eslint.config.mjs

import globals from 'globals';
import pluginJs from '@eslint/js';

/* eslint 'key-spacing': ['error', { multiLine: { beforeColon : false, afterColon: true } }] */

export default [
	{ languageOptions: { globals: globals.browser } },
	pluginJs.configs.recommended,
	{
		rules: {
			'arrow-parens': ['error', 'as-needed'],
			'arrow-spacing': 'error',
			'brace-style': 'error',
			camelcase: 'off',
			'comma-dangle': ['error', 'never'],
			'comma-spacing': ['error', { before: false, after: true }],
			'comma-style': ['error', 'last'],
			'no-constant-condition': 'off',
			'dot-notation': 'error',
			'no-empty': ['error', { allowEmptyCatch: true }],
			indent: ['error', 'tab', { flatTernaryExpressions: true }],
			'key-spacing': ['error', {
				multiLine: {
					beforeColon: false,
					afterColon: true
				},
				align: {
					beforeColon: true,
					afterColon: true,
					on: 'colon'
				}
			}],
			'keyword-spacing': ['error', {
				overrides: {
					catch: { after: false },
					for: { after: false },
					if: { after: false },
					switch: { after: false },
					while: { after: false }
				}
			}],
			'linebreak-style': ['error', 'windows'],
			'max-len': ['error', 110, { ignoreRegExpLiterals: true, ignoreUrls: true }],
			'new-cap': ['error', {
				capIsNewExceptions: [
					'GM_getValue',
					'GM_setValue',
					'GM_deleteValue',
					'GM_openInTab',
					'GM_openInTab',
					'GM_xmlhttpRequest'
				]
			}],
			'no-case-declarations': 'error',
			'no-const-assign': 'error',
			'no-extra-parens': ['error', 'all', {
				conditionalAssign: false,
				nestedBinaryExpressions: false,
				returnAssign: false
			}],
			'no-extra-semi': 'error',
			'no-global-assign': ['error', { exceptions: ['FormData'] }],
			'no-labels': ['error', { allowLoop: true }],
			'no-mixed-spaces-and-tabs': 'error',
			'no-multi-spaces': ['error', {
				ignoreEOLComments: true,
				exceptions: { VariableDeclarator: true }
			}],
			'no-tabs': ['error', { allowIndentationTabs: true }],
			'no-trailing-spaces': 'error',
			'no-undef': 'error',
			'no-unsafe-optional-chaining': 'error',
			'no-useless-concat': 'error',
			'no-unused-vars': ['error', { caughtErrors: 'none', vars: 'all', args: 'after-used' }],
			'object-curly-newline': ['error', { multiline: true }],
			'object-curly-spacing': ['error', 'always'],
			'object-property-newline': ['error', { allowAllPropertiesOnSameLine: true }],
			'object-shorthand': ['error', 'always'],
			'one-var': ['error', { initialized: 'never', uninitialized: 'consecutive' }],
			'prefer-arrow-callback': 'error',
			'prefer-const': ['error', { destructuring: 'all' }],
			'prefer-destructuring': ['error', { object: true }],
			quotes: ['error', 'single'],
			'quote-props': ['error', 'as-needed'],
			'require-jsdoc': 'off',
			semi: ['error', 'always'],
			'space-in-parens': ['error', 'never'],
			'template-curly-spacing': ['error', 'always']
		}
	}
];