dev tools

.editorconfig

root = true

[*]
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true
charset = utf-8
indent_style = space
indent_size = 2

.eslintrc

{
  "parser": "babel-eslint",

  "rules": {
    "no-const-assign": "warn",
    "no-this-before-super": "warn",
    "no-undef": "off",
    "no-unreachable": "warn",
    "no-unused-vars": "warn",
    "constructor-super": "warn",
    "valid-typeof": "warn",
    "react/jsx-uses-react": 1,
    "react/jsx-uses-vars": 1
  },

  "plugins": [
    "react",
    "flowtype",
    "flowtype-errors"
  ],

  "extends": [
    "plugin:flowtype/recommended"
  ],

  "settings": {
    "flowtype": {
      "onlyFilesWithFlowAnnotation": true
    }
  }
}

.flowconfig

[ignore]
<PROJECT_ROOT>/.next/.*
<PROJECT_ROOT>/.out/.*
.*/node_modules/styled-components/.*

[libs]
flow-typed/

[include]

[lints]

[options]
module.name_mapper='^@'->'<PROJECT_ROOT>/app'

module.file_ext=.js
module.file_ext=.json
module.file_ext=.jsx
module.file_ext=.css
module.file_ext=.scss
module.file_ext=.svg

include_warnings=true

[strict]

.prettierrc

{
  "useTabs": false,
  "tabWidth": 2,
  "singleQuote": true,
  "semi": false,
  "jsxBracketSameLine": true,
  "trailingComma": "none",
  "bracketSpacing": true,
  "arrowParens": "avoid",
  "printWidth": 120,
  "parser": "flow"
}

flow-typed.js

// @flow
declare var React: $Exports<'react'>

package.json

{
  ...
  
	"devDependencies": {
	    "babel-eslint": "^8",
	    "eslint": "^4",
	    "eslint-plugin-flowtype": "^2",
	    "eslint-plugin-flowtype-errors": "^3",
	    "eslint-plugin-react": "^7",
	    "flow-bin": "0.69.0",
	    "prettier": "^0"
	}
 
  ...
}

rustfmt.toml

brace_style = "PreferSameLine
condense_wildcard_suffixes = true
fn_args_density = "Compressed"
fn_single_line = true
imports_indent = "Block"
imports_layout = "HorizontalVertical"
match_arm_blocks = false
max_width = 89
merge_imports = true
normalize_comments = true
reorder_impl_items = true
reorder_imports = true
tab_spaces = 2
trailing_coma = "Never"
trailing_semicolon = false
type_punctuation_density = "Compressed"
use_field_init_shorthand = true
use_try_shorthand = true
where_single_line = true
wrap_comments = true

tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "ESNEXT",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
    "module": "ESNext",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "lib": ["es2015", "es2017", "dom"],                             /* Specify library files to be included in the compilation. */
    // "allowJs": true,                       /* Allow javascript files to be compiled. */
    // "checkJs": true,                       /* Report errors in .js files. */
    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
    // "outFile": "./",                       /* Concatenate and emit output to single file. */
    // "outDir": "./",                        /* Redirect output structure to the directory. */
    // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    // "composite": true,                     /* Enable project compilation */
    // "removeComments": true,                /* Do not emit comments to output. */
    // "noEmit": true,                        /* Do not emit outputs. */
    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */

    /* Strict Type-Checking Options */
    "strict": true,                           /* Enable all strict type-checking options. */
    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
    // "strictNullChecks": true,              /* Enable strict null checks. */
    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */

    /* Additional Checks */
    // "noUnusedLocals": true,                /* Report errors on unused locals. */
    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */

    /* Module Resolution Options */
    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
    // "typeRoots": [],                       /* List of folders to include type definitions from. */
    // "types": [],                           /* Type declaration files to be included in compilation. */
    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */

    /* Source Map Options */
    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */

    /* Experimental Options */
    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
  }
}

tslint.json

{
  "defaultSeverity": "error",
  "extends": [
      "tslint:recommended",
      "tslint-config-prettier"
  ],
  "jsRules": {},
  "rules": {
      "no-console": false,
      "no-bitwise": false
  },
  "rulesDirectory": []
}