.eslintrc.json

{
    "env": {
        "es2021": true,
        "shared-node-browser": true
    },
    "extends": "eslint:recommended",
    "rules": {
        "array-bracket-newline": [
            "error",
            "consistent"
        ],
        "array-bracket-spacing": [
            "error",
            "never"
        ],
        "array-callback-return": "error",
        "arrow-spacing": "error",
        "block-scoped-var": "error",
        "block-spacing": "error",
        "brace-style": "error",
        "comma-dangle": [
            "error",
            {
                "arrays": "always-multiline",
                "objects": "always-multiline",
                "functions": "never"
            }
        ],
        "comma-spacing": [
            "error",
            {
                "before": false,
                "after": true
            }
        ],
        "comma-style": [
            "error",
            "last"
        ],
        "computed-property-spacing": "error",
        "curly": [
            "error",
            "multi-or-nest",
            "consistent"
        ],
        "dot-location": [
            "error",
            "property"
        ],
        "eol-last": "error",
        "eqeqeq": "error",
        "func-call-spacing": "error",
        "func-name-matching": "error",
        "func-style": [
            "error",
            "declaration",
            {
                "allowArrowFunctions": true
            }
        ],
        "grouped-accessor-pairs": [
            "error",
            "getBeforeSet"
        ],
        "indent": [
            "error",
            4,
            {
                "ignoredNodes": [
                    "CallExpression[callee.object.name=GObject][callee.property.name=registerClass] > ClassExpression:first-child"
                ],
                "MemberExpression": "off",
                "SwitchCase": 1
            }
        ],
        "key-spacing": [
            "error",
            {
                "beforeColon": false,
                "afterColon": true
            }
        ],
        "keyword-spacing": [
            "error",
            {
                "before": true,
                "after": true
            }
        ],
        "linebreak-style": [
            "error",
            "unix"
        ],
        "lines-between-class-members": "error",
        "max-nested-callbacks": [
            "error",
            {
                "max": 5
            }
        ],
        "max-statements-per-line": "error",
        "new-parens": "error",
        "no-array-constructor": "error",
        "no-caller": "error",
        "no-constant-condition": [
            "error",
            {
                "checkLoops": false
            }
        ],
        "no-empty": [
            "error",
            {
                "allowEmptyCatch": true
            }
        ],
        "no-extra-bind": "error",
        "no-implicit-coercion": [
            "error",
            {
                "allow": [
                    "!!"
                ]
            }
        ],
        "no-iterator": "error",
        "no-label-var": "error",
        "no-lonely-if": "error",
        "no-loop-func": "error",
        "no-nested-ternary": "error",
        "no-new-object": "error",
        "no-new-wrappers": "error",
        "no-octal-escape": "error",
        "no-proto": "error",
        "no-prototype-builtins": "off",
        "no-restricted-properties": [
            "error",
            {
                "object": "Lang",
                "property": "bind",
                "message": "Use arrow notation or Function.prototype.bind()"
            },
            {
                "object": "Lang",
                "property": "Class",
                "message": "Use ES6 classes"
            },
            {
                "object": "imports",
                "property": "mainloop",
                "message": "Use GLib main loops and timeouts"
            }
        ],
        "no-restricted-syntax": [
            "error",
            {
                "selector": "MethodDefinition[key.name=\"_init\"] > FunctionExpression[params.length=1] > BlockStatement[body.length=1] CallExpression[arguments.length=1][callee.object.type=\"Super\"][callee.property.name=\"_init\"] > Identifier:first-child",
                "message": "_init() that only calls super._init() is unnecessary"
            },
            {
                "selector": "MethodDefinition[key.name=\"_init\"] > FunctionExpression[params.length=0] > BlockStatement[body.length=1] CallExpression[arguments.length=0][callee.object.type=\"Super\"][callee.property.name=\"_init\"]",
                "message": "_init() that only calls super._init() is unnecessary"
            }
        ],
        "no-return-assign": "error",
        "no-return-await": "error",
        "no-self-compare": "error",
        "no-shadow-restricted-names": "error",
        "no-spaced-func": "error",
        "no-tabs": "error",
        "no-template-curly-in-string": "error",
        "no-throw-literal": "error",
        "no-trailing-spaces": "error",
        "no-undef-init": "error",
        "no-unneeded-ternary": "error",
        "no-unused-expressions": "error",
        "no-unused-vars": [
            "error",
            {
                "args": "none",
                "vars": "local"
            }
        ],
        "no-useless-call": "error",
        "no-useless-computed-key": "error",
        "no-useless-concat": "error",
        "no-useless-constructor": "error",
        "no-useless-rename": "error",
        "no-useless-return": "error",
        "no-whitespace-before-property": "error",
        "no-with": "error",
        "nonblock-statement-body-position": [
            "error",
            "below"
        ],
        "object-curly-newline": [
            "error",
            {
                "consistent": true
            }
        ],
        "object-curly-spacing": "error",
        "operator-assignment": "error",
        "operator-linebreak": "error",
        "prefer-const": "error",
        "prefer-numeric-literals": "error",
        "prefer-promise-reject-errors": "error",
        "prefer-rest-params": "error",
        "prefer-spread": "error",
        "quotes": [
            "error",
            "single",
            {
                "avoidEscape": true
            }
        ],
        "require-await": "error",
        "rest-spread-spacing": "error",
        "semi": [
            "error",
            "always"
        ],
        "semi-spacing": [
            "error",
            {
                "before": false,
                "after": true
            }
        ],
        "semi-style": "error",
        "space-before-blocks": "error",
        "space-before-function-paren": [
            "error",
            {
                "named": "never",
                "anonymous": "always",
                "asyncArrow": "always"
            }
        ],
        "space-in-parens": "error",
        "space-infix-ops": [
            "error",
            {
                "int32Hint": false
            }
        ],
        "space-unary-ops": "error",
        "spaced-comment": "error",
        "switch-colon-spacing": "error",
        "symbol-description": "error",
        "template-curly-spacing": "error",
        "template-tag-spacing": "error",
        "unicode-bom": "error",
        "valid-jsdoc": [
            "error",
            {
                "requireReturn": false
            }
        ],
        "wrap-iife": [
            "error",
            "inside"
        ],
        "yield-star-spacing": "error",
        "yoda": "error"
    },
    "globals": {
        "ARGV": "readonly",
        "Debugger": "readonly",
        "GIRepositoryGType": "readonly",
        "globalThis": "readonly",
        "imports": "readonly",
        "Intl": "readonly",
        "log": "readonly",
        "logError": "readonly",
        "print": "readonly",
        "printerr": "readonly",

        "global": false,
        "debug": false,
        "_": false,
        "_C": false,
        "_N": false,
        "ngettext": false
    },
    "parserOptions": {
        "ecmaVersion": "latest",
        "sourceType": "module"
    }
}