eslint.config.mjs

// eslint.config.js
import jsdoc from "eslint-plugin-jsdoc";

export default [
    {
        name: "eslint/global-ignores",
        // globally ignore below directories and files
        ignores: [
            "*.config.mjs",
            "dist/**/*",
            "build/**/*",
            "tests/**/*",
            "docs/**/*"]
    },
    {
        name: "eslint/global-rules",
        languageOptions: {
            "ecmaVersion" : 2020,
            "sourceType": "module"
        },
        files: ["src/**/*.js"],
        plugins: {
            jsdoc
        },
        rules: {
             // http://eslint.org/docs/rules/
            "accessor-pairs": "error",
            "array-callback-return": "error",
            "arrow-body-style": ["error", "as-needed"],
            "arrow-spacing": ["error", { "before": true, "after": true }],
            "block-spacing": ["error", "always"],
            "block-scoped-var": "error",
            "brace-style": ["off", "1tbs", { "allowSingleLine": true }],
            "camelcase": ["off", { "properties": "never" }],
            "comma-dangle": ["error", "never"],
            "comma-spacing": ["error", { "before": false, "after": true }],
            "comma-style": ["error", "last"],
            "constructor-super": "error",
            "curly": ["error", "multi-line"],
            "dot-location": ["error", "property"],
            "eol-last": "error",
            "eqeqeq": ["error", "allow-null"],
            "func-call-spacing": ["error", "never"],
            "for-direction": "error",
            "handle-callback-err": ["error", "^(err|error)$" ],
            "indent": ["error", 4, { "ignoredNodes": ["SwitchCase"]}],
            "key-spacing": ["off", { "beforeColon": false, "afterColon": true }],
            "keyword-spacing": ["error", { "before": true, "after": true }],
            "new-cap": ["error", { "newIsCap": true, "capIsNew": false }],
            "new-parens": "error",
            "no-array-constructor": "error",
            "no-caller": "error",
            "no-class-assign": "error",
            "no-case-declarations": "error",
            "no-constructor-return": "error",
            "no-duplicate-imports": "error",
            "no-dupe-class-members": "error",
            "no-eval": "error",
            "no-extend-native": "error",
            "no-extra-bind": "error",
            "no-extra-parens": ["error", "functions"],
            "no-floating-decimal": "error",
            "no-implied-eval": "error",
            "no-implicit-coercion": "off",
            "no-implicit-globals": "error",
            "no-import-assign": "error",
            "no-iterator": "error",
            "no-label-var": "error",
            "no-labels": ["error", { "allowLoop": false, "allowSwitch": false }],
            "no-lone-blocks": "error",
            "no-loss-of-precision": "error",
            "no-mixed-spaces-and-tabs": "error",
            "no-multi-spaces": ["off", { "ignoreEOLComments": true }],
            "no-multi-str": "error",
            "no-multiple-empty-lines": ["off", { "max": 1 }],
            "no-native-reassign": "error",
            "no-negated-in-lhs": "error",
            "no-new": "error",
            "no-new-func": "error",
            "no-object-constructor": "error",
            "no-new-native-nonconstructor": "error",
            "no-new-require": "error",
            "no-new-wrappers": "error",
            "no-octal-escape": "error",
            "no-path-concat": "error",
            "no-proto": "error",
            "no-prototype-builtins": "off",
            "no-promise-executor-return": "error",
            "no-return-assign": ["error", "except-parens"],
            "no-self-compare": "error",
            "no-sequences": "off",
            "no-tabs": "error",
            "no-template-curly-in-string": "off",
            "no-this-before-super": "error",
            "no-throw-literal": "off",
            "no-trailing-spaces": "error",
            "no-undef-init": "error",
            "no-unmodified-loop-condition": "error",
            "no-unneeded-ternary": ["off", { "defaultAssignment": false }],
            "no-unreachable": "error",
            "no-unused-vars" : ["error", { "args": "after-used" }],
            "no-unused-private-class-members": "error",
            "no-useless-call": "off",
            "no-useless-computed-key": "error",
            "no-useless-constructor": "error",
            // used in RegExp
            "no-useless-escape" : "off",
            "no-useless-rename": "error",
            "no-whitespace-before-property": "error",
            "object-property-newline": ["error", { "allowMultiplePropertiesPerLine": true }],
            "one-var": ["off", { "initialized": "never" }],
            "operator-linebreak": ["off", "after", { "overrides": { "?": "before", ":": "before" } }],
            "padded-blocks": ["off", "never"],
            "prefer-arrow-callback" : "error",
            "quotes": ["error", "double", { "avoidEscape": true, "allowTemplateLiterals": true }],
            "rest-spread-spacing": ["error", "never"],
            "semi": ["error", "always"],
            "semi-spacing": ["error", { "before": false, "after": true }],
            "space-before-blocks": ["error", "always"],
            "space-before-function-paren": ["off", "always"],
            "space-in-parens": "error", // ["error", "never"],
            "space-infix-ops": "error",
            "space-unary-ops": ["off", { "words": true, "nonwords": false }],
            "spaced-comment": ["off", "always", { "line": { "markers": ["*package", "!", ","] }, "block": { "balanced": true, "markers": ["*package", "!", ","], "exceptions": ["*"] } }],
            "template-curly-spacing": ["error", "never"],
            "unicode-bom": ["error", "never"],
            "valid-typeof": ["error", { "requireStringLiterals": true }],
            "yield-star-spacing": ["error", "both"],
            "yoda": ["error", "never"],
            "jsdoc/require-hyphen-before-param-description": "error",
            "jsdoc/no-undefined-types" : "off"
        }
    }
];