Lint webpack config

.eslintrc.js

@@ -14,5 +14,13 @@ module.exports = {
   },
   rules: {
     'prettier/prettier': 'error'
+  },
+  overrides: [
+    {
+      files: ['config/webpack/*.js'],
+      env: {
+        node: true
       }
+    }
+  ]
 };

config/webpack/development.js

@@ -1,5 +1,5 @@
-process.env.NODE_ENV = process.env.NODE_ENV || 'development'
+process.env.NODE_ENV = process.env.NODE_ENV || 'development';
 
-const environment = require('./environment')
+const environment = require('./environment');
 
-module.exports = environment.toWebpackConfig()
+module.exports = environment.toWebpackConfig();

config/webpack/environment.js

@@ -1,4 +1,4 @@
-const { environment } = require('@rails/webpacker')
+const { environment } = require('@rails/webpacker');
 
 // By default don't transpile JS files in ./node_modules – except for some specific modules.
 const babelLoader = environment.loaders.get('babel');
@@ -6,8 +6,12 @@ babelLoader.exclude = function(modulePath) {
   let forcedModules = [
     'activestorage' // ActiveStorage uses 'class', which is not supported by IE 11 and older Safari version
   ];
-  return modulePath.includes('node_modules')
-    && forcedModules.every(forcedModule => !modulePath.includes('node_modules/' + forcedModule));
-}
+  return (
+    modulePath.includes('node_modules') &&
+    forcedModules.every(
+      forcedModule => !modulePath.includes('node_modules/' + forcedModule)
+    )
+  );
+};
 
-module.exports = environment
+module.exports = environment;

config/webpack/production.js

@@ -1,9 +1,9 @@
-process.env.NODE_ENV = process.env.NODE_ENV || 'production'
+process.env.NODE_ENV = process.env.NODE_ENV || 'production';
 
-const environment = require('./environment')
+const environment = require('./environment');
 
 // https://github.com/rails/webpacker/issues/1235
 environment.config.optimization.minimizer[0].options.uglifyOptions.ecma = 5; // for IE 11 support
 environment.config.optimization.minimizer[0].options.uglifyOptions.safari10 = true;
 
-module.exports = environment.toWebpackConfig()
+module.exports = environment.toWebpackConfig();

config/webpack/test.js

@@ -1,5 +1,5 @@
-process.env.NODE_ENV = process.env.NODE_ENV || 'development'
+process.env.NODE_ENV = process.env.NODE_ENV || 'development';
 
-const environment = require('./environment')
+const environment = require('./environment');
 
-module.exports = environment.toWebpackConfig()
+module.exports = environment.toWebpackConfig();

package.json

@@ -22,7 +22,7 @@
     "webpack-dev-server": "^3.1.4"
   },
   "scripts": {
-    "lint:js": "eslint ./app/javascript"
+    "lint:js": "eslint ./app/javascript ./config/webpack"
   },
   "engines": {
     "node": "6.* || 8.* || >= 10.*"