feat(step-3): added ESLint

.eslintrc.json

@@ -0,0 +1,31 @@
+{
+  "env": {
+    "browser": true,
+    "es6": true
+  },
+  "globals": {
+    "ENV": true
+  },
+  "extends": "eslint:recommended",
+  "parserOptions": {
+    "sourceType": "module"
+  },
+  "rules": {
+    "indent": [
+      "error",
+      2
+    ],
+    "linebreak-style": [
+      "error",
+      "unix"
+    ],
+    "quotes": [
+      "error",
+      "single"
+    ],
+    "semi": [
+      "error",
+      "always"
+    ]
+  }
+}

package.json

@@ -19,7 +19,8 @@
   "devDependencies": {
     "babel-preset-es2015-rollup": "^1.2.0",
     "rollup": "^0.34.9",
-    "rollup-plugin-babel": "^2.6.1"
+    "rollup-plugin-babel": "^2.6.1",
+    "rollup-plugin-eslint": "^2.0.2"
   },
   "dependencies": {}
 }

rollup.config.js

@@ -1,12 +1,18 @@
 // Rollup plugins
 import babel from 'rollup-plugin-babel';
+import eslint from 'rollup-plugin-eslint';
 
 export default {
   entry: 'src/scripts/main.js',
   dest: 'build/js/main.min.js',
   format: 'iife',
   sourceMap: 'inline',
   plugins: [
+    eslint({
+      exclude: [
+        'src/styles/**',
+      ]
+    }),
     babel(),
   ],
 };