eslint: config

.babelrc

@@ -0,0 +1,12 @@
+{
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "targets": {
+          "node": "10"
+        }
+      }
+    ]
+  ]
+}

.eslintrc

@@ -1,11 +1,18 @@
 {
-  "parser": "babel-eslint",
   "parserOptions": {
-    "ecmaVersion": "2018"
+    "ecmaVersion": 2019,
+    "sourceType": "module",
+    "ecmaFeatures": {
+      "jsx": true
+    }
   },
-  "extends": ["eslint:recommended", "eslint-config-prettier"],
   "rules": {
-    "no-console": "off"
+    "strict": ["error", "never"],
+    "valid-typeof": "error",
+    "no-unsafe-negation": "error",
+    "no-unused-vars": "error",
+    "no-unexpected-multiline": "error",
+    "no-undef": "error"
   },
   "env": {
     "browser": true

.flowconfig

@@ -1,11 +0,0 @@
-[ignore]
-
-[include]
-
-[libs]
-
-[lints]
-
-[options]
-
-[strict]

.gitignore

@@ -1 +1,2 @@
 node_modules
+dist

.prettierignore

@@ -1,7 +0,0 @@
-node_modules
-coverage
-dist
-build
-.build
-
-# etc...

.prettierrc

@@ -1,12 +0,0 @@
-{
-  "arrowParens": "avoid",
-  "bracketSpacing": false,
-  "jsxBracketSameLine": false,
-  "printWidth": 80,
-  "proseWrap": "always",
-  "semi": false,
-  "singleQuote": true,
-  "tabWidth": 2,
-  "trailingComma": "all",
-  "useTabs": false
-}

package.json

@@ -1,25 +1,15 @@
 {
   "name": "static-testing-tools",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
+  "private": true,
+  "author": "Kent C. Dodds (http://kentcdodds.com/)",
+  "license": "GPLv3",
   "scripts": {
-    "lint": "eslint src",
-    "flow": "flow",
-    "format": "npm run prettier -- --write",
-    "prettier": "prettier \"**/*.+(js|jsx|json|yml|yaml|css|less|scss|ts|tsx|md|graphql|mdx)\"",
-    "validate": "npm run lint && npm run prettier -- --list-different && npm run flow",
-    "precommit": "npm run validate"
+    "build": "babel src --out-dir dist"
   },
-  "keywords": [],
-  "author": "Kent C. Dodds <kent@doddsfamily.us> (http://kentcdodds.com/)",
-  "license": "MIT",
   "devDependencies": {
-    "babel-eslint": "^9.0.0",
-    "eslint": "^5.5.0",
-    "eslint-config-prettier": "^3.0.1",
-    "flow-bin": "^0.81.0",
-    "husky": "^0.14.3",
-    "prettier": "^1.14.2"
+    "@babel/cli": "^7.7.0",
+    "@babel/core": "^7.7.2",
+    "@babel/preset-env": "^7.7.1",
+    "eslint": "^6.6.0"
   }
 }

src/example.js

@@ -1,10 +1,12 @@
-const name = 'Freddy'
-typeof name === 'string'
+'use strict'
 
-if (!('serviceWorker' in navigator)) {
+const username = 'freddy'
+typeof username === 'strng'
+
+if (!'serviceWorker' in navigator) {
   // you have an old browser :-(
 }
 
 const greeting = 'hello'
-console.log(`${greeting} world!`)
-;[(1, 2, 3)].forEach(x => console.log(x))
+console.log('${greeting} world!')
+[1, 2, 3].forEach(x => console.log(x))

src/flow-example.js

@@ -1,22 +0,0 @@
-// @flow
-function add(a: number, b: number): number {
-  return a + b
-}
-
-type User = {
-  name: {
-    first: string,
-    middle: string,
-    last: string,
-  },
-}
-function getFullName(user: User): string {
-  const {
-    name: {first, middle, last},
-  } = user
-  return [first, middle, last].filter(Boolean).join('')
-}
-
-add(1, 2)
-
-getFullName({name: {first: 'Joe', middle: 'Bud', last: 'Matthews'}})