add eslint

.eslintrc.json

@@ -0,0 +1,33 @@
+{
+  "extends": [
+    "wikimedia/client",
+    "wikimedia/jquery",
+    "wikimedia/mediawiki",
+    "wikimedia/client-es6"
+  ],
+  "globals": {
+    "require": "readonly",
+    "module": "readonly",
+    "OO": "readonly",
+    "jQuery": "readonly"
+  },
+  "rules": {
+    "space-before-function-paren": "off",
+    "no-jquery/no-global-selector": "off",
+    "vars-on-top": "off",
+    "one-var": "off",
+    "no-use-before-define": "off",
+    "mediawiki/class-doc": "off",
+    "mediawiki/no-nodelist-unsupported-methods": "off",
+    "jsdoc/require-param-type": "off",
+    "es-x/no-classes": "off",
+    "es-x/no-block-scoped-variables": "off",
+    "es-x/no-spread-elements": "off",
+    "es-x/no-default-parameters": "off",
+    "es-x/no-array-prototype-includes": "off",
+    "es-x/no-string-prototype-includes": "off",
+    "es-x/no-array-from": "off",
+    "es-x/no-template-literals": "off",
+    "es-x/no-for-of-loops": "off"
+  }
+}

package.json

@@ -7,6 +7,7 @@
 	"license": "MIT",
 	"private": true,
 	"devDependencies": {
+		"eslint-config-wikimedia": "*",
 		"stylelint-config-wikimedia": "*"
 	},
 	"scripts": {

resources/scripts/ext.networknotice.Notice.js

@@ -52,5 +52,4 @@
 			}
 		} );
 	}
-
-} ( window, document ) );
+}( window, document ) );