.eslintrc

{
    "root": true,
    "parserOptions": {
        "ecmaVersion": 2019,
        "sourceType": "module"
    },
    "plugins": ["import", "destructuring", "switch-case", "promise"],
    "settings": {
        "import/ignore": ["libs", "node_modules"]
    },
    "globals": {
        // define our own globals since the built-in list contains many false negatives like "find" that are non-standard
        "window": false,
        "document": false,
        "location": false,
        "escape": false,
        "unescape": false,
        "setTimeout": false,
        "clearTimeout": false,
        "setInterval": false,
        "clearInterval": false,
        "console": false,
        "sessionStorage": false,
        "localStorage": false,
        "XMLHttpRequest": false,
        "atob": false,
        "Blob": false,
        "navigator": false,
        "MessageChannel": false,
        "Map": false,
        "Uint8Array": false,
        "Promise": false,
        "HTMLElement": false,
        "MouseEvent": false,
        "setImmediate": false,
        "fetch": false,
        "Uint16Array": false,
        "crypto": false,
        "$": false,
        "DataView": true,
        "Int8Array": true,
        "ArrayBuffer": true,
        "WebSocket": true
    },
    "rules": {
        // Possible errors
        "no-await-in-loop": "error",
        "no-compare-neg-zero": "error",
        "no-cond-assign": "off",
        "no-console": "error",
        "no-constant-condition": "error",
        "no-control-regex": "error",
        "no-debugger": "error",
        "no-dupe-args": "error",
        "no-dupe-keys": "error",
        "no-duplicate-case": "error",
        "no-empty": "error",
        "no-empty-character-class": "error",
        "no-ex-assign": "error",
        "no-extra-boolean-cast": "error",
        "no-extra-parens": ["error", "functions"],
        "no-extra-semi": "error",
        "no-func-assign": "error",
        "no-inner-declarations": ["error", "functions"],
        "no-invalid-regexp": "error",
        "no-obj-calls": "error",
        "no-prototype-builtins": "off",
        "no-sparse-arrays": "error",
        "no-template-curly-in-string": "off",
        "no-unexpected-multiline": "error",
        "no-unreachable": "error",
        "no-unsafe-negation": "error",
        "no-unsafe-finally": "error",
        "use-isnan": "error",
        "valid-jsdoc": [
            "off",
            {
                "requireReturn": false,
                "requireParamDescription": false,
                "requireReturnDescription": false
            }
        ],
        "valid-typeof": "error",
        // Best practices
        "accessor-pairs": "off",
        "array-callback-return": "error",
        "block-scoped-var": "error",
        "class-methods-use-this": "off",
        "complexity": ["error", 19],
        "consistent-return": "off",
        "curly": ["error", "all"],
        "default-case": "off",
        "dot-location": ["error", "property"],
        "dot-notation": "off",
        "eqeqeq": ["error", "always", { "null": "ignore" }],
        "guard-for-in": "error",
        "no-alert": "error",
        "no-caller": "error",
        "no-case-declarations": "error",
        "no-div-regex": "error",
        "no-else-return": "error",
        "no-empty-function": "off",
        // Related - lodash/use-noop
        "no-empty-pattern": "error",
        "no-eq-null": "off",
        // see also eqeqeq
        "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-implicit-coercion": "error",
        "no-implicit-globals": "error",
        "no-implied-eval": "error",
        "no-invalid-this": "off",
        "no-iterator": "error",
        "no-labels": "error",
        "no-lone-blocks": "error",
        "no-loop-func": "error",
        "no-magic-numbers": [
            "off",
            {
                "ignore": [-1, 0, 1, 2]
            }
        ],
        "no-multi-str": "error",
        "no-new": "off",
        "no-new-func": "error",
        "no-new-wrappers": "error",
        "no-octal": "error",
        "no-octal-escape": "error",
        "no-param-reassign": "off",
        "no-proto": "error",
        "no-redeclare": "error",
        "no-return-assign": "error",
        "no-return-await": "error",
        "no-script-url": "error",
        "no-self-assign": "error",
        "no-self-compare": "error",
        "no-sequences": "error",
        "no-throw-literal": "off",
        "no-unmodified-loop-condition": "error",
        "no-unused-expressions": "error",
        "no-unused-labels": "error",
        "no-useless-call": "error",
        "no-useless-concat": "error",
        "no-useless-escape": "error",
        "no-useless-return": "error",
        "no-void": "error",
        "no-warning-comments": "off",
        "no-with": "error",
        "radix": ["error", "always"],
        "require-await": "off",
