.eslintrc.json

{
    "env": {
        "browser": true,
        "es6": true,
        "jest": true
    },
    "extends": [
        "plugin:import/typescript",
        "plugin:react/recommended",
        "plugin:@typescript-eslint/recommended",
        "airbnb"
    ],
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly"
    },
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
        "ecmaFeatures": {
            "jsx": true
        },
        "ecmaVersion": 2018,
        "sourceType": "module"
    },
    "plugins": [
        "react",
        "@typescript-eslint",
        "eslint-plugin-react-hooks"
    ],
    "rules": {
        "@typescript-eslint/no-explicit-any": "off",
        "@typescript-eslint/no-unused-vars": ["warn", { "args": "all", "varsIgnorePattern": "React", "argsIgnorePattern": "event" } ],
        "accessor-pairs": "off",
        "array-bracket-spacing": ["warn", "always"],
        "brace-style": ["warn", "1tbs", { "allowSingleLine": true }],
        "camelcase": ["warn", { "properties": "always" }],
        "class-methods-use-this": "off", //sometimes we use class methods to create singletons, with typescript these should be static methods
        "comma-dangle": ["warn", "always-multiline"],
        "comma-spacing": ["warn", { "before": false, "after": true }],
        "comma-style": ["warn", "last"],
        "complexity": "off",
        "computed-property-spacing": ["warn", "never"],
        "consistent-return": "off",
        "consistent-this": "off",
        "constructor-super": "warn",
        "curly": ["warn", "multi-line"],
        "default-case": "error",
        "dot-location": ["warn", "property"],
        "dot-notation": ["warn", { "allowKeywords": true, "allowPattern": "" }],
        "eol-last": "warn",
        "eqeqeq": "warn",
        "func-names": "off",
        "func-style": "off",
        "function-paren-newline": ["warn", "multiline"],
        "guard-for-in": "off",
        "handle-callback-err": "warn",
        "import/extensions": ["warn", "never"],
        "import/newline-after-import": "warn",
        "import/no-absolute-path": "off", // eslint does not parse path aliases properly
        "import/no-cycle": "warn",
        "import/no-unresolved": "warn",
        "import/no-useless-path-segments": "warn",
        "import/order": "warn",
        "import/no-default-export": "warn", // named exports are better and make aliasing explicit
        "import/prefer-default-export": "off", // named exports are better and make aliasing explicit
        "indent": ["warn", 2, { "SwitchCase": 1 }],
        "key-spacing": ["warn", { "beforeColon": false, "afterColon": true }],
        "keyword-spacing": "warn",
        "linebreak-style": "off",
        "lines-between-class-members": ["warn", "always", { "exceptAfterSingleLine": true } ],
        "max-depth": ["warn", 7], // Due to common use of objects as configuration and templates
        "max-len": ["warn", 150],
        "max-nested-callbacks": ["off", 3],
        "max-params": "off",
        "max-statements": "off",
        "new-cap": "error",
        "new-parens": "warn",
        "no-alert": "warn",
        "no-array-constructor": "warn",
        "no-await-in-loop": "warn",
        "no-bitwise": "warn",
        "no-caller": "warn",
        "no-case-declarations": "warn",
        "no-cond-assign": ["warn", "except-parens"],
        "no-console": "warn", 
        "no-constant-condition": "warn",
        "no-continue": "warn",
        "no-control-regex": "warn",
        "no-debugger": "warn",
        "no-delete-var": "warn",
        "no-div-regex": "warn",
        "no-dupe-args": "warn",
        "no-dupe-keys": "warn",
        "no-duplicate-case": "error",
        "no-else-return": "warn",
        "no-empty-character-class": "warn",
        "no-empty": "warn",
        "no-eq-null": "off", // ==null is useful to check for undefined or null vals
        "no-eval": "warn",
        "no-ex-assign": "warn",
        "no-extend-native": "warn",
        "no-extra-bind": "warn",
        "no-extra-boolean-cast": "warn",
        "no-extra-parens": "off",
        "no-extra-semi": "warn",
        "no-fallthrough": "error",
        "no-floating-decimal": "warn",
        "no-func-assign": "warn",
        "no-implied-eval": "warn",
        "no-inline-comments": "off", // keep these to a minimum
        "no-inner-declarations": ["warn", "functions"],
