eslint.config.mjs

import globals from "globals";
import babelParser from "@babel/eslint-parser";

export default [{
  ignores: ["**/coverage/", "**/dist/"],
}, {
  languageOptions: {
    globals: {
      ...globals.node,
      ...globals.webextensions,
      ...globals.browser,
      globalThis: true,
    },

    parser: babelParser,
    ecmaVersion: 6,
    sourceType: "script",

    parserOptions: {
      requireConfigFile: false,
    },
  },

  rules: {
    "arrow-spacing": 2,
    "block-spacing": 1,
    "array-bracket-spacing": [2, "never"],
    "object-curly-spacing": [2, "never"],
    "space-in-parens": [2, "never"],

    "brace-style": [2, "1tbs", {
      allowSingleLine: true,
    }],

    "comma-spacing": [2, {
      before: false,
      after: true,
    }],

    "comma-style": 2,
    "computed-property-spacing": [1, "never"],
    "consistent-return": 0,
    curly: [2, "all"],
    "eol-last": 2,

    "generator-star-spacing": [2, {
      before: false,
      after: true,
    }],

    indent: [2, 2, {
      SwitchCase: 1,

      CallExpression: {
        arguments: "first",
      },
    }],

    "key-spacing": [2, {
      beforeColon: false,
      afterColon: true,
      mode: "minimum",
    }],

    "keyword-spacing": 2,
    "linebreak-style": [2, "unix"],
    "new-parens": 2,
    "no-array-constructor": 2,
    "no-dupe-args": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-empty": 2,
    "no-empty-character-class": 2,
    "no-empty-pattern": 2,
    "no-ex-assign": 2,
    "no-extra-boolean-cast": 1,
    "no-extra-semi": 2,
    "no-func-assign": 2,
    "no-invalid-regexp": 2,
    "no-irregular-whitespace": 2,
    "no-lonely-if": 1,
    "no-mixed-spaces-and-tabs": [2, "smart-tabs"],
    "no-multi-spaces": 1,
    "no-native-reassign": 2,
    "no-negated-in-lhs": 2,
    "no-nested-ternary": 2,
    "no-new-object": 2,
    "no-obj-calls": 2,
    "no-octal": 2,
    "no-redeclare": 2,
    "no-self-compare": 2,
    "no-spaced-func": 1,
    "no-trailing-spaces": 2,
    "no-unexpected-multiline": 2,
    "no-unreachable": 2,
    "no-unused-expressions": 2,

    "no-unused-vars": [2, {
      args: "none",
      varsIgnorePattern: "^(Cc|Ci|Cr|Cu|EXPORTED_SYMBOLS)$",
    }],

    "no-use-before-define": 2,
    "no-with": 2,
    semi: [2, "always"],
    "space-before-blocks": 2,

    "space-before-function-paren": [2, {
      anonymous: "never",
      named: "never",
    }],

    "space-infix-ops": [2, {
      int32Hint: true,
    }],

    "space-unary-ops": [1, {
      nonwords: false,
      words: true,

      overrides: {
        typeof: false,
      },
    }],

    "use-isnan": 2,
    "valid-typeof": 2,
    "block-scoped-var": 2,
    "comma-dangle": [2, "always-multiline"],
    complexity: 1,
    "default-case": 0,
    "dot-location": [2, "property"],
    "dot-notation": 2,
    eqeqeq: 0,
    "func-names": 0,
    "func-style": 0,
    "max-depth": 0,
    "max-len": [0, 80],
    "max-nested-callbacks": [2, 4],
    "max-params": 0,
    "max-statements": 0,

    "new-cap": [0, {
      capIsNew: false,
    }],

    "no-bitwise": 0,
    "no-caller": 2,
    "no-catch-shadow": 0,
    "no-cond-assign": 2,
    "no-constant-condition": 0,
    "no-continue": 0,
    "no-control-regex": 2,
    "no-debugger": 2,
    "no-delete-var": 2,
    "no-div-regex": 0,
    "no-eval": 2,
    "no-extend-native": 2,
    "no-extra-bind": 2,
    "no-extra-parens": 0,
    "no-fallthrough": 2,
    "no-floating-decimal": 0,
    "no-inline-comments": 0,

    "no-labels": [2, {
      allowLoop: true,
    }],

    "no-multi-str": 1,

    "no-multiple-empty-lines": [1, {
      max: 2,
    }],

    "no-param-reassign": 0,
    "no-path-concat": 0,
    "no-plusplus": 0,
    "no-process-env": 0,
    "no-process-exit": 0,
    "no-proto": 2,
    "no-regex-spaces": 2,
    "no-reserved-keys": 0,
    "no-restricted-modules": 0,
    "no-return-assign": 2,
    "no-shadow": 0,
    "no-shadow-restricted-names": 2,
    "no-sync": 0,
    "no-ternary": 0,
    "no-throw-literal": 2,
    "no-undef": 2,
    "no-underscore-dangle": 0,
    "no-undefined": 0,
    "no-unneeded-ternary": 2,
    "no-var": 0,
    "no-warning-comments": 0,
    "object-shorthand": 0,
    "one-var": 0,
    "padded-blocks": [1, "never"],
    "quote-props": 0,

    quotes: [2, "double", {
      avoidEscape: true,
      allowTemplateLiterals: true,
    }],

    radix: 2,

    "semi-spacing": [2, {
      before: false,
      after: true,
    }],

    "sort-vars": 0,
    "spaced-comment": [2, "always"],
    strict: [0, "global"],
    "vars-on-top": 0,
    "wrap-iife": 0,
    "wrap-regex": 0,
    yoda: 2,
    "no-implied-eval": 2,
    "no-inner-declarations": 2,
    "no-iterator": 2,
    "no-label-var": 2,
    "no-new-wrappers": 2,
  },
}];