fixing 2 issues related to webpack-dev-server and HMR - fixes #931

Author: weaverryan

lib/config-generator.js

@@ -597,6 +597,16 @@ class ConfigGenerator {
             headers: { 'Access-Control-Allow-Origin': '*' },
             compress: true,
             historyApiFallback: true,
+            // In webpack-dev-server v4 beta 0, liveReload always causes
+            // the page to refresh, not allowing HMR to update the page.
+            // This is somehow related to the "static" option, but it's
+            // unknown if there is a better option.
+            // See https://github.com/webpack/webpack-dev-server/issues/2893
+            liveReload: false,
+            client: {
+                // see https://github.com/symfony/webpack-encore/issues/931#issuecomment-784483725
+                host: this.webpackConfig.runtimeConfig.devServerHost,
+            }
         };
 
         return applyOptionsCallback(