Expand lint to catch css issues

js/.stylelintrc.json

@@ -0,0 +1,8 @@
+{
+  "extends": "stylelint-config-standard",
+  "rules": {
+    "selector-pseudo-class-no-unknown": [
+      true, { "ignorePseudoClasses": ["global"] }
+    ]
+  }
+}

js/package.json

@@ -38,8 +38,11 @@
     "start:app": "node webpack/dev.server",
     "clean": "rm -rf ./build ./coverage",
     "coveralls": "npm run testCoverage && coveralls < coverage/lcov.info",
-    "lint": "eslint --ignore-path .gitignore ./src/",
-    "lint:cached": "eslint --cache --ignore-path .gitignore ./src/",
+    "lint": "npm run lint:css && npm run lint:js",
+    "lint:cached": "npm run lint:css && npm run lint:js:cached",
+    "lint:css": "stylelint ./src/**/*.css",
+    "lint:js": "eslint --ignore-path .gitignore ./src/",
+    "lint:js:cached": "eslint --cache --ignore-path .gitignore ./src/",
     "test": "NODE_ENV=test mocha 'src/**/*.spec.js'",
     "test:coverage": "NODE_ENV=test istanbul cover _mocha -- 'src/**/*.spec.js'",
     "test:e2e": "NODE_ENV=test mocha 'src/**/*.e2e.js'",
@@ -118,6 +121,8 @@
     "sinon-as-promised": "4.0.2",
     "sinon-chai": "2.8.0",
     "style-loader": "0.13.1",
+    "stylelint": "7.6.0",
+    "stylelint-config-standard": "15.0.0",
     "url-loader": "0.5.7",
     "webpack": "2.1.0-beta.27",
     "webpack-dev-middleware": "1.8.4",