From ea926db257ad3b042af86178e472b5763a695146 Mon Sep 17 00:00:00 2001
From: Alan Agius <alan.agius4@gmail.com>
Date: Mon, 1 Nov 2021 20:31:07 +0100
Subject: [PATCH] fix(@angular-devkit/build-angular): use es2015 when
 generating server bundles

ES2020 can contain JS syntax which are not compatible with all supported Node.js versions such as optional chaining.
---
 .../angular_devkit/build_angular/src/webpack/configs/server.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/angular_devkit/build_angular/src/webpack/configs/server.ts b/packages/angular_devkit/build_angular/src/webpack/configs/server.ts
index 1a1bbd9f2bda..a65e6c92e345 100644
--- a/packages/angular_devkit/build_angular/src/webpack/configs/server.ts
+++ b/packages/angular_devkit/build_angular/src/webpack/configs/server.ts
@@ -33,7 +33,8 @@ export function getServerConfig(wco: WebpackConfigOptions): Configuration {
 
   return {
     resolve: {
-      mainFields: ['es2020', 'es2015', 'main', 'module'],
+      mainFields: ['es2015', 'main', 'module'],
+      conditionNames: ['es2015', '...'],
     },
     output: {
       libraryTarget: 'commonjs',