.eslintrc.js

module.exports = {
  "env": { "browser": true, "es2021": true },
  "globals": {
    "$": "readonly",
    "bootstrap": "readonly",
    "sakai": "readonly",
    "sakaiSessionId": "readonly",
    "portal": "readonly",
    "profile": "readonly",
    "CKEDITOR": "readonly",
    "moment": "readonly",
    "confirmDatePlugin": "readonly",
    "flatpickr": "readonly",
    "jQuery": "readonly",
    "MathJax": "readonly",
  },
  "extends": [ "eslint:recommended", "plugin:lit/recommended" ],
  "parserOptions": { "ecmaVersion": 2020, "sourceType": "module" },
  "plugins": ["html"],
  "rules": {
    "accessor-pairs": "error",
    "array-bracket-spacing": [ 'error', 'always' ],
    "array-callback-return": "error",
    "arrow-spacing": "error",
    "block-spacing": "error",
    "camelcase" : "error",
    "comma-spacing": "error",
    "dot-notation": "error",
    "indent": ["error", 2, { "SwitchCase": 1, "MemberExpression": "off", "ImportDeclaration": "off", "ignoredNodes": ["TemplateLiteral > *"] }],
    "keyword-spacing": "error",
    "linebreak-style": ["error", "unix"],
    "no-array-constructor": "error",
    "no-caller": "error",
    "no-cond-assign": "error",
    "no-constructor-return": "error",
    "no-duplicate-imports": "error",
    "no-else-return": "error",
    "no-empty": ["error", { allowEmptyCatch: true }],
    "no-eval": "error",
    "no-extend-native": ["error", { "exceptions": ["Date"] }],
    "no-extra-bind": "error",
    "no-implied-eval": "error",
    "no-iterator": "error",
    "no-labels": "error",
    "no-lone-blocks": "error",
    "no-lonely-if": "error",
    "no-loop-func": "error",
    "no-loss-of-precision": "error",
    "no-multi-str": "error",
    "no-multiple-empty-lines": "error",
    "no-new-func": "error",
    "no-new-object": "error",
    "no-new-wrappers": "error",
    "no-octal-escape": "error",
    "no-param-reassign": "error",
    "no-proto": "error",
    "no-redeclare": "error",
    "no-return-await": "error",
    "no-script-url": "error",
    "no-self-compare": "error",
    "no-sequences": "error",
    "no-shadow": ["error", { "allow": ["html"] }],
    "no-tabs": "error",
    "no-trailing-spaces": "error",
    "no-multi-spaces" : "error",
    "no-undef": "error",
    "no-undef-init": "error",
    "no-unmodified-loop-condition": "error",
    "no-unneeded-ternary": ["error", { defaultAssignment: false }],
    "no-unreachable-loop": "error",
    "no-unused-vars": ["error"],
    "no-use-before-define": ["error", "nofunc"],
    "no-useless-backreference": "error",
    "no-useless-call": "error",
    "no-useless-computed-key": "error",
    "no-useless-constructor": "error",
    "no-useless-escape": "error",
    "no-useless-rename": "error",
    "no-useless-return": "error",
    "no-var": "error",
    "object-curly-spacing": [ 'error', 'always' ],
    "object-shorthand": "error",
    "prefer-arrow-callback": "error",
    "prefer-const": "error",
    "prefer-const": "error",
    "prefer-exponentiation-operator": "error",
    "prefer-numeric-literals": "error",
    "prefer-object-spread": "error",
    "prefer-regex-literals": "error",
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "quotes": [ "error", "double" ],
    "require-atomic-updates": "error",
    "semi": ["warn", "always"],
    "space-infix-ops": "error",
    "space-before-blocks": "error",
    "strict": "error",
    "yoda": ["error", "never", { onlyEquality: true }],
  }
};