eslint.config.js

import globals from "globals";
import stylistic from "@stylistic/eslint-plugin";

export default [
	{
		languageOptions: {
			ecmaVersion: 2022,
			sourceType: "module",
			globals: {
				...globals.browser,
			},
		},
		plugins: {
			"@stylistic": stylistic,
		},
		rules: {
			/**
			 * ESLint rules: https://eslint.org/docs/latest/rules/
			 * Based off of: https://github.com/eslint/eslint/blob/v8.54.0/packages/js/src/configs/eslint-recommended.js
			 */
			// Enforce curly braces for all control statements
			// https://eslint.org/docs/latest/rules/curly
			curly: 1,

			// Require `super()` calls in constructors
			// https://eslint.org/docs/latest/rules/constructor-super
			"constructor-super": 1,

			// Enforce “for” loop update clause moving the counter in the right direction
			// https://eslint.org/docs/latest/rules/for-direction
			"for-direction": 1,

			// Enforce `return` statements in getters
			// https://eslint.org/docs/latest/rules/getter-return
			"getter-return": 1,

			// Disallow using an async function as a Promise executor
			// https://eslint.org/docs/latest/rules/no-async-promise-executor
			"no-async-promise-executor": 1,

			// Disallow `let`/const`/function`/`class` in `case`/`default` clauses
			// https://eslint.org/docs/latest/rules/no-case-declarations
			"no-case-declarations": 1,

			// Disallow reassigning class members
			// https://eslint.org/docs/latest/rules/no-class-assign
			"no-class-assign": 1,

			// Disallow comparing against -0
			// https://eslint.org/docs/latest/rules/no-compare-neg-zero
			"no-compare-neg-zero": 1,

			// Disallow reassigning `const` variables
			// https://eslint.org/docs/latest/rules/no-const-assign
			"no-const-assign": 1,

			// Disallow constant expressions in conditions
			// https://eslint.org/docs/latest/rules/no-constant-condition
			"no-constant-condition": 1,

			// Disallow control characters in regular expressions
			// https://eslint.org/docs/latest/rules/no-control-regex
			"no-control-regex": 1,

			// Disallow the use of `debugger`
			// https://eslint.org/docs/latest/rules/no-debugger
			"no-debugger": 1,

			// Disallow deleting variables
			// https://eslint.org/docs/latest/rules/no-delete-var
			"no-delete-var": 1,

			// Disallow duplicate arguments in `function` definitions
			// https://eslint.org/docs/latest/rules/no-dupe-args
			"no-dupe-args": 1,

			// Disallow duplicate class members
			// https://eslint.org/docs/latest/rules/no-dupe-class-members
			"no-dupe-class-members": 1,

			// Disallow duplicate conditions in if-else-if chains
			// https://eslint.org/docs/latest/rules/no-dupe-else-if
			"no-dupe-else-if": 1,

			// Disallow duplicate keys in object literals
			// https://eslint.org/docs/latest/rules/no-dupe-keys
			"no-dupe-keys": 1,

			// Disallow duplicate case labels
			// https://eslint.org/docs/latest/rules/no-duplicate-case
			"no-duplicate-case": 1,

			// Disallow empty character classes in regular expressions
			// https://eslint.org/docs/latest/rules/no-empty-character-class
			"no-empty-character-class": 1,

			// Disallow empty destructuring patterns
			// https://eslint.org/docs/latest/rules/no-empty-pattern
			"no-empty-pattern": 1,

			// Disallow reassigning exceptions in `catch` clauses
			// https://eslint.org/docs/latest/rules/no-ex-assign
			"no-ex-assign": 1,

			// Disallow unnecessary boolean casts
			// https://eslint.org/docs/latest/rules/no-extra-boolean-cast
			"no-extra-boolean-cast": 1,

			// Disallow fallthrough of `case` statements
			// unless marked with a comment that matches `/falls?\s?through/i` regex
			// https://eslint.org/docs/latest/rules/no-fallthrough
			"no-fallthrough": 1,

