Fix webpack dev server checks

webpack.common.js

@@ -2,6 +2,7 @@ const path = require('path');
 const { CleanWebpackPlugin } = require('clean-webpack-plugin');
 const CopyPlugin = require('copy-webpack-plugin');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
+const { DefinePlugin } = require('webpack');
 
 const Assets = [
     'native-promise-only/npo.js',
@@ -30,6 +31,9 @@ module.exports = {
         ]
     },
     plugins: [
+        new DefinePlugin({
+            __WEBPACK_SERVE__: JSON.stringify(!!process.env.WEBPACK_SERVE)
+        }),
         new CleanWebpackPlugin(),
         new HtmlWebpackPlugin({
             filename: 'index.html',

webpack.dev.js

@@ -1,6 +1,5 @@
 const common = require('./webpack.common');
 const { merge } = require('webpack-merge');
-const { DefinePlugin } = require('webpack');
 
 module.exports = merge(common, {
     // In order for live reload to work we must use "web" as the target not "browserlist"
@@ -24,11 +23,6 @@ module.exports = merge(common, {
             }
         ]
     },
-    plugins: [
-        new DefinePlugin({
-            __WEBPACK_SERVE__: true
-        })
-    ],
     devServer: {
         compress: true,
         client: {