        "no-invalid-regexp": "warn",
        "no-irregular-whitespace": "warn",
        "no-iterator": "warn",
        "no-label-var": "warn",
        "no-labels": "warn",
        "no-lone-blocks": "warn",
        "no-lonely-if": "off", // this is a design pattern which is sometimes necessary
        "no-loop-func": "warn",
        "no-mixed-requires": "warn",
        "no-mixed-spaces-and-tabs": "warn",
        "no-multi-spaces": "warn",
        "no-multi-str": "warn",
        "no-multiple-empty-lines": ["warn", { "max": 1 }],
        "no-nested-ternary": "error", // nesting ternaries is very very confusing and usually lazy
        "no-new-func": "warn",
        "no-new-object": "warn",
        "no-new-require": "warn",
        "no-new-wrappers": "warn",
        "no-new": "warn",
        "no-obj-calls": "warn",
        "no-octal-escape": "warn",
        "no-octal": "warn",
        "no-param-reassign": [ "warn", { "props": false } ],    
        "no-path-concat": "warn",
        "no-plusplus": [ "warn", { "allowForLoopAfterthoughts": true } ],
        "no-process-env": "warn",
        "no-process-exit": "warn",
        "no-proto": "warn",
        "no-redeclare": "warn",
        "no-regex-spaces": "warn",
        "no-restricted-modules": ["warn", ""],
        "no-restricted-syntax": "off", // We are not performance restricted
        "no-return-assign": "warn",
        "no-script-url": "warn",
        "no-self-compare": "warn",
        "no-sequences": "warn",
        "no-shadow-restricted-names": "warn",
        "no-shadow": ["warn", { "allow": ["reject", "resolve", "error", "err", "e"] } ],
        "no-sparse-arrays": "warn",
        "no-sync": "off", // sync meethods are useful
        "no-ternary": "off", // ternaries are useful
        "no-this-before-super": "warn",
        "no-throw-literal": "warn",
        "no-trailing-spaces": "warn",
        "no-undef-init": "warn",
        "no-undef": "warn",
        "no-undefined": "warn",
        "no-underscore-dangle": "off", // many api calls set the variable names for us and _ dangle is required
        "no-unexpected-multiline": "warn",
        "no-unneeded-ternary": "warn",
        "no-unreachable": "warn",
        "no-unused-expressions": "warn",
        "no-unused-vars": ["warn", { "args": "all", "varsIgnorePattern": "React", "argsIgnorePattern": "event" }],
        "no-useless-rename": "warn",
        "no-var": "warn",
        "no-void": "warn",
        "no-warning-comments": ["off", { "terms": ["todo", "tofix"], "location": "start" }],
        "no-with": "warn",
        "object-curly-newline": [ "warn", { "multiline": true } ],
        "object-curly-spacing": ["warn", "always"],
        "object-shorthand": "warn",
        "one-var": ["warn", "never"],
        "operator-assignment": ["off", "never"],
        "padded-blocks": ["off", "never"],
        "prefer-const": "warn",
        "prefer-destructuring": "warn",
        "prefer-template": "off", // --fix incorrectly parses these very often
        "quote-props": ["warn", "as-needed"],
        "quotes": ["warn", "single", {"avoidEscape": true ,"allowTemplateLiterals": true}],
        "radix": "off", // This is overkill
        "react/state-in-constructor": ["warn", "never"],
        "react/jsx-filename-extension": [1, { "extensions": [".tsx", ".jsx"] }],
        "react/prop-types": "off",
        "semi-spacing": ["warn", { "before": false, "after": true }],
        "semi": ["warn", "never"],
        "sort-vars": "off", // variables should be initialized in the order they are used
        "space-before-blocks": ["warn", "always"],
        "space-before-function-paren": ["warn", { "anonymous": "always", "named": "never", "asyncArrow": "always" } ],
        "space-in-parens": ["off", "always", {"exceptions": [ "empty" ]}],
        "space-infix-ops": "warn",
        "space-unary-ops": "warn",
        "spaced-comment": ["warn", "always"],
        "strict": ["warn", "global"],
        "use-isnan": "warn",
        "valid-typeof": "warn",
        "vars-on-top": "warn",
        "wrap-iife": ["warn", "inside"],
        "wrap-regex": "warn",
        "yoda": ["warn", "never"]
    },
    "settings": {
        "import/resolver": {
            "typescript": {
              "alwaysTryTypes": true // always try to resolve types under `<roo/>@types` directory even it doesn't contain any source code, like `@types/unist`
            }
        }
    }
}