.eslintrc.json

{
  "env": {
    "browser": true,
    "amd": true,
    "jquery": true
  },
  "rules": {
    //Possible Errors
    "no-console": "error",
    "no-unreachable-loop": "error",

    //Best Practices
    "complexity": "error",
    "consistent-return": "error",
    "curly": "error",
    "default-case": "error",
    "dot-location": ["warn", "property"],
    "dot-notation": "warn",
    "eqeqeq": ["error", "always"],
    "guard-for-in": "error",
    "no-alert": "error",
    "no-caller": "error",
    "no-else-return": "error",
    "no-empty-function": "error",
    "no-eval": "error",
    "no-implicit-coercion": "error",
    "no-implicit-globals": "error",
    "no-implied-eval": "error",
    "no-magic-numbers": ["warn", {  "ignore": [-1, 0, 1], "ignoreArrayIndexes": true }],
    "no-new-wrappers": "error",
    "no-return-assign": "error",
    "no-script-url": "error",
    "no-self-compare": "error",
    "no-throw-literal": "error",
    "no-unmodified-loop-condition": "error",
    "no-unused-expressions": "error",
    "no-warning-comments": "warn",
    "radix": ["error", "always"],
    "wrap-iife": ["error", "any"],
    "yoda": "error",

    // strict mode
    "strict": ["error", "safe"],

    //Variables
    "no-label-var": "error",
    "no-unused-vars": "warn",

    //Stylistic
    "array-bracket-newline": ["warn", "consistent"],
//    "array-bracket-spacing": ["error", "always", { "singleValue": false }],
    "block-spacing": "warn",
    "brace-style": "warn",
    "camelcase": "warn",
    "comma-spacing": "warn",
    "comma-style": "warn",
    "eol-last": "warn",
    "func-call-spacing": "warn",
    //maybe not the best idea ?:/
    "func-name-matching": "warn",
    "func-names": ["warn", "as-needed"], //would be nice to debug without anonymous
    "id-denylist": ["warn", "data", "err", "e", "callback"],
    "indent": "warn",
    "key-spacing": "warn",
    "keyword-spacing": "warn",
    "linebreak-style": "warn",
    "max-depth": "warn",
    "max-len": "warn",
//    "max-lines-per-function" seems only to be usefull to find long functions ...
//    "max-lines-per-function": "off",
    "max-nested-callbacks": ["warn", 3],
    "max-statements-per-line": ["warn", { "max": 1 }],
    "newline-per-chained-call": ["warn", {"ignoreChainWithDepth": 1}],
    "no-array-constructor": "warn",
    "no-lonely-if": "warn",
    "no-mixed-operators": "warn",
    "no-multi-assign": "warn",
    "no-multiple-empty-lines": "warn",
    "no-negated-condition": "warn",
    "no-new-object": "warn",
    "no-trailing-spaces": "warn",
    "no-unneeded-ternary": "warn",
    "no-whitespace-before-property": "warn",
    "object-curly-newline": ["error", {
      "ObjectExpression": {"consistent": true},
      "ObjectPattern": { "consistent": true },
      "ImportDeclaration": "never",
      "ExportDeclaration": { "multiline": true, "minProperties": 3 }
    }],
    "object-curly-spacing":["warn", "never"],
    "operator-linebreak": "warn",
    "quote-props": ["warn", "consistent"], //should be "as-needed"
    "quotes": ["warn", "single", { "avoidEscape": true }],
    "semi": ["warn", "always", { "omitLastInOneLineBlock": true}],
    "semi-style": "warn",
    "space-before-blocks": "warn",
    "space-before-function-paren": "warn",
    "space-infix-ops": "warn",
    "space-unary-ops": "error"
  }
}