optimize build size

webpack.config.js

@@ -13,7 +13,7 @@ const isDev = buildMode === 'development'
 module.exports = {
   target: 'web',
   mode: buildMode,
-  devtool: "inline-source-map",
+  devtool: false,
   entry: {
     menu: path.resolve(path.join('src', 'menu.js')),
     admin: path.resolve(path.join('src', 'admin.js')),
@@ -34,6 +34,8 @@ module.exports = {
     chunkIds: 'named',
     splitChunks: {
       automaticNameDelimiter: '-',
+      minSize: 10000,
+      maxSize: 250000,
     },
     minimize: !isDev,
     minimizer: [