add lint scripts & apply lint fixes

package.json

@@ -9,7 +9,9 @@
   "license": "MIT",
   "scripts": {
     "build": "webpack",
-    "start": "webpack-dev-server"
+    "start": "webpack-dev-server",
+    "lint": "eslint .",
+    "lint:fix": "eslint . --fix"
   },
   "devDependencies": {
     "@babel/core": "^7.6.4",

src/scripts/background.js

@@ -1 +1 @@
-console.log("Hello World from background main file!");
+console.log('Hello World from background main file!');

src/scripts/options.js

@@ -1 +1 @@
-console.log("Hello World from options main file!");
+console.log('Hello World from options main file!');

src/scripts/popup.js

@@ -1 +1 @@
-console.log("Hello World from popup main file!");
+console.log('Hello World from popup main file!');

webpack.config.js

@@ -31,12 +31,12 @@ module.exports = {
     entry: {
         background: './src/scripts/background.js',
         popup: './src/scripts/popup.js',
-		options: './src/scripts/options.js'
+        options: './src/scripts/options.js',
     },
 
     output: {
         filename: '[name].[chunkhash].js',
-		path: path.resolve(__dirname, 'extension')
+        path: path.resolve(__dirname, 'extension'),
     },
 
     plugins: [new webpack.ProgressPlugin(), new HtmlWebpackPlugin()],
@@ -55,13 +55,13 @@ module.exports = {
                         [
                             '@babel/preset-env',
                             {
-								modules: false
+                                modules: false,
-							}
+                            },
-						]
+                        ],
-					]
+                    ],
-				}
+                },
-			}
+            },
-		]
+        ],
     },
 
     optimization: {
@@ -69,18 +69,18 @@ module.exports = {
             cacheGroups: {
                 vendors: {
                     priority: -10,
-					test: /[\\/]node_modules[\\/]/
+                    test: /[\\/]node_modules[\\/]/,
-				}
+                },
             },
 
             chunks: 'async',
             minChunks: 1,
             minSize: 30000,
-			name: true
+            name: true,
-		}
+        },
     },
 
     devServer: {
-		open: true
+        open: true,
-	}
+    },
 };