React Native boilerplate: My own RN preferences translated into settings. RN 57+

.babelrc

{
  "presets": ["module:metro-react-native-babel-preset"],
  "plugins": [
    ["module-resolver", {
      "cwd": "babelrc",
      "root": ["./src"],
      "alias": {
        "theme": "./src/styles/theme",
        "env": "./env.js",
      },
      "extensions": [".js"]
    }]
  ]
}

.eslintrc.json

{
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended"
  ],
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaFeatures": {
      "impliedStrict": true,
      "jsx": true,
      "modules": true
    },
    "ecmaVersion": 8,
    "sourceType": "module"
  },
  "plugins": [
    "react",
    "prettier"
  ],
  "env": {
    "jest": true,
    "node": true,
    "browser": true
  },
  "globals": {
    "Promise": true
  },
  "settings": {
    "import/resolver": {
      "babel-module": {}
    }
  },
  "rules": {
    "prettier/prettier": [
      "error",
      {"trailingComma": "es5", "singleQuote": true, "bracketSpacing": false}
    ],

    "array-bracket-spacing": 2,
    "array-callback-return": 2,
    "arrow-body-style": 0,
    "arrow-parens": [0, "as-needed"],
    "arrow-spacing": 2,
    "block-scoped-var": 2,
    "brace-style": [2, "1tbs", {"allowSingleLine": false}],
    "camelcase": 0,
    "class-methods-use-this": 0,
    "comma-dangle": [2, {
      "objects": "always-multiline",
      "arrays": "always-multiline",
      "imports": "always-multiline",
      "exports": "always-multiline",
      "functions": "never"
    }],
    "comma-spacing": 2,
    "comma-style": 2,
    "complexity": 1,
    "computed-property-spacing": 2,
    "consistent-return": 0,
    "consistent-this": [2, "self"],
    "constructor-super": 2,
    "curly": 1,
    "dot-location": [2, "property"],
    "dot-notation": [2, {"allowPattern": "^[a-z]+(_[a-z]+)+$"}],
    "eqeqeq": [2, "smart"],
    "func-call-spacing": 2,
    "func-names": 2,
    "func-style": [2, "declaration", {"allowArrowFunctions": true}],
    "generator-star-spacing": 2,
    "global-require": 0,
    "guard-for-in": 2,
    "id-blacklist": 0,
    "indent": ["error", 2, {"SwitchCase": 1}],
    "jsx-quotes": [2, "prefer-double"],
    "key-spacing": 2,
    "keyword-spacing": 2,
    "line-comment-position": 1,
    "linebreak-style": 2,
    "lines-around-comment": [0, {"beforeBlockComment": true, "beforeLineComment": true, "allowBlockStart": true, "allowBlockEnd": true}],
    "max-lines": 0,
    "max-nested-callbacks": [2, {"max": 4}],
    "max-statements-per-line": 2,
    "multiline-ternary": 0,
    "new-cap": 0,
    "new-parens": 2,
    "newline-per-chained-call": 0,
    "no-array-constructor": 2,
    "no-caller": 2,
    "no-case-declarations": 2,
    "no-class-assign": 2,
    "no-cond-assign": 2,
    "no-confusing-arrow": 2,
    "no-console": 2,
    "no-const-assign": 2,
    "no-constant-condition": 2,
    "no-debugger": 2,
    "no-div-regex": 2,
    "no-dupe-args": 2,
    "no-dupe-class-members": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-duplicate-imports": [0, {"includeExports": true}],
    "no-else-return": 2,
    "no-empty-function": 0,
    "no-empty-pattern": 2,
    "no-empty": 2,
    "no-eval": 2,
    "no-ex-assign": 2,
    "no-extend-native": 2,
    "no-extra-bind": 2,
    "no-extra-label": 2,
    "no-extra-parens": 0,
    "no-extra-semi": 2,
    "no-fallthrough": 2,
    "no-floating-decimal": 2,
    "no-func-assign": 2,
    "no-global-assign": 2,
    "no-implicit-coercion": 2,
    "no-implicit-globals": 0,
    "no-implied-eval": 2,
    "no-inner-declarations": 0,
    "no-invalid-regexp": 2,
    "no-irregular-whitespace": 2,
    "no-iterator": 2,
    "no-labels": 2,
    "no-lone-blocks": 2,
    "no-lonely-if": 2,
    "no-loop-func": 2,
    "no-magic-numbers": 0,
    "no-mixed-operators": 2,
    "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-condition": 2,
    "no-nested-ternary": 2,
    "no-new-func": 2,
    "no-new-object": 2,
    "no-new-symbol": 2,
    "no-new-wrappers": 2,
    "no-new": 2,
    "no-octal-escape": 2,
    "no-param-reassign": 2,
    "no-process-env": 0,
    "no-process-exit": 2,
    "no-proto": 2,
    "no-redeclare": 2,
    "no-return-assign": [2, "always"],
    "no-self-assign": [2, {"props": true}],
    "no-self-compare": 2,
    "no-sequences": 2,
    "no-shadow-restricted-names": 2,
    "no-shadow": 2,
    "no-spaced-func": 2,
    "no-tabs": 2,
    "no-template-curly-in-string": 2,
    "no-ternary": 0,
    "no-this-before-super": 2,
    "no-throw-literal": 0,
    "no-trailing-spaces": 2,
    "no-undef-init": 2,
    "no-undefined": 2,
    "no-underscore-dangle": 0,
    "no-unmodified-loop-condition": 2,
    "no-unneeded-ternary": [2, {"defaultAssignment": false}],
    "no-unreachable": 2,
    "no-unsafe-finally": 2,
    "no-unsafe-negation": 2,
    "no-unused-expressions": 2,
    "no-unused-vars": [2, {"varsIgnorePattern": "^(React|_)$", "argsIgnorePattern": "^_"}],
    "no-use-before-define": [2, {"classes": false, "functions": false, "variables": false}],
    "no-useless-computed-key": 2,
    "no-useless-concat": 2,
    "no-useless-constructor": 2,
    "no-useless-escape": 2,
    "no-useless-rename": 2,
    "no-var": 2,
    "no-void": 2,
    "no-warning-comments": 1,
    "no-whitespace-before-property": 2,
    "no-with": 2,
    "object-curly-newline": 0,
    "object-curly-spacing": 2,
    "object-property-newline": 0,
    "object-shorthand": 2,
    "one-var-declaration-per-line": 2,
    "one-var": 0,
    "operator-linebreak": 0,
    "padded-blocks": [2, "never"],
    "prefer-arrow-callback": 2,
    "prefer-const": [2, {"destructuring": "all"}],
    "prefer-numeric-literals": 2,
    "prefer-reflect": 0,
    "prefer-rest-params": 2,
    "prefer-spread": 2,
    "prefer-template": 0,
    "quote-props": [2, "as-needed"],
    "quotes": [2, "single", {"avoidEscape": true}],
    "radix": 2,
    "require-yield": 2,
    "rest-spread-spacing": 2,
    "semi-spacing": 2,
    "semi": 2,
    "sort-imports": 0,
    "sort-keys": 0,
    "space-before-blocks": 2,
    "space-in-parens": 2,
    "space-infix-ops": 2,
    "space-unary-ops": [2, {"words": true, "nonwords": false}],
    "symbol-description": 2,
    "template-curly-spacing": 2,
    "valid-typeof": [2, {"requireStringLiterals": true}],
    "vars-on-top": 2,
    "wrap-iife": 2,
    "wrap-regex": 2,
    "yoda": 2,

