.eslintrc

{
  "parserOptions": {
    "ecmaVersion": 2020,
    "sourceType": "module",
  },

  "plugins": [
    "import",
    "mozilla",
    "no-unsanitized",
    "unicorn",
  ],

  "extends": [
    "plugin:prettier/recommended"
  ],

  "env": {
    "browser": true,
    "es2020": true,
    "worker": true,
    "amd": true,
  },

  "globals": {
    "PDFJSDev": false,
    "exports": false,
    "SystemJS": false,
  },

  "rules": {
    // Plugins
    "import/extensions": ["error", "always", { "ignorePackages": true, }],
    "import/no-unresolved": "error",
    "mozilla/avoid-removeChild": "error",
    "mozilla/use-includes-instead-of-indexOf": "error",
    "no-unsanitized/method": "error",
    "no-unsanitized/property": "error",
    "unicorn/no-array-instanceof": "error",
    "unicorn/prefer-starts-ends-with": "error",

    // Possible errors
    "for-direction": "error",
    "getter-return": "error",
    "no-async-promise-executor": "error",
    "no-cond-assign": ["error", "except-parens"],
    "no-constant-condition": ["error", { "checkLoops": false, }],
    "no-dupe-args": "error",
    "no-dupe-else-if": "error",
    "no-dupe-keys": "error",
    "no-duplicate-case": "error",
    "no-empty": ["error", { "allowEmptyCatch": true, }],
    "no-ex-assign": "error",
    "no-extra-boolean-cast": "error",
    "no-func-assign": "error",
    "no-inner-declarations": ["error", "functions"],
    "no-invalid-regexp": "error",
    "no-irregular-whitespace": "error",
    "no-obj-calls": "error",
    "no-promise-executor-return": "error",
    "no-regex-spaces": "error",
    "no-setter-return": "error",
    "no-sparse-arrays": "error",
    "no-unexpected-multiline": "error",
    "no-unreachable": "error",
    "no-unsafe-finally": "error",
    "no-unsafe-negation": "error",
    "use-isnan": ["error", { "enforceForIndexOf": true, }],
    "valid-typeof": ["error", { "requireStringLiterals": true, }],

    // Best Practices
    "accessor-pairs": ["error", {
      "setWithoutGet": true,
      "enforceForClassMembers": true,
    }],
    "consistent-return": "error",
    "curly": ["error", "all"],
    "default-case-last": "error",
    "dot-notation": "error",
    "eqeqeq": ["error", "always"],
    "grouped-accessor-pairs": ["error", "getBeforeSet"],
    "no-caller": "error",
    "no-else-return": "error",
    "no-empty-pattern": "error",
    "no-eval": "error",
    "no-extend-native": "error",
    "no-extra-bind": "error",
    "no-extra-label": "error",
    "no-fallthrough": "error",
    "no-floating-decimal": "error",
    "no-global-assign": "error",
    "no-implied-eval": "error",
    "no-iterator": "error",
    "no-lone-blocks": "error",
    "no-multi-str": "error",
    "no-new-func": "error",
    "no-new-wrappers": "error",
    "no-new": "error",
    "no-octal-escape": "error",
    "no-octal": "error",
    "no-redeclare": "error",
    "no-return-await": "error",
    "no-self-assign": "error",
    "no-self-compare": "error",
    "no-throw-literal": "error",
    "no-unused-expressions": "error",
    "no-unused-labels": "error",
    "no-useless-call": "error",
    "no-useless-catch": "error",
    "no-useless-concat": "error",
    "no-useless-return": "error",
    "prefer-promise-reject-errors": "error",
    "wrap-iife": ["error", "any"],
    "yoda": ["error", "never", {
      "exceptRange": true,
    }],

    // Strict Mode
    "strict": ["off", "global"],

    // Variables
    "no-catch-shadow": "error",
    "no-delete-var": "error",
    "no-label-var": "error",
    "no-shadow": "error",
    "no-shadow-restricted-names": "error",
    "no-undef-init": "error",
    "no-undef": ["error", { "typeof": true, }],
    "no-unused-vars": ["error", {
      "vars": "local",
      "args": "none",
    }],

    // Node.js and CommonJS
    "no-buffer-constructor": "error",

    // Stylistic Issues
    "lines-between-class-members": ["error", "always"],
    "max-len": ["error", {
      "code": 1000,
      "comments": 80,
      "ignoreUrls": true
    }],
    "new-cap": ["error", { "newIsCap": true, "capIsNew": false, }],
    "no-array-constructor": "error",
    "no-multiple-empty-lines": ["error", { "max": 1, "maxEOF": 0, "maxBOF": 1, }],
    "no-nested-ternary": "error",
    "no-new-object": "error",
    "no-restricted-syntax": ["error",
      {
        "selector": "CallExpression[callee.name='assert'][arguments.length!=2]",
        "message": "`assert()` must always be invoked with two arguments.",
      },
      {
        "selector": "NewExpression[callee.name='Cmd']",
        "message": "Use `Cmd.get()` rather than `new Cmd()`.",
      },
      {
        "selector": "NewExpression[callee.name='Name']",
        "message": "Use `Name.get()` rather than `new Name()`.",
      },
      {
        "selector": "NewExpression[callee.name='Ref']",
        "message": "Use `Ref.get()` rather than `new Ref()`.",
      },
    ],
    "no-unneeded-ternary": "error",
    "prefer-exponentiation-operator": "error",
    "spaced-comment": ["error", "always", {
      "block": {
        "balanced": true,
      }
    }],

    // ECMAScript 6
    "constructor-super": "error",
    "no-class-assign": "error",
    "no-confusing-arrow": "error",
    "no-const-assign": "error",
    "no-dupe-class-members": "error",
    "no-duplicate-imports": "error",
    "no-this-before-super": "error",
    "no-useless-computed-key": "error",
    "no-useless-constructor": "error",
    "no-useless-rename": "error",
    "no-var": "off",
    "object-shorthand": ["error", "always", {
      "avoidQuotes": true,
    }],
    "prefer-const": "error",
    "sort-imports": ["error", {
      "ignoreCase": true,
    }],
    "template-curly-spacing": ["error", "never"],
  },
}