add ESLint

.codeclimate.yml

@@ -0,0 +1,16 @@
+---
+engines:
+  eslint:
+    enabled: true
+    channel: "eslint-3"
+  duplication:
+    enabled: true
+    config:
+      languages:
+        - javascript
+ratings:
+  paths:
+  - "**.js"
+exclude_paths:
+  - node_modules/**/*
+  - test/**/*

.editorconfig

@@ -0,0 +1,11 @@
+# EditorConfig is awesome: http://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2

.eslintrc

@@ -0,0 +1,24 @@
+{
+  "extends": "airbnb",
+  "env": {
+    "node": true
+  },
+  "rules": {
+    "arrow-parens": [1, "as-needed"],
+    "brace-style": [1, "stroustrup", { "allowSingleLine": true }],
+    "comma-dangle": [2, "never"],
+    "no-unused-vars": 1,
+    "spaced-comment": [
+      1,
+      "always", {
+        "exceptions": [
+          "-+"
+        ],
+        "markers": [
+          "eslint-disable",
+          "eslint-disable-line"
+        ]
+      }
+    ]
+  }
+}

package.json

@@ -27,5 +27,15 @@
     "stylelint-config-standard": "^14.0.0",
     "stylelint-scss": "^1.3.4",
     "stylelint-selector-bem-pattern": "^1.0.0"
+  },
+  "devDependencies": {
+    "babel-eslint": "^7.1.0",
+    "eslint": "^3.9.0",
+    "eslint-config-airbnb": "^12.0.0",
+    "eslint-plugin-babel": "^3.3.0",
+    "eslint-plugin-import": "^2.0.1",
+    "eslint-plugin-jsx-a11y": "^2.2.3",
+    "eslint-plugin-promise": "^3.3.0",
+    "eslint-plugin-react": "^6.4.1"
   }
 }