n/no-new-require": "error",
			"no-new-wrappers": "error",
			"no-octal-escape": "error",
			"n/no-process-exit": "error",
			"no-proto": "error",
			"no-redeclare": "error",
			"no-restricted-syntax": [
				"error",
				{selector: "ForInStatement", message: "Use `for (const key of Object.keys(object))` instead."}
			],
			"no-script-url": "error",
			"no-self-compare": "error",
			"no-sequences": "error",
			"no-shadow": "error",
			"no-throw-literal": "error",
			"@stylistic/no-trailing-spaces": ["error", {skipBlankLines: true}],
			"no-undef-init": "error",
			"no-unmodified-loop-condition": "error",
			"no-unneeded-ternary": "error",
			"no-unreachable-loop": "error",
			"no-unused-vars": ["error", {
				varsIgnorePattern: "^_",
				argsIgnorePattern: "^_",
				destructuredArrayIgnorePattern: "^_",
				reportUsedIgnorePattern: true,
			}],
			"no-useless-assignment": "error",
			"no-useless-call": "error",
			"no-useless-concat": "error",
			"no-useless-constructor": "error",
			"no-var": "error",
			"@stylistic/no-whitespace-before-property": "error",
			"object-curly-spacing": ["error", "never"],
			"object-shorthand": "off",
			"one-var": ["error", {initialized: "never"}],
			"one-var-declaration-per-line": "off",
			"operator-assignment": ["error", "always"],
			"@stylistic/operator-linebreak": "off",
			"@stylistic/padded-blocks": ["error", "never"],
			"prefer-const": "error",
			"n/prefer-node-protocol": "error",
			"@stylistic/quotes": ["error", "double", {avoidEscape: true}],
			"radix": ["error", "always"],
			"require-yield": "error",
			"@stylistic/semi": ["error", "never"],
			"sort-imports": ["error", {allowSeparatedGroups: true}],
			"@stylistic/space-before-blocks": ["error", "always"],
			"@stylistic/space-before-function-paren": ["error", "never"],
			"@stylistic/space-in-parens": ["error", "never"],
			"@stylistic/space-unary-ops": "error",
			"strict": ["error", "global"],
			"@stylistic/template-curly-spacing": "error",
			"@stylistic/wrap-regex": "error",
			"@stylistic/yield-star-spacing": "error",
		}
	}
]