(tests) Add eslint

.eslintrc.json

@@ -0,0 +1,16 @@
+{
+	"root": true,
+	"extends": [
+		"wikimedia/client",
+		"wikimedia/jquery",
+		"wikimedia/mediawiki"
+	],
+	"globals": {
+		"require": "readonly"
+	},
+	"rules": {
+		"no-jquery/no-event-shorthand": "off",
+		"no-jquery/no-global-selector": "off",
+		"no-console": "off"
+	}
+}

.github/workflows/main.yml

@@ -20,8 +20,9 @@ jobs:
         with:
           path: ~/.composer/cache
           key: buildcache-linter
-      - run: sudo apt-get install -y composer && composer install
+      - run: sudo apt-get install -y composer npm && composer install
       - run: composer test
+      - run: npm test
 
   # Phan (PHP static analyzer)
   phan:

.gitignore

@@ -1 +1,4 @@
 vendor
+node_modules
+.eslintcache
+

.stylelintrc.json

@@ -0,0 +1,6 @@
+{
+	"extends": "stylelint-config-wikimedia",
+	"rules": {
+		"selector-max-id": null
+	}
+}

Gruntfile.js

@@ -0,0 +1,30 @@
+/* eslint-env node */
+module.exports = function ( grunt ) {
+	var conf = grunt.file.readJSON( 'extension.json' );
+
+	grunt.loadNpmTasks( 'grunt-banana-checker' );
+	grunt.loadNpmTasks( 'grunt-eslint' );
+	grunt.loadNpmTasks( 'grunt-stylelint' );
+
+	grunt.initConfig( {
+		eslint: {
+			options: {
+				cache: true
+			},
+			all: [
+				'**/*.{js,json}',
+				'!{vendor,node_modules}/**'
+			]
+		},
+		banana: conf.MessagesDirs,
+		stylelint: {
+			all: [
+				'**/*.css',
+				'!{vendor,node_modules}/**'
+			]
+		}
+	} );
+
+	grunt.registerTask( 'test', [ 'eslint', 'banana', 'stylelint' ] );
+	grunt.registerTask( 'default', 'test' );
+};

package.json

@@ -0,0 +1,14 @@
+{
+	"private": true,
+	"scripts": {
+		"test": "grunt test"
+	},
+	"devDependencies": {
+		"eslint-config-wikimedia": "0.22.1",
+		"grunt": "1.5.3",
+		"grunt-banana-checker": "0.9.00",
+		"grunt-eslint": "24.0.0",
+		"grunt-stylelint": "0.18.0",
+		"stylelint-config-wikimedia": "0.13.0"
+	}
+}