Lint JS files with eslint

.eslintignore

@@ -0,0 +1,13 @@
+**/*{.,-}min.js
+decidim-*/vendor/**/*.js
+**/node_modules/**
+bundle.js
+karma.conf.js
+webpack.config.js
+webpack.config.babel.js
+entry.test.js
+entry.js
+*_manifest.js
+coverage
+vendor/bundle
+**/vendor/**/*.js

.eslintrc.json

@@ -0,0 +1,3 @@
+{
+  "extends": "@decidim"
+}

package.json

@@ -16,5 +16,9 @@
   },
   "browserslist": [
     "extends @decidim/browserslist-config"
-  ]
-}
+  ],
+  "scripts": {
+    "lint": "eslint -c .eslintrc.json --ext .js app/packs/src",
+    "lint-fix": "eslint -c .eslintrc.json --ext .js app/packs/src --fix"
+  }
+}