    "react/forbid-prop-types": 0,
    "react/jsx-boolean-value": [2, "always"],
    "react/jsx-closing-bracket-location": [0, {"location": "tag-aligned"}],
    "react/jsx-curly-spacing": [2, "never"],
    "react/jsx-equals-spacing": [2, "never"],
    "react/jsx-first-prop-new-line": [2, "multiline-multiprop"],
    "react/jsx-indent-props": [2, 2],
    "react/jsx-indent": [2, 2],
    "react/jsx-key": 2,
    "react/jsx-max-props-per-line": [2, {"maximum": 3}],
    "react/jsx-no-comment-textnodes": 2,
    "react/jsx-no-literals": 2,
    "react/jsx-pascal-case": 2,
    "react/jsx-space-before-closing": 0,
    "react/jsx-wrap-multilines": 2,
    "react/no-array-index-key": 2,
    "react/no-did-mount-set-state": 2,
    "react/no-did-update-set-state": 2,
    "react/no-multi-comp": [2, {"ignoreStateless": true}],
    "react/no-render-return-value": 2,
    "react/no-string-refs": 0,
    "react/no-unescaped-entities": 2,
    "react/no-unused-prop-types": 0,
    "react/prefer-es6-class": 2,
    "react/prefer-stateless-function": 1,
    "react/require-optimization": 1,
    "react/require-render-return": 2,
    "react/self-closing-comp": 2,
    "react/sort-comp": 2,
    "react/sort-prop-types": [2, {"ignoreCase": true}],
    "react/style-prop-object": 2,
    "react/display-name": 0
  }
}

.tern-project

{
  "ecmaVersion": 6,
  "libs": [
    "browser",
    "ecma5",
    "ecma6"
  ],
  "dontLoad": [
    "node_modules/**"
  ],
  "plugins": {
    "es_modules": {},
    "doc_comment": {
      "fullDocs": true,
      "strong": true
    }
  }
}

packages.md

yarn add axios prop-types react-navigation react-redux redux redux-thunk

yarn add --dev babel-eslint eslint eslint-plugin-prettier eslint-plugin-react prettier prettier-eslint reactotron-react-native reactotron-redux redux-mock-store

ReactotronConfig.js

import Reactotron from 'reactotron-react-native';
import {reactotronRedux} from 'reactotron-redux';

const reactotron = Reactotron.configure({
  name: 'Bestest',
})
  .useReactNative({
    networking: {
      ignoreUrls: /symbolicate/,
    },
    editor: false,
    errors: {veto: _stackFrame => false},
    overlay: false,
  })
  .use(reactotronRedux());

//eslint-disable-next-line
if (__DEV__) {
  Reactotron.connect();
  Reactotron.clear();
  //eslint-disable-next-line
  log = (title, data = {}) =>
    Reactotron.display({
      name: title,
      value: data,
      preview: JSON.stringify(data).substr(0, 50),
    });
}

export default reactotron;

//usage in App.js
import {Provider} from 'react-redux';
import thunkMiddleware from 'redux-thunk';
import {applyMiddleware, compose, combineReducers} from 'redux';

import Reactotron from './ReactotronConfig';
import reducers from './src/reducers';

const appReducer = combineReducers({
  ...reducers,
});
const middleware = applyMiddleware(thunkMiddleware);
// https://github.com/jhen0409/react-native-debugger support :)
const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
const store = Reactotron.createStore(appReducer, composeEnhancers(middleware));