eslint: config

.babelrc

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

.eslintrc

@@ -1,10 +1,18 @@
 {
   "parserOptions": {
-    "ecmaVersion": "2018"
+    "ecmaVersion": 2019,
+    "sourceType": "module",
+    "ecmaFeatures": {
+      "jsx": true
+    }
   },
-  "extends": ["eslint:recommended"],
   "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

.gitignore

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

package.json

@@ -1,17 +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",
-    "format": "prettier --write \"**/*.+(js|jsx|json|yml|yaml|css|less|scss|ts|tsx|md|graphql|mdx)\""
+    "build": "babel src --out-dir dist"
   },
-  "keywords": [],
-  "author": "Kent C. Dodds <kent@doddsfamily.us> (http://kentcdodds.com/)",
-  "license": "MIT",
   "devDependencies": {
-    "eslint": "^5.5.0",
-    "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

@@ -1,11 +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(`${greeting} world!`);
-
-[(1, 2, 3)].forEach(x => console.log(x));
+const greeting = 'hello'
+console.log('${greeting} world!')
+[1, 2, 3].forEach(x => console.log(x))