        // fixed in es5 but we support android 4.1-4.3 which require a radix
        "vars-on-top": "off",
        "wrap-iife": ["error", "any"],
        "yoda": ["error", "never"],
        // Strict mode
        "strict": "error",
        // Variables
        "init-declarations": "off",
        "no-catch-shadow": "error",
        "no-delete-var": "off",
        "no-label-var": "error",
        "no-restricted-globals": "off",
        "no-shadow": "error",
        "no-shadow-restricted-names": "error",
        "no-undef": "error",
        "no-undef-init": "off",
        "no-undefined": "off",
        "no-unused-vars": [
            "error",
            {
                "vars": "all",
                "args": "none"
            }
        ],
        "no-use-before-define": ["error", "nofunc"],
        // Node.js and CommonJS
        "callback-return": "off",
        "global-require": "off",
        "handle-callback-err": "off",
        "no-mixed-requires": "off",
        "no-new-require": "off",
        "no-path-concat": "off",
        "no-process-env": "off",
        "no-process-exit": "off",
        "no-restricted-modules": "off",
        "no-restricted-properties": "off",
        "no-sync": "off",

        // Stylistic issues
        "array-bracket-spacing": ["error", "never"],
        "block-spacing": ["error", "always"],
        "brace-style": [
            "error",
            "1tbs",
            {
                "allowSingleLine": false
            }
        ],
        "camelcase": [
            "error",
            {
                "properties": "always"
            }
        ],
        "capitalized-comments": ["off", "never"],
        "comma-dangle": ["error", "always-multiline"],
        "comma-spacing": [
            "error",
            {
                "before": false,
                "after": true
            }
        ],
        "comma-style": ["error", "last"],
        "computed-property-spacing": ["error", "never"],
        "consistent-this": "off",
        "eol-last": "error",
        "func-call-spacing": ["error", "never"],
        "func-name-matching": "error",
        "func-names": "off",
        "func-style": [
            "error",
            "declaration",
            {
                "allowArrowFunctions": true
            }
        ],
        "id-blacklist": "off",
        "id-length": ["off"],
        "id-match": "off",
        "key-spacing": [
            "error",
            {
                "beforeColon": false,
                "afterColon": true
            }
        ],
        "keyword-spacing": "error",
        "line-comment-position": "off",
        "linebreak-style": ["error", "windows"],
        "lines-around-comment": "off",
        "lines-around-directive": "off",
        "max-depth": ["error", 6],
        "max-len": [
            "error",
            {
                "code": 150
            }
        ],
        "max-lines": [
            "error",
            {
                "skipBlankLines": true,
                "skipComments": true,
                "max": 900
            }
        ],
        "max-nested-callbacks": ["error", 3],
        "max-params": ["error", 8],
        "max-statements": ["error", 43],
        "max-statements-per-line": [
            "error",
            {
                "max": 2
            }
        ],
        "multiline-ternary": "off",
        "new-cap": [
            "error",
            {
                "newIsCap": true,
                "capIsNew": true
            }
        ],
        "newline-after-var": "off",
        "newline-before-return": "off",
        "newline-per-chained-call": "off",
        "no-array-constructor": "error",
        "no-bitwise": "off",
        "no-continue": "off",
        "no-inline-comments": "off",
        "no-lonely-if": "error",
        "no-multi-assign": "off",
        "no-negated-condition": "off",
        "no-nested-ternary": "error",
        "no-new-object": "error",
        "no-plusplus": "off",
        "no-restricted-syntax": "off",
        "no-ternary": "off",
        "no-underscore-dangle": [
            "off",
            {
                "allow": ["_"]
            }
        ],
        // required in a few cases
        "no-unneeded-ternary": [
            "error",
            {
                "defaultAssignment": false
            }
        ],
        "nonblock-statement-body-position": "off",
        "one-var": [
            "error",
            {
                "let": "never",
                "const": "never"
            }
        ],
        "one-var-declaration-per-line": "off",
        "operator-assignment": ["error", "always"],
        "sort-keys": "off",
        "sort-vars": "off",
        "template-tag-spacing": "off",
        "unicode-bom": "off",
        "wrap-regex": "off",
        // ES2015 rules
        "constructor-super": "error",
        "no-class-assign": "error",
        "no-confusing-arrow": "off",
