An eslint configuration that I adhere to

.eslintrc

{
  "parser": "babel-eslint",
  "ecmaFeatures": {
    "jsx": true,
    "arrowFunctions": true,
    "blockBindings": true,
    "generators": true
  },
  "rules": {
    "accessor-pairs": 0,
    "array-bracket-spacing": [ 2, "never" ],
    "arrow-parens": [ 2, "always" ],
    "arrow-spacing": 2,
    "block-scoped-var": 0,
    "block-spacing": [ 2, "always" ],
    "brace-style": [ 2, "1tbs", { "allowSingleLine": true } ],
    "camelcase": [ 2, {"properties": "never"} ],
    "comma-dangle": [ 2, "never" ],
    "comma-spacing": [ 2, { "before": false, "after": true } ],
    "comma-style": [ 2, "last" ],
    "complexity": 0,
    "computed-property-spacing": [ 2, "never" ],
    "consistent-return": 2,
    "consistent-this": [ 2, "self" ],
    "curly": 2,
    "default-case": 0,
    "dot-notation": 2,
    "dot-location": [ 2, "property" ],
    "eol-last": 2,
    "eqeqeq": 2,
    "func-names": 0,
    "func-style": [ 2, "declaration", { "allowArrowFunctions": true } ],
    "guard-for-in": 2,
    "id-length": [ 2, { "exceptions": [ "$", "_", "q", "i" ] } ],
    "init-declarations": 0,
    "jsx-quotes": [ 2, "prefer-double" ],
    "key-spacing": [ 2, { "afterColon": true } ],
    "new-cap": [ 1, { "capIsNew": false } ],
    "new-parens": 0,
    "no-caller": 2,
    "no-catch-shadow": 2,
    "no-class-assign": 2,
    "no-cond-assign": [ 2, "always" ],
    "no-console": 0,
    "no-const-assign": 2,
    "no-constant-condition": 0,
    "no-control-regex": 2,
    "no-debugger": 0,
    "no-delete-var": 2,
    "no-div-regex": 2,
    "no-dupe-args": 2,
    "no-dupe-class-members": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-else-return": 2,
    "no-empty": 2,
    "no-empty-character-class": 2,
    "no-empty-label": 2,
    "no-eq-null": 2,
    "no-eval": 2,
    "no-ex-assign": 2,
    "no-extend-native": 0,
    "no-extra-bind": 0,
    "no-extra-boolean-cast": 2,
    "no-extra-parens": 0,
    "no-extra-semi": 2,
    "no-fallthrough": 2,
    "no-floating-decimal": 2,
    "no-func-assign": 2,
    "no-implicit-coercion": 2,
    "no-implied-eval": 2,
    "no-inner-declarations": 0,
    "no-invalid-regexp": 2,
    "no-irregular-whitespace": 2,
    "no-iterator": 2,
    "no-label-var": 2,
    "no-labels": 2,
    "no-lone-blocks": 2,
    "no-loop-func": 0,
    "no-mixed-spaces-and-tabs": 2,
    "no-multi-spaces": 2,
    "no-multi-str": 2,
    "no-multiple-empty-lines": [ 2, { "max": 1 } ],
    "no-native-reassign": 2,
    "no-negated-in-lhs": 2,
    "no-new": 2,
    "no-new-func": 2,
    "no-new-wrappers": 2,
    "no-obj-calls": 2,
    "no-octal": 2,
    "no-octal-escape": 2,
    "no-process-env": 0,
    "no-proto": 2,
    "no-redeclare": 2,
    "no-regex-spaces": 2,
    "no-return-assign": 2,
    "no-script-url": 2,
    "no-self-compare": 2,
    "no-sequences": 2,
    "no-shadow": 2,
    "no-shadow-restricted-names": 2,
    "no-sparse-arrays": 2,
    "no-throw-literal": 2,
    "no-trailing-spaces": 2,
    "no-undef": 2,
    "no-undef-init": 2,
    "no-underscore-dangle": 0,
    "no-unexpected-multiline": 2,
    "no-unreachable": 2,
    "no-useless-call": 2,
    "no-useless-concat": 2,
    "no-unused-expressions": 0,
    "no-unused-vars": 0,
    "no-use-before-define": 2,
    "no-void": 2,
    "no-warning-comments": 0,
    "no-with": 2,
    "object-curly-spacing": [ 2, "always" ],
    "padded-blocks": [ 2, "never" ],
    "quote-props": [ 2, "as-needed", { "keywords": true } ],
    "quotes": [ 2, "single", "avoid-escape" ],
    "radix": 0,
    "semi": [ 2, "always" ],
    "semi-spacing": [ 2, { "before": false, "after": true } ],
    "space-after-keywords": [ 2, "always" ],
    "space-before-blocks": 2,
    "space-before-function-paren": [ 2, { "anonymous": "always", "named": "never" } ],
    "space-before-keywords": [ 2, "always" ],
    "space-in-parens": [ 2, "never" ],
    "space-infix-ops": 2,
    "space-return-throw-case": 2,
    "space-unary-ops": [ 2, { "words": true, "nonwords": false } ],
    "spaced-comment": [ 2, "always" ],
    "strict": [ 2, "global" ],
    "use-isnan": 2,
    "valid-jsdoc": 2,
    "valid-typeof": 2,
    "vars-on-top": 0,
    "wrap-iife": [ 2, "any" ],
    "yoda": [ 2, "never" ]
  },
  "env": {
    "node": true,
    "browser": true,
    "es6": true,
    "mocha": true
  },
  "globals": {
    "IS_SERVER": true,
    "sinon": true,
    "expect": true
  }
}