.eslintrc.json

{
  "env": { "browser": true, "node": true, "jest": true },
  "globals": { "Clappr": true,"$": true, "Promise": true },
  "extends": ["eslint:recommended"],
  "parserOptions": { "sourceType": "module", "ecmaVersion": 2020 },
  "rules": {
    // Possible Errors
    "getter-return": ["error", { "allowImplicit": true }], // overrides eslint:recommended
    "no-await-in-loop": ["error"],
    "no-console": ["error"],
    "no-extra-parens": ["warn", "all", { "conditionalAssign": false, "returnAssign": false, "nestedBinaryExpressions": false, "enforceForArrowConditionals": false }],
    "no-import-assign": ["error"],
    "no-template-curly-in-string": ["error"],
    // Best Practices
    "accessor-pairs": ["error", { "setWithoutGet": true }],
    "array-callback-return": ["error", { "allowImplicit": true }],
    "curly": ["error", "multi", "consistent"],
    "default-param-last": ["error"],
    "dot-location": ["error", "property"],
    "dot-notation": ["error"],
    "eqeqeq": ["error", "smart"],
    "max-classes-per-file": ["error", 1],
    "no-alert": ["error"],
    "no-caller": ["error"],
    "no-eq-null": ["error"],
    "no-else-return": ["error"],
    "no-empty-function": ["warn", { "allow": ["arrowFunctions", "methods", "generatorMethods", "setters"] }],
    "no-eval": ["error"],
    "no-extend-native": ["error"],
    "no-extra-bind": ["error"],
    "no-extra-label": ["error"],
    "no-implicit-coercion": ["error", { "boolean": false }],
    "no-implicit-globals": ["error"],
    "no-implied-eval": ["error"],
    "no-iterator": ["error"],
    "no-labels": ["error"],
    "no-lone-blocks": ["error"],
    "no-loop-func": ["error"],
    "no-multi-spaces": ["error", { "ignoreEOLComments": true }],
    "no-multi-str": ["error"],
    "no-new": ["error"],
    "no-new-func": ["error"],
    "no-new-wrappers": ["error"],
    "no-octal-escape": ["error"],
    "no-param-reassign": ["error"],
    "no-proto": ["error"],
    "no-return-assign": ["error", "except-parens"],
    "no-return-await": ["error"],
    "no-self-compare": ["error"],
    "no-script-url": ["error"],
    "no-sequences": ["error"],
    "no-throw-literal": ["error"],
    "no-unmodified-loop-condition": ["error"],
    "no-unused-expressions": ["error", { "allowShortCircuit": true, "allowTernary": true }],
    "no-useless-call": ["error"],
    "no-useless-concat": ["error"],
    "no-useless-return": ["error"],
    "no-void": ["error"],
    "prefer-regex-literals": ["error"],
    "radix": ["error"],
    "require-await": ["error"],
    "wrap-iife": ["error", "inside"],
    "yoda": ["error", "never"],
    // Variables
    "no-label-var": ["error"],
    "no-restricted-globals": ["error", { "name": "event", "message": "Use local parameter instead." }],
    "no-undef-init": ["error"],
    "no-use-before-define": ["error"],
    // Stylistic Issues
    "array-bracket-newline": ["error", { "multiline": true }],
    "array-bracket-spacing": ["error", "never"],
    "array-element-newline": ["error", "consistent"],
    "block-spacing": ["error", "always"],
    "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
    "camelcase": ["error", { "properties": "always" }],
    "comma-dangle": ["error", "always-multiline"],
    "comma-spacing": ["error", { "before": false, "after": true }],
    "comma-style": ["error", "last"],
    "computed-property-spacing": ["error", "never"],
    "eol-last": ["error", "always"],
    "func-call-spacing": ["error", "never"],
    "func-style": ["error", "expression"],
    "function-call-argument-newline": ["error", "consistent"],
    "func-name-matching": ["error", "always"],
    "function-paren-newline": ["error", "consistent"],
    "implicit-arrow-linebreak": ["error", "beside"],
    "indent": ["error", 2],
    "key-spacing": ["error", { "mode": "strict" }],
    "keyword-spacing": ["error", { "before": true, "after": true }],
    "linebreak-style": ["error", "unix"],
    "lines-between-class-members": ["error", "always"],
    "max-depth": ["error", 4],
    "max-len": ["error", 144, { "ignoreTrailingComments": true, "ignoreUrls": true }],
    "new-cap": ["error"],
    "new-parens": ["error", "always"],
    "newline-per-chained-call": ["error", { "ignoreChainWithDepth": 3 }],
    "no-array-constructor": ["error"],
    "no-lonely-if": ["error"],
    "no-multi-assign": ["error"],
    "no-multiple-empty-lines": ["error", { "max": 1 }],
    "no-negated-condition": ["error"],
    "no-new-object": ["error"],
    "no-tabs": ["error"],
    "no-trailing-spaces": ["error"],
    "no-unneeded-ternary": ["error"],
    "no-whitespace-before-property": ["error"],
    "object-curly-newline": ["error", { "multiline": true }],
    "object-curly-spacing": ["error", "always"],
    "object-property-newline": ["error", { "allowAllPropertiesOnSameLine": true }],
    "one-var": ["error", { "initialized": "never", "uninitialized": "consecutive" }],
    "operator-assignment": ["error", "always"],
    "operator-linebreak": ["error", "before", { "overrides": { "=": "after" } }],
    "padded-blocks": ["error", "never"],
    "prefer-object-spread": ["error"],
    "quotes": ["error", "single"],
    "quote-props": ["error", "as-needed"],
    "semi": ["error", "never"],
    "space-before-blocks": ["error", "always"],
    "space-before-function-paren": ["error", "never"],
    "space-in-parens": ["error", "never"],
    "space-infix-ops": ["error"],
    "space-unary-ops": ["error", { "words": true, "nonwords": false }],
    "spaced-comment": ["error", "always"],
    "switch-colon-spacing": ["error", { "before": false, "after": true }],
    "template-tag-spacing": ["error", "always"],
    "unicode-bom": ["error", "never"],
    // ES6
    "arrow-body-style": ["error", "as-needed"],
    "arrow-parens": ["error", "as-needed"],
    "arrow-spacing": ["error",  { "before": true, "after": true }],
    "generator-star-spacing": ["error", { "before": false, "after": true }],
    "no-confusing-arrow": ["error"],
    "no-duplicate-imports": ["error"],
    "no-useless-computed-key": ["error"],
    "no-useless-constructor": ["error"],
    "no-useless-rename": ["error"],
    "no-var": ["error"],
    "object-shorthand": ["error", "always"],
    "prefer-arrow-callback": ["error", { "allowNamedFunctions": false, "allowUnboundThis": true }],
    "prefer-const": ["error", { "destructuring": "all", "ignoreReadBeforeAssign": true }],
    "prefer-destructuring": ["error", { "array": true, "object": true }, { "enforceForRenamedProperties": false }],
    "prefer-numeric-literals": ["error"],
    "prefer-rest-params": ["error"],
    "prefer-spread": ["error"],
    "prefer-template": ["error"],
    "rest-spread-spacing": ["error", "never"],
    "symbol-description": ["error"],
    "template-curly-spacing": ["error", "never"],
    "yield-star-spacing": ["error", { "before": false, "after": true }]
  }
}