eslint config

package.json

@@ -57,5 +57,39 @@
     "presets": [
       "babel-preset-react-app"
     ]
+  },
+  "eslintConfig": {
+    "extends": [
+      "eslint:recommended",
+      "plugin:react/recommended",
+      "plugin:import/errors",
+      "plugin:import/warnings"
+    ],
+    "parser": "babel-eslint",
+    "parserOptions": {
+      "ecmaVersion": 2018,
+      "sourceType": "module",
+      "ecmaFeatures": {
+        "jsx": true
+      }
+    },
+    "env": {
+      "browser": true,
+      "node": true,
+      "es6": true,
+      "jest": true
+    },
+    "rules": {
+      "no-debugger": "off",
+      "no-console": "off",
+      "no-unused-vars": "warn",
+      "react/prop-types": "warn"
+    },
+    "settings": {
+      "react": {
+        "version": "detect"
+      }
+    },
+    "root": true
   }
 }

webpack.config.dev.js

@@ -33,7 +33,7 @@ module.exports = {
       {
         test: /\.(js|jsx)$/,
         exclude: /node_modules/,
-        use: ["babel-loader"]
+        use: ["babel-loader", "eslint-loader"]
       },
       {
         test: /(\.css)$/,