			// Disallow reassigning `function` declarations
			// https://eslint.org/docs/latest/rules/no-func-assign
			"no-func-assign": 1,

			// Disallow assignments to native objects or read-only global variables
			// https://eslint.org/docs/latest/rules/no-global-assign
			"no-global-assign": 1,

			// Disallow assigning to imported bindings
			// https://eslint.org/docs/latest/rules/no-import-assign
			"no-import-assign": 1,

			// Disallow invalid regular expression strings in `RegExp` constructors
			// https://eslint.org/docs/latest/rules/no-invalid-regexp
			"no-invalid-regexp": 1,

			// Disallow whitespace that is not `tab` or `space` except in string literals
			// https://eslint.org/docs/latest/rules/no-irregular-whitespace
			"no-irregular-whitespace": 1,

			// Disallow characters which are made with multiple code points in character class syntax
			// https://eslint.org/docs/latest/rules/no-misleading-character-class
			"no-misleading-character-class": 1,

			// Disallow `new` operators with the `Symbol` object
			// https://eslint.org/docs/latest/rules/no-new-symbol
			"no-new-symbol": 1,

			// Disallow `\8` and `\9` escape sequences in string literals
			// https://eslint.org/docs/latest/rules/no-nonoctal-decimal-escape
			"no-nonoctal-decimal-escape": 1,

			// Disallow calling global object properties as functions
			// https://eslint.org/docs/latest/rules/no-obj-calls
			"no-obj-calls": 1,

			// Disallow octal literals
			// https://eslint.org/docs/latest/rules/no-octal
			"no-octal": 1,

			// Disallow calling some `Object.prototype` methods directly on objects
			// https://eslint.org/docs/latest/rules/no-prototype-builtins
			"no-prototype-builtins": 1,

			// Disallow multiple spaces in regular expressions
			// https://eslint.org/docs/latest/rules/no-regex-spaces
			"no-regex-spaces": 1,

			// Disallow assignments where both sides are exactly the same
			// https://eslint.org/docs/latest/rules/no-self-assign
			"no-self-assign": 1,

			// Disallow identifiers from shadowing restricted names
			// https://eslint.org/docs/latest/rules/no-shadow-restricted-names
			"no-shadow-restricted-names": 1,

			// Disallow `this`/`super` before calling `super()` in constructors
			// https://eslint.org/docs/latest/rules/no-this-before-super
			"no-this-before-super": 1,

			// Disallow the use of undeclared variables unless mentioned in `/*global */` comments
			// https://eslint.org/docs/latest/rules/no-undef
			// TODO: At-risk; subject to change.
			"no-undef": 1,

			// Disallow confusing multiline expressions
			// https://eslint.org/docs/latest/rules/no-unexpected-multiline
			// TODO: At-risk; subject to change.
			"no-unexpected-multiline": 1,

			// Disallow unreachable code after `return`, `throw`, `continue`, and `break` statements
			// https://eslint.org/docs/latest/rules/no-unreachable
			"no-unreachable": 1,

			// Disallow control flow statements in `finally` blocks
			// https://eslint.org/docs/latest/rules/no-unsafe-finally
			"no-unsafe-finally": 1,

			// Disallow negating the left operand of relational operators
			// https://eslint.org/docs/latest/rules/no-unsafe-negation
			"no-unsafe-negation": 1,

			// Disallow use of optional chaining in contexts where the `undefined` value is not allowed
			// https://eslint.org/docs/latest/rules/no-unsafe-optional-chaining
			"no-unsafe-optional-chaining": 1,

			// Disallow unused labels
			// https://eslint.org/docs/latest/rules/no-unused-labels
			"no-unused-labels": 1,

			// Disallow useless backreferences in regular expressions
			// https://eslint.org/docs/latest/rules/no-useless-backreference
			"no-useless-backreference": 1,

			// Disallow unnecessary calls to `.call()` and `.apply()`
			// https://eslint.org/docs/latest/rules/no-useless-call
			"no-useless-call": 1,

