Install & configure eslint

.eslintrc

@@ -0,0 +1,22 @@
+{
+	"extends": "airbnb/base",
+	"rules": {
+		"indent": ["error", "tab"],
+    "no-tabs": 0,
+		"semi": [2, "never"],
+		"no-var": 0,
+		"vars-on-top": 0,
+		"one-var": 0,
+		"eqeqeq": 0,
+		"brace-style": [2, "stroustrup", { "allowSingleLine": true }],
+		"no-else-return": 0,
+		"no-use-before-define": [2, "nofunc"],
+		"comma-dangle": 0,
+		"object-curly-spacing": 0,
+		"max-nested-callbacks": [2, 5],
+    "arrow-parens": ["error", "always"]
+	},
+	"env": {
+		"node": true
+	}
+}

package.json

@@ -12,7 +12,8 @@
   "scripts": {
     "build": "babel src --out-dir dist",
     "prepublish": "npm test && npm run build",
-    "test": "jest"
+    "test": "jest",
+    "lint": "eslint src; exit 0"
   },
   "author": "Alasdair Smith <ali@alasdairsmith.co.uk>",
   "license": "MIT",
@@ -35,6 +36,9 @@
     "babel-polyfill": "^6.20.0",
     "babel-preset-es2015": "^6.18.0",
     "dotenv": "^2.0.0",
+    "eslint": "^3.12.2",
+    "eslint-config-airbnb": "^13.0.0",
+    "eslint-plugin-import": "^2.2.0",
     "jest": "^17.0.3",
     "webpack": "^1.14.0"
   },