        "no-const-assign": "error",
        "no-dupe-class-members": "error",
        "no-duplicate-imports": "error",
        "no-new-symbol": "error",
        "no-restricted-imports": "error",
        "no-this-before-super": "error",
        "no-useless-computed-key": "error",
        "no-useless-constructor": "error",
        "no-useless-rename": "error",
        "no-var": "error",
        "object-shorthand": "error",
        "prefer-arrow-callback": "off",
        "prefer-const": [
            "error",
            {
                "ignoreReadBeforeAssign": true
            }
        ],
        "prefer-destructuring": "off", // could consider when autofixed
        "prefer-numeric-literals": "off",
        "prefer-promise-reject-errors": "off",
        "prefer-reflect": "off",
        "prefer-rest-params": "off",
        "prefer-spread": "off",
        "prefer-template": "off",
        "sort-imports": "off",
        "symbol-description": "off",
        "require-yield": "off",
        "template-curly-spacing": "off",
        "yield-star-spacing": "off",
        // import - static analysis
        "import/no-unresolved": "error",
        "import/named": "error",
        "import/default": "error",
        "import/namespace": "error",
        "import/no-dynamic-require": "off",
        "import/no-internal-modules": "off",
        "import/no-restricted-paths": [
            "off",
            {
                "zones": []
            }
        ],
        "import/no-absolute-path": "error",
        "import/no-webpack-loader-syntax": "off",

        // import - warnings
        "import/export": "error",
        "import/no-named-as-default": "error",
        "import/no-named-as-default-member": "error",
        "import/no-deprecated": "error",
        "import/no-extraneous-dependencies": "error",
        "import/no-mutable-exports": "error",
        // import - module systems
        "import/unambiguous": "off",
        "import/no-commonjs": "error",
        "import/no-amd": "error",
        "import/no-nodejs-modules": "error",
        // import - stylistic
        "import/no-duplicates": "error",
        "import/no-namespace": "off",
        "import/extensions": [
            "error",
            {
                "js": "never",
                "json": "always"
            }
        ],
        "import/first": "error",
        "import/order": [
            "error",
            {
                "groups": [
                    ["builtin", "external"],
                    "internal",
                    "parent",
                    ["sibling", "index"]
                ],
                "newlines-between": "ignore"
            }
        ],
        "import/newline-after-import": "error",
        "import/prefer-default-export": "off",
        "import/no-unassigned-import": "off",
        // Destructuring plugin
        "destructuring/no-rename": "error",
        "destructuring/in-params": [
            "error",
            {
                "max-params": 1
            }
        ],
        // Switch-Case
        "switch-case/no-case-curly": "error",
        "promise/catch-or-return": "off",
        "promise/param-names": "error",
        "promise/no-native": "off",
        "promise/no-return-wrap": "off",
        "promise/always-return": "off",
        "promise/no-nesting": "off",
        "promise/no-promise-in-callback": "error",
        "promise/no-callback-in-promise": "off",
        "promise/prefer-await-to-then": "off",
        "promise/prefer-await-to-callbacks": "off",
        //Jest plugin
        "jest/no-focused-tests": "error",
        "jest/no-disabled-tests": "error",
        "jest/no-identical-title": "error",
        "jest/no-commented-out-tests": "error",
        "jest/valid-describe": "error",
        "jest/valid-expect": "error",
        "jest/valid-expect-in-promise": "error",
        "jest/consistent-test-it": "error",
        "jest/no-try-expect": "error",
        "jest/no-standalone-expect": "error",
        "jest/prefer-hooks-on-top": "error"
    },
    "overrides": [
        {
            "files": ["*.spec.js", "src/test/**/*"],
            "env": {
                "jest": true
            },
            "globals": {
                "global": false
            },
            "plugins": ["jest"],
            "rules": {
                "max-nested-callbacks": "off",
                "camelcase": "off",
                "max-len": "off",
                "max-statements": "off",
                "max-lines": "off",
                "destructuring/in-params": "off"
            }
        },
        {
            "files": ["rollup.config.js"],
            "env": {
                "node": true
            },
            "globals": {
                "global": false
            },
            "rules": {
                "import/no-commonjs": "off",
                "import/no-nodejs-modules": "off"
            }
        }
    ]
}