			// Disallow unnecessary `catch` clauses
			// https://eslint.org/docs/latest/rules/no-useless-catch
			"no-useless-catch": 1,

			// Disallow unnecessary escape characters
			// https://eslint.org/docs/latest/rules/no-useless-escape
			"no-useless-escape": 1,

			// Disallow `with` statements
			// https://eslint.org/docs/latest/rules/no-with
			"no-with": 1,

			// Require generator functions to contain `yield`
			// https://eslint.org/docs/latest/rules/require-yield
			"require-yield": 1,

			// Require calls to `isNaN()` when checking for `NaN`
			// https://eslint.org/docs/latest/rules/use-isnan
			"use-isnan": 1,

			// Enforce comparing `typeof` expressions against valid strings
			// https://eslint.org/docs/latest/rules/valid-typeof
			"valid-typeof": 1,

			/**
			 * ESLint Stylistic rules: https://eslint.style/packages/default#rules
			 */
			// Enforce a space before and after `=>` in arrow functions
			// https://eslint.style/rules/default/arrow-spacing
			"@stylistic/arrow-spacing": 1,

			// Enforce consistent brace style for blocks
			// https://eslint.style/rules/default/brace-style
			"@stylistic/brace-style": [1, "stroustrup"],

			// Enforce trailing commas unless closing `]` or `}` is on the same line
			// https://eslint.style/rules/default/comma-dangle
			"@stylistic/comma-dangle": [1, "always-multiline"],

			// Enforce no space before and one or more spaces after a comma
			// https://eslint.style/rules/default/comma-spacing
			"@stylistic/comma-spacing": 1,

			// Require newline at the end of files
			// https://eslint.style/rules/default/eol-last
			"@stylistic/eol-last": 1,

			// Enforce consistent indentation
			// https://eslint.style/rules/default/indent
			"@stylistic/indent": [1, "tab", { SwitchCase: 1, outerIIFEBody: 0 }],

			// Enforce consistent spacing before and after keywords
			// https://eslint.style/rules/default/keyword-spacing
			"@stylistic/keyword-spacing": 1,

			// Disallow unnecessary semicolons
			// https://eslint.style/rules/default/no-extra-semi
			"@stylistic/no-extra-semi": 1,

			// Disallow mixed spaces and tabs for indentation
			// https://eslint.style/rules/default/no-mixed-spaces-and-tabs
			"@stylistic/no-mixed-spaces-and-tabs": [1, "smart-tabs"],

			// Disallow trailing whitespace at the end of lines
			// https://eslint.style/rules/default/no-trailing-spaces
			"@stylistic/no-trailing-spaces": 1,

			// Enforce the consistent use of double quotes
			// https://eslint.style/rules/default/quotes
			"@stylistic/quotes": [
				1,
				"double",
				{ avoidEscape: true, allowTemplateLiterals: true },
			],

			// Require semicolons instead of ASI
			// https://eslint.style/rules/default/semi
			"@stylistic/semi": 1,

			// Enforce at least one space before blocks
			// https://eslint.style/rules/default/space-before-blocks
			"@stylistic/space-before-blocks": 1,

			// Enforce a space before `function` definition opening parenthesis
			// https://eslint.style/rules/default/space-before-function-paren
			"@stylistic/space-before-function-paren": 1,

			// Require spaces around infix operators (e.g. `+`, `=`, `?`, `:`)
			// https://eslint.style/rules/default/space-infix-ops
			"@stylistic/space-infix-ops": 1,

			// Enforce a space after unary word operators (`new`, `delete`, `typeof`, `void`, `yield`)
			// https://eslint.style/rules/default/space-unary-ops
			"@stylistic/space-unary-ops": 1,

			// Enforce whitespace after the `//` or `/*` in a comment
			// https://eslint.style/rules/default/spaced-comment
			"@stylistic/spaced-comment": [
				1,
				"always",
				{ block: { exceptions: ["*"] } },
			],
		